I have created to different types "host (osd0,osd1 in it) , ghost
(osd2 in it ) " and used two separate crushrules to use them.
so can i create two different pools utilizing two different
crush_ruleset for data placement . Right now I am using Ceph v 0.36
with it , when i do so it goes unresponsive.
Regards,
Hemant Surale.
On Mon, Sep 17, 2012 at 8:34 PM, Wido den Hollander <wido@xxxxxxxxx> wrote:
> On 09/17/2012 11:42 AM, hemant surale wrote:
>>
>> Hi Community,
>>
>> I have read the documentation to know crush map as well as
>> inserting new crushmap, But I have qn that even after writing own rule
>> for data placement how we can apply it for data placement? in short
>> how to utilize newly specified rule when new data insertion is
>> executed.
>>
>
> Every rule has a "ruleset" ID which is an integer, like:
>
> rule data {
> ruleset 0
> ...
> ...
> }
>
> Every pool has an attribute called "crush_ruleset 0".
>
> So if you change the ruleset in the crushmap it will re-distribute all the
> data according to the new rule. New data will be placed according to this
> new ruleset.
>
> If you created a NEW ruleset you should create a new pool like this:
>
> $ rados mkpool mynewpool 0 4
>
> See --help for more information.
>
> This should however get you going.
>
> Wido
>
>> Currently I am using "rados -p <poolname> put/get Objname
>> filename" cmd to put/get data into ceph.
>>
>> Thanks for helping me out till now.
>>
>>
>>
>> Regards,
>> Hemant Surale.
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