Configuration #

CoreOptions #

Core options for paimon.

Key	Default	Type	Description
async-file-write	true	Boolean	Whether to enable asynchronous IO writing when writing files.
auto-create	false	Boolean	Whether to create underlying storage when reading and writing the table.
branch	"main"	String	Specify branch name.
bucket	-1	Integer	Bucket number for file store. It should either be equal to -1 (dynamic bucket mode), or it must be greater than 0 (fixed bucket mode).
bucket-key	(none)	String	Specify the paimon distribution policy. Data is assigned to each bucket according to the hash value of bucket-key. If you specify multiple fields, delimiter is ','. If not specified, the primary key will be used; if there is no primary key, the full row will be used.
cache-page-size	64 kb	MemorySize	Memory page size for caching.
changelog-file.prefix	"changelog-"	String	Specify the file name prefix of changelog files.
changelog-producer	none	Enum	Whether to double write to a changelog file. This changelog file keeps the details of data changes, it can be read directly during stream reads. This can be applied to tables with primary keys. Possible values: "none": No changelog file. "input": Double write to a changelog file when flushing memory table, the changelog is from input. "full-compaction": Generate changelog files with each full compaction. "lookup": Generate changelog files through 'lookup' before committing the data writing.
changelog-producer.row-deduplicate	false	Boolean	Whether to generate -U, +U changelog for the same record. This configuration is only valid for the changelog-producer is lookup or full-compaction.
changelog-producer.row-deduplicate-ignore-fields	(none)	String	Fields that are ignored for comparison while generating -U, +U changelog for the same record. This configuration is only valid for the changelog-producer.row-deduplicate is true.
changelog.num-retained.max	(none)	Integer	The maximum number of completed changelog to retain. Should be greater than or equal to the minimum number.
changelog.num-retained.min	(none)	Integer	The minimum number of completed changelog to retain. Should be greater than or equal to 1.
changelog.time-retained	(none)	Duration	The maximum time of completed changelog to retain.
commit.callback.#.param	(none)	String	Parameter string for the constructor of class #. Callback class should parse the parameter by itself.
commit.callbacks	(none)	String	A list of commit callback classes to be called after a successful commit. Class names are connected with comma (example: com.test.CallbackA,com.sample.CallbackB).
commit.force-compact	false	Boolean	Whether to force a compaction before commit.
commit.force-create-snapshot	false	Boolean	Whether to force create snapshot on commit.
commit.max-retries	10	Integer	Maximum number of retries when commit failed.
commit.user-prefix	(none)	String	Specifies the commit user prefix.
compaction.max-size-amplification-percent	200	Integer	The size amplification is defined as the amount (in percentage) of additional storage needed to store a single byte of data in the merge tree for changelog mode table.
compaction.max.file-num	(none)	Integer	For file set [f_0,...,f_N], the maximum file number to trigger a compaction for append-only table, even if sum(size(f_i)) < targetFileSize. This value avoids pending too much small files. Default value of Append Table is '50'. Default value of Bucketed Append Table is '5'.
compaction.min.file-num	5	Integer	For file set [f_0,...,f_N], the minimum file number which satisfies sum(size(f_i)) >= targetFileSize to trigger a compaction for append-only table. This value avoids almost-full-file to be compacted, which is not cost-effective.
compaction.optimization-interval	(none)	Duration	Implying how often to perform an optimization compaction, this configuration is used to ensure the query timeliness of the read-optimized system table.
compaction.size-ratio	1	Integer	Percentage flexibility while comparing sorted run size for changelog mode table. If the candidate sorted run(s) size is 1% smaller than the next sorted run's size, then include next sorted run into this candidate set.
consumer-id	(none)	String	Consumer id for recording the offset of consumption in the storage.
consumer.expiration-time	(none)	Duration	The expiration interval of consumer files. A consumer file will be expired if it's lifetime after last modification is over this value.
consumer.ignore-progress	false	Boolean	Whether to ignore consumer progress for the newly started job.
consumer.mode	exactly-once	Enum	Specify the consumer consistency mode for table. Possible values: "exactly-once": Readers consume data at snapshot granularity, and strictly ensure that the snapshot-id recorded in the consumer is the snapshot-id + 1 that all readers have exactly consumed. "at-least-once": Each reader consumes snapshots at a different rate, and the snapshot with the slowest consumption progress among all readers will be recorded in the consumer.
continuous.discovery-interval	10 s	Duration	The discovery interval of continuous reading.
cross-partition-upsert.bootstrap-parallelism	10	Integer	The parallelism for bootstrap in a single task for cross partition upsert.
cross-partition-upsert.index-ttl	(none)	Duration	The TTL in rocksdb index for cross partition upsert (primary keys not contain all partition fields), this can avoid maintaining too many indexes and lead to worse and worse performance, but please note that this may also cause data duplication.
data-file.prefix	"data-"	String	Specify the file name prefix of data files.
delete-file.thread-num	(none)	Integer	The maximum number of concurrent deleting files. By default is the number of processors available to the Java virtual machine.
delete.force-produce-changelog	false	Boolean	Force produce changelog in delete sql, or you can use 'streaming-read-overwrite' to read changelog from overwrite commit.
deletion-vector.index-file.target-size	2 mb	MemorySize	The target size of deletion vector index file.
deletion-vectors.enabled	false	Boolean	Whether to enable deletion vectors mode. In this mode, index files containing deletion vectors are generated when data is written, which marks the data for deletion. During read operations, by applying these index files, merging can be avoided.
dynamic-bucket.assigner-parallelism	(none)	Integer	Parallelism of assigner operator for dynamic bucket mode, it is related to the number of initialized bucket, too small will lead to insufficient processing speed of assigner.
dynamic-bucket.initial-buckets	(none)	Integer	Initial buckets for a partition in assigner operator for dynamic bucket mode.
dynamic-bucket.target-row-num	2000000	Long	If the bucket is -1, for primary key table, is dynamic bucket mode, this option controls the target row number for one bucket.
dynamic-partition-overwrite	true	Boolean	Whether only overwrite dynamic partition when overwriting a partitioned table with dynamic partition columns. Works only when the table has partition keys.
end-input.check-partition-expire	false	Boolean	Optional endInput check partition expire used in case of batch mode or bounded stream.
fields.default-aggregate-function	(none)	String	Default aggregate function of all fields for partial-update and aggregate merge function.
file-index.in-manifest-threshold	500 bytes	MemorySize	The threshold to store file index bytes in manifest.
file-index.read.enabled	true	Boolean	Whether enabled read file index.
file-reader-async-threshold	10 mb	MemorySize	The threshold for read file async.
file.block-size	(none)	MemorySize	File block size of format, default value of orc stripe is 64 MB, and parquet row group is 128 MB.
file.compression	"zstd"	String	Default file compression. For faster read and write, it is recommended to use zstd.
