This topic introduces the data coordinator-related configurations of Milvus.
Data coordinator (data coord) manages the topology of data nodes, maintains metadata, and triggers flush, compact, and other background data operations.
Under this section, you can configure data coord address, segment settings, compaction, garbage collection, etc.
dataCoord.address
Description
Default Value
TCP/IP address of data coordinator.
Data coordinator monitors all IPv4 addresses if this parameter is set as 0.0.0.0.
localhost
dataCoord.port
Description
Default Value
TCP port of data coordinator.
13333
dataCoord.grpc.serverMaxRecvSize
Description
Default Value
The maximum size of each RPC request that the data coord can receive.
Unit: Byte
2147483647
dataCoord.grpc.serverMaxSendSize
Description
Default Value
The maximum size of each respond the data coord can send when receiving an RPC request.
Unit: Byte
2147483647
dataCoord.grpc.clientMaxRecvSize
Description
Default Value
The maximum size of each respond that the data coord can receive when sending an RPC request.
Unit: Byte
104857600
dataCoord.grpc.clientMaxSendSize
Description
Default Value
The maximum size of each RPC request that the data coord can send.
Unit: Byte
104857600
dataCoord.enableCompaction
Description
Default Value
Switch value to control if to enable segment compaction.
Compaction merges small-size segments into a large segment, and clears the entities deleted beyond the rentention duration of Time Travel.
true
dataCoord.enableGarbageCollection
Description
Default Value
Switch value to control if to enable garbage collection to clear the discarded data in MinIO or S3 service.
false
dataCoord.segment.maxSize
Description
Default Value
The maximum size of a segment.
Unit: MB
datacoord.segment.maxSize and datacoord.segment.sealProportion together determine if a segment can be sealed.
512
dataCoord.segment.sealProportion
Description
Default Value
The minimum proportion to datacoord.segment.maxSize to seal a segment.
datacoord.segment.maxSize and datacoord.segment.sealProportion together determine if a segment can be sealed.
0.75
dataCoord.segment.assignmentExpiration
Description
Default Value
Expiration time of the segment assignment.
Unit: ms
2000
dataCoord.compaction.enableAutoCompaction
Description
Default Value
Switch value to control if to enable automatic segment compaction during which data coord locates and merges compactable segments in the background.
This configuration takes effect only when dataCoord.enableCompaction is set as true.
true
dataCoord.gc.interval
Description
Default Value
The interval at which data coord performs garbage collection.
Unit: Second
This configuration takes effect only when dataCoord.enableGarbageCollection is set as true.
3600
dataCoord.gc.missingTolerance
Description
Default Value
The retention duration of the unrecorded binary log (binlog) files.
Setting a reasonably large value for this parameter avoids erroneously deleting the newly created binlog files that lack metadata.
Unit: Second
This configuration takes effect only when dataCoord.enableGarbageCollection is set as true.
86400
dataCoord.gc.dropTolerance
Description
Default Value
The retention duration of the binlog files of the deleted segments before they are cleared.
Unit: Second
This configuration takes effect only when dataCoord.enableGarbageCollection is set as true.
