https://open.datacore.ch/DCwiki.open/Wiki.jsp?page=GFS.Bonnie
Version 1.03 - - - Sequential Output - - - --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
System2-GNBD-GFS 1G 4190 27 7185 11 2777 5 4165 26 5029 4 96.4 3
- - - Sequential Create - - - - - - - Random Create - - - -
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 262 38 12996 35 147 11 203 31 557 7 150 12*
We use Infiniband and we are getting around 35MB/s (SCSI raid 5/SGI TP9100).*
Bonnie 1.4: File './Bonnie.8320', size: 1048576000, volumes: 1 Writing with putc()... done: 34619 kB/s 90.6 %CPU Rewriting... done: 459206 kB/s 99.6 %CPU Writing intelligently... done: 213785 kB/s 41.5 %CPU Reading with getc()... done: 35544 kB/s 100.0 %CPU Reading intelligently... done: 1066698 kB/s 100.0 %CPU
I guess you should get a similar performance over Gigabit.
For comparison, our Infiniband network provides only around 2 times the bandwith over TCP/IP
(1800 Mb/s) than our GB network (800Mb/s).
Marcelo
Jacob Joseph wrote:
Hi. I run a very similar dual opteron cluster here at CMU and would be very interested in any responses you might have recieved off of the list. Additionally, do you happen to know of any benchmarks of gnbd performance over gigabit?
Thanks, -Jacob
Marcelo Matus wrote:
Dear GFS list members:
We are planning to install GFS in our new Dual Opteron cluster (20 nodes, ie 40cpus) and probably to serve some workstation (another 10-20), considering one GFS server and using gndb.
I have seen in the list that there were some problems for more than 10 nodes, but now that is fixed.
Still, the question is, does someone has experience with ~40 clients + 1 GFS server?, is that too much?
Marcelo
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