On Thu, Oct 15, 2009 at 03:25:15PM -0400, David Dillow wrote: > On Thu, 2009-10-15 at 09:23 -0700, Vu Pham wrote: > > David Dillow wrote: > > > And if I want to disable this completely? > > > > > > > Unless these patches are bad and affect the stability of the driver, why > > do you want to disable it? If you don't use multipath/device-mapper and > > use /dev/sd**, everything will be same > > I use multipath with ALUA, and I don't mind if the link flaps a bit. 60 > seconds is near my SCSI timeout of 77 seconds, so it doesn't buy me > much. I'd rather multipath be delivering traffic to the backup path than > sitting on its thumbs for 60 seconds doing nothing.
I've been left with a similar impression for several multipath things I've seen in the past. True active/active multipath setups should have a shorter timeout - there is no penalty for directing more traffic to the 2nd path (the paths should be load balancing existing traffic in the standard case anyhow). An active/passive configuration might be different... Certainly an enforced lower limit in the kernel is silly, and a per-device setting does make some sense. Jason -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