file.compression.per.level		Map	Define different compression policies for different level, you can add the conf like this: 'file.compression.per.level' = '0:lz4,1:zstd'.
file.compression.zstd-level	1	Integer	Default file compression zstd level. For higher compression rates, it can be configured to 9, but the read and write speed will significantly decrease.
file.format	"parquet"	String	Specify the message format of data files, currently orc, parquet and avro are supported.
file.format.per.level		Map	Define different file format for different level, you can add the conf like this: 'file.format.per.level' = '0:avro,3:parquet', if the file format for level is not provided, the default format which set by `file.format` will be used.
file.suffix.include.compression	false	Boolean	Whether to add file compression type in the file name of data file and changelog file.
force-lookup	false	Boolean	Whether to force the use of lookup for compaction.
full-compaction.delta-commits	(none)	Integer	Full compaction will be constantly triggered after delta commits.
ignore-delete	false	Boolean	Whether to ignore delete records.
incremental-between	(none)	String	Read incremental changes between start snapshot (exclusive) and end snapshot, for example, '5,10' means changes between snapshot 5 and snapshot 10.
incremental-between-scan-mode	auto	Enum	Scan kind when Read incremental changes between start snapshot (exclusive) and end snapshot. Possible values: "auto": Scan changelog files for the table which produces changelog files. Otherwise, scan newly changed files. "delta": Scan newly changed files between snapshots. "changelog": Scan changelog files between snapshots.
incremental-between-timestamp	(none)	String	Read incremental changes between start timestamp (exclusive) and end timestamp, for example, 't1,t2' means changes between timestamp t1 and timestamp t2.
local-merge-buffer-size	(none)	MemorySize	Local merge will buffer and merge input records before they're shuffled by bucket and written into sink. The buffer will be flushed when it is full. Mainly to resolve data skew on primary keys. We recommend starting with 64 mb when trying out this feature.
local-sort.max-num-file-handles	128	Integer	The maximal fan-in for external merge sort. It limits the number of file handles. If it is too small, may cause intermediate merging. But if it is too large, it will cause too many files opened at the same time, consume memory and lead to random reading.
lookup-wait	true	Boolean	When need to lookup, commit will wait for compaction by lookup.
lookup.cache-file-retention	1 h	Duration	The cached files retention time for lookup. After the file expires, if there is a need for access, it will be re-read from the DFS to build an index on the local disk.
lookup.cache-max-disk-size	infinite	MemorySize	Max disk size for lookup cache, you can use this option to limit the use of local disks.
lookup.cache-max-memory-size	256 mb	MemorySize	Max memory size for lookup cache.
lookup.cache-spill-compression	"zstd"	String	Spill compression for lookup cache, currently zstd, none, lz4 and lzo are supported.
lookup.cache.bloom.filter.enabled	true	Boolean	Whether to enable the bloom filter for lookup cache.
lookup.cache.bloom.filter.fpp	0.05	Double	Define the default false positive probability for lookup cache bloom filters.
lookup.cache.high-priority-pool-ratio	0.25	Double	The fraction of cache memory that is reserved for high-priority data like index, filter.
lookup.hash-load-factor	0.75	Float	The index load factor for lookup.
lookup.local-file-type	hash	Enum	The local file type for lookup. Possible values: "sort": Construct a sorted file for lookup. "hash": Construct a hash file for lookup.
manifest.compression	"zstd"	String	Default file compression for manifest.
manifest.format	"avro"	String	Specify the message format of manifest files.
manifest.full-compaction-threshold-size	16 mb	MemorySize	The size threshold for triggering full compaction of manifest.
manifest.merge-min-count	30	Integer	To avoid frequent manifest merges, this parameter specifies the minimum number of ManifestFileMeta to merge.
manifest.target-file-size	8 mb	MemorySize	Suggested file size of a manifest file.
merge-engine	deduplicate	Enum	Specify the merge engine for table with primary key. Possible values: "deduplicate": De-duplicate and keep the last row. "partial-update": Partial update non-null fields. "aggregation": Aggregate fields with same primary key. "first-row": De-duplicate and keep the first row.
metadata.stats-dense-store	false	Boolean	Whether to store statistic densely in metadata (manifest files), which will significantly reduce the storage size of metadata when the none statistic mode is set. Note, when this mode is enabled, the Paimon sdk in reading engine requires at least version 0.9.1 or 1.0.0 or higher.
metadata.stats-mode	"truncate(16)"	String	The mode of metadata stats collection. none, counts, truncate(16), full is available. "none": means disable the metadata stats collection. "counts" means only collect the null count. "full": means collect the null count, min/max value. "truncate(16)": means collect the null count, min/max value with truncated length of 16. Field level stats mode can be specified by fields.{field_name}.stats-mode
metastore.partitioned-table	false	Boolean	Whether to create this table as a partitioned table in metastore. For example, if you want to list all partitions of a Paimon table in Hive, you need to create this table as a partitioned table in Hive metastore. This config option does not affect the default filesystem metastore.
metastore.tag-to-partition	(none)	String	Whether to create this table as a partitioned table for mapping non-partitioned table tags in metastore. This allows the Hive engine to view this table in a partitioned table view and use partitioning field to read specific partitions (specific tags).
metastore.tag-to-partition.preview	none	Enum	Whether to preview tag of generated snapshots in metastore. This allows the Hive engine to query specific tag before creation. Possible values: "none": No automatically created tags. "process-time": Based on the time of the machine, create TAG once the processing time passes period time plus delay. "watermark": Based on the watermark of the input, create TAG once the watermark passes period time plus delay. "batch": In the batch processing scenario, the tag corresponding to the current snapshot is generated after the task is completed.
num-levels	(none)	Integer	Total level number, for example, there are 3 levels, including 0,1,2 levels.
num-sorted-run.compaction-trigger	5	Integer	The sorted run number to trigger compaction. Includes level0 files (one file one sorted run) and high-level runs (one level one sorted run).
num-sorted-run.stop-trigger	(none)	Integer	The number of sorted runs that trigger the stopping of writes, the default value is 'num-sorted-run.compaction-trigger' + 3.
object-location	(none)	String	The object location for object table.
page-size	64 kb	MemorySize	Memory page size.
parquet.enable.dictionary	(none)	Integer	Turn off the dictionary encoding for all fields in parquet.
partial-update.remove-record-on-delete	false	Boolean	Whether to remove the whole row in partial-update engine when -D records are received.
partial-update.remove-record-on-sequence-group	(none)	String	Whether to remove the whole row in partial-update engine when -D records of specified sequence group are received.
partition	(none)	String	Define partition by table options, cannot define partition on DDL and table options at the same time.
partition.default-name	"__DEFAULT_PARTITION__"	String	The default partition name in case the dynamic partition column value is null/empty string.
