Re: [PVE-User] Ceph: Some trouble creating OSD with journal on a sotware raid device...

2016-12-16 Thread Brian ::
This is probably by design.. On Thu, Dec 15, 2016 at 11:48 AM, Marco Gaiarin wrote: > > Sorry, i came back to this topic because i've done some more tests. > > Seems that 'pveceph' tool have some trouble creating OSD with journal > on ''nonstandard'' partition, for examply on a

Re: [PVE-User] Ceph: Some trouble creating OSD with journal on a sotware raid device...

2016-12-15 Thread Marco Gaiarin
Sorry, i came back to this topic because i've done some more tests. Seems that 'pveceph' tool have some trouble creating OSD with journal on ''nonstandard'' partition, for examply on a MD device. A command like: pveceph createosd /dev/sde --journal_dev /dev/md4 fail mysteriously (OSD

Re: [PVE-User] Ceph: Some trouble creating OSD with journal on a sotware raid device...

2016-10-13 Thread Marco Gaiarin
Mandi! Alwin Antreich In chel di` si favelave... > The ratio for SDD journal to OSD disks, can be done by a simple dd test. Take > the write speed of the SSD and divide it > through the write speed of the OSD, then you will get the max number of disks > that can be used on one SSD, without >

Re: [PVE-User] Ceph: Some trouble creating OSD with journal on a sotware raid device...

2016-10-13 Thread Marco Gaiarin
Mandi! Alwin Antreich In chel di` si favelave... > I have to ask a more general question here, why are you putting the journal > on a RAID1? For safety? > For better performance and less > complexity the journal should reside on standalone SSDs. With the RAID1 you > limit the speed of the

Re: [PVE-User] Ceph: Some trouble creating OSD with journal on a sotware raid device...

2016-10-13 Thread Alwin Antreich
Hello Marco, On 10/13/2016 12:13 PM, Marco Gaiarin wrote: > > I'm a bit confused. > > I'm trying to create 4 OSD on a server, where the SO reside on a > raid-1. On the same (couple of) disk there's 4 50MB partition for > the journal (the two disks are SSD). > Better with a command: I have to

[PVE-User] Ceph: Some trouble creating OSD with journal on a sotware raid device...

2016-10-13 Thread Marco Gaiarin
I'm a bit confused. I'm trying to create 4 OSD on a server, where the SO reside on a raid-1. On the same (couple of) disk there's 4 50MB partition for the journal (the two disks are SSD). Better with a command: root@vedovanera:~# blkid /dev/sdf1: UUID="75103d23-83a6-9f5d-eb1e-f021e729041b"