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From horschi <>
Subject Re: Offline migration: Random->Murmur
Date Mon, 23 Dec 2013 15:20:21 GMT
Interesting you even dare to do a live migration :-)

Do you do all Murmur-writes with the timestamp from the "Random"-data? So
that all migrated data is written with timestamps from the past.

On Mon, Dec 23, 2013 at 3:59 PM, Rahul Menon <> wrote:

> 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 <> 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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