[project-voldemort] Cassandra vs. Voldemort benchmark

[kristian]

There is a benchmark comparing Cassandra to Voldemort performance
here:

http://blog.medallia.com/2010/05/choosing_a_keyvalue_storage_sy.html

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[Ron Reynolds]

interesting read - thanks!

this:
Voldemort client.put(K key, V value) (not the one that takes a Version object) throws ObsoleteVersionException if called with the same key from different threads. The javadoc states "Associated (sic) the given value to the key, clobbering any existing values stored for the key. ", so this was not expected.

must be the cause of the ObsoleteVersionExceptions we keep seeing thrown in our own multi-threaded client code.  what's the fix/work-around?

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From: kristian <kre...@gmail.com>
To: project-voldemort <project-...@googlegroups.com>
Sent: Fri, May 7, 2010 8:02:21 PM
Subject: [project-voldemort] Cassandra vs. Voldemort benchmark

There is a benchmark comparing Cassandra to Voldemort performance
here:

http://blog.medallia.com/2010/05/choosing_a_keyvalue_storage_sy.html

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[Roshan Sumbaly]

@Ron, Do have a look at
applyUpdate(UpdateAction<K,V> action, int maxTries) in StoreClient interface
[Example usage in http://github.com/voldemort/voldemort/blob/master/test/integration/voldemort/performance/RemoteTest.java ]

Roshan

[Geir Magnusson Jr.]

did I just miss it or did he say what he used for the store itself? I've found V fairly sensitive to this and how you tune BDB, so I wonder if we could do even better :)

geir

[OG]

Yeah, look for my comment on the blog post about exactly that (and a
few other things).
I need to write a post with benchmark checklist for people who choose
to publish their benchmarks and make broad claims...

Otis
----
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On May 8, 7:17 am, "Geir Magnusson Jr." <g...@pobox.com> wrote:
> did I just miss it or did he say what he used for the store itself?  I've found V fairly sensitive to this and how you tune BDB, so I wonder if we could do even better :)
>
> geir
>
> On May 7, 2010, at 11:02 PM, kristian wrote:
>
> > There is a benchmark comparing Cassandra to Voldemort performance
> > here:
>
> >http://blog.medallia.com/2010/05/choosing_a_keyvalue_storage_sy.html
>
> > --
> > You received this message because you are subscribed to the Google Groups "project-voldemort" group.
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>
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[Alex Feinberg]

applyUpdate() would do the trick. It's also useful as a general way of
"optimistic locking" e.g., for keeping a counter. We should probably
documented it on the site or wiki (perhaps publish some "recipes"?)

Thanks,
- Alex

[Ron Reynolds]

yeah, a best-practices/cookbook (in the sense of the O'Reilly Cookbooks - "given a common problem, this is a near-best solution...") would be awesome. 

---

From: Alex Feinberg <fein...@gmail.com>
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Sent: Sat, May 8, 2010 9:27:42 AM
Subject: Re: [project-voldemort] Cassandra vs. Voldemort benchmark

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