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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1058) Prevent runaway compactions
Date Sun, 18 Jan 2009 05:50:59 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12664927#action_12664927
] 

stack commented on HBASE-1058:
------------------------------

You can overrun a cluster by running a PE upload into a small cluster.  Do './bin/hadoop ......PerformanceEvaluation
sequentialWrite 256' ... i.e. try loading 1/4 billion items.  Trying this I produced a region
with 1k flush files to compact.  It won't recover, not inside 1G of heap.   Just OOMEs.

> Prevent runaway compactions
> ---------------------------
>
>                 Key: HBASE-1058
>                 URL: https://issues.apache.org/jira/browse/HBASE-1058
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: stack
>
> A rabid upload will easily outrun our compaction ability dropping flushes faster than
we can compact them up.  Fix.

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