Date: Mon, 03 Apr 1995 14:29:29 EDT From: "Kaleb S. KEITHLEY" <kaleb@x.org> To: hackers@freefall.cdrom.com Subject: Re: any interest? Message-ID: <9504031829.AA29976@fedora.x.org>
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> >The usual way under SunOS is 'mkfile 4m /some/file'. This way
> >no disk blocks are allocated until they are actually needed.
> >Here is a clone implementation of mkfile, done by Robert Claeson
> >(prc@erbe.se).
>
> Swapfiles should be pre-allocated to maximize contiguousness.
I don't agree that disk blocks aren't allocated until needed. Here's
an excerpt from the man page:
MKFILE(8) MAINTENANCE COMMANDS MKFILE(8)
NAME
mkfile - create a file
SYNOPSIS
mkfile [ -nv ] size[k|b|m] filename ...
DESCRIPTION
mkfile creates one or more files that are suitable for use
as NFS-mounted swap areas, or as local swap areas. The
sticky bit is set, and the file is padded with zeroes by
default. The default size is in bytes, but it can be
flagged as kilobytes, blocks, or megabytes, with the k, b,
or m suffixes, respectively.
OPTIONS
-n Create an empty filename. The size is noted, but disk
blocks aren't allocated until data is written to them.
--
Kaleb KEITHLEY
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