.
*From:* AJ [mailto:a...@dude.podzone.net]
*Sent:* Friday, June 24, 2011 11:28 PM
*To:* user@cassandra.apache.org
*Subject:* Re: Cassandra ACID
Ok, here it is reworked; consider it a summary of the thread. If I
left out an imp
ode, but not the others.
From: AJ [mailto:a...@dude.podzone.net]
Sent: Friday, June 24, 2011 11:28 PM
To: user@cassandra.apache.org
Subject: Re: Cassandra ACID
Ok, here it is reworked; consider it a summary of the thread. If I left
out an important point that
>
> That being said, we do not provide isolation, which means in particular
> that
> reads *can* return a state where only parts of a batch update seems applied
> (and it would clearly be cool to have isolation and I'm not even
> saying this will
> never happen).
Out of curiosity, do you see any
> We do always provide atomicity of updates in the same batch_mutate call
> under a given key. Which means that for a given key, all update of the batch
> will be applied, or none of them. This is *always* true and this does not
> depend
> on the commit log (and granted, if the write timeout, you
Ok, here it is reworked; consider it a summary of the thread. If I left
out an important point that you think is 100% correct even if you
already mentioned it, then make some noise about it and provide some
evidence so it's captured sufficiently. And, if you're in a debate,
please try and get
On 6/23/2011 8:55 PM, AJ wrote:
Can any Cassandra contributors/guru's confirm my understanding of
Cassandra's degree of support for the ACID properties?
I provide official references when known. Please let me know if I
missed some good official documentation.
*Atomicity*
All individual writ
On Fri, Jun 24, 2011 at 9:11 AM, Peter Schuller
wrote:
>> Atomicity
>> All individual writes are atomic at the row level. So, a batch mutate for
>> one specific key will apply updates to all the columns for that one specific
>> row atomically. If part of the single-key batch update fails, then a
> Atomicity
> All individual writes are atomic at the row level. So, a batch mutate for
> one specific key will apply updates to all the columns for that one specific
> row atomically. If part of the single-key batch update fails, then all of
> the updates will be reverted since they all pertaine
