So do we, 2 CFs per Sysplex (you "cannot" run a production site with only 1).
I am a little confused about your questions: System managed rebuild is standard and always active. This will rebuild structures in another CF in case of problems. It is transparent to the application, be it with some delays in structure availability during the rebuild. Structure duplexing comes in 2 flavors: user-managed and system-managed. User-managed is done by the application, if it supports it, e.g. DB2. If not, you can use system-managed structure duplexing. This comes with some cost of inter-CF communication. We do not use it, because we don't have structures that require 101% availability. Thin interrupts are an enhancement that only provides improvement and exists for several CPU generations, so it should be beyond doubt. Kees. > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On > Behalf Of Mike Schwab > Sent: 18 December, 2018 19:23 > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: CFCC Performance > > We had 4 CFs. Two for the TestPlex and two for the Production Plex. > > On Tue, Dec 18, 2018 at 10:37 AM Allan Staller <allan.stal...@hcl.com> > wrote: > > > > I am in the process or reconfiguring from a Single CF to multiple CFs > (per partition) to eliminate the single point of failure. > > The subject of CFCC Thin Interrupts has been evaluated and will most > likely be implemented. > > > > As part of this process the discussion of DUPLEX CF structure vs. use > of SYSTEM MANAGED Rebuild has also come up. > > > > I have heard the use of duplexing has been deprecated in favor of > system managed rebuild for performance reasons. > > CFCC Thin Interrupts might offset some of the (alleged) performance > penalty. > > > > Can anyone point me to any documentation or contacts on the subject? > > Searches if IBM Techdocs, Redbooks, ResourceLink, etc. have produced > very limited information. Most of which seem to be leaning in the SYSTEM > MANAGED Rebuild direction. > > > > Thanks in advance, > > ::DISCLAIMER:: > > ---------------------------------------------------------------------- > ------------------------------------------------------------------------ > ------------------------------------------------------------------------ > ---------------------------------------------------------------- > > The contents of this e-mail and any attachment(s) are confidential and > intended for the named recipient(s) only. E-mail transmission is not > guaranteed to be secure or error-free as information could be > intercepted, corrupted, lost, destroyed, arrive late or incomplete, or > may contain viruses in transmission. The e mail and its contents (with > or without referred errors) shall therefore not attach any liability on > the originator or HCL or its affiliates. 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