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From: Nicolas Guyomar <nicolas.guyomar@gmail.com>
Date: Thu, 21 Sep 2017 10:02:16 +0200
Message-ID: <CAKGo1h29hkAx2Y3=q2_Ocgc8bBNV=gnaqmsctVqcjMKonWN2eQ@mail.gmail.com>
Subject: Re: Drastic increase in disk usage after starting repair on 3.7
To: user@cassandra.apache.org
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archived-at: Thu, 21 Sep 2017 08:02:43 -0000

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Hi Paul,

This might be a long shot, but some repairs might fail to clear their
snapshot (not sure if its still the case with C* 3.7 however, I had the
problem on 2.X branche).
What does nodetool listsnapshot indicate ?

On 21 September 2017 at 05:49, kurt greaves <kurt@instaclustr.com> wrote:

> repair does overstream by design, so if that node is inconsistent you'd
> expect a bit of an increase. if you've got a backlog of compactions that's
> probably due to repair and likely the cause of the increase. if you're
> really worried you can rolling restart to stop the repair, otherwise maybe
> try increasing compaction throughput.
>

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<div dir=3D"ltr">Hi Paul,<div><br></div><div>This might be a long shot, but=
 some repairs might fail to clear their snapshot (not sure if its still the=
 case with C* 3.7 however, I had the problem on 2.X branche).</div><div>Wha=
t does nodetool listsnapshot indicate ? =C2=A0<br></div></div><div class=3D=
"gmail_extra"><br><div class=3D"gmail_quote">On 21 September 2017 at 05:49,=
 kurt greaves <span dir=3D"ltr">&lt;<a href=3D"mailto:kurt@instaclustr.com"=
 target=3D"_blank">kurt@instaclustr.com</a>&gt;</span> wrote:<br><blockquot=
e class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc sol=
id;padding-left:1ex"><div dir=3D"auto">repair does overstream by design, so=
 if that node is inconsistent you&#39;d expect a bit of an increase. if you=
&#39;ve got a backlog of compactions that&#39;s probably due to repair and =
likely the cause of the increase. if you&#39;re really worried you can roll=
ing restart to stop the repair, otherwise maybe try increasing compaction t=
hroughput.</div>
</blockquote></div><br></div>

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