Thank you Konstantin,Radim. Appreciate your responses.

On Mon, Nov 14, 2011 at 11:27 PM, Radim Kolar <[email protected]> wrote:

>
>  It may be the case that your CL is the issue. You are writing it at
>> ONE, which means that out of the 4 replicas of that key (two in each
>> data center), you are only putting it on one of them.
>>
> cassandra will always try to replicate key to all available replicas.
> Under normal conditions if you do write + wait about 1 sec + then read at
> CL.ONE you should get back correct value. Consistency in cassandra is not
> problem in real world, its way better then SQL databases with async
> replication. Make sure you have your clients clock synced via NTP,
>

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