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From Shalom Sagges <shal...@liveperson.com>
Subject Re: Openstack and Cassandra
Date Sun, 01 Jan 2017 09:54:27 GMT
Thanks for the info Romain,

Can you tell me please what are the implications of not using CPU Pinning?




Shalom Sagges
DBA
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On Wed, Dec 28, 2016 at 7:01 PM, Romain Hardouin <romainh_ml@yahoo.fr>
wrote:

> Kilo is a bit old but the good news is that CPU pinning is available which
> IMHO is a must to run C* on Production.
> Of course your bottleneck will be shared HDDs.
>
> Best,
>
> Romain
>
>
> Le Mardi 27 décembre 2016 10h21, Shalom Sagges <shaloms@liveperson.com> a
> écrit :
>
>
> Hi Romain,
>
> Thanks for the input!
>
> We currently use the Kilo release of Openstack. Are you aware of any known
> bugs/issues with this release?
> We definitely defined anti-affinity rules regarding spreading C* on
> different hosts. (I surely don't want to be woken up at night due to a
> failed host ;-) )
>
> Regarding Trove, I doubt we'll use it in Production any time soon.
>
> Thanks again!
>
>
>
>
>
> Shalom Sagges
> DBA
> T: +972-74-700-4035 <+972%2074-700-4035>
> <http://www.linkedin.com/company/164748> <http://twitter.com/liveperson>
> <http://www.facebook.com/LivePersonInc> We Create Meaningful Connections
> <https://liveperson.docsend.com/view/8iiswfp>
>
>
> On Mon, Dec 26, 2016 at 7:37 PM, Romain Hardouin <romainh_ml@yahoo.fr>
> wrote:
>
> Hi Shalom,
>
> I assume you'll use KVM virtualization so pay attention to your stack at
> every level:
> - Nova e.g. CPU pinning, NUMA awareness if relevant, etc. Have a look to
> extra specs.
> - libvirt
> - KVM
> - QEMU
>
> You can also be interested by resources quota on other OpenStack VMs that
> will be colocated with C* VMs.
> Don't forget to define anti-affinity rules in order to spread out your C*
> VMs on different hosts.
> Finally, watch out versions of libvirt/KVM/QEMU. Some optimizations/bugs
> are good to know.
>
> Out of curiosity, which OpenStack release are you using?
> You can be interested by Trove but C* support is for testing only.
>
> Best,
>
> Romain
>
>
>
>
>
>
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