[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Netbooted bands run slower?
Date: Tue, 15 May 90 07:23 PDT
From: Kalman Reti <Reti@STONY-BROOK.SCRC.Symbolics.COM>
In fact, from a fragmenting perspective things should be the other way around.
It is possible to create an incredibly fragmented world file (just copy a band
while slowly writing another file on the same FEP unit, each will get alternating
8 block chunks of the disk), but all the standard methods for creating paging
files that I can think of allocate the blocks at once, thereby getting the best
non-fragmentation that the current state of the disk has to offer.
I don't think copying a band would create a fragmented world as you
describe. I think the band transfer software creates a destination FEP
file of the appropriate size at the beginning of the transfer.
I'd look at your user's paging files by running SI:PRINT-FEP-FILESYSTEM to see
if they actually are badly fragmented. Within Symbolics lots of people routinely
run netbooted worlds and no one has reported a similar performance loss.
Thanks for the suggestion.