Re: iSCSI overhead

2008-12-23 Thread Jerome Martin
I think Rudolph is just asking why doing disk I/Os at 50MB/s translate to 80 to 100MB/s on the wire, aka 60 to 100% overhead in the protocol vs the actual data being transfered. On Tue, Dec 23, 2008 at 3:37 PM, Bart Van Assche wrote: > > On Tue, Dec 23, 2008 at 3:00 PM, wrote: > > Hmmm maybe yo

Re: iSCSI overhead

2008-12-23 Thread Bart Van Assche
On Tue, Dec 23, 2008 at 3:00 PM, wrote: > Hmmm maybe you misunderstood me - a performance improvement would be nice but > that was not the point of my mail: I'm just wondering why there seems to be > such a big overhead on the network while doing synchronus reads and writes to > the iSCSI dev

Re: iSCSI overhead

2008-12-23 Thread rb
- "Bart Van Assche" schrieb: > On Tue, Dec 23, 2008 at 12:21 PM, wrote: > > my storage backend system is capable of handling writes at around > 120MB/sec. Its running > > the iscsi enterprise target under ubuntu hardy and the open-iscsi > initiators are debian etch > > systems, all connect

Re: iSCSI overhead

2008-12-23 Thread Bart Van Assche
On Tue, Dec 23, 2008 at 12:21 PM, wrote: > my storage backend system is capable of handling writes at around 120MB/sec. > Its running > the iscsi enterprise target under ubuntu hardy and the open-iscsi initiators > are debian etch > systems, all connected via gigabit lan. Yesterday I did some

iSCSI overhead

2008-12-23 Thread rb
Hey Folks, my storage backend system is capable of handling writes at around 120MB/sec. Its running the iscsi enterprise target under ubuntu hardy and the open-iscsi initiators are debian etch systems, all connected via gigabit lan. Yesterday I did some load tests and it looks like I won't get