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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Cassandra performance question
Date Wed, 25 Jan 2012 00:42:53 GMT
No argument there.  Thanks for explaining what you were doing to
encrypt client traffic!

On Mon, Jan 23, 2012 at 10:11 PM, Chris Marino <chris@vcider.com> wrote:
> Hi Jonathan, yes, when I say 'node encryption' I mean inter-Cassandra node
> encryption. When I say 'client encryption' I mean encrypted traffic from the
> Cassandra nodes to the clients. For these benchmarks we used the stress test
> client load generator.
>
> We ran test with no encryption, then with 'node only' and then again with
> both node and client encryption.
>
> Looking at the post again right now I realize that I never mention the
> client encryption technique.  My mistake.  We just used OpenVPN. We set it
> up on the client stress test machine and set up individual VPNs to each
> Cassandra node in the cluster.
>
> I tired to make it clear in my post where the performance gains
> were coming from. Didn't mean to confuse anyone. That said, if you're
> running in a public cloud and you want to encrypt, you've got to tackle the
> client traffic encryption problem as well so it seemed like performance
> gains that most could expect.
>
> CM
>
>
> On Mon, Jan 23, 2012 at 7:46 PM, Jonathan Ellis <jbellis@gmail.com> wrote:
>>
>> Can you elaborate on to what exactly you were testing on the Cassandra
>> side?  It sounds like what this post refers to as "node" encryption
>> corresponds to enabling "internode_encryption: all", but I couldn't
>> guess what your client encryption is since Cassandra doesn't support
>> that out of the box yet.  (Which is highly relevant since that's where
>> most of the slowdown you observed comes from.)
>>
>> On Fri, Dec 30, 2011 at 2:11 PM, Chris Marino <chris@vcider.com> wrote:
>> > We did some benchmarking as well.
>> >
>> >
>> > http://blog.vcider.com/2011/09/virtual-networks-can-run-cassandra-up-to-60-faster/
>> >
>> > Although we were primarily interested in the networking issues....
>> >
>> > CM
>> >
>> >
>> > On Fri, Dec 30, 2011 at 12:08 PM, Jeremy Hanna
>> > <jeremy.hanna1234@gmail.com>
>> > wrote:
>> >>
>> >> This might be helpful:
>> >>
>> >> http://techblog.netflix.com/2011/11/benchmarking-cassandra-scalability-on.html
>> >>
>> >> On Dec 30, 2011, at 1:59 PM, Dom Wong wrote:
>> >>
>> >> > Hi, could anyone tell me whether this is possible with Cassandra
>> >> > using
>> >> > an appropriately sized EC2 cluster.
>> >> >
>> >> > 100,000 clients writing 50k each to their own specific row at 5
>> >> > second
>> >> > intervals?
>> >>
>> >
>>
>>
>>
>> --
>> Jonathan Ellis
>> Project Chair, Apache Cassandra
>> co-founder of DataStax, the source for professional Cassandra support
>> http://www.datastax.com
>
>



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

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