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From: mike@erix.UUCP (Mike Williams)
Newsgroups: comp.unix.wizards
Subject: Swapon (4.{2,3})
Message-ID: <1251@erix.UUCP>
Date: Tue, 9-Dec-86 06:55:25 EST
Article-I.D.: erix.1251
Posted: Tue Dec  9 06:55:25 1986
Date-Received: Wed, 10-Dec-86 11:08:42 EST
Organization: Ericsson Telecom, Stockholm, Sweden
Lines: 36

The normal way to indicate to the system which partitions it should
use for swapping / paging is to put this information in /etc/fstab
and then do a swapon -a in /etc/rc

If you have a system with several disks which have b partitions of
of different sizes and with different performance does the order
in which these partions are put in /etc/fstab have any effect.
Ie should the faster disks come first in the assumtion that they
will be used first?

For example, we have 2 RM05's and an eagle, should the eagle
come first or last? (We have root on an RM05). Would it be
better to have only one big swap partition on the eagle and
none on the slower RM05?

In other words how do the following effect swapping /paging
performance

	order in which swapon is done

	speed of disks

	size of swap partitions

	which disks are on what bus (in are case the eagle is on its own
	mba1 and the RM05 on mba0)

Is there any literature about 4.2 4.3 about this?

Mike Williams
mike@erix.UUCP
...mcvax!enea!erix!mike
Ericsson, 126 25 Stockholm, Sweden

(This question maybe should have been put in comp.unix.questions
but I thought it was more a question for wizards who might otherwise
have missed it)