Re: RAC in Informix by year end?

Data Cruncher wrote: > Taken from DBTA magazine. > > Did I read this correctly? Does it mean that by year end Informix > will offer RAC. > > ============================================= > HDR, RSS and SDS servers and even ER can be combined in any way to > provide a sophisticated and flexible high availability solution. If > the primary server fails and, for example, a HDR secondary is promoted > to be the new primary, the whole IDS MACH 11 cluster reconfigures > itself. RSS and SDS servers automatically connect to the new primary. > Informix also supports the encryption of all network communication > inside a MACH 11 database cluster. IBM is currently working on the > implemenation of the update functionality that allows SDS servers > write access to the data. This functionality can be expected to be > available by the end of the year. MACH 11 is an excellent alternative > to the well known complexity of Oracle RAC/DataGuard. Interesting technology but at least some of what I've read is nonsense. For example: "unlike RAC, MACH 11 does not require a high speed interconnect switch such as Infiniband" http://www.physorg.com/news98803681.html I can't think of a single RAC customer of mine using Infiniband and I can't think of a single member of the Oracle RAC Pack that has ever said Infiniband is required. The Infiniband story is mostly FUD. And the comment, above, is marketing-speak or ignorance or both. It will be interesting to see how the technology handles the situations that, in Oracle, stress the system such as multiple users accessing and changing the same data and index pages at the same time. -- Daniel A. Morgan University of Washington damorgan@x.washington.edu (replace x with u to respond) Puget Sound Oracle Users Group www.psoug.org