Hemant, I would guess that this is true if you are caching values for the sequence. Each database instance might cache the same set of values.
Turn sequence caching off, and I would think that the problem goes away. Havn't tried this in awhile, but it makes sense. Tom Mercadante Oracle Certified Professional -----Original Message----- Sent: Monday, November 03, 2003 10:39 AM To: Multiple recipients of list ORACLE-L I have always been comfortable with the idea that Sequences continue to guarantee uniqueness even in OPS / RAC environments. However, a recent Builder.Com article by Scott Stephens on the SYS_GUID function has these lines : "Sequence generator numbers are guaranteed to be unique only for a single instance, which is unsuitable for use as a primary key in parallel or remote environments, where a sequence in each environment might generate the same number and result in conflicts. An identifier created by SYS_GUID is guaranteed to be unique for each database." Huh ?! Do the lines mean that a single sequence can have duplicate values in the two instances of an RAC cluster ? Hemant K Chitale Oracle 9i Database Administrator Certified Professional My personal web site is : http://hkchital.tripod.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Hemant K Chitale 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: Mercadante, Thomas F 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).
