Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm
Precedence: bulk
Reply-To: user@cassandra.apache.org
MIME-Version: 1.0
In-Reply-To: <CADYwe76fUan9ESYGYX3ESZiTAKESZqfarGa8pPhQ8ZYOdsOEGA@mail.gmail.com>
References: <CADYwe76fUan9ESYGYX3ESZiTAKESZqfarGa8pPhQ8ZYOdsOEGA@mail.gmail.com>
From: Paulo Motta <pauloricardomg@gmail.com>
Date: Wed, 10 Aug 2016 08:31:14 -0300
Message-ID: <CAKaZCX4RquSPQOiAjc-PqPFiuU+1Rj2UBW5=M75TWgUw=YeUdg@mail.gmail.com>
Subject: Re: nodetool repair with -pr and -dc
To: "user@cassandra.apache.org" <user@cassandra.apache.org>
Content-Type: multipart/alternative; boundary=001a114fc2d8e846eb0539b5fd67
archived-at: Wed, 10 Aug 2016 11:31:42 -0000

--001a114fc2d8e846eb0539b5fd67
Content-Type: text/plain; charset=UTF-8

On 2.0 repair -pr option is not supported together with -local, -hosts or
-dc, since it assumes you need to repair all nodes in all DCs and it will
throw and error if you try to run with nodetool, so perhaps there's
something wrong with range_repair options parsing.

On 2.1 it was added support to simultaneous -pr and -local options on
CASSANDRA-7450, so if you need that you can either upgade to 2.1 or
backport that to 2.0.

2016-08-10 5:20 GMT-03:00 Anishek Agarwal <anishek@gmail.com>:

> Hello,
>
> We have 2.0.17 cassandra cluster(*DC1*) with a cross dc setup with a
> smaller cluster(*DC2*).  After reading various blogs about
> scheduling/running repairs looks like its good to run it with the following
>
>
> -pr for primary range only
> -st -et for sub ranges
> -par for parallel
> -dc to make sure we can schedule repairs independently on each Data centre
> we have.
>
> i have configured the above using the repair utility @
> https://github.com/BrianGallew/cassandra_range_repair.git
>
> which leads to the following command :
>
> ./src/range_repair.py -k [keyspace] -c [columnfamily name] -v -H localhost
> -p -D* DC1*
>
> but looks like the merkle tree is being calculated on nodes which are part
> of other *DC2.*
>
> why does this happen? i thought it should only look at the nodes in local
> cluster. however on nodetool the* -pr* option cannot be used with *-local* according
> to docs @https://docs.datastax.com/en/cassandra/2.0/cassandra/tools/
> toolsRepair.html
>
> so i am may be missing something, can someone help explain this please.
>
> thanks
> anishek
>

--001a114fc2d8e846eb0539b5fd67
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">On 2.0 repair -pr option is not supported together with -l=
ocal, -hosts or -dc, since it assumes you need to repair all nodes in all D=
Cs and it will throw and error if you try to run with nodetool, so perhaps =
there&#39;s something wrong with range_repair options parsing.<br><br>On 2.=
1 it was added support to simultaneous -pr and -local options on CASSANDRA-=
7450, so if you need that you can either upgade to 2.1 or backport that to =
2.0.<br><div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">2016=
-08-10 5:20 GMT-03:00 Anishek Agarwal <span dir=3D"ltr">&lt;<a href=3D"mail=
to:anishek@gmail.com" target=3D"_blank">anishek@gmail.com</a>&gt;</span>:<b=
r><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:=
1px #ccc solid;padding-left:1ex"><div dir=3D"ltr">Hello,<div><br></div><div=
>We have 2.0.17 cassandra cluster(<b>DC1</b>) with a cross dc setup with a =
smaller cluster(<b>DC2</b>).=C2=A0 After reading various blogs about schedu=
ling/running repairs looks like its good to run it with the following=C2=A0=
</div><div><br></div><div><br></div><div>-pr for primary range only=C2=A0</=
div><div>-st -et for sub ranges=C2=A0</div><div>-par for parallel=C2=A0</di=
v><div>-dc to make sure we can schedule repairs independently on each Data =
centre we have.=C2=A0</div><div><br></div><div>i have configured the above =
using the repair utility @ <a href=3D"https://github.com/BrianGallew/cassan=
dra_range_repair.git" target=3D"_blank">https://github.com/BrianGallew<wbr>=
/cassandra_range_repair.git</a></div><div><br></div><div>which leads to the=
 following command :</div><div><br></div><div>./src/range_repair.py -k [key=
space] -c [columnfamily name] -v -H localhost -p -D<b> DC1</b><br></div><di=
v><br></div><div>but looks like the merkle tree is being calculated on node=
s which are part of other <b>DC2.</b></div><div><b><br></b></div><div>why d=
oes this happen? i thought it should only look at the nodes in local cluste=
r. however on nodetool the<i> -pr</i> option cannot be used with <i>-local<=
/i>=C2=A0according to docs @<a href=3D"https://docs.datastax.com/en/cassand=
ra/2.0/cassandra/tools/toolsRepair.html" target=3D"_blank">https://docs.dat=
astax.com/en/<wbr>cassandra/2.0/cassandra/tools/<wbr>toolsRepair.html</a></=
div><div><br></div><div>so i am may be missing something, can someone help =
explain this please.</div><div><br></div><div>thanks</div><span><font color=
=3D"#888888"><div>anishek</div></font></span></div>
</blockquote></div><br></div></div></div>

--001a114fc2d8e846eb0539b5fd67--