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From: Rahul Menon <rahul@apigee.com>
Date: Mon, 23 Dec 2013 20:29:26 +0530
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 <CAJMN9iPqXSsQ=Uh4+PAWraypbuuvn2q3BExyoK497-CuTAb09w@mail.gmail.com>
Subject: Re: Offline migration: Random->Murmur
To: user <user@cassandra.apache.org>
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Christian,

I have been planning to migrate my cluster from random to murmur3 in a
similar manner. I intend to use pycassa to read and then write to the newer
cluster. My only concern would be ensuring the consistency of already
migrated data as the cluster ( with random ) would be constantly serving
the production traffic. I was able to do this on a non prod cluster, but
production is a different game.

I would also like to hear more about this, especially if someone was able
to successfully do this.

Thanks
Rahul


On Mon, Dec 23, 2013 at 6:45 PM, horschi <horschi@gmail.com> wrote:

> Hi list,
>
> has anyone ever tried to migrate a cluster from Random to Murmur?
>
> We would like to do so, to have a more standardized setup. I wrote a small
> (yet untested) utility, which should be able to read SSTable files from
> disk and write them into a cassandra cluster using Hector. This migration
> would be offline of course and would only work for smaller clusters.
>
> Any thoughts on the topic?
>
> kind regards,
> Christian
>
> PS: The reason for doing so are not "performance". It is to simplify
> operational stuff for the years to come. :-)
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:verdana,=
sans-serif;color:rgb(0,0,0)">Christian, <br><br></div><div class=3D"gmail_d=
efault" style=3D"font-family:verdana,sans-serif;color:rgb(0,0,0)">I have be=
en planning to migrate my cluster from random to murmur3 in a similar manne=
r. I intend to use pycassa to read and then write to the newer cluster. My =
only concern would be ensuring the consistency of already migrated data as =
the cluster ( with random ) would be constantly serving the production traf=
fic. I was able to do this on a non prod cluster, but production is a diffe=
rent game. <br>

<br></div><div class=3D"gmail_default" style=3D"font-family:verdana,sans-se=
rif;color:rgb(0,0,0)">I would also like to hear more about this, especially=
 if someone was able to successfully do this. <br><br></div><div class=3D"g=
mail_default" style=3D"font-family:verdana,sans-serif;color:rgb(0,0,0)">

Thanks<br></div><div class=3D"gmail_default" style=3D"font-family:verdana,s=
ans-serif;color:rgb(0,0,0)">Rahul <br></div></div><div class=3D"gmail_extra=
"><br><br><div class=3D"gmail_quote">On Mon, Dec 23, 2013 at 6:45 PM, horsc=
hi <span dir=3D"ltr">&lt;<a href=3D"mailto:horschi@gmail.com" target=3D"_bl=
ank">horschi@gmail.com</a>&gt;</span> wrote:<br>

<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div><div><div><div><div>Hi=
 list,<br><br></div>has anyone ever tried to migrate a cluster from Random =
to Murmur?<br>

<br></div>We would like to do so, to have a more standardized setup. I wrot=
e a small (yet untested) utility, which should be able to read SSTable file=
s from disk and write them into a cassandra cluster using Hector. This migr=
ation would be offline of course and would only work for smaller clusters.<=
br>


</div></div><div><br>Any thoughts on the topic?<br><br></div>kind regards,<=
br>Christian<br><br></div>PS: The reason for doing so are not &quot;perform=
ance&quot;. It is to simplify operational stuff for the years to come. :-)<=
br>


</div>
</blockquote></div><br></div>

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