The technology is available on another IBM platform, Power7 with PowerVM Enterprise edition has a feature called Active Memory Deduplication. I have no idea how widespread the adoption and use of this feature is.
Active Memory™ Deduplication is a feature that is available on systems that have the PowerVM® Active Memory Sharing technology. PowerVM Active Memory Sharing is available with the PowerVM Enterprise Edition hardware feature. Active Memory Deduplication is a virtualization technology in which memory pages with identical contents are coalesced (or deduplicated) in physical memory. Active Memory Deduplication aggregates the same data in one memory position, and frees other duplicate memory blocks, thus optimizing memory use. A redpaper has more details for the curious: http://www.redbooks.ibm.com/redpieces/abstracts/redp4827.html Dana On Fri, 25 Jul 2014 05:49:03 -0500, Shane Ginnane <[email protected]> wrote: >On Fri, 25 Jul 2014 12:22:30 +0800, Timothy Sipples wrote: > >>I hate to disagree with Jim Mulder. :-) But I'm going to disagree with his >>absolute "No." Specifically and as an example, Java on z/OS does some >>interesting things with shared memory that, in my view, fit the question as >>stated. > >I'll have tuppence on Jim. >Dynamic memory de-dup ain't happening in this space - everyone does shared in >some form. >Linux has KSM but relies on the requestor to have the intelligence to indicate >that the memory requested is a candidate for merging. >Haven't seen too much indication devs have that amount of nous - in any >environment. > >Shane ... > >---------------------------------------------------------------------- >For IBM-MAIN subscribe / signoff / archive access instructions, >send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
