FastDFS常用命令总结

Posted 2023-04-05

参考技术A 1、启动FastDFS

tracker: /usr/local/bin/fdfs_trackered %FastDFS%/tracker.conf
storage: /usr/local/bin/fdfs_storaged %FastDFS%/storage.conf

也可以简写为：

tracker: fdfs_trackered %FastDFS%/tracker.conf
storage: fdfs_storaged %FastDFS%/storage.conf

其中的%FastDFS%指的是FastDFS的所在目录，根据自己的情况进行替换即可。

2、关闭FastDFS

tracker: /usr/local/bin/stop.sh fdfs_tracker
storage: /usr/local/bin/stop.sh fdfs_storage

或者

killall fdfs_trackered
killall fdfs_storaged

注意，千万不要使用kill-9强行杀死进程。

3、重启FastDFS

tracker: /usr/local/bin/restart.sh fdfs_trackered
storage: /usr/local/bin/restart.sh fdfs_storaged

4、查看集群情况

在任意一台storage(tracker也可以)

/usr/local/bin/fdfs_monitor %FastDFS%/storage.conf

5、删除一个storage

在任意一台storage(tracker也可以)

/usr/local/bin/fdfs_monitor %FastDFS%/storage.conf delete group2 20.12.1.73

6、测试上传

fdfs_test /etc/fdfs/client.conf upload test.txt

es 常用命令总结

参考技术A fielddata是全加载进入内存，主要用处在排序和聚合字段
fielddata与doc values区别：
4.1 相同点

4.2 不同点

fielddata: 内存存储；doc_values: OS Cache+磁盘存储

fielddata: 对应的字段类型是text; doc_values：对应的字段类型是keyword

field_data主要针对的是分词字段；doc_values针对大是不分词字段

fielddata默认不开启；doc_values默认是开启

7 bm2.5文档 The Probabilistic Relevance Framework: BM25 and Beyond.
https://blog.mimacom.com/bm25-got/

GET _tasks?detailed=true&actions=*indices:data/read/search

POST _tasks/CdoilmnzRVyllc0PbRbB2w:7280/_cancel

16 查看节点所占内存
/_cat/nodes?v&format=json&h=ip,port,v,m,fdp,mc,mcs,sc,sm,qcm,fm,im,siwm,svmm

获取二进制的head dump文件 jmap -dump:format=b,file=/tmp/es_heap.bin <pid> 其中pid是ES JAVA进程的进程号。

PUT /索引名称/_settings

"index.search.slowlog.threshold.query.warn": "1s",
"index.search.slowlog.threshold.query.info": "500ms",
"index.search.slowlog.threshold.query.debug": "300ms",
"index.search.slowlog.threshold.query.trace": "100ms",
"index.search.slowlog.threshold.fetch.warn": "1s",
"index.search.slowlog.threshold.fetch.info": "500ms",
"index.search.slowlog.threshold.fetch.debug": "300ms",
"index.search.slowlog.threshold.fetch.trace": "100ms",
"index.search.slowlog.level": "info"