Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
ok I have here added my iozone results.
I am just new to this drbd maybe a month or two. Does anyone have the
standard benchmark results for drbd or where can i find it? I am
really worried about the write performance on our drbd, the difference
is just too big and much more is if it is now under NFS and samba.
LVM2 + XFS
File size set to 4096 KB
Record Size 4 KB
SYNC Mode.
Include fsync in write timing
Include close in write timing
Command line used: ./iozone -s4m -r4k -o -e -c
Output is in Kbytes/sec
Time Resolution = 0.000001 seconds.
Processor cache size set to 1024 Kbytes.
Processor cache line size set to 32 bytes.
File stride size set to 17 * record size.
random
random bkwd record stride
KB reclen write rewrite read reread read
write read rewrite read fwrite frewrite fread freread
4096 4 11680 35386 1126176 1158032 926910
34997 939673 35074 907599 64502 68108 1016369 1079917
LVM2 + DRBD + XFS
File size set to 4096 KB
Record Size 4 KB
SYNC Mode.
Include fsync in write timing
Include close in write timing
Command line used: ./iozone -s4m -r4k -o -e -c
Output is in Kbytes/sec
Time Resolution = 0.000001 seconds.
Processor cache size set to 1024 Kbytes.
Processor cache line size set to 32 bytes.
File stride size set to 17 * record size.
random
random bkwd record stride
KB reclen write rewrite read reread read
write read rewrite read fwrite frewrite fread freread
4096 4 619 5138 520068 516903 460170
2494 459762 4503 461883 10358 9790 1021212 1003702
thanks, warren
On 7/8/05, Lars Ellenberg <Lars.Ellenberg at linbit.com> wrote:
> / 2005-07-07 20:18:06 +0800
> \ Warren Beldad:
> > Hi all!
> >
> > I have are a simple results of the performance of my drbd test machines.
> > Using the dd command, first I get the performance value of my
> > harddisk. That would be formatting the /dev/sda with XFS and then
> > mount it and then write a 1GB file (which is twice the size of my RAM)
> > into that disk with dd command on different block sizes and then read
> > back that file into the black hole.
> > time dd if=/dev/zero of=testfile.txt bs=512k count=2000
> > time dd if=testfile.txt of=/dev/null bs=512k
>
> your benchmark is broken.
> man close
> man fsync
> no, dd does not do fsync.
>
> --
> : Lars Ellenberg Tel +43-1-8178292-0 :
> : LINBIT Information Technologies GmbH Fax +43-1-8178292-82 :
> : Schoenbrunner Str. 244, A-1120 Vienna/Europe http://www.linbit.com :
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