Re: [ceph-users] Setting a different number of minimum replicas for reading and writing operations

[Sergio A. de Carvalho Jr.]

Ok, thanks for confirming.

On Thu, Mar 23, 2017 at 7:32 PM, Gregory Farnum  wrote:

> Nope. This is a theoretical possibility but would take a lot of code
> change that nobody has embarked upon yet.
> -Greg
> On Wed, Mar 22, 2017 at 2:16 PM Sergio A. de Carvalho Jr. <
> scarvalh...@gmail.com> wrote:
>
>> Hi all,
>>
>> Is it possible to create a pool where the minimum number of replicas for
>> the write operation to be confirmed is 2 but the minimum number of replicas
>> to allow the object to be read is 1?
>>
>> This would be useful when a pool consists of immutable objects, so we'd
>> have:
>> * size 3 (we always keep 3 replicas of all objects)
>> * min size for write 2 (write is complete once 2 replicas are created)
>> * min size for read 1 (read is allowed even if only 1 copy of the object
>> is available)
>>
>> Thanks,
>>
>> Sergio
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>> ceph-users mailing list
>> ceph-users@lists.ceph.com
>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>>
>
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Re: [ceph-users] Setting a different number of minimum replicas for reading and writing operations

[Gregory Farnum]

Nope. This is a theoretical possibility but would take a lot of code change
that nobody has embarked upon yet.
-Greg
On Wed, Mar 22, 2017 at 2:16 PM Sergio A. de Carvalho Jr. <
scarvalh...@gmail.com> wrote:

> Hi all,
>
> Is it possible to create a pool where the minimum number of replicas for
> the write operation to be confirmed is 2 but the minimum number of replicas
> to allow the object to be read is 1?
>
> This would be useful when a pool consists of immutable objects, so we'd
> have:
> * size 3 (we always keep 3 replicas of all objects)
> * min size for write 2 (write is complete once 2 replicas are created)
> * min size for read 1 (read is allowed even if only 1 copy of the object
> is available)
>
> Thanks,
>
> Sergio
> ___
> ceph-users mailing list
> ceph-users@lists.ceph.com
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>
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[ceph-users] Setting a different number of minimum replicas for reading and writing operations

[Sergio A. de Carvalho Jr.]

Hi all,

Is it possible to create a pool where the minimum number of replicas for
the write operation to be confirmed is 2 but the minimum number of replicas
to allow the object to be read is 1?

This would be useful when a pool consists of immutable objects, so we'd
have:
* size 3 (we always keep 3 replicas of all objects)
* min size for write 2 (write is complete once 2 replicas are created)
* min size for read 1 (read is allowed even if only 1 copy of the object is
available)

Thanks,

Sergio
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