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)" <[email protected]> 1/6/2010 11:07 >>> AM >>> 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 very rough figures. I don't want to consider different hardware or attachement types. -- Peter Hunkeler CREDIT SUISSE AG ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html CONFIDENTIALITY/EMAIL NOTICE: The material in this transmission contains confidential and privileged information intended only for the addressee. If you are not the intended recipient, please be advised that you have received this material in error and that any forwarding, copying, printing, distribution, use or disclosure of the material is strictly prohibited. If you have received this material in error, please (i) do not read it, (ii) reply to the sender that you received the message in error, and (iii) erase or destroy the material. Emails are not secure and can be intercepted, amended, lost or destroyed, or contain viruses. You are deemed to have accepted these risks if you communicate with us by email. Thank you. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
