Re: Atomicity Strategies

Thanks Aaron! On 6/22/2011 5:25 PM, aaron morton wrote: Atomic on a single machine yes. - Aaron Morton Freelance Cassandra Developer @aaronmorton http://www.thelastpickle.com On 23 Jun 2011, at 09:42, AJ wrote: On 4/9/2011 7:52 PM, aaron morton wrote: My understanding of wha

Re: Atomicity Strategies

Atomic on a single machine yes. - Aaron Morton Freelance Cassandra Developer @aaronmorton http://www.thelastpickle.com On 23 Jun 2011, at 09:42, AJ wrote: > On 4/9/2011 7:52 PM, aaron morton wrote: >> My understanding of what they did with locking (based on the examples) was >>

Re: Atomicity Strategies

On 4/9/2011 7:52 PM, aaron morton wrote: My understanding of what they did with locking (based on the examples) was to achieve a level of transaction isolation http://en.wikipedia.org/wiki/Isolation_(database_systems) I think the

Re: Atomicity Strategies

A Strategy that should Cover at least some use Cases is roughly like this: Given cf A and B should Be in Sync In write 'a' to cf A Add another Column 'Synchronisation_token' and Write a tuuid 'T' (or a timestamp or some Otter Value that Allows (Time based) ordering) As its value. On the related

Re: Atomicity Strategies

My understanding of what they did with locking (based on the examples) was to achieve a level of transaction isolation http://en.wikipedia.org/wiki/Isolation_(database_systems) I think the issue here is more about atomicity http://wiki.apache.org/cassandra/FAQ#batch_mutate_atomic We cannot g

Re: Atomicity Strategies

Here's a good writeup on how fightmymonster.com does it... http://ria101.wordpress.com/category/nosql-databases/locking/ -- Dan Washusen Make big files fly visit digitalpigeon.com On Saturday, 9 April 2011 at 11:53 AM, Alex Araujo wrote: On 4/8/11 5:46 PM, Drew Kutcharian wrote: > > I'm interes

Re: Atomicity Strategies

On 4/8/11 5:46 PM, Drew Kutcharian wrote: I'm interested in this too, but I don't think this can be done with Cassandra alone. Cassandra doesn't support transactions. I think hector can retry operations, but I'm not sure about the atomicity of the whole thing. On Apr 8, 2011, at 1:26 PM, Ale

Re: Atomicity Strategies

I'm interested in this too, but I don't think this can be done with Cassandra alone. Cassandra doesn't support transactions. I think hector can retry operations, but I'm not sure about the atomicity of the whole thing. On Apr 8, 2011, at 1:26 PM, Alex Araujo wrote: > Hi, I was wondering if th