HBase Canary

HBase  Canary 用于检测HBase 系统的状态。它对指定表的每一个region 抓取一行,来探测失败或者延迟。

    hbase org.apache.hadoop.hbase.tool.Canary -help
Usage: bin/hbase org.apache.hadoop.hbase.tool.Canary [opts] [table1 [table2]...] | [regionserver1 [regionserver2]..]
where [opts] are:
-help Show this help and exit.
-regionserver replace the table argument to regionserver,
which means to enable regionserver mode
-daemon Continuous check at defined intervals.
-interval <N> Interval between checks (sec)
-e Use region/regionserver as regular expression
which means the region/regionserver is regular expression pattern
-f <B> stop whole program if first error occurs, default is true
-t <N> timeout for a check, default is 600000 (milisecs)

(1)检测每一个表的每一个region的每一个列簇。

hbase  org.apache.hadoop.hbase.tool.Canary

(2)检测指定表的每一个region的每一个列簇,表之间用空格分开

hbase orghapache.hadoop.hbase.tool.Canary test-01 test-02

(3)检测regionserver

hbase orghapache.hadoop.hbase.tool.Canary  -regionserver

(4)正则表达式检测

hbase orghapache.hadoop.hbase.tool.Canary  -e test-0[1-2]

(5)以daemon模式运行

hbase orghapache.hadoop.hbase.tool.Canary -daemon

时间间隔为50000毫秒,出现错误不会停止

      hbase orghapache.hadoop.hbase.tool.Canary -daemon -interval 50000 -f false

(6)指定超时

hbase orghapache.hadoop.hbase.tool.Canary -daemon  -t 6000000

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