On Fri, Sep 25, 2009 at 02:39:59PM +1000, ronnie sahlberg wrote: > List, > > You might find this tool useful. > I recently added very simple iscsi support to DBENCH ( http://dbench.samba.org ) > so that dbench has a minimal iscsi initiator built in. > > This is sometimes useful since it allows to bypass any iscsi initiator > layer, like open-iscsi, on the host and to get full control of exactly > what commands will be issued to the target and accurate measures since > one can know that the data was served across the network and not from > a local cache. > It is also useful since it can generate very high loads, much higher > than I have been anble to generate by doing i/o through a lun mapped > through the built in initiator in linux. > > Here i am mainly interested in high load for very small i/o sizes. I > use 1k i/o size in my tests to be as pathological in my tests as > possible. But you can run tests with any i/o size. > > > The basic syntax is : > > $ ./dbench -B iscsi --loadfile=iscsi.txt --iscsi-lun=1 > --iscsi-portal=10.0.0.71 --iscsi-port=3260 > --iscsi-target=iqn.2007-03:mptest --warmup=0 --run-once 1 > > to run the loadfile once and then exit and with 1 client. > > or > > $ ./dbench -B iscsi --loadfile=iscsi.txt --iscsi-lun=1 > --iscsi-portal=10.0.0.71 --iscsi-port=3260 > --iscsi-target=iqn.2007-03:mptest --warmup=0 --timelimit=5 10 > > to run the loadfile over and over until the time runs out and using > 10 threads of execution. > Will it make 10 logins to the iSCSI target, one login for each thread? -- Pasi -- To unsubscribe from this list: send the line "unsubscribe stgt" in the body of a message to majordomo at vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html |