I/O

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4 total messages Started by Peter W. Brewer Wed, 13 Jun 1990 23:20

#185

Author: Peter W. Brewer
Date: Wed, 13 Jun 1990 23:20

24 lines
1431 bytes

In article <6662@amelia.nas.nasa.gov> eugene@wilbur.nas.nasa.gov (Eugene N. Miya) writes:
>In article <39284@mips.mips.COM> mash@mips.COM (John Mashey) writes:
>
>>1) I/O will always be a problem, for all of the usual design reasons,
>
>	"When you can give me disks which rotate significantly
>	faster than 3600 RPM, then we can start talking."
>				--Don Senzig
>
Time for wide, short, dense, and durable tapes.. tape media holds more than 
optical disks, and winchesters and can be made faster and virtually random...

I think Seymour spoke about the future of tapes once upon a time.. CDs.. nope
the holes can only be so small, better tape technology beats 'em. Where is
Nakimichi when you need them ;-)

	Peter


-- 
Peter Brewer             ||||     |||||  |||||||||  ||||||  //|||||\  ||||||
lerici@super.org	 ||       ||__   ||     ||    ||   ||           ||
THE Supercomputing       ||       ||     ||^^^^^^\\   ||   ||           ||
Research Center ~~~      |||||||| |||||  ||       || |||||  \\|||||/  ||||||

Re: I/O (storage, not access)

#186

Author: Eugene N. Miya
Date: Thu, 14 Jun 1990 00:58

14 lines
1182 bytes

In article <27502@metropolis.super.ORG>
lerici@metropolis.UUCP (Peter W. Brewer) writes:
>Time for wide, short, dense, and durable tapes.. tape media holds more than 
>optical disks,

The ILLIAC IV had such a optical tape unit in 1975. There are scattered
samples of the material around.  The company went out of business
before delivering.  The tape were optical strips about 4 inches wide
and maybe 3 feet long.  Problems were mechanical, handling.

Does any one really need the name of the company?  I can ask Ken Stevens.

--e. nobuo miya, NASA Ames Research Center, eugene@orville.nas.nasa.gov
  {uunet,mailrus,other gateways}!ames!eugene

Re: I/O

#187

Author: Dan Cummings
Date: Fri, 15 Jun 1990 00:01

17 lines
1090 bytes


Advances in I/O performance will lag behind advances in CPU speed for
some time to come but there is rather a lot that can be done with 
current technology and current 3600 RPM disks to improve I/O performance.
Just as a start I would refer interested parties to the papers coming
from John Ousterhout and his group at UC Berkeley on Log Structured File
Systems and RAIDs (Redundant Array of Inexpensive Disks).   After
digesting all of this information I invite you to come up to Seattle
and see what we are doing at Tera Computer for high speed I/O.   
Another good stab at increasing I/O speed is found in the LD cache
approach used in Unicos on the Cray YMP.

Don't give up yet!

Dan Cummings
doc@tera.com

Re: I/O

#189

Author: Greg Hinton
Date: Sat, 16 Jun 1990 16:44

14 lines
892 bytes

In article <1990June14.645408090@tera.com> doc@tera.com (Dan Cummings) writes:
> [ . . . . ]
>Just as a start I would refer interested parties to the papers coming
>from John Ousterhout and his group at UC Berkeley on Log Structured File
>Systems and RAIDs (Redundant Array of Inexpensive Disks).
> [ . . . . ]

Can someone post a bibliography of papers on these topics?
Thanks.
-- 

Greg Hinton
DOMAIN: hinton@netcom.uucp
UUCP: uunet!apple!netcom!hinton

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