Will prestoserve help a client

[Marcus J. Ranum]

pcg at test.aber.ac.uk (Piercarlo Antonio Grandi) writes:

>Rethorical question: how many megabytes of extra disk buffer cache on
>the client or server can you buy for the cost of one NFS accelerator?

Straight-man answer:
	Since the bottleneck is usually writes, especially with NFS,
added cache in the client won't help much if you do any writes (unless
you're paging a lot, in which case paging == writes, and adding memory
will reduce writes). Since writes on the server are also synchronous,
adding extra disk buffer cache will only improve your read times, not
your write times.

Rhetorical answer:
	How much local disk can you buy for the cost of all that memory?
If performance is your problem, and you're doing writes, NFS should probably
not be part of your solution.


mjr.
-- 

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