>But our Z enthusiast > says we can put Redis and memcache on Z-Linux (under VM) without any > loss of functionality or performance (because we have extra capacity and > "paging on Z doesn't cost anything").
I'd agree on functionality, but performance is a harder question. Both redis and memcache build and run fine on Z, no problems there. The trick is that memory usage in a shared environment is much trickier to calculate the impact of mass allocations of RAM -- depends a lot on where and how fast you page, whether you have XSTOR or not, etc, etc, etc,. I'd try it with a smaller database and see how it goes. XSTORE will have a measurable impact, as will use of VDISK for paging. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
