swift currency calc

asked 2013-05-16 18:04:57 -0500

Hi . Someone know, how can i calculate concurrency for each swift's server ?

in my case i have 2 quad CPU with HT, 16 cpu's core after all.

I just set. object-server workers = 8 container-server/accont-server worker = 4

But, i have currency's options too. how can i calculate currency for servers?

Thanks

Jose Augusto

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answered 2013-05-16 18:21:16 -0500

clay-gerrard gravatar image

This page has description of the "concurrency" options in the configs:

http://docs.openstack.org/developer/swift/deployment_guide.html (http://docs.openstack.org/developer/s...)

Defaults are normally fine.

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answered 2013-05-16 23:22:54 -0500

Thanks Clayg.

There's interesting things there. One in specific, there are some places with this comment "Should be tuned according to individual system specs".

I will change somethings for test, in relation cpu x workers, in my case i'll have small quantity container changes and heavy use to write objects in server.

Now with the same server i got 50 request more of the first configuration, after improve the workers and change some options concurrency.

Do you know where can i find some example to "individual system specs"? for small objects, 20k ~ 40k.

[]'s

Jose Augusto

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answered 2013-05-20 23:00:15 -0500

clay-gerrard gravatar image

The -auditor options have mostly to do with disk speed. I'm not sure enough folks are tweaking those values to really justify those comments.

Changing them will effect I/O on the nodes. You'll first have to start monitoring -auditor cycle time to get a feel for how tuning them down (to decrease the ambient I/O) will effect the auditor cycle time. If you've sufficiently scaled with a good balance of hot and cold objects, and enough i/o headroom you might turning them up to get faster bit rot detection.

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Asked: 2013-05-16 18:04:57 -0500

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Last updated: May 20 '13