On Wed, Dec 30, 2009 at 09:27:22AM +1100, ronnie sahlberg wrote: > yes, > one login for each thread. > Ok. Sounds like a good tool to measure performance. -- Pasi > > On Wed, Dec 30, 2009 at 8:35 AM, Pasi Kärkkäinen <pasik@xxxxxx> wrote: > > 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@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe stgt" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