partition.end-input-to-done	false	Boolean	Whether mark the done status to indicate that the data is ready when end input.
partition.expiration-check-interval	1 h	Duration	The check interval of partition expiration.
partition.expiration-strategy	values-time	Enum	The strategy determines how to extract the partition time and compare it with the current time. Possible values: "values-time": This strategy compares the time extracted from the partition value with the current time. "update-time": This strategy compares the last update time of the partition with the current time.
partition.expiration-time	(none)	Duration	The expiration interval of a partition. A partition will be expired if it‘s lifetime is over this value. Partition time is extracted from the partition value.
partition.legacy-name	true	Boolean	The legacy partition name is using `toString` fpr all types. If false, using cast to string for all types.
partition.mark-done-action	"success-file"	String	Action to mark a partition done is to notify the downstream application that the partition has finished writing, the partition is ready to be read. 1. 'success-file': add '_success' file to directory. 2. 'done-partition': add 'xxx.done' partition to metastore. 3. 'mark-event': mark partition event to metastore. Both can be configured at the same time: 'done-partition,success-file,mark-event'.
partition.timestamp-formatter	(none)	String	The formatter to format timestamp from string. It can be used with 'partition.timestamp-pattern' to create a formatter using the specified value. Default formatter is 'yyyy-MM-dd HH:mm:ss' and 'yyyy-MM-dd'. Supports multiple partition fields like '$year-$month-$day $hour:00:00'. The timestamp-formatter is compatible with Java's DateTimeFormatter.
partition.timestamp-pattern	(none)	String	You can specify a pattern to get a timestamp from partitions. The formatter pattern is defined by 'partition.timestamp-formatter'. By default, read from the first field. If the timestamp in the partition is a single field called 'dt', you can use '$dt'. If it is spread across multiple fields for year, month, day, and hour, you can use '$year-$month-$day $hour:00:00'. If the timestamp is in fields dt and hour, you can use '$dt $hour:00:00'.
primary-key	(none)	String	Define primary key by table options, cannot define primary key on DDL and table options at the same time.
read.batch-size	1024	Integer	Read batch size for any file format if it supports.
record-level.expire-time	(none)	Duration	Record level expire time for primary key table, expiration happens in compaction, there is no strong guarantee to expire records in time. You must specific 'record-level.time-field' too.
record-level.time-field	(none)	String	Time field for record level expire. It supports the following types: `timestamps in seconds with INT`,`timestamps in seconds with BIGINT`, `timestamps in milliseconds with BIGINT` or `timestamp`.
rowkind.field	(none)	String	The field that generates the row kind for primary key table, the row kind determines which data is '+I', '-U', '+U' or '-D'.
scan.bounded.watermark	(none)	Long	End condition "watermark" for bounded streaming mode. Stream reading will end when a larger watermark snapshot is encountered.
scan.fallback-branch	(none)	String	When a batch job queries from a table, if a partition does not exist in the current branch, the reader will try to get this partition from this fallback branch.
scan.file-creation-time-millis	(none)	Long	After configuring this time, only the data files created after this time will be read. It is independent of snapshots, but it is imprecise filtering (depending on whether or not compaction occurs).
scan.manifest.parallelism	(none)	Integer	The parallelism of scanning manifest files, default value is the size of cpu processor. Note: Scale-up this parameter will increase memory usage while scanning manifest files. We can consider downsize it when we encounter an out of memory exception while scanning
scan.max-splits-per-task	10	Integer	Max split size should be cached for one task while scanning. If splits size cached in enumerator are greater than tasks size multiply by this value, scanner will pause scanning.
scan.mode	default	Enum	Specify the scanning behavior of the source. Possible values: "default": Determines actual startup mode according to other table properties. If "scan.timestamp-millis" is set the actual startup mode will be "from-timestamp", and if "scan.snapshot-id" or "scan.tag-name" is set the actual startup mode will be "from-snapshot". Otherwise the actual startup mode will be "latest-full". "latest-full": For streaming sources, produces the latest snapshot on the table upon first startup, and continue to read the latest changes. For batch sources, just produce the latest snapshot but does not read new changes. "full": Deprecated. Same as "latest-full". "latest": For streaming sources, continuously reads latest changes without producing a snapshot at the beginning. For batch sources, behaves the same as the "latest-full" startup mode. "compacted-full": For streaming sources, produces a snapshot after the latest compaction on the table upon first startup, and continue to read the latest changes. For batch sources, just produce a snapshot after the latest compaction but does not read new changes. Snapshots of full compaction are picked when scheduled full-compaction is enabled. "from-timestamp": For streaming sources, continuously reads changes starting from timestamp specified by "scan.timestamp-millis", without producing a snapshot at the beginning. For batch sources, produces a snapshot at timestamp specified by "scan.timestamp-millis" but does not read new changes. "from-file-creation-time": For streaming and batch sources, produces a snapshot and filters the data files by creation time. For streaming sources, upon first startup, and continue to read the latest changes. "from-snapshot": For streaming sources, continuously reads changes starting from snapshot specified by "scan.snapshot-id", without producing a snapshot at the beginning. For batch sources, produces a snapshot specified by "scan.snapshot-id" or "scan.tag-name" but does not read new changes. "from-snapshot-full": For streaming sources, produces from snapshot specified by "scan.snapshot-id" on the table upon first startup, and continuously reads changes. For batch sources, produces a snapshot specified by "scan.snapshot-id" but does not read new changes. "incremental": Read incremental changes between start and end snapshot or timestamp.
scan.plan-sort-partition	false	Boolean	Whether to sort plan files by partition fields, this allows you to read according to the partition order, even if your partition writes are out of order. It is recommended that you use this for streaming read of the 'append-only' table. By default, streaming read will read the full snapshot first. In order to avoid the disorder reading for partitions, you can open this option.
scan.snapshot-id	(none)	Long	Optional snapshot id used in case of "from-snapshot" or "from-snapshot-full" scan mode
scan.tag-name	(none)	String	Optional tag name used in case of "from-snapshot" scan mode.
scan.timestamp	(none)	String	Optional timestamp used in case of "from-timestamp" scan mode, it will be automatically converted to timestamp in unix milliseconds, use local time zone
scan.timestamp-millis	(none)	Long	Optional timestamp used in case of "from-timestamp" scan mode. If there is no snapshot earlier than this time, the earliest snapshot will be chosen.
scan.watermark	(none)	Long	Optional watermark used in case of "from-snapshot" scan mode. If there is no snapshot later than this watermark, will throw an exceptions.
