Another related observation and some questions; I am using open iscsi on init with IET on trgt over a single 10gbps link
There are three ip aliases on each side I have 3 ramdisks exported by IET to init I do iscsi login 3 times, once using each underlying ip address and notice that each iscsi session sees all 3 disks. Is it possible to restrict such that each init only sees one separate disk? When I run fio on each mounted disk, I see that only two underlying tcp sessions are being used - that limits the perf. Any ideas on how to overcome this? Thanks! Sent from my iPhone On Aug 26, 2014, at 12:53 PM, "Mark Lehrer" <m...@knm.org> wrote: > On Tue, 26 Aug 2014 08:58:46 -0400 Alvin Starr <al...@iplink.net> wrote: >> >>>> I am trying to achieve10Gbps in my single initiator/single target >>>> env. (open-iscsi and IET) >>> >>> On a semi-related note, are there any good guides out there to >>> tuning Linux for maximum single-socket performance? On my 40 gigabit >> >> You are likely getting hit by the bandwidth-delay product. >> Take a look at http://en.wikipedia.org/wiki/Bandwidth-delay_product >> and http://www.kehlet.cx/articles/99.html > > Thanks that helped get my netcat transfer up over 500MB/sec using IPoIB. > Unfortunately that is still only about 10% of the available bandwidth. > > I'll keep on tweaking and see how far I can take it. > > Thanks, > Mark > > -- > You received this message because you are subscribed to the Google Groups > "open-iscsi" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to open-iscsi+unsubscr...@googlegroups.com. > To post to this group, send email to open-iscsi@googlegroups.com. > Visit this group at http://groups.google.com/group/open-iscsi. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
