Jason, I haven't heard much about this feature.
Will the localization have effect if the crush location configuration is set in the [osd] section, or does it need to apply globally for clients as well?
On Fri, Mar 31, 2017 at 6:38 AM, Jason Dillaman <jdillama@xxxxxxxxxx> wrote:
Assuming you are asking about RBD-back VMs, it is not possible to
localize the all reads to the VM image. You can, however, enable
localization of the parent image since that is a read-only data set.
To enable that feature, set "rbd localize parent reads = true" and
populate the "crush location = host=X rack=Y etc=Z" in your ceph.conf.
--
On Fri, Mar 31, 2017 at 9:00 AM, Alejandro Comisario
<alejandro@xxxxxxxxxxx> wrote:
> any experiences ?
>
> On Wed, Mar 29, 2017 at 2:02 PM, Alejandro Comisario
> <alejandro@xxxxxxxxxxx> wrote:
>> Guys hi.
>> I have a Jewel Cluster divided into two racks which is configured on
>> the crush map.
>> I have clients (openstack compute nodes) that are closer from one rack
>> than to another.
>>
>> I would love to (if is possible) to specify in some way the clients to
>> read first from the nodes on a specific rack then try the other one if
>> is not possible.
>>
>> Is that doable ? can somebody explain me how to do it ?
>> best.
>>
>> --
>> Alejandrito
>
>
>
> --
> Alejandro Comisario
> CTO | NUBELIU
> E-mail: alejandro@nubeliu.comCell: +54 9 11 3770 1857
> _
> www.nubeliu.com
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Jason
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