On Sun, 2006-01-08 at 10:39 -0800, Rik Herrin wrote:
> Hi Ming,
> In a previous post, I had asked the following
> question:
> >> Are there any issues related to multiple initiators
> accessing the iSCSI target at the same time?
> and your reply was:
> > Mainly depends on u HW, especially u disk.
>
> You then said in your last mail:
> >"iet will not support MC/S."
> Are you referring to multiple connections from the
> same initiator or multiple initiators on different
> PCs? Thanks for your time.
:P
try to give a summary here.
1) multiple ini access different targets on same iet box at same time.
no data concurrency issue. the performance totally depends on your HW.
of course, IET can be improved to support large # of ini better
2) multiple ini access same targets on same iet box at same time. has
data concurrency issue here, so need a clsuter file system or similar
system at client side to coordinate.
3) one ini access different targets on one iet box. it will create
multiple sessions and no data concurrency issue here. performance issue
depends on HW.
all these are MS&OC/S (Multiple Sessions& One Connection per Session)
4) one ini access same target on one iet box.
it might try to use multiple connection in one session (MC/S, Multiple
Connection per Session), but iet doesnot support it and in parameter
negotiation, iet stick to MaxConn=1.
it might try to create multiple sessions with same target (still one
connection per session), which is allowed. usually this is controlled by
client software, for example, linux multi-path.
>
>
>
>
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