Thanks Suni, that makes sense. The largest number I may mount concurrently is 12, I just went a bit bigger for "possible" growth.

I appreciate the fast response.

Jerry



Sunil Mushran wrote:
-N 16 means 16 journals. I think it defaults to 256M journals. So that's 4G. Do you plan to mount it on 16 nodes? If not, reduce that. Other options is a smaller journal. But you have to be careful as a small journal could limit your write thruput.


On Mon, Apr 15, 2013 at 1:37 PM, Jerry Smith <jds...@sandia.gov <mailto:jds...@sandia.gov>> wrote:

    Good afternoon,

    I have an OEL 6.3 box with a few ocfs2 mounts mounted locally, and was
    wondering what I should expect to lose via formatting etc from a disk
    usage standpoint.

    -bash-4.1$ df -h | grep ocfs2
    /dev/dm-15             12G  1.3G   11G  11% /ocfs2/redo0
    /dev/dm-13            120G  4.2G  116G   4% /ocfs2/software-master
    /dev/dm-10             48G  4.1G   44G   9% /ocfs2/arch0
    /dev/dm-14            2.5T  6.7G  2.5T   1% /ocfs2/ora01
    /dev/dm-11            1.5T  5.7G  1.5T   1% /ocfs2/ora02
    /dev/dm-17            100G  4.2G   96G   5% /ocfs2/ora03
    /dev/dm-12            200G  4.3G  196G   3% /ocfs2/ora04
    /dev/dm-16            3.0T  7.3G  3.0T   1% /ocfs2/orabak01
    -bash-4.1$


    For example ora04 is 196GB total, but with zero usage it shows
    4.3GB used:

    [root@oeldb10 ~]#df -h /ocfs2/ora04
    Filesystem            Size  Used Avail Use% Mounted on
    /dev/dm-12            200G  4.3G  196G   3% /ocfs2/ora04
    [root@oeldb10 ~]#find /ocfs2/ora04/ | wc -l
    3
    [root@oeldb10 ~]#find /ocfs2/ora04/ -exec du -sh {} \;
    0    /ocfs2/ora04/
    0    /ocfs2/ora04/lost+found
    0    /ocfs2/ora04/db66snlux


    Filesystems formatted via

    mkfs -t ocfs2 -N 16 --fs-features=xattr,local -L ${device} ${device}

    Mount options

    [root@oeldb10 ~]#mount |grep ora04
    /dev/dm-12 on /ocfs2/ora04 type ocfs2
    (rw,_netdev,nointr,user_xattr,heartbeat=none)

    Thanks,

    --Jerry



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