getQuerySegmentInfo()

This operation gets information about persistent segments of a collection from the query nodes, including the number of entities.

Java

public GetQuerySegmentInfoResp getQuerySegmentInfo(GetQuerySegmentInfoReq request)

Request Parameters

Java

getQuerySegmentInfo(GetQuerySegmentInfoReq.builder()
    .collectionName(String collectionName)
    .build()
)

BUILDER METHODS:

• collectionName(String collectionName)

  The name of the target collection.

RETURN TYPE:

GetQuerySegmentInfoResp

RETURNS:

A GetQuerySegmentInfoResp object that contains detailed information about the persisted segments in the specified collection, including the number of entities in each of these segments. The object has the following parameters:

• segmentInfos (List<PersistentSegmentInfo>) -

  A list of segments, each represented by a PersistentSegmentInfo object, which has the following fields

  • segmentID (Long) -

    The ID of the current segment.

  • collectionID (Long) -

    The ID of the collection to which the current segment belongs.

  • partitionID (Long) -

    The ID of the partition to which the current segment belongs.

  • memSize (Long) -

    The size that the current segment takes up in memory.

  • numOfRows (Long) -

    The number of entities in the current segment.

  • indexName (String) -

    The name of the index that is related to the current segment.

  • indexID (Long) -

    The ID of the index that is related to the current segment.

  • state (String) -

    The state of the current segment. Possible values are: "Growing", "Sealed", "Flushed", "Flushing", "Dropped", "Importing".

  • level (String) -

    The compaction level of the current segment. Possible values are : "Legacy", "L0", "L1", "L2".

  • nodeIDs (List<Long>) -

    A list of query node IDs.

  • isSorted (Boolean) -

    Whether the entities in the current segment are sorted.

EXCEPTIONS:

• MilvusClientExceptions

  This exception will be raised when any error occurs during this operation.

Example

Java

import io.milvus.v2.client.ConnectConfig;
import io.milvus.v2.client.MilvusClientV2;
import io.milvus.v2.service.utility.request.GetQuerySegmentInfoReq;
import io.milvus.v2.service.utility.response.GetQuerySegmentInfoResp;

// 1. Set up a client
ConnectConfig connectConfig = ConnectConfig.builder()
        .uri("http://localhost:19530")
        .token("root:Milvus")
        .build();

MilvusClientV2 client = new MilvusClientV2(connectConfig);

// 2. Get segment info
GetQuerySegmentInfoResp segInfoResp = client.getQuerySegmentInfo(GetQuerySegmentInfoReq.builder()
        .collectionName("test")
        .build());