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Posted to issues@hbase.apache.org by "Nicolas Spiegelberg (JIRA)" <ji...@apache.org> on 2010/09/16 21:51:32 UTC
[jira] Created: (HBASE-3007) StoreFile Blooms are Being Stored
Undersized
StoreFile Blooms are Being Stored Undersized
--------------------------------------------
Key: HBASE-3007
URL: https://issues.apache.org/jira/browse/HBASE-3007
Project: HBase
Issue Type: Bug
Components: regionserver
Affects Versions: 0.89.20100621
Reporter: Nicolas Spiegelberg
Assignee: Nicolas Spiegelberg
Priority: Minor
While looking through error logs today, I noticed the following line.
{code}
2010-09-16 04:12:26,401 INFO org.apache.hadoop.hbase.regionserver.StoreFile: Bloom added to HFile. 9600B, 10292/6933 (148%)
{code}
The last 3 numbers are: # of keys in bloom, # of keys preallocated for bloom, % full. The last number should never be > 100%. Oversized blooms will cause increased false positives. Note that this occurred on a Row+Col bloom. Will provide more details after further instrumentation.
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[jira] Commented: (HBASE-3007) StoreFile Blooms are Being Stored
Undersized
Posted by "Nicolas Spiegelberg (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-3007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12910341#action_12910341 ]
Nicolas Spiegelberg commented on HBASE-3007:
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All instances of over-sizing happen during compactions. One particularly egregious one...
{code}
2010-09-16 11:38:51,066 INFO org.apache.hadoop.hbase.regionserver.Store: Started compaction of 4 file(s) in Actions of dev,55555550,1284591819438.6774c3a858b607148c92469d0c850bef. into hdfs://snc4.facebook.com:9000/SNC4-HBASE/ev/6774c3a858b607148c92469d0c850bef/.tmp, seqid=1837996
2010-09-16 11:38:51,242 INFO org.apache.hadoop.hbase.regionserver.StoreFile: Bloom added to HFile. 256B, 3020/156 (1,936%)
{code}
> StoreFile Blooms are Being Stored Undersized
> --------------------------------------------
>
> Key: HBASE-3007
> URL: https://issues.apache.org/jira/browse/HBASE-3007
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 0.89.20100621
> Reporter: Nicolas Spiegelberg
> Assignee: Nicolas Spiegelberg
> Priority: Minor
>
> While looking through error logs today, I noticed the following line.
> {code}
> 2010-09-16 04:12:26,401 INFO org.apache.hadoop.hbase.regionserver.StoreFile: Bloom added to HFile. 9600B, 10292/6933 (148%)
> {code}
> The last 3 numbers are: # of keys in bloom, # of keys preallocated for bloom, % full. The last number should never be > 100%. Oversized blooms will cause increased false positives. Note that this occurred on a Row+Col bloom. Will provide more details after further instrumentation.
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