Hi!
Configuration:
rbd - erasure pool
rbdtier - tier pool for rbd
ceph osd tier add-cache rbd rbdtier 549755813888
ceph osd tier cache-mode rbdtier writeback
Create new rbd block device:
rbd create --size 16G rbdtest
rbd feature disable rbdtest object-map fast-diff deep-flatten
rbd device map r
Configuration:
rbd - erasure pool
rbdtier - tier pool for rbd
ceph osd tier add-cache rbd rbdtier 549755813888
ceph osd tier cache-mode rbdtier writeback
Create new rbd block device:
rbd create --size 16G rbdtest
rbd feature disable rbdtest object-map fast-diff deep-flatten
rbd device map rbdte
Why avoid cache tier? Does this only for erasure or for replicated too?
вс, 26 Авг 2018, 7:42 Konstantin Shalygin :
> > Configuration:
> > rbd - erasure pool
> > rbdtier - tier pool for rbd
> >
> > ceph osd tier add-cache rbd rbdtier 549755813888
> > ceph osd tier cache-mode rbdtier writeback
> >
On 08/26/2018 01:39 PM, Vasiliy Tolstov wrote:
Why avoid cache tier? Does this only for erasure or for replicated too?
Because cache tier is very uncommon feature. Cepher's was used it to
will have rbd writes to EC pools mostly, before Luminous [1]
Why this need for replicated? With cache tie
Hi!
In replicated pool rbd - the same behavior with tier.
- Original Message -
From: "Vasiliy Tolstov"
To: "Konstantin Shalygin"
Cc: ceph-users@lists.ceph.com, "Fyodor Ustinov"
Sent: Sunday, 26 August, 2018 09:39:15
Subject: Re: [ceph-users] Why rbd rn
On Sat, Aug 25, 2018 at 10:29 AM Fyodor Ustinov wrote:
>
> Hi!
>
> Configuration:
> rbd - erasure pool
> rbdtier - tier pool for rbd
>
> ceph osd tier add-cache rbd rbdtier 549755813888
> ceph osd tier cache-mode rbdtier writeback
>
> Create new rbd block device:
> rbd create --size 16G rbdtest
>
