Amlan,

Can you provide information on how much data is being written? Are any of the 
columns really large? Are any writes succeeding or are all timing out?

Regards,

Eric R Medley

> On Apr 1, 2015, at 9:03 AM, Amlan Roy <amlan....@cleartrip.com> wrote:
> 
> Hi,
> 
> I am new to Cassandra. I have setup a cluster with Cassandra 2.0.13. I am 
> writing the same data in HBase and Cassandra and find that the writes are 
> extremely slow in Cassandra and frequently seeing exception “Cassandra 
> timeout during write query at consistency ONE". The cluster size for both 
> HBase and Cassandra are same. 
> 
> Looks like something is wrong with my cluster setup. What can be the possible 
> issue? Data and commit logs are written into two separate disks. 
> 
> Regards,
> Amlan

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