On Fri, Dec 11, 2009 at 01:20:43PM -0500, Trond Myklebust wrote: > On Fri, 2009-12-11 at 23:39 +0530, Tharindu Rukshan Bamunuarachchi > wrote: > > then why is it 90 by default ... is it RFC/Protocol requirement ? > > The purpose of the grace period is to give the clients enough time to > notice that the server has rebooted, and to reclaim their existing locks > without danger of having somebody else steal the lock from them. > > It is not a protocol requirement, but it is definitely a strongly > recommended feaature if you don't want to see corruption in your > mailbox/database/logfile/... that relies on those locks. There are a few things we could do to lessen the pain of the grace period, though--such as ending it when we know it's done. (In the v4 case, that's just when we know there are no clients to recover state; in the v4.1 case, that's when all the RECLAIM_COMPLETE's are done.) I'm hoping to work on that for 2.6.34. --b. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
