[Ocfs2-users] OCFS2 performance - disk random access time problem

[Proskurin Kirill]

Hello.

I plan to use OCFS2 + DRBD for email server.

Problem:
I use "seeker"  for testing
http://www.linuxinsight.com/how_fast_is_your_disk.html

And get this:
Results: 65 seeks/second, 15.23 ms random access time
Then I do rm of many files - it fals to 10 seeks/second and performance 
is terrible.

What can I do to increase it? What`s wrong?

Below is many info.

What we have:
Debian lenny 2.6.26-2-amd64
ocfs2-tools 1.4.1-1
drbd8-2.6.26-2-amd64  2:8.3.7-1~bpo50+1+2.6.26-21lenny4
drbd8-source                 2:8.3.7-1~bpo50+1
drbd8-utils                     2:8.3.7-1~bpo50+1

debugfs.ocfs2 -R "stats" /dev/drdb0
         Revision: 0.90
         Mount Count: 0   Max Mount Count: 20
         State: 0   Errors: 0
         Check Interval: 0   Last Check: Fri Mar 26 11:54:41 2010
         Creator OS: 0
         Feature Compat: 1 BackupSuper
         Feature Incompat: 16 Sparse
         Tunefs Incomplete: 0 None
         Feature RO compat: 1 Unwritten
         Root Blknum: 17   System Dir Blknum: 18
         First Cluster Group Blknum: 8
         Block Size Bits: 12   Cluster Size Bits: 15
         Max Node Slots: 2
         Label: ocfs2_drbd0
         UUID: 75507E99756D4AE986337FD09BC7B2E1
         Cluster stack: classic o2cb
         Inode: 2   Mode: 00   Generation: 140519344 (0x86027b0)
         FS Generation: 140519344 (0x86027b0)
         Type: Unknown   Attr: 0x0   Flags: Valid System Superblock
         User: 0 (root)   Group: 0 (root)   Size: 0
         Links: 0   Clusters: 27476584
         ctime: 0x4baca081 -- Fri Mar 26 11:54:41 2010
         atime: 0x0 -- Thu Jan  1 00:00:00 1970
         mtime: 0x4baca081 -- Fri Mar 26 11:54:41 2010
         dtime: 0x0 -- Thu Jan  1 00:00:00 1970
         ctime_nsec: 0x00000000 -- 0
         atime_nsec: 0x00000000 -- 0
         mtime_nsec: 0x00000000 -- 0
         Last Extblk: 0
         Sub Alloc Slot: Global   Sub Alloc Bit: 65535

/etc/init.d/o2cb status
Driver for "configfs": Loaded
Filesystem "configfs": Mounted
Stack glue driver: Loaded
Stack plugin "o2cb": Loaded
Driver for "ocfs2_dlmfs": Loaded
Filesystem "ocfs2_dlmfs": Mounted
Checking O2CB cluster ocfs2: Online
Heartbeat dead threshold = 31
   Network idle timeout: 15000
   Network keepalive delay: 2000
   Network reconnect delay: 2000
Checking O2CB heartbeat: Active

dmesg | grep -i ocfs2
[   18.821010] OCFS2 Node Manager 1.5.0
[   18.826429] OCFS2 DLM 1.5.0
[   18.829955] ocfs2: Registered cluster interface o2cb
[   18.849955] OCFS2 DLMFS 1.5.0
[   18.849955] OCFS2 User DLM kernel interface loaded
[  304.329154] OCFS2 1.5.0

OCFS2 mount options:
nodev,noauto,noatime,data=writeback

Nodes connected via 1Gbit\s LAN.
HDD is SATA Raptor 10k RPM.

Mail storage is 260Gb with 4 million files(maildir)

cat /proc/meminfo
MemTotal:      4058444 kB
MemFree:       3014752 kB
Buffers:        585544 kB
Cached:          71036 kB
SwapCached:          0 kB
Active:         326432 kB
Inactive:       553292 kB
SwapTotal:     1951856 kB
SwapFree:      1951164 kB
Dirty:             172 kB
Writeback:           0 kB
AnonPages:      223136 kB
Mapped:          15820 kB
Slab:           100492 kB
SReclaimable:    89588 kB
SUnreclaim:      10904 kB
PageTables:       4632 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
WritebackTmp:        0 kB
CommitLimit:   3981076 kB
Committed_AS:   457124 kB
VmallocTotal: 34359738367 kB
VmallocUsed:    279904 kB
VmallocChunk: 34359458171 kB
HugePages_Total:     0
HugePages_Free:      0
HugePages_Rsvd:      0
HugePages_Surp:      0
Hugepagesize:     2048 kB

-- 
Best regards,
Proskurin Kriill