Hi everybody. Given the price of memory these days, I am considering
doing away with disk-based caches on our Unix platforms and replacing
them with memory caches. I've run some preliminary tests, but I would
like to compare notes with some of you who have tried (or are using)
similar configurations.
- Does a memory-based cache guarantee that the pages won't get
swapped out?
- How much performance improvement have you seen on this?
- What configurations have you tried (mounting a memory
filesystem on /usr/vice/cache vs. using the Transarc memory
cache mechanism vs. ????)
What I would like to hear are some of the factors that have caused
people to use or reject this route. I couldn't find anything in the
info-afs archives, possibly because the favorable cost of memory is a
'new' phenomenon.
Cache persistence (across reboots) isn't an issue for us - our uptime
is usually on the order of weeks, so general activity does more to
flush a cache than an occasional reboot.
--
David Thompson <[EMAIL PROTECTED]>
Associate Researcher Department of Computer Science
University of Wisconsin-Madison http://www.cs.wisc.edu/~thomas
1210 West Dayton Street Phone: (608)-262-1017
Madison, WI 53706-1685 Fax: (608)-262-6626
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