Help Center> Cloud Search Service> User Guide> Enhanced Cluster Features> Enhanced Import Performance> Context
Updated on 2024-06-12 GMT+08:00
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Context

Feature Description

CSS provides enhanced data import function. It optimizes bulk route, and speeds up processing through indexes and word segmentation, improving import performance and reduces bulk rejection. This function applies to clusters that contain a large number of index shards and text indexes, and have high import throughput.

Prerequisites

An Elasticsearch cluster of version 7.10.2 or OpenSearch cluster has been created on the CSS console.

Constraints

  • Currently, only Elasticsearch clusters of version 7.10.2 and OpenSearch clusters of version 1.3.6 support the import performance enhancement.
  • After the local shard preferential bulk routing optimization and bulk routing optimization are enabled, data writing is not routed based on IDs, and routing-related functions are restricted. For example, ID-based GET requests may fail. The optimization of local shard preferential bulk routing depends on the random distribution of client bulk requests and the balanced distribution of primary shards.
  • The prerequisite for enabling index.native_analyzer is that the index.native_speed_up has been enabled.
  • The index.native_speed_up function cannot be enabled for indexes that contain the nested field.