HBase hbck——检查HBase集群的一致性
/** * Cache of what we found in zookeeper so we don't have to go to zk ensemble * for every query. Synchronize access rather than use concurrent Map because * synchronization needs to span query of zk. */ private final Map<String, TableState> cache = new HashMap<String, TableState>(); this.cache.put(tableName, state);
? ? ? ? ? ? ? 把ZK中的数据缓存在本地内存中，以加速访问，减少访问时间。
? ? ? ? ? ? ? 为了让本地内存中的数据失效，必须重启HBase集群。
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? ? ? ? ? ? ? 重启HBase集群。
? ? ? ? ? ? ? 此时，create 'usertable','f1'，没有提示错误，表创建成功。
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[bigdata@tbe192168147015 ~]$ hbase hbck -hUsage: fsck [opts] {only tables} where [opts] are: -help Display help options (this) -details Display full report of all regions. -timelag {timeInSeconds} Process only regions that have not experienced any metadata updates in the last {{timeInSeconds} seconds. -sleepBeforeRerun {timeInSeconds} Sleep this many seconds before checking if the fix worked if run with -fix -summary Print only summary of the tables and status. -metaonly Only check the state of ROOT and META tables. Repair options: (expert features, use with caution!) -fix Try to fix region assignments. This is for backwards compatiblity -fixAssignments Try to fix region assignments. Replaces the old -fix -fixMeta Try to fix meta problems. This assumes HDFS region info is good. -fixHdfsHoles Try to fix region holes in hdfs. -fixHdfsOrphans Try to fix region dirs with no .regioninfo file in hdfs -fixHdfsOverlaps Try to fix region overlaps in hdfs. -fixVersionFile Try to fix missing hbase.version file in hdfs. -maxMerge <n> When fixing region overlaps, allow at most <n> regions to merge. (n=5 by default) -sidelineBigOverlaps When fixing region overlaps, allow to sideline big overlaps -maxOverlapsToSideline <n> When fixing region overlaps, allow at most <n> regions to sideline per group. (n=2 by default) -repair Shortcut for -fixAssignments -fixMeta -fixHdfsHoles -fixHdfsOrphans -fixHdfsOverlaps -fixVersionFile -sidelineBigOverlaps -repairHoles Shortcut for -fixAssignments -fixMeta -fixHdfsHoles -fixHdfsOrphans?
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