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From aaron morton <>
Subject Re: How to monitor progress of nodetool repair?
Date Wed, 03 Aug 2011 22:28:30 GMT
Repair has two phases.

The first phase involves calculating the differences (the Merkel trees). You can monitor this
via nodetool compactionstats, you should see a Validation compaction reported. 

The second phase is streaming data around, nodetool netstats will show you the progress there.


Aaron Morton
Freelance Cassandra Developer

On 4 Aug 2011, at 03:47, Gary Ogasawara wrote:

> Running v0.8.2, I can't see how to monitor the status/progress of a nodetool
> repair. Any advice?
> The nodetool repair command from the command line is not returning, so I
> assume it's still running.  But there's little CPU or disk activity.
> Using jconsole to look at the AntiEntropyStage attributes, the
> CompletedTasks has a non-zero value, but all the other attributes like
> ActiveCount, PendingTasks, CurrentlyBlockedTasks are at 0. 
> nodetool tpstats reports 0 for active, pending, blocked for all attributes
> nodetool netstats has a few pending tasks occasionally, and the completed
> tasks are going up.
> system.log at INFO level has the initial "Sending AEService tree" message,
> but nothing else.
> -gary

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