如何加快Elasticsearch重新索引操作？

Question

我们是否可以通过将副本设置为零并增加刷新间隔来加快Elasticsearch（v 5.3）的重新索引操作，还是在内部进行了处理？

Answer 1

In order to improve indexing speed you can use the following:

• Use bulk requests
• Use multiple workers/threads to send data to Elasticsearch
• Increase the refresh interval
• Disable refresh and replicas for initial loads
• Use auto-generated ids
• Increase indexing buffer size

Related to you question - ElasticSearch is designed for continuous log processing that's why all these actions are not automatic. In case of bulk reindexings you have to change all these settings manually and restore them at the end:

• refresh interval for Lucene index writer
• replication factor for distributed processor
• index buffer size for merge scheduler