sequence.field	(none)	String	The field that generates the sequence number for primary key table, the sequence number determines which data is the most recent.
sequence.field.sort-order	ascending	Enum	Specify the order of sequence.field. Possible values: "ascending": specifies sequence.field sort order is ascending. "descending": specifies sequence.field sort order is descending.
sink.watermark-time-zone	"UTC"	String	The time zone to parse the long watermark value to TIMESTAMP value. The default value is 'UTC', which means the watermark is defined on TIMESTAMP column or not defined. If the watermark is defined on TIMESTAMP_LTZ column, the time zone of watermark is user configured time zone, the value should be the user configured local time zone. The option value is either a full name such as 'America/Los_Angeles', or a custom timezone id such as 'GMT-08:00'.
snapshot.clean-empty-directories	false	Boolean	Whether to try to clean empty directories when expiring snapshots, if enabled, please note: hdfs: may print exceptions in NameNode. oss/s3: may cause performance issue.
snapshot.expire.execution-mode	sync	Enum	Specifies the execution mode of expire. Possible values: "sync": Execute expire synchronously. If there are too many files, it may take a long time and block stream processing. "async": Execute expire asynchronously. If the generation of snapshots is greater than the deletion, there will be a backlog of files.
snapshot.expire.limit	50	Integer	The maximum number of snapshots allowed to expire at a time.
snapshot.num-retained.max	infinite	Integer	The maximum number of completed snapshots to retain. Should be greater than or equal to the minimum number.
snapshot.num-retained.min	10	Integer	The minimum number of completed snapshots to retain. Should be greater than or equal to 1.
snapshot.time-retained	1 h	Duration	The maximum time of completed snapshots to retain.
snapshot.watermark-idle-timeout	(none)	Duration	In watermarking, if a source remains idle beyond the specified timeout duration, it triggers snapshot advancement and facilitates tag creation.
sort-compaction.local-sample.magnification	1000	Integer	The magnification of local sample for sort-compaction.The size of local sample is sink parallelism * magnification.
sort-compaction.range-strategy	QUANTITY	Enum	The range strategy of sort compaction, the default value is quantity. If the data size allocated for the sorting task is uneven,which may lead to performance bottlenecks, the config can be set to size. Possible values: "SIZE" "QUANTITY"
sort-engine	loser-tree	Enum	Specify the sort engine for table with primary key. Possible values: "min-heap": Use min-heap for multiway sorting. "loser-tree": Use loser-tree for multiway sorting. Compared with heapsort, loser-tree has fewer comparisons and is more efficient.
sort-spill-buffer-size	64 mb	MemorySize	Amount of data to spill records to disk in spilled sort.
sort-spill-threshold	(none)	Integer	If the maximum number of sort readers exceeds this value, a spill will be attempted. This prevents too many readers from consuming too much memory and causing OOM.
source.split.open-file-cost	4 mb	MemorySize	Open file cost of a source file. It is used to avoid reading too many files with a source split, which can be very slow.
source.split.target-size	128 mb	MemorySize	Target size of a source split when scanning a bucket.
spill-compression	"zstd"	String	Compression for spill, currently zstd, lzo and zstd are supported.
spill-compression.zstd-level	1	Integer	Default spill compression zstd level. For higher compression rates, it can be configured to 9, but the read and write speed will significantly decrease.
streaming-read-mode	(none)	Enum	The mode of streaming read that specifies to read the data of table file or log. Possible values: "log": Read from the data of table log store. "file": Read from the data of table file store.
streaming-read-overwrite	false	Boolean	Whether to read the changes from overwrite in streaming mode. Cannot be set to true when changelog producer is full-compaction or lookup because it will read duplicated changes.
streaming.read.snapshot.delay	(none)	Duration	The delay duration of stream read when scan incremental snapshots.
tag.automatic-completion	false	Boolean	Whether to automatically complete missing tags.
tag.automatic-creation	none	Enum	Whether to create tag automatically. And how to generate tags. Possible values: "none": No automatically created tags. "process-time": Based on the time of the machine, create TAG once the processing time passes period time plus delay. "watermark": Based on the watermark of the input, create TAG once the watermark passes period time plus delay. "batch": In the batch processing scenario, the tag corresponding to the current snapshot is generated after the task is completed.
tag.callback.#.param	(none)	String	Parameter string for the constructor of class #. Callback class should parse the parameter by itself.
tag.callbacks	(none)	String	A list of commit callback classes to be called after a successful tag. Class names are connected with comma (example: com.test.CallbackA,com.sample.CallbackB).
tag.creation-delay	0 ms	Duration	How long is the delay after the period ends before creating a tag. This can allow some late data to enter the Tag.
tag.creation-period	daily	Enum	What frequency is used to generate tags. Possible values: "daily": Generate a tag every day. "hourly": Generate a tag every hour. "two-hours": Generate a tag every two hours.
tag.default-time-retained	(none)	Duration	The default maximum time retained for newly created tags. It affects both auto-created tags and manually created (by procedure) tags.
tag.num-retained-max	(none)	Integer	The maximum number of tags to retain. It only affects auto-created tags.
tag.period-formatter	with_dashes	Enum	The date format for tag periods. Possible values: "with_dashes": Dates and hours with dashes, e.g., 'yyyy-MM-dd HH' "without_dashes": Dates and hours without dashes, e.g., 'yyyyMMdd HH'
target-file-size	(none)	MemorySize	Target size of a file. primary key table: the default value is 128 MB. append table: the default value is 256 MB.
type	table	Enum	Type of the table. Possible values: "table": Normal Paimon table. "format-table": A file format table refers to a directory that contains multiple files of the same format. "materialized-table": A materialized table combines normal Paimon table and materialized SQL. "object-table": A object table combines normal Paimon table and object location.
write-buffer-for-append	false	Boolean	This option only works for append-only table. Whether the write use write buffer to avoid out-of-memory error.
write-buffer-size	256 mb	MemorySize	Amount of data to build up in memory before converting to a sorted on-disk file.
write-buffer-spill.max-disk-size	infinite	MemorySize	The max disk to use for write buffer spill. This only work when the write buffer spill is enabled
write-buffer-spillable	(none)	Boolean	Whether the write buffer can be spillable. Enabled by default when using object storage.
write-manifest-cache	0 bytes	MemorySize	Cache size for reading manifest files for write initialization.
write-max-writers-to-spill	10	Integer	When in batch append inserting, if the writer number is greater than this option, we open the buffer cache and spill function to avoid out-of-memory.
write-only	false	Boolean	If set to true, compactions and snapshot expiration will be skipped. This option is used along with dedicated compact jobs.
write.batch-size	1024	Integer	Write batch size for any file format if it supports.
zorder.var-length-contribution	8	Integer	The bytes of types (CHAR, VARCHAR, BINARY, VARBINARY) devote to the zorder sort.

