cassandra使用

常用命令

查看压缩转态：

bin/nodetool compactionstats

bin/nodetool disableautocompaction 可以禁用 compact，bin/nodetool enableautocompaction 启用

参数配置

使用时候注意参数设置

alter table titan_20190104.edgestore with compaction = {‘class’: ‘org.apache.cassandra.db.compaction.LeveledCompactionStrategy’, ‘sstable_size_in_mb’: 512}; alter table titan_20190104.edgestore with compression = {‘chunk_length_in_kb’: ‘1024’, ‘class’: ‘org.apache.cassandra.io.compress.LZ4Compressor’}; alter table titan_20190104.edgestore with gc_grace_seconds = 259200;