Cassandra
CQL
- 列出所有的 Keyspace
cqlsh> DESCRIBE keyspaces;
- 備份 A.A.A.A 整個 Cassandra 的 Schema
root@cqlsh:~# cqlsh -e "DESC SCHEMA" A.A.A.A > /tmp/db_schema.cql
- 還原整個 Cassandra 的 Schema 到另一台 B.B.B.B 新的機器
root@cqlsh:~# cqlsh B.B.B.B cqlsh> source '/tmp/db_schema.cql'
- 查詢 Replication Factor
cqlsh> SELECT keyspace_name,strategy_options FROM system.schema_keyspaces; keyspace_name | strategy_options ---------------+---------------------------- system_traces | {"replication_factor":"2"}
nodetool
- 查詢叢集節點狀態
~$ nodetool status
- 強制移除故障節點
~$ nodetool removenode <HOST_ID>
Last modified 7 years ago
Last modified on Jan 24, 2018, 12:22:10 PM