Date: Sun, 19 Jun 2005 07:42:16 +0300 From: Lefteris Tsintjelis <lefty@ene.asda.gr> To: Giorgos Keramidas <keramida@ceid.upatras.gr> Cc: freebsd-questions@freebsd.org Subject: Re: Can't mount partitions with soft-updates enabled with async option Message-ID: <42B4F7A8.87B4AEA6@ene.asda.gr> References: <42B481D0.EFA31599@ene.asda.gr> <20050618203437.GA1966@gothmog.gr>
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Giorgos Keramidas wrote: > > Why would you want to do that? > > Soft-updates already provides most of the benefits of an async mount plus some > extra goodies, like never leaving the filesystem in an inconsistent state. Kalimera Giorgo, For boosting io speed to the max it can get. The system is very stable (no crashes whatsover) and UPS monitored and protected so chances of having an inconsistent filesystem are very low or am I wrong? (I am refering to an async mounted filesystem) > The speed gain of mounting a squid cache as async shouldn't really be that > big, but the guarantees of avoiding data loss when a filesystem is mounted > with softupdates are too big to ignore :-) Well, that would probably depend on the requests per second but for a pretty busy squid box (disk cache is already split to a few disks) and to keep things running even more smooth and optimal, this would probably boost the io performance further more (if I understood everything right). The reason I am thinking of switching to async mode is that I am getting some physical io page faults (very small percentage compared to the requests per second but still) and I am already using the noatime option with soft-updates of course.
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