|
osdir.com mailing list archive |
|
Subject: Re: Ang: Re: iSCSI Target Performance with Multiple Initiators - msg#00223List: linux.iscsi.iscsi-target.devel> 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. > > > > > __________________________________________ > Yahoo! DSL â Something to write home about. > Just $16.99/mo. or less. > dsl.yahoo.com > ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_idv37&alloc_id865&op=click Thread at a glance:
Previous Message by Date: click to view message previewRe: Ang: Re: iSCSI Target Performance with Multiple InitiatorsHi 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. __________________________________________ Yahoo! DSL ? Something to write home about. Just $16.99/mo. or less. dsl.yahoo.com ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click Next Message by Date: click to view message previewCompile error on 2.6.14-r5 (gentoo)Hi All Just updated from 2.6.12 to 2.6.14 on gentoo. When I compile iscsitarget now, I get the following: CC [M] /root/iscsitarget-0.4.12/kernel/event.o In file included from /root/iscsitarget-0.4.12/kernel/event.c:11: /root/iscsitarget-0.4.12/kernel/iscsi_dbg.h:39:5: warning: "D_IOV" is not defined /root/iscsitarget-0.4.12/kernel/iscsi_dbg.h:51:5: warning: "D_DUMP_PDU" is not defined /root/iscsitarget-0.4.12/kernel/event.c: In function `notify': /root/iscsitarget-0.4.12/kernel/event.c:74: error: too few arguments to function `__nlmsg_put' make[2]: *** [/root/iscsitarget-0.4.12/kernel/event.o] Error 1 make[1]: *** [_module_/root/iscsitarget-0.4.12/kernel] Error 2 make[1]: Leaving directory `/usr/src/linux-2.6.14-gentoo-r5' make: *** [mods] Error 2 Note that I've already applied the one line patch to netlink_kernel_create to fix an earlier build problem. Could anyone help me with this? Cheers, James -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click Previous Message by Thread: click to view message previewRe: Ang: Re: iSCSI Target Performance with Multiple InitiatorsHi 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. __________________________________________ Yahoo! DSL ? Something to write home about. Just $16.99/mo. or less. dsl.yahoo.com ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click Next Message by Thread: click to view message previewRe: Ang: Re: iSCSI Target Performance with Multiple InitiatorsMing, thanks for the clarification :) --- Ming Zhang <mingz@xxxxxxxxxxx> wrote: > 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. > > > > > > > > > > > > > __________________________________________ > > Yahoo! DSL â?? Something to write home about. > > Just $16.99/mo. or less. > > dsl.yahoo.com > > > > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click Loading Comments...
|
|
