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HBase, mail # user - flushing + compactions after config change


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Re: 答复: flushing + compactions after config change
Viral Bajaria 2013-06-27, 08:29
Thanks Liang!

Found the logs. I had gone overboard with my grep's and missed the "Too
many hlogs" line for the regions that I was trying to debug.

A few sample log lines:

2013-06-27 07:42:49,602 INFO org.apache.hadoop.hbase.regionserver.wal.HLog:
Too many hlogs: logs=33, maxlogs=32; forcing flush of 2 regions(s):
0e940167482d42f1999b29a023c7c18a, 3f486a879418257f053aa75ba5b69b14
2013-06-27 08:10:29,996 INFO org.apache.hadoop.hbase.regionserver.wal.HLog:
Too many hlogs: logs=33, maxlogs=32; forcing flush of 1 regions(s):
0e940167482d42f1999b29a023c7c18a
2013-06-27 08:17:44,719 INFO org.apache.hadoop.hbase.regionserver.wal.HLog:
Too many hlogs: logs=33, maxlogs=32; forcing flush of 2 regions(s):
0e940167482d42f1999b29a023c7c18a, e380fd8a7174d34feb903baa97564e08
2013-06-27 08:23:45,357 INFO org.apache.hadoop.hbase.regionserver.wal.HLog:
Too many hlogs: logs=33, maxlogs=32; forcing flush of 3 regions(s):
0e940167482d42f1999b29a023c7c18a, 3f486a879418257f053aa75ba5b69b14,
e380fd8a7174d34feb903baa97564e08

Any pointers on what's the best practice for avoiding this scenario ?

Thanks,
Viral

On Thu, Jun 27, 2013 at 1:21 AM, 谢良 <[EMAIL PROTECTED]> wrote:

> If  reached memstore global up-limit,  you'll find "Blocking updates on"
> in your files(see MemStoreFlusher.reclaimMemStoreMemory);
> If  it's caused by too many log files, you'll find "Too many hlogs:
> logs="(see HLog.cleanOldLogs)
> Hope it's helpful for you:)
>
> Best,
> Liang
>