I have a few ZFS servers (OI and OmniOS) that are fibre Channel targets. I use the qLogic 2562 8g dualport FC HBA card in all of them with great success.
One of my systems is similar to yours, with 2 x (12 x 4T SAS) attached via a LSI 9207-8e SAS HBA. I am able to saturate both 8gb fibre channel connections with a single host. My target is a Sun/Oracle T4 system running Oracle Solaris 10 also with a qLogic 2562. I generally use a small block size (8k) since I only use these servers for an Oracle RDBMS 12c database. I use the Oracle ASM filesystem on the target side. I've never tried to mount to a Windows server before with my setup. You didn't mention if you had a SSD for ZIL, but you might want to try disabling the ZIL and seeing if that helps your performance. You can also monitor what the ZIL is doing with a great little program written by Richard Elling. http://www.richardelling.com/Home/scripts-and-programs-1/zilstat With this you can monitor the ZIL writes - it should help to figure out if that is your problem or not. Good luck! thanks, liam On Thu, Sep 4, 2014 at 1:29 AM, Mark <mark0...@gmail.com> wrote: > Does anyone have experience with Comstar as a Fibre Channel Target ? > > I build one some years ago, which ran really well, but my latest effort is > disappointing. > > Throughput is abysmal, only reaching about 20 Mbytes/sec depending on > block size. > > Zpool is raidz with 30 x 4Tb SAS disk attached to a 6G SAS IT controller. > Local disk throughput reaches over 400 Mbytes/sec. > > > The Initiator is Windows 2012 with Qlogic 8G adapter, and Qlogic 4G at the > OI end, with straight cable. > > It works, no errors I can find, but performance just sucks. > > In desperation, I'm about to try swapping the Qlogic for an Emulex HBA. > > Can anyone offer suggestions on identifying possible causes ? > > Mark. > > > > _______________________________________________ > openindiana-discuss mailing list > openindiana-discuss@openindiana.org > http://openindiana.org/mailman/listinfo/openindiana-discuss > _______________________________________________ openindiana-discuss mailing list openindiana-discuss@openindiana.org http://openindiana.org/mailman/listinfo/openindiana-discuss
