At Sat, 29 Jul 2006 20:07:12 -0500, Phil Brutsche wrote: > > Greg A. Woods wrote: > > not yet in smart controllers that simply make it look like a more > > traditional storage device thus off-loading all the protocol handling > > to a dedicated control processor > > I should point out that those controllers exist, but are rare and have > limited OS support: Adaptec's 7211C gigabit iSCSI HBAs > (http://www.adaptec.com/en-US/products/iscsi/) or QLogic's QLA4050C > iSCSI HBA (http://qlogic.com/products/iscsi_products_hba.asp), for example. That's good to hear! Thanks for the refs. > BTW, like most of Adaptec's other controllers the 7211[CF] is > effectively Windows-only, and the QLogic controller is very likely too > new to work with most platforms Cyrus runs on. It's not that the QLogic > card won't ever work with (say) FreeBSD, it's that FreeBSD's driver's > most likely aren't up-to-date enough to work with the card at this point. I'd be more inclined to think the QLogic card will be supported in *BSD systems sooner than the Adaptec. QLogic do have a good record of making their storage HBAs backwards compatible and their FC cards present a similar enough driver API as their SCSI cards for the same basic code to be used, but yeah I don't see any obvious support for the QL4xxx series cards yet (though there is mention of the 6312 and the 6322 FC-AL adapters). (There are hints around that Wasabi have done a proprietary NetBSD driver for the Adaptec 7211C, and apparently Adaptec's own RedHat drivers do include source code.) > Without one of those cards iSCSI is a CPU hog. Sadly, a second CPU (or > an upgrade to dual-core CPU) is cheaper... Is anyone here running enough concurrent IMAP/SSL connections to know if the SSL overhead chews up enough CPU to conflict with something like un-accellerated iSCSI (i.e. enough to also justify a crypto accellerator, perhaps as well as an iSCSI one)? -- Greg A. Woods H:+1 416 218-0098 W:+1 416 489-5852 x122 VE3TCP RoboHack <woods@xxxxxxxxxxx> Planix, Inc. <woods@xxxxxxxxxx> Secrets of the Weird <woods@xxxxxxxxx> ---- Cyrus Home Page: http://asg.web.cmu.edu/cyrus Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