CatalogOptions #

Options for paimon catalog.

Key	Default	Type	Description
allow-upper-case	(none)	Boolean	Indicates whether this catalog allow upper case, its default value depends on the implementation of the specific catalog.
cache-enabled	true	Boolean	Controls whether the catalog will cache databases, tables and manifests.
cache.expiration-interval	10 min	Duration	Controls the duration for which databases and tables in the catalog are cached.
cache.manifest.max-memory	(none)	MemorySize	Controls the maximum memory to cache manifest content.
cache.manifest.small-file-memory	128 mb	MemorySize	Controls the cache memory to cache small manifest files.
cache.manifest.small-file-threshold	1 mb	MemorySize	Controls the threshold of small manifest file.
cache.partition.max-num	0	Long	Controls the max number for which partitions in the catalog are cached.
client-pool-size	2	Integer	Configure the size of the connection pool.
format-table.enabled	true	Boolean	Whether to support format tables, format table corresponds to a regular csv, parquet or orc table, allowing read and write operations. However, during these processes, it does not connect to the metastore; hence, newly added partitions will not be reflected in the metastore and need to be manually added as separate partition operations.
lineage-meta	(none)	String	The lineage meta to store table and data lineage information. Possible values: "jdbc": Use standard jdbc to store table and data lineage information. "custom": You can implement LineageMetaFactory and LineageMeta to store lineage information in customized storage.
lock-acquire-timeout	8 min	Duration	The maximum time to wait for acquiring the lock.
lock-check-max-sleep	8 s	Duration	The maximum sleep time when retrying to check the lock.
lock.enabled	(none)	Boolean	Enable Catalog Lock.
lock.type	(none)	String	The Lock Type for Catalog, such as 'hive', 'zookeeper'.
metastore	"filesystem"	String	Metastore of paimon catalog, supports filesystem, hive and jdbc.
sync-all-properties	false	Boolean	Sync all table properties to hive metastore
table.type	managed	Enum	Type of table. Possible values: "managed": Paimon owned table where the entire lifecycle of the table data is managed. "external": The table where Paimon has loose coupling with the data stored in external locations.
uri	(none)	String	Uri of metastore server.
warehouse	(none)	String	The warehouse root path of catalog.

FilesystemCatalogOptions #

Options for Filesystem catalog.

