Re: How long does an I/O take (very roughly)?

...@bama.ua.edu] On Behalf Of Hal Merritt Sent: Wednesday, January 06, 2010 9:14 AM To: IBM-MAIN@bama.ua.edu Subject: Re: [IBM-MAIN] How long does an I/O take (very roughly)? Ignoring a lot and oversimplifying, I believe that modern DASD should routinely deliver 0.1ms (hit) and 1ms (miss

How long does an I/O take (very roughly)?

Hi, I'm about to update a chart I'm using to illustrate the relative speed of various actions like CP cycle, storage access, etc. Does it still hold true that an I/O from controller cache (cache hit) takes about 1ms and and I/O from the platter (cache miss) takes about 5ms. All I want is two

Re: How long does an I/O take (very roughly)?

With a DS8300 Turbo, my overall average response time is around 1ms. It looks to me like a cache hit is a little less than .5ms, with less than .300ms of connect time. Hunkeler Peter (KIUP 4) peter.hunke...@credit-suisse.com 1/6/2010 11:07 AM Hi, I'm about to update a chart I'm using to

Re: How long does an I/O take (very roughly)?

To: IBM-MAIN@bama.ua.edu Subject: How long does an I/O take (very roughly)? Hi, I'm about to update a chart I'm using to illustrate the relative speed of various actions like CP cycle, storage access, etc. Does it still hold true that an I/O from controller cache (cache hit) takes about 1ms