Yesterday I attended Julian Dyke’s session on Inside Rac and had the good fortune to be node 2 in a 4way node cluster. And Julian clearly demonstrated the importance of a good network in RAC, particularly for the internode interconnect.
Interesting was the Anti-Tuning RAC round-table with conclusion that more or less majority is running RAC because they have way too much money/time/hardware/name it.
It’s lunchtime and have attended three excellent sessions today. Jonathan Lewis’s Moving from RBO to CBO, James Morles Storage Internals for the Oracle Architect, and