Key	Default	Type	Description
case-sensitive	true	Boolean	Is case sensitive. If case insensitive, you need to set this option to false, and the table name and fields be converted to lowercase.

HiveCatalogOptions #

Options for Hive catalog.

Key	Default	Type	Description
client-pool-cache.eviction-interval-ms	300000	Long	Setting the client's pool cache eviction interval(ms).
client-pool-cache.keys	(none)	String	Specify client cache key, multiple elements separated by commas. "ugi": the Hadoop UserGroupInformation instance that represents the current user using the cache. "user_name" similar to UGI but only includes the user's name determined by UserGroupInformation#getUserName. "conf": name of an arbitrary configuration. The value of the configuration will be extracted from catalog properties and added to the cache key. A conf element should start with a "conf:" prefix which is followed by the configuration name. E.g. specifying "conf:a.b.c" will add "a.b.c" to the key, and so that configurations with different default catalog wouldn't share the same client pool. Multiple conf elements can be specified.
hadoop-conf-dir	(none)	String	File directory of the core-site.xml、hdfs-site.xml、yarn-site.xml、mapred-site.xml. Currently, only local file system paths are supported. If not configured, try to load from 'HADOOP_CONF_DIR' or 'HADOOP_HOME' system environment. Configure Priority: 1.from 'hadoop-conf-dir' 2.from HADOOP_CONF_DIR 3.from HADOOP_HOME/conf 4.HADOOP_HOME/etc/hadoop.
hive-conf-dir	(none)	String	File directory of the hive-site.xml , used to create HiveMetastoreClient and security authentication, such as Kerberos, LDAP, Ranger and so on. If not configured, try to load from 'HIVE_CONF_DIR' env.
location-in-properties	false	Boolean	Setting the location in properties of hive table/database. If you don't want to access the location by the filesystem of hive when using a object storage such as s3,oss you can set this option to true.

JdbcCatalogOptions #

Options for Jdbc catalog.

Key	Default	Type	Description
catalog-key	"jdbc"	String	Custom jdbc catalog store key.
lock-key-max-length	255	Integer	Set the maximum length of the lock key. The 'lock-key' is composed of concatenating three fields : 'catalog-key', 'database', and 'table'.

FlinkCatalogOptions #

Flink catalog options for paimon.

Key	Default	Type	Description
default-database	"default"	String
disable-create-table-in-default-db	false	Boolean	If true, creating table in default database is not allowed. Default is false.

FlinkConnectorOptions #

Flink connector options for paimon.

