Hi George,
We have several journal partition on our SSDs too. Using ceph-deploy utility (as Dan mentioned before),I think it is best way:
ceph-deploy osd create HOST:DISK[:JOURNAL] [HOST:DISK[:JOURNAL]...]
where journal will be the path to journal disk (not to partition):
ceph-deploy osd create osdserver01:sda:/dev/sdm osdserver01:/sdb:/dev/sdm #(this will create sda1, sdm1 and sdb1, sdm2 , sdm1 and sdm2 journal).
Be sure the disks are empty using "ceph-deploy osd list" and "ceph-deploy osd zap".
regards, I
2016-07-06 14:11 GMT+02:00 Dan van der Ster <dan@xxxxxxxxxxxxxx>:
We have 5 journal partitions per SSD. Works fine (on el6 and el7).
Best practice is to use ceph-disk:
ceph-disk prepare /dev/sde /dev/sdc # where e is the osd, c is an SSD.
-- Dan
On Wed, Jul 6, 2016 at 2:03 PM, George Shuklin <george.shuklin@xxxxxxxxx> wrote:
> Hello.
>
> I've been testing Intel 3500 as journal store for few HDD-based OSD. I
> stumble on issues with multiple partitions (>4) and UDEV (sda5, sda6,etc
> sometime do not appear after partition creation). And I'm thinking that
> partition is not that useful for OSD management, because linux do no allow
> partition rereading with it contains used volumes.
>
> So my question: How you store many journals on SSD? My initial thoughts:
>
> 1) filesystem with filebased journals
> 2) LVM with volumes
>
> Anything else? Best practice?
>
> P.S. I've done benchmarking: 3500 can support up to 16 10k-RPM HDD.
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Iban Cabrillo Bartolome
Instituto de Fisica de Cantabria (IFCA)
Santander, Spain
Tel: +34942200969
Iban Cabrillo Bartolome
Instituto de Fisica de Cantabria (IFCA)
Santander, Spain
Tel: +34942200969
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Bertrand Russell:
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Bertrand Russell:
"El problema con el mundo es que los estúpidos están seguros de todo y los inteligentes están llenos de dudas"
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