Re: Ceph performance improvement

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Are you sure your osd data and journal are on the disks you think? The
/home paths look suspicious -- especially for journal, which often
should be a block device.


I am :)

Can you share output of "mount" and "ls -ld /home/osd.*"

Here are some details :

root@ceph-osd-0:~# ls -al /dev/disk/by-id/
lrwxrwxrwx 1 root root 9 août 21 21:19 scsi-SATA_C300-CTFDDAC06400000000104903008FE4 -> ../../sda lrwxrwxrwx 1 root root 9 août 22 10:57 scsi-SATA_WDC_WD30EZRX-00_WD-WMAWZ0124762 -> ../../sdh lrwxrwxrwx 1 root root 9 août 21 16:03 scsi-SATA_WDC_WD30EZRX-00_WD-WMAWZ0137898 -> ../../sdg lrwxrwxrwx 1 root root 9 août 21 21:19 scsi-SATA_WDC_WD30EZRX-00_WD-WMAWZ0152201 -> ../../sdf lrwxrwxrwx 1 root root 9 août 21 16:03 scsi-SATA_WDC_WD30EZRX-00_WD-WMAWZ0152562 -> ../../sdc

root@ceph-osd-0:~# mount
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
udev on /dev type devtmpfs (rw,relatime,size=10240k,nr_inodes=1020030,mode=755) devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=817216k,mode=755)
/dev/disk/by-uuid/7d95d243-1788-4c3f-9f89-166c15f880f0 on / type ext3 (rw,relatime,errors=remount-ro,barrier=1,data=ordered)
tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,relatime,size=1634432k)
tmpfs on /run/shm type tmpfs (rw,nosuid,nodev,relatime,size=1634432k)
/dev/sda on /home type btrfs (rw,relatime,ssd,space_cache)
/dev/sdf on /home/osd.0 type btrfs (rw,noatime,space_cache)

root@ceph-osd-0:~# ls -ld /home/osd.*
drwxr-xr-x 1 root root        236 août  22 17:22 /home/osd.0
-rw-r--r-- 1 root root 1048576000 août  22 17:22 /home/osd.0.journal

Regards,
Denis
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