Re: free space calculation

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



What is the output of `lsblk`?

On Mon, Jun 26, 2017 at 4:32 PM Papp Rudolf Péter <peer@xxxxxxx> wrote:
Dear cephers,

Could someone show me an url where can I found how ceph calculate the
available space?

I've installed a small ceph (Kraken) environment with bluestore OSDs.
The servers contains 2 disks and 1 ssd. The disk 1. part is UEFI (~500
MB), 2. raid (~50GB), 3. ceph disk (450-950MB). 1 server with 2 500 GB
HDDs, 2 with 1 TB HDDs total 3 servers.

For example the HDD parts:
/dev/sdb1      2048     976895     974848   476M EFI System
/dev/sdb2    976896   98633727   97656832  46,6G Linux RAID
/dev/sdb3  98633728 1953525134 1854891407 884,5G Ceph OSD
info from ceph-disk:
  /dev/sda :
  /dev/sda1 other, vfat
  /dev/sda2 other, linux_raid_member
  /dev/sda3 ceph data, active, cluster ceph, osd.4, block.db /dev/sdc1,
block.wal /dev/sdc2
/dev/sdb :
  /dev/sdb1 other, vfat, mounted on /boot/efi
  /dev/sdb2 other, linux_raid_member
  /dev/sdb3 ceph data, active, cluster ceph, osd.1, block.db /dev/sdc3,
block.wal /dev/sdc4
/dev/sdc :
  /dev/sdc1 ceph block.db, for /dev/sda3
  /dev/sdc2 ceph block.wal, for /dev/sda3
  /dev/sdc3 ceph block.db, for /dev/sdb3
  /dev/sdc4 ceph block.wal, for /dev/sdb3

The reported size from ceph osd df tree:
ID WEIGHT  REWEIGHT SIZE   USE    AVAIL  %USE VAR  PGS TYPE NAME
-1 0.17578        -   179G   104M   179G 0.06 1.00   0 root default
-2 0.05859        - 61439M 35696k 61405M 0.06 1.00   0     host cl2
  0 0.02930  1.00000 30719M 17848k 30702M 0.06 1.00   0 osd.0
  3 0.02930  1.00000 30719M 17848k 30702M 0.06 1.00   0 osd.3
-3 0.05859        - 61439M 35696k 61405M 0.06 1.00   0     host cl3
  1 0.02930  1.00000 30719M 17848k 30702M 0.06 1.00   0 osd.1
  4 0.02930  1.00000 30719M 17848k 30702M 0.06 1.00   0 osd.4
-4 0.05859        - 61439M 35696k 61405M 0.06 1.00   0     host cl1
  2 0.02930  1.00000 30719M 17848k 30702M 0.06 1.00   0 osd.2
  5 0.02930  1.00000 30719M 17848k 30702M 0.06 1.00   0 osd.5
               TOTAL   179G   104M   179G 0.06
MIN/MAX VAR: 1.00/1.00  STDDEV: 0

~ 30GB each 10 percent of the smallest real size. 3x replication. Could
be possible that the system using wrong partition (2. in this scenario)
for usable space calculation? Can I write more data than the calculated?

Another hint?

Thank you!


_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com

[Index of Archives]     [Information on CEPH]     [Linux Filesystem Development]     [Ceph Development]     [Ceph Large]     [Ceph Dev]     [Linux USB Development]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [xfs]


  Powered by Linux