Hi, today I did some benchmarks. I used the old FC4700 system on the backup mail server. I created a new file system (ext2;ext3;jfs), untar 2 folders with ~10k files and unmounted the device.
Now I mounted the device again, switched
onto the mount point and did 3 times
time find . -type f -exec cat {} > /dev/null \;
First one is directly from disk, the two other
runs are running more ore less from cache.
This procedure was repeated three times.
My conclusions are: The file system is fragmented. On the
original location one folder with 5k files took nearly
2 minutes and on the newly created FS 23sec. !
Can I check the theory ?
Is the only way to solve this issue, tar everything and
create a new file system and copy ever file ...
It's a factor of 10 ......
Bye, Peer
------------------------
Mount
Ext2 25,348 4,960 8,800
12,042 4,310 7,170
Dito
umount;mount
19,548 4,770 8,370
12,149 4,390 7,580
11,880 4,330 7,120
umount;mount
19,670 4,590 8,850
11,941 4,510 7,000
11,731 4,600 6,590
EXT3 25,378 4,580 8,660
12,087 4,600 7,080
12,125 4,270 7,280
umount;mount
19,633 4,570 8,930
12,186 4,600 7,230
12,419 4,120 7,690
umount;mount
19,586 5,120 9,270
11,873 4,400 6,970
11,875 4,050 7,170
JFS 23,974 4,590 8,750
11,763 4,200 7,030
11,816 4,260 6,930
umount;mount 22,825 4,640 8,400
11,862 4,400 6,860
11,706 4,390 6,580
--
Mit freundlichem Gruss
Peer-Joachim Koch
_________________________________________________________
Max-Planck-Institut fuer Biogeochemie
Dr. Peer-Joachim Koch
Hans-Knöll Str.10 Telefon: ++49 3641 57-6705
D-07745 Jena Telefax: ++49 3641 57-7705
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