Shared-everything is even more tightly-coupled than RAC - shared-everything is communal memory bus, shared I/O channel, etc - many people list SMP as a shared-everything cluster, though something like a NUMA cluster is more appropriate. RAC would be defined as a "Shared-something" cluster - there is shared data access and some application-level memory sharing. The definition gets even fuzzier when you get into RDMA-based architectures like InfiniBand, where nodes are actually granting direct memory access to other nodes within a cluster. Soon enough, there will be "shared kinda-something-but-I-don't-really-like-them-that-way". DB2 is a shared-nothing cluster, though.
Thanks, Matt -- Matthew Zito GridApp Systems Email: [EMAIL PROTECTED] Cell: 646-220-3551 Phone: 212-358-8211 x 359 http://www.gridapp.com > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of [EMAIL PROTECTED] > Sent: Wednesday, December 03, 2003 12:24 PM > To: Multiple recipients of list ORACLE-L > Subject: what is the difference between shared nothing and > shared everything? > > > this has to do with RAC right? oracle uses shared everything > and ibm uses shared nothing right? > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: <[EMAIL PROTECTED] > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') > and in the message BODY, include a line containing: UNSUB > ORACLE-L (or the name of mailing list you want to be removed > from). You may also send the HELP command for other > information (like subscribing). > -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Matthew Zito INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
