cassandra版本:apache-cassandra-2.1.8
我最近配置了2个节点集群,Authenticator 设置为PasswordAuthenticator.当其中一个节点关闭时,我无法登录到Cqlsh并获得以下错误
Connection error: ('Unable to connect to any servers',
{'192.168.0.45': AuthenticationFailed(u'Failed to authenticate to 192.168.0.45: code=0100 [Bad credentials]
message="org.apache.cassandra.exceptions.UnavailableException: Cannot achieve consistency level QUORUM"',)})
system_auth RF设置为2,因为我有2个节点.
C:\apache-cassandra-2.1.8-bin\apache-cassandra-2.1.8\bin>nodetool status
Starting NodeTool
Datacenter: DC1
================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
-- Address Load Tokens Owns Host ID Rack
UN 192.168.0.45 327.87 KB 256 ? 66a97a0a-d69c-4daf-b0f5-55cb8442d728 RAC1
UN 192.168.0.46 234.28 KB 256 ? 432031fc-eea3-4b02-8d79-f877bbd8afaf RAC1
KeySpace RF
cassandra@cqlsh> select * from system.schema_keyspaces;
keyspace_name | durable_writes | strategy_class | strategy_options
---------------+----------------+---------------------------------------------+---------------------------- …最近我们插入了数百万条记录并从表中删除了数百万条记录,大小为10 GB的表被截断.
我们使用SizeTieredCompactionStrategy运行2个节点,当前CPU利用率为100%且待定压缩正在增加,当前待定压缩为293144
任何指针都可以降低CPU利用率并快速完成压缩.