Re: After Sieve plugin errors

["M.Atıf CEYLAN" <mehmet@atifceylan.com>]

On 08/07/2013 04:48 PM, emmanuel segura wrote:

This workaround is not for you, man mkfs.ocfs2 and look the option

      -T filesystem-type
              Specify how the filesystem is going to be used, so that mkfs.ocfs2 can chose optimal filesystem parameters for that use.  The  supported  filesystem  types
              are:

                   mail   Appropriate for file systems that will host lots of small files.

                   datafiles
                          Appropriate for file systems that will host a relatively small number of very large files.

                   vmstore
                          Appropriate for file systems that will host Virtual machine images.

2013/8/7 "M.Atıf CEYLAN" <mehmet@atifceylan.com>

Count: 243   Next Free Rec: 243
 ##   Total        Used         Free         Block#
        0    4096         4096         0            7878657
        1    4096         4096         0            11997697
        2    4096         4095         1            12126721
        3    4096         4095         1            12158977
        4    4096         4094         2            933889
        5    4096         4096         0            326657
        6    4096         4096         0            327681
        7    4096         4096         0            12417025
        8    4096         4094         2            329729
        9    4096         4091         5            1224193
        10   4096         4090         6            1288705
        11   4096         4089         7            1320961
        12   4096         4096         0            1385473
        13   4096         4096         0            1449985

Perhaps, I must increase the cluster size of ocfs2 :(
Is the discontig-bg a workaround for me? If it's a workaround I'll make creation new volumes with big block size and move the data to there.

What is your suggestion to me for mkfs.ocfs2 params? Journal size, cluster size etc.?
(I have 6 volumes and each size is 140GB)

I have tried with the "-C 32K" parameter. But the result was bad than before. http://www.novell.com/support/kb/doc.php?id=7008696 it says : " In conjunction with fragmentation, the filesystem may run out of a contiguous block to alloc for extent_alloc blocks leading to "out of space" errors. This is an OCFS2 limitation, and the problem happens only when creating large files on file system with small Cluster Size." I have many small files (millions of files) on all volumes.

When I try with (http://oss.oracle.com/~seeda/misc/stat_sysdir.sh) this script on old volumes I don't see any space problem.
some results of output of the script.

//global_bitmap
   ..................................
    Bitmap Total: 44564302   Used: 27804345   Free: 16759957
    Clusters per Group: 32256   Bits per Cluster: 1
    Count: 243   Next Free Rec: 243
    ##   Total        Used         Free         Block#
    0    193536       130058       63478        15676416
    1    193536       120736       72800        23546880
    2    193536       126088       67448        15740928
    3    193536       130184       63352        15773184
    4    193536       120517       73019        15805440
    5    193536       115267       78269        31514112
    6    193536       120907       72629        15869952
..................................................
Group Chain: 0   Parent Inode: 11  Generation: 3256184013
    CRC32: 00000000   ECC: 0000
    ##   Block#            Total    Used     Free     Contig   Size 
    0    15676416          32256    15098    17158    503      4032 
    1    7838208           32256    31432    824      511      4032 
    2    3                 32256    32256    0        0        4032 
    3    23514624          32256    17874    14382    446      4032 
    4    31352832          32256    15440    16816    507      4032 
    5    39191040          32256    17958    14298    479      4032
...................................................
 //global_inode_alloc
    Sub Alloc Slot: Global   Sub Alloc Bit: 4
    Bitmap Total: 269   Used: 32   Free: 237
    Clusters per Group: 269   Bits per Cluster: 1
    Count: 243   Next Free Rec: 1
    ##   Total        Used         Free         Block#
    0    269          32           237          4

    Group Chain: 0   Parent Inode: 8  Generation: 3256184013
    CRC32: 00000000   ECC: 0000
    ##   Block#            Total    Used     Free     Contig   Size 
    0    4                 269      32       237      237      4032


However I want to try with "--fs-features=discontig-bg" but I use squeeze with 2.6.32 kernel. So this feature is not supported by the running kernel (or I couldn't run it).

M.Atıf CEYLAN
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