[infinispan-dev] Staggering remote GET calls

[Mircea Markus]

So you are testing embedded mode with RadarGun?
Or remotely over hotrod? 

On 20 Feb 2013, at 14:38, Radim Vansa wrote:

> Ouch, call me dumbass... I haven't checked the test results. Something revoked my cluster allocation and the test was prematurely stopped.
> 
> I'll rerun it (and check!), and show performance numbers as well.
> 
> Radim (the dumbass)
> 
> ----- Original Message -----
> | From: "Dan Berindei" <dan.berindei at gmail.com>
> | To: "infinispan -Dev List" <infinispan-dev at lists.jboss.org>
> | Cc: "Manik Surtani" <msurtani at redhat.com>
> | Sent: Wednesday, February 20, 2013 3:24:46 PM
> | Subject: Re: [infinispan-dev] Staggering remote GET calls
> |  
> | 
> | Radim, just to be sure, you are testing embedded mode with RadarGun,
> | right? With HotRod most of the get operations should be initiated
> | from the main owner, so Manik's changes shouldn't make a big
> | difference in the number of active threads.
> | 
> | How about throughput, has it also improved compared to 5.2.0.CR3, or
> | is it the same?
> | 
> | 
> | 
> | 
> | 
> | On Wed, Feb 20, 2013 at 2:15 PM, Radim Vansa < rvansa at redhat.com >
> | wrote:
> | 
> | 
> | Hi Manik,
> | 
> | so I have tried to compile this branch and issued a 20 minute stress
> | test (preceded by 10 minute warmup) on 128 nodes, where each node
> | has 10 stressor threads.
> | While in 5.2.0.CR3 the maximum OOB threadpool size was 553 with this
> | configuration, with t_825 it was 219. This looks good, but it's
> | actually better :). When I looked on the per-node maximum, in t_825
> | there was only one node with the 219 threads (as the max), others
> | were usually around 25, few around 40. On the contrary, in 5.2.0.CR3
> | all the nodes had maximum around 500!
> | 
> | Glad to bring good news :)
> | 
> | Radim
> | 
> | 
> | 
> | ----- Original Message -----
> | | From: "Manik Surtani" < msurtani at redhat.com >
> | | To: "infinispan -Dev List" < infinispan-dev at lists.jboss.org >,
> | | "Radim Vansa" < rvansa at redhat.com >
> | | Sent: Tuesday, February 19, 2013 6:33:04 PM
> | | Subject: Staggering remote GET calls
> | | 
> | | Guys,
> | | 
> | | I have a topic branch with a fix for ISPN-825, to stagger remote
> | | GET
> | | calls. (See the JIRA for details on this patch).
> | | 
> | | This should have an interesting effect on greatly reducing the
> | | pressure on the OOB thread pool. This isn't a *real* fix for the
> | | problem that Radim reported (Pedro is working on that with Bela),
> | | but reducing pressure on the OOB thread pool is a side effect of
> | | this fix.
> | | 
> | | It should generally make things faster too, with less traffic on
> | | the
> | | network. I'd be curious for you to give this branch a try, Radim -
> | | see how it impacts your tests.
> | | 
> | | https://github.com/maniksurtani/infinispan/tree/t_825
> | | 
> | | Cheers
> | | Manik
> | | --
> | | Manik Surtani
> | | manik at jboss.org
> | | twitter.com/maniksurtani
> | | 
> | | Platform Architect, JBoss Data Grid
> | | http://red.ht/data-grid
> | | 
> | | 
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> | 
> | 
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Cheers,
-- 
Mircea Markus
Infinispan lead (www.infinispan.org)




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