[Ocfs2-users] Out of space with plenty of it

[Sergey Bolbat]

Hi.

I'm using ocfs2 device with two nodes of 500Gb and I have 350Gb free.
Everything works fine. However I always recieve "out of disk space" error
in my web application and some performance problems because of that.

I know that this can be fixed by turning on discontig-bg feature but I've
already done that and it didn't help.
Then I saw that this feature is incompatible for my device:


root at 1:~# debugfs.ocfs2 -n -R "stats" /dev/xvdb1
        Revision: 0.90
        Mount Count: 0   Max Mount Count: 20
        State: 0   Errors: 0
        Check Interval: 0   Last Check: Sat Jun  6 19:38:12 2015
        Creator OS: 0
        Feature Compat: 3 backup-super strict-journal-super
        Feature Incompat: 16208 sparse extended-slotmap inline-data metaecc
xattr indexed-dirs refcount discontig-bg
        Tunefs Incomplete: 0
        Feature RO compat: 7 unwritten usrquota grpquota
        Root Blknum: 5   System Dir Blknum: 6
        First Cluster Group Blknum: 3
        Block Size Bits: 12   Cluster Size Bits: 12
        Max Node Slots: 2
        Extended Attributes Inline Size: 256
        Label: bnews
        UUID: 8F1C21BF3B09459FB0C667C58AA0B7CB
        Hash: 2948584403 (0xafbfd3d3)
        DX Seed[0]: 0x38f8f950
        DX Seed[1]: 0x034edae5
        DX Seed[2]: 0xea4f0da9
        Cluster stack: classic o2cb
        Inode: 2   Mode: 00   Generation: 1813982380 (0x6c1f2cac)
        FS Generation: 1813982380 (0x6c1f2cac)
        CRC32: 08e81acd   ECC: 01dd
        Type: Unknown   Attr: 0x0   Flags: Valid System Superblock
        Dynamic Features: (0x0)
        User: 0 (root)   Group: 0 (root)   Size: 0
        Links: 0   Clusters: 131071744
        ctime: 0x5572f7c4 -- Sat Jun  6 19:38:12 2015
        atime: 0x0 -- Thu Jan  1 06:00:00 1970
        mtime: 0x5572f7c4 -- Sat Jun  6 19:38:12 2015
        dtime: 0x0 -- Thu Jan  1 06:00:00 1970
        ctime_nsec: 0x00000000 -- 0
        atime_nsec: 0x00000000 -- 0
        mtime_nsec: 0x00000000 -- 0
        Refcount Block: 0
        Last Extblk: 0   Orphan Slot: 0
        Sub Alloc Slot: Global   Sub Alloc Bit: 65535

OS: Ubuntu Precise

~# dpkg -l | grep ocfs
ii  ocfs2-tools                         1.6.4-3ubuntu1
/dev/xvdb1              /srv/www                ocfs2   _netdev,defaults 0 0


Why it can be incompatible and how to solve this?

Thanks in advance.
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