Elasticsearch实战技巧引言本文整理了Elasticsearch开发和使用中的实战技巧和最佳实践。开发技巧1.1 Java客户端使用技巧/** * Java客户端优化 */ public class ClientOptimization { /** * 批量操作优化 */ public void bulkOperations(RestHighLevelClient client) throws IOException { BulkRequest bulkRequest new BulkRequest(); for (int i 0; i 1000; i) { IndexRequest request new IndexRequest(products) .id(product_ i) .source(Map.of( name, Product i, price, i * 10.0 ), XContentType.JSON); bulkRequest.add(request); } bulkRequest.setRefreshPolicy(WriteRequest.RefreshPolicy.NONE); BulkResponse response client.bulk(bulkRequest, RequestOptions.DEFAULT); if (response.hasErrors()) { for (BulkItemResponse item : response.getItems()) { if (item.isFailed()) { System.err.println(Error: item.getFailure().getReason()); } } } } }运维技巧2.1 常用运维命令# 查看集群状态 curl -X GET localhost:9200/_cluster/health?pretty # 查看节点状态 curl -X GET localhost:9200/_cat/nodes?v # 查看索引状态 curl -X GET localhost:9200/_cat/indices?v # 查看分片状态 curl -X GET localhost:9200/_cat/shards?v # 查看热线程 curl -X GET localhost:9200/_nodes/hot_threads2.2 故障排查/** * 常见问题排查 */ public class Troubleshooting { /** * 排查查询缓慢问题 */ public void diagnoseSlowQueries(RestHighLevelClient client) throws IOException { SearchRequest request new SearchRequest(); request.searchType(SearchType.QUERY_THEN_FETCH); SearchSourceBuilder source new SearchSourceBuilder(); source.profile(true); request.source(source); SearchResponse response client.search(request, RequestOptions.DEFAULT); for (String profile : response.getProfileResults().keySet()) { System.out.println(Shard: profile); } } }总结通过掌握这些实战技巧可以更高效地使用Elasticsearch提升开发和运维效率。
Elasticsearch实战技巧
Elasticsearch实战技巧引言本文整理了Elasticsearch开发和使用中的实战技巧和最佳实践。开发技巧1.1 Java客户端使用技巧/** * Java客户端优化 */ public class ClientOptimization { /** * 批量操作优化 */ public void bulkOperations(RestHighLevelClient client) throws IOException { BulkRequest bulkRequest new BulkRequest(); for (int i 0; i 1000; i) { IndexRequest request new IndexRequest(products) .id(product_ i) .source(Map.of( name, Product i, price, i * 10.0 ), XContentType.JSON); bulkRequest.add(request); } bulkRequest.setRefreshPolicy(WriteRequest.RefreshPolicy.NONE); BulkResponse response client.bulk(bulkRequest, RequestOptions.DEFAULT); if (response.hasErrors()) { for (BulkItemResponse item : response.getItems()) { if (item.isFailed()) { System.err.println(Error: item.getFailure().getReason()); } } } } }运维技巧2.1 常用运维命令# 查看集群状态 curl -X GET localhost:9200/_cluster/health?pretty # 查看节点状态 curl -X GET localhost:9200/_cat/nodes?v # 查看索引状态 curl -X GET localhost:9200/_cat/indices?v # 查看分片状态 curl -X GET localhost:9200/_cat/shards?v # 查看热线程 curl -X GET localhost:9200/_nodes/hot_threads2.2 故障排查/** * 常见问题排查 */ public class Troubleshooting { /** * 排查查询缓慢问题 */ public void diagnoseSlowQueries(RestHighLevelClient client) throws IOException { SearchRequest request new SearchRequest(); request.searchType(SearchType.QUERY_THEN_FETCH); SearchSourceBuilder source new SearchSourceBuilder(); source.profile(true); request.source(source); SearchResponse response client.search(request, RequestOptions.DEFAULT); for (String profile : response.getProfileResults().keySet()) { System.out.println(Shard: profile); } } }总结通过掌握这些实战技巧可以更高效地使用Elasticsearch提升开发和运维效率。
