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From Robert Coli <>
Subject Re: stalled nodetool repair?
Date Thu, 21 Aug 2014 20:12:03 GMT
On Thu, Aug 21, 2014 at 12:32 PM, Kevin Burton <> wrote:

> How do I watch the progress of nodetool repair.

This is a very longstanding operational problem in Cassandra. Repair barely
works and is opaque, yet one is expected to run it once a week in the
default configuration.

An unreasonably-hostile-in-tone-but-otherwise-accurate description of the
status quo before the re-write of streaming in 2.0 :

A proposal to change the default for gc_grace_seconds to 34 days, so that
this fragile and heavyweight operation only has to be done once a month :

> granted , this is a lot of data, but it would be nice to at least see some
> progress.

Here's the rewrite of streaming, where progress indication improves
dramatically over the prior status quo :

And here's two open tickets on making repair less opaque (thx yukim@#cassandra)


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