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From "Lars Hofhansl (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-5333) Introduce Memstore "backpressure" for writes
Date Sat, 04 Feb 2012 01:05:53 GMT
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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