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 : > __ > please use the "List-Reply" function of your email client. > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user >