David - is it ensured that wal and db both live where the symlink block.db
points? I assumed that was a symlink for the db, but necessarily for the
wal, because it can live in a place different than the db.
On Mon, Oct 22, 2018 at 2:18 PM David Turner <drakonst...@gmail.com> wrote:
> You can always just go to /var/lib/ceph/osd/ceph-{osd-num}/ and look at
> where the symlinks for block and block.wal point to.
>
> On Mon, Oct 22, 2018 at 12:29 PM Robert Stanford <rstanford8...@gmail.com>
> wrote:
>
>>
>> That's what they say, however I did exactly this and my cluster
>> utilization is higher than the total pool utilization by about the number
>> of OSDs * wal size. I want to verify that the wal is on the SSDs too but
>> I've asked here and no one seems to know a way to verify this. Do you?
>>
>> Thank you, R
>>
>> On Mon, Oct 22, 2018 at 5:22 AM Maged Mokhtar <mmokh...@petasan.org>
>> wrote:
>>
>>>
>>> If you specify a db on ssd and data on hdd and not explicitly specify a
>>> device for wal, wal will be placed on same ssd partition with db.
>>> Placing only wal on ssd or creating separate devices for wal and db are
>>> less common setups.
>>>
>>> /Maged
>>>
>>> On 22/10/18 09:03, Fyodor Ustinov wrote:
>>> > Hi!
>>> >
>>> > For sharing SSD between WAL and DB what should be placed on SSD? WAL
>>> or DB?
>>> >
>>> > ----- Original Message -----
>>> > From: "Maged Mokhtar" <mmokh...@petasan.org>
>>> > To: "ceph-users" <ceph-users@lists.ceph.com>
>>> > Sent: Saturday, 20 October, 2018 20:05:44
>>> > Subject: Re: [ceph-users] Drive for Wal and Db
>>> >
>>> > On 20/10/18 18:57, Robert Stanford wrote:
>>> >
>>> >
>>> >
>>> >
>>> > Our OSDs are BlueStore and are on regular hard drives. Each OSD has a
>>> partition on an SSD for its DB. Wal is on the regular hard drives. Should I
>>> move the wal to share the SSD with the DB?
>>> >
>>> > Regards
>>> > R
>>> >
>>> >
>>> > _______________________________________________
>>> > ceph-users mailing list [ mailto:ceph-users@lists.ceph.com |
>>> ceph-users@lists.ceph.com ] [
>>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com |
>>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com ]
>>> >
>>> > you should put wal on the faster device, wal and db could share the
>>> same ssd partition,
>>> >
>>> > Maged
>>> >
>>> > _______________________________________________
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