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Date: Tue, 12 Mar 2013 11:46:51 -0600
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Subject: commitlog -deleted keyspaces.
From: a k <kumaramit.extra@gmail.com>
To: user@cassandra.apache.org
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We are running a 4 node cluster version 1.1.0 and our commit logs seem to
be ever growing. We have a total about 250 GB per node in the
keyspaces/column families and the commit logs are at about 30 GB.There have
been several deletions of keyspaces in our setup and I am concerned about a
few things.

First being the size of the commit logs, we have not modified the
"commitlog_total_space_in_mb" in yaml so I assume it is the default
4092MB, We don't have "memtable_flush_after_mins" setting either.

Is this sane? Why would the size of the commit logs be so large (I am
worried about the startup time, when it has to replay the commit logs) and
why would the default size of 4092 MB not be enforced.

Would it cause us trouble when we upgrade to 1.2?

Another thing I have noticed is that upon restarts, the old keyspaces that
were deleted re-appear although with less data, I would imagine that has
nothing to do with the commit logs.

Can I safely delete the commitlogs after the nodetool flush?


Many thanks
Amit

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We are running a 4 node cluster version 1.1.0 and our commit logs seem to b=
e ever growing. We have a total about 250 GB per node in the keyspaces/colu=
mn families and the commit logs are at about 30 GB.There have been several =
deletions of keyspaces in our setup and I am concerned about a few things.<=
br>
<br>First being the size of the commit logs, we have not modified the=A0 &q=
uot;commitlog_total_space_in_mb&quot; in yaml so I assume it is the default=
=A0=A0 4092MB, We don&#39;t have &quot;memtable_flush_after_mins&quot; sett=
ing either.<br>
<br>Is this sane? Why would the size of the commit logs be so large (I am w=
orried about the startup time, when it has to replay the commit logs) and w=
hy would the default size of 4092 MB not be enforced.<br><br>Would it cause=
 us trouble when we upgrade to 1.2?<br>
<br>Another thing I have noticed is that upon restarts, the old keyspaces t=
hat were deleted re-appear although with less data, I would imagine that ha=
s nothing to do with the commit logs.<br><br>Can I safely delete the commit=
logs after the nodetool flush?<br>
<br><br><br>Many thanks<br>Amit<br><br>

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