20 Jun
2013
20 Jun
'13
10:58 a.m.
On 6/20/2013 12:48 PM, Tom Gardner wrote:
Second posting since for some reason the first posting
apparently didn't
make it.
-----Original Message-----
From: Tom Gardner [mailto:tom94022 at comcast.net]
Sent: Monday, June 17, 2013 10:07 AM
To: 'cctalk at classiccmp.org'
Subject: RE: Early UNIX File Optimization
I have a vague recollection that early time sharing systems, in particular
UNIX, enforced I/O fairness by fragmenting files and thereby freeing the I/O
between fragments. However I don't recall much and this might be an
artifact of aging :-)
If so, I am curious as to how this was implemented - interleaving sectors or
some more complex physical fragmentation or ??
Anyone point me to any references?
Tom
Someone already responded to your earlier post, which made it to the
list. Check the archives.
--
Jim Brain
brain at jbrain.com
www.jbrain.com