From mboxrd@z Thu Jan 1 00:00:00 1970 From: Valdis.Kletnieks@vt.edu Date: Tue, 15 Feb 2005 21:21:22 +0000 Subject: Re: Optimizing disk-I/O [was Re: [ANNOUNCE] hotplug-ng 001 release] Message-Id: <200502152121.j1FLLMcP024112@turing-police.cc.vt.edu> MIME-Version: 1 Content-Type: multipart/mixed; boundary="==_Exmh_1108502482_4257P" List-Id: References: <20050215004329.5b96b5a1.diegocg@gmail.com> <20050215195614.GT23424@austin.ibm.com> In-Reply-To: Your message of "Tue, 15 Feb 2005 13:56:14 CST." <20050215195614.GT23424@austin.ibm.com> To: Linas Vepstas Cc: Diego Calleja , Lee Revell , prakashp@arcor.de, paolo.ciarrocchi@gmail.com, gregkh@suse.de, pmcfarland@downeast.net, linux-hotplug-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org --==_Exmh_1108502482_4257P Content-Type: text/plain; charset=us-ascii On Tue, 15 Feb 2005 13:56:14 CST, Linas Vepstas said: > Now I like this idea. It need not have anything to do with startup, > or with any particular program or distro whatsoever. Rather, one > would have a daemon keeping track of disk i/o patterns, and constantly > trying to figure out if there is a rearrangement of the sectors on disk > that would minimize i/o seeks based on past uasge. More prior art - a company called FDR made a disk compactor product for IBM's OS series, and I seem to remember a SHARE (IBM mainframe user group) tape that had a program to read the I/O trace table and generate an optimal "what goes where" command stream for FDR's software. Again a late 70s to early 80s thing. (Probably not enough to be "prior art" by itself, but certainly goes towards the "obviousness to a practitioner in the field" criteria - if *I* knew about it as a junior sysadmin at a college in middle-of-nowhere upstate NY knew about it in 1983.. ;) --==_Exmh_1108502482_4257P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFCEmfScC3lWbTT17ARAsQ8AKCM/Cknozx1DdJCh9dO7fO3jYGCiwCgpQ9K 1lEbhdr6zeW7biyQcZ5YhB8= =3FOR -----END PGP SIGNATURE----- --==_Exmh_1108502482_4257P-- ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ Linux-hotplug-devel mailing list http://linux-hotplug.sourceforge.net Linux-hotplug-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel