The following message is a courtesy copy of an article that has been posted to bit.listserv.ibm-main,alt.folklore.computers as well.
paulgboul...@aim.com (Paul Gilmartin) writes: > Less than two decades ago, I had to work overtime and save money > to afford a 200 MB external SCSI drive, and I had to ride my > bicycle two miles, uphill both ways, to CompUSA to buy it. > You should be grateful that your management allows you to use > 150 times that storage capacity, even temporarily. re: http://www.garlic.com/~lynn/2009q.html#67 Now is time for banks to replace core system according to Accenture http://www.garlic.com/~lynn/2009q.html#68 Now is time for banks to replace core system according to Accenture http://www.garlic.com/~lynn/2009q.html#69 Now is time for banks to replace core system according to Accenture early days of 3380 ... there was a study that showed if full/active 3350s were moved to same amount of space on 3380s ... it would degrade system thruput. the issue was that 3380 space increased by a factor larger than the increase in 3380 arm performance. there was a suggestion floated around SHARE to have a special "fast" 3380 that sold at higher price ... which only had half as much disk space (reducing the amount of space under an arm). it was actually a standard full-sized 3380 with special microcode load that limited access to only half the cylinders. the share claim was this was solution targeted at the bureaucrats that didn't have the discipline to do it on their own (and if they weren't required to pay more ... they wouldn't appreciate it as much). internally we had an application that would take activity profile of existing installation (3330, 3350, etc) and produce a migration strategy that would load-balance the data across pool of 3380s. for 3350 installation ... it was fairly consistent that the 3380s were only loaded to about 80% full ... in order to have the same thruput as the 3350 environment. there was then a bunch of work about doing such activity collection all the time as part of real-time load-balancing allocation & re-organization. my brother recently needed to mail me a large amount of data ... and went out and got a USB terabyte external drive for under $100. I just did quick online check and there are external USB 1.5terabyte drives on sale for $99. -- 40+yrs virtualization experience (since Jan68), online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
