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Posted to issues@hbase.apache.org by "Lars Hofhansl (Created) (JIRA)" <ji...@apache.org> on 2012/02/04 02:05:53 UTC
[jira] [Created] (HBASE-5333) Introduce Memstore "backpressure" for
writes
Introduce Memstore "backpressure" for writes
--------------------------------------------
Key: HBASE-5333
URL: https://issues.apache.org/jira/browse/HBASE-5333
Project: HBase
Issue Type: Improvement
Reporter: Lars Hofhansl
Currently if the memstore/flush/compaction cannot keep up with the writeload, we block writers up to hbase.hstore.blockingWaitTime milliseconds (default is 90000).
Would be nice if there was a concept of a soft "backpressure" that slows writing clients gracefully *before* we reach this condition.
>From the log:
"2012-02-04 00:00:06,963 WARN org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Region <table>,,1328313512779.c2761757621ddf8fb78baf5288d71271. has too many store files; delaying flush up to 90000ms"
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[jira] [Resolved] (HBASE-5333) Introduce Memstore "backpressure"
for writes
Posted by "Ian Varley (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-5333?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ian Varley resolved HBASE-5333.
-------------------------------
Resolution: Duplicate
> Introduce Memstore "backpressure" for writes
> --------------------------------------------
>
> Key: HBASE-5333
> URL: https://issues.apache.org/jira/browse/HBASE-5333
> Project: HBase
> Issue Type: Improvement
> Reporter: Lars Hofhansl
>
> Currently if the memstore/flush/compaction cannot keep up with the writeload, we block writers up to hbase.hstore.blockingWaitTime milliseconds (default is 90000).
> Would be nice if there was a concept of a soft "backpressure" that slows writing clients gracefully *before* we reach this condition.
> From the log:
> "2012-02-04 00:00:06,963 WARN org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Region <table>,,1328313512779.c2761757621ddf8fb78baf5288d71271. has too many store files; delaying flush up to 90000ms"
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[jira] [Commented] (HBASE-5333) Introduce Memstore "backpressure"
for writes
Posted by "Jean-Daniel Cryans (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-5333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13201880#comment-13201880 ]
Jean-Daniel Cryans commented on HBASE-5333:
-------------------------------------------
I've done some brainstorming with Stack and the result was HBASE-5162.
> Introduce Memstore "backpressure" for writes
> --------------------------------------------
>
> Key: HBASE-5333
> URL: https://issues.apache.org/jira/browse/HBASE-5333
> Project: HBase
> Issue Type: Improvement
> Reporter: Lars Hofhansl
>
> Currently if the memstore/flush/compaction cannot keep up with the writeload, we block writers up to hbase.hstore.blockingWaitTime milliseconds (default is 90000).
> Would be nice if there was a concept of a soft "backpressure" that slows writing clients gracefully *before* we reach this condition.
> From the log:
> "2012-02-04 00:00:06,963 WARN org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Region <table>,,1328313512779.c2761757621ddf8fb78baf5288d71271. has too many store files; delaying flush up to 90000ms"
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