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From Tyler Hobbs <>
Subject Re: Does the 'batch' order matter ?
Date Wed, 14 Mar 2012 20:15:21 GMT
On Wed, Mar 14, 2012 at 11:50 AM, A J <> wrote:

> Are you saying the way 'batch mutate' is coded, the order of writes in
> the batch does not mean anything ? You can ask the batch to do A,B,C
> and then D in sequence; but sometimes Cassandra can end up applying
> just C and A,B (and D) may still not be applied ?

No, batch_mutate() is an atomic operation.  When a node locally applies a
batch mutation, either all of the changes are applied or none of them are.

Aaron was referring to the possibility that one of the replicas received
the batch_mutate, but the other replicas did not.

Tyler Hobbs
DataStax <>

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