Track down where it says they point to? Does it match what you expect? It
does for me. I have my DB on my data disk and my WAL on a separate NVMe.
On Mon, Oct 22, 2018 at 3:21 PM Robert Stanford <rstanford8...@gmail.com>
wrote:
>
> 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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>>
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