incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jonathan Ellis <jbel...@gmail.com>
Subject Re: batch_mutate atomicity
Date Sat, 07 Aug 2010 00:45:26 GMT
Everything in the same key of a batch_mutate is atomic.  (But not isolated.)

On Fri, Aug 6, 2010 at 2:15 PM, B. Todd Burruss <bburruss@real.com> wrote:
> ok i just saw the FAQ
> (http://wiki.apache.org/cassandra/FAQ#batch_mutate_atomic)
>
> follow up question ...
>
> it states that "As a special case, mutations against a single key are
> atomic, but more generally no" ... i interpret that to also mean " ..
> mutations against a single key in the same CF ... "
>
> so if i have several mutatations against a single key, but multiple
> column families i assume this is not atomic?
>
> thx
>
>
> On Fri, 2010-08-06 at 11:08 -0700, Todd Burruss wrote:
>> if i am using batch_mutate to update/insert two columns in the same CF
>> and same key, is this an atomic operation?
>>
>> i understand that an operation on a single key in a CF is atomic, but
>> not sure if the above scenario boils down to two operations or
>> considered one operation.
>>
>> thx
>>
>
>
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com

Mime
View raw message