Key	Default	Type	Description
changelog.precommit-compact	false	Boolean	If true, it will add a changelog compact coordinator and worker operator after the writer operator,in order to compact several changelog files from the same partition into large ones, which can decrease the number of small files.
end-input.watermark	(none)	Long	Optional endInput watermark used in case of batch mode or bounded stream.
lookup.async	false	Boolean	Whether to enable async lookup join.
lookup.async-thread-number	16	Integer	The thread number for lookup async.
lookup.bootstrap-parallelism	4	Integer	The parallelism for bootstrap in a single task for lookup join.
lookup.cache	AUTO	Enum	The cache mode of lookup join. Possible values: "AUTO" "FULL"
lookup.dynamic-partition	(none)	String	Specific dynamic partition for lookup, only support 'max_pt()' currently.
lookup.dynamic-partition.refresh-interval	1 h	Duration	Specific dynamic partition refresh interval for lookup, scan all partitions and obtain corresponding partition.
lookup.refresh.async	false	Boolean	Whether to refresh lookup table in an async thread.
lookup.refresh.async.pending-snapshot-count	5	Integer	If the pending snapshot count exceeds the threshold, lookup operator will refresh the table in sync.
lookup.refresh.time-periods-blacklist	(none)	String	The blacklist contains several time periods. During these time periods, the lookup table's cache refreshing is forbidden. Blacklist format is start1->end1,start2->end2,... , and the time format is yyyy-MM-dd HH:mm. Only used when lookup table is FULL cache mode.
partition.idle-time-to-done	(none)	Duration	Set a time duration when a partition has no new data after this time duration, mark the done status to indicate that the data is ready.
partition.idle-time-to-report-statistic	1 h	Duration	Set a time duration when a partition has no new data after this time duration, start to report the partition statistics to hms.
partition.time-interval	(none)	Duration	You can specify time interval for partition, for example, daily partition is '1 d', hourly partition is '1 h'.
scan.infer-parallelism	true	Boolean	If it is false, parallelism of source are set by global parallelism. Otherwise, source parallelism is inferred from splits number (batch mode) or bucket number(streaming mode).
scan.infer-parallelism.max	1024	Integer	If scan.infer-parallelism is true, limit the parallelism of source through this option.
scan.parallelism	(none)	Integer	Define a custom parallelism for the scan source. By default, if this option is not defined, the planner will derive the parallelism for each statement individually by also considering the global configuration. If user enable the scan.infer-parallelism, the planner will derive the parallelism by inferred parallelism.
scan.remove-normalize	false	Boolean	Whether to force the removal of the normalize node when streaming read. Note: This is dangerous and is likely to cause data errors if downstream is used to calculate aggregation and the input is not complete changelog.
scan.split-enumerator.batch-size	10	Integer	How many splits should assign to subtask per batch in StaticFileStoreSplitEnumerator to avoid exceed `akka.framesize` limit.
scan.split-enumerator.mode	fair	Enum	The mode used by StaticFileStoreSplitEnumerator to assign splits. Possible values: "fair": Distribute splits evenly when batch reading to prevent a few tasks from reading all. "preemptive": Distribute splits preemptively according to the consumption speed of the task.
scan.watermark.alignment.group	(none)	String	A group of sources to align watermarks.
scan.watermark.alignment.max-drift	(none)	Duration	Maximal drift to align watermarks, before we pause consuming from the source/task/partition.
scan.watermark.alignment.update-interval	1 s	Duration	How often tasks should notify coordinator about the current watermark and how often the coordinator should announce the maximal aligned watermark.
scan.watermark.emit.strategy	on-event	Enum	Emit strategy for watermark generation. Possible values: "on-periodic": Emit watermark periodically, interval is controlled by Flink 'pipeline.auto-watermark-interval'. "on-event": Emit watermark per record.
scan.watermark.idle-timeout	(none)	Duration	If no records flow in a partition of a stream for that amount of time, then that partition is considered "idle" and will not hold back the progress of watermarks in downstream operators.
sink.clustering.by-columns	(none)	String	Specifies the column name(s) used for comparison during range partitioning, in the format 'columnName1,columnName2'. If not set or set to an empty string, it indicates that the range partitioning feature is not enabled. This option will be effective only for bucket unaware table without primary keys and batch execution mode.
sink.clustering.sample-factor	100	Integer	Specifies the sample factor. Let S represent the total number of samples, F represent the sample factor, and P represent the sink parallelism, then S=F×P. The minimum allowed sample factor is 20.
sink.clustering.sort-in-cluster	true	Boolean	Indicates whether to further sort data belonged to each sink task after range partitioning.
sink.clustering.strategy	"auto"	String	Specifies the comparison algorithm used for range partitioning, including 'zorder', 'hilbert', and 'order', corresponding to the z-order curve algorithm, hilbert curve algorithm, and basic type comparison algorithm, respectively. When not configured, it will automatically determine the algorithm based on the number of columns in 'sink.clustering.by-columns'. 'order' is used for 1 column, 'zorder' for less than 5 columns, and 'hilbert' for 5 or more columns.
sink.committer-cpu	1.0	Double	Sink committer cpu to control cpu cores of global committer.
sink.committer-memory	(none)	MemorySize	Sink committer memory to control heap memory of global committer.
sink.committer-operator-chaining	true	Boolean	Allow sink committer and writer operator to be chained together
sink.cross-partition.managed-memory	256 mb	MemorySize	Weight of managed memory for RocksDB in cross-partition update, Flink will compute the memory size according to the weight, the actual memory used depends on the running environment.
sink.managed.writer-buffer-memory	256 mb	MemorySize	Weight of writer buffer in managed memory, Flink will compute the memory size for writer according to the weight, the actual memory used depends on the running environment.
sink.operator-uid.suffix	(none)	String	Set the uid suffix for the writer, dynamic bucket assigner and committer operators. The uid format is ${UID_PREFIX}_${TABLE_NAME}_${USER_UID_SUFFIX}. If the uid suffix is not set, flink will automatically generate the operator uid, which may be incompatible when the topology changes.
sink.parallelism	(none)	Integer	Defines a custom parallelism for the sink. By default, if this option is not defined, the planner will derive the parallelism for each statement individually by also considering the global configuration.
sink.savepoint.auto-tag	false	Boolean	If true, a tag will be automatically created for the snapshot created by flink savepoint.
sink.use-managed-memory-allocator	false	Boolean	If true, flink sink will use managed memory for merge tree; otherwise, it will create an independent memory allocator.
source.checkpoint-align.enabled	false	Boolean	Whether to align the flink checkpoint with the snapshot of the paimon table, If true, a checkpoint will only be made if a snapshot is consumed.
source.checkpoint-align.timeout	30 s	Duration	If the new snapshot has not been generated when the checkpoint starts to trigger, the enumerator will block the checkpoint and wait for the new snapshot. Set the maximum waiting time to avoid infinite waiting, if timeout, the checkpoint will fail. Note that it should be set smaller than the checkpoint timeout.
source.operator-uid.suffix	(none)	String	Set the uid suffix for the source operators. After setting, the uid format is ${UID_PREFIX}_${TABLE_NAME}_${USER_UID_SUFFIX}. If the uid suffix is not set, flink will automatically generate the operator uid, which may be incompatible when the topology changes.
streaming-read.shuffle-bucket-with-partition	true	Boolean	Whether shuffle by partition and bucket when streaming read.
unaware-bucket.compaction.parallelism	(none)	Integer	Defines a custom parallelism for the unaware-bucket table compaction job. By default, if this option is not defined, the planner will derive the parallelism for each statement individually by also considering the global configuration.

SparkCatalogOptions #

Spark catalog options for paimon.

Key	Default	Type	Description
catalog.create-underlying-session-catalog	false	Boolean	If true, create and use an underlying session catalog instead of default session catalog when use SparkGenericCatalog.
defaultDatabase	"default"	String	The default database name.

SparkConnectorOptions #

Spark connector options for paimon.

Key	Default	Type	Description
read.changelog	false	Boolean	Whether to read row in the form of changelog (add rowkind column in row to represent its change type).
read.stream.maxBytesPerTrigger	(none)	Long	The maximum number of bytes returned in a single batch.
read.stream.maxFilesPerTrigger	(none)	Integer	The maximum number of files returned in a single batch.
read.stream.maxRowsPerTrigger	(none)	Long	The maximum number of rows returned in a single batch.
read.stream.maxTriggerDelayMs	(none)	Long	The maximum delay between two adjacent batches, which used to create MinRowsReadLimit with read.stream.minRowsPerTrigger together.
read.stream.minRowsPerTrigger	(none)	Long	The minimum number of rows returned in a single batch, which used to create MinRowsReadLimit with read.stream.maxTriggerDelayMs together.
write.merge-schema	false	Boolean	If true, merge the data schema and the table schema automatically before write data.
write.merge-schema.explicit-cast	false	Boolean	If true, allow to merge data types if the two types meet the rules for explicit casting.

ORC Options #

Key	Default	Type	Description
orc.column.encoding.direct	(none)	Integer	Comma-separated list of fields for which dictionary encoding is to be skipped in orc.
orc.dictionary.key.threshold	0.8	Double	If the number of distinct keys in a dictionary is greater than this fraction of the total number of non-null rows, turn off dictionary encoding in orc. Use 0 to always disable dictionary encoding. Use 1 to always use dictionary encoding.

RocksDB Options #

The following options allow users to finely adjust RocksDB for better performance. You can either specify them in table properties or in dynamic table hints.

Key	Default	Type	Description
lookup.cache-rows	10000	Long	The maximum number of rows to store in the cache.
lookup.continuous.discovery-interval	(none)	Duration	The discovery interval of lookup continuous reading. This is used as an SQL hint. If it's not configured, the lookup function will fallback to 'continuous.discovery-interval'.
rocksdb.block.blocksize	4 kb	MemorySize	The approximate size (in bytes) of user data packed per block. The default blocksize is '4KB'.
rocksdb.block.cache-size	128 mb	MemorySize	The amount of the cache for data blocks in RocksDB.
rocksdb.block.metadata-blocksize	4 kb	MemorySize	Approximate size of partitioned metadata packed per block. Currently applied to indexes block when partitioned index/filters option is enabled. The default blocksize is '4KB'.
rocksdb.bloom-filter.bits-per-key	10.0	Double	Bits per key that bloom filter will use, this only take effect when bloom filter is used. The default value is 10.0.
rocksdb.bloom-filter.block-based-mode	false	Boolean	If true, RocksDB will use block-based filter instead of full filter, this only take effect when bloom filter is used. The default value is 'false'.
rocksdb.compaction.level.max-size-level-base	256 mb	MemorySize	The upper-bound of the total size of level base files in bytes. The default value is '256MB'.
rocksdb.compaction.level.target-file-size-base	64 mb	MemorySize	The target file size for compaction, which determines a level-1 file size. The default value is '64MB'.
rocksdb.compaction.level.use-dynamic-size	false	Boolean	If true, RocksDB will pick target size of each level dynamically. From an empty DB, RocksDB would make last level the base level, which means merging L0 data into the last level, until it exceeds max_bytes_for_level_base. And then repeat this process for second last level and so on. The default value is 'false'. For more information, please refer to RocksDB's doc.
rocksdb.compaction.style	LEVEL	Enum	The specified compaction style for DB. Candidate compaction style is LEVEL, FIFO, UNIVERSAL or NONE, and Flink chooses 'LEVEL' as default style. Possible values: "LEVEL" "UNIVERSAL" "FIFO" "NONE"
rocksdb.compression.type	LZ4_COMPRESSION	Enum	The compression type. Possible values: "NO_COMPRESSION" "SNAPPY_COMPRESSION" "ZLIB_COMPRESSION" "BZLIB2_COMPRESSION" "LZ4_COMPRESSION" "LZ4HC_COMPRESSION" "XPRESS_COMPRESSION" "ZSTD_COMPRESSION" "DISABLE_COMPRESSION_OPTION"
rocksdb.files.open	-1	Integer	The maximum number of open files (per stateful operator) that can be used by the DB, '-1' means no limit. The default value is '-1'.
rocksdb.thread.num	2	Integer	The maximum number of concurrent background flush and compaction jobs (per stateful operator). The default value is '2'.
rocksdb.use-bloom-filter	false	Boolean	If true, every newly created SST file will contain a Bloom filter. It is disabled by default.
rocksdb.writebuffer.count	2	Integer	The maximum number of write buffers that are built up in memory. The default value is '2'.
rocksdb.writebuffer.number-to-merge	1	Integer	The minimum number of write buffers that will be merged together before writing to storage. The default value is '1'.
rocksdb.writebuffer.size	64 mb	MemorySize	The amount of data built up in memory (backed by an unsorted log on disk) before converting to a sorted on-disk files. The default writebuffer size is '64MB'.

Configuration #

CoreOptions #

async-file-write

auto-create

branch

bucket

bucket-key

cache-page-size

changelog-file.prefix

changelog-producer

changelog-producer.row-deduplicate

changelog-producer.row-deduplicate-ignore-fields

changelog.num-retained.max

changelog.num-retained.min

changelog.time-retained

commit.callback.#.param

commit.callbacks

commit.force-compact

commit.force-create-snapshot

commit.max-retries

commit.user-prefix

compaction.max-size-amplification-percent

compaction.max.file-num

compaction.min.file-num

compaction.optimization-interval

compaction.size-ratio

consumer-id

consumer.expiration-time

consumer.ignore-progress

consumer.mode

continuous.discovery-interval

cross-partition-upsert.bootstrap-parallelism

cross-partition-upsert.index-ttl

data-file.prefix

delete-file.thread-num

delete.force-produce-changelog

deletion-vector.index-file.target-size

deletion-vectors.enabled

dynamic-bucket.assigner-parallelism

dynamic-bucket.initial-buckets

dynamic-bucket.target-row-num

dynamic-partition-overwrite

end-input.check-partition-expire

fields.default-aggregate-function

file-index.in-manifest-threshold

file-index.read.enabled

file-reader-async-threshold

file.block-size

file.compression

file.compression.per.level

file.compression.zstd-level

file.format

file.format.per.level

file.suffix.include.compression

force-lookup

full-compaction.delta-commits

ignore-delete

incremental-between

incremental-between-scan-mode

incremental-between-timestamp

local-merge-buffer-size

local-sort.max-num-file-handles

lookup-wait

lookup.cache-file-retention

lookup.cache-max-disk-size

lookup.cache-max-memory-size

lookup.cache-spill-compression

lookup.cache.bloom.filter.enabled

lookup.cache.bloom.filter.fpp

lookup.cache.high-priority-pool-ratio

lookup.hash-load-factor

lookup.local-file-type

manifest.compression

manifest.format

manifest.full-compaction-threshold-size

manifest.merge-min-count

manifest.target-file-size

merge-engine

metadata.stats-dense-store

metadata.stats-mode