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Showing posts from April, 2011

Manual archiving of redo logs gone with 9i – or is it not?

Originally published on Dbvisit blog at http://blog.dbvisit.com/manual-archiving-of-redo-logs-gone-with-9i-or-is-it-not/.

If you memory dates back to the pre-10g times, you will maybe recall the steps to enable archivelog mode on the database at that time. Perhaps the greatest catch was that the online logs did not get archived automatically by default – you had to do it manually.

Or, let Oracle come to rescue, and let the ARCH process(es) do it for you by starting them with log_archive_start = true (or even dynamically with alter system archive log start/stop). You could even start ARCH in noarchivelog mode, so they did completely nothing, just writing error messages to alert.log.

One of the new features of 10g was getting rid of all of this – ARCH starting is governed solely by (no)archivelog mode and the DBA does not need to fiddle with anything else to get it right. Great applause, many thanks, scene over.

Well, all above is just a short transcript of my memory of those great time…

Installing RAC on Oracle VM

Originally published on Dbvisit blog at http://blog.dbvisit.com/installing-rac-on-oracle-vm/.

One of the nice features of Oracle VM (and perhaps the most compelling one when you are evaluating different virtualization products for testing and development) is the comprehensive list of prepackaged templates available at Oracle e-delivery.

The list is not complete and probably cannot ever be, as Oracle is expanding it’s product offerings very fast. Of the missing basic configurations, there is for example no Oracle Database on Solaris template (although plain Solaris is available).

However, let’s look at the RAC templates. The list is comprehensive and you can choose between 11.1 and 11.2 on Oracle Enterprise Linux, both 32- and 64-bit.

The first-time setup is quite easy and easy if you follow supplied pdf documentation. The usual setup is 2-node RAC, but you can semi-manually add further nodes as well.

Still, there is a catch: the pdf declares that one of the prerequisities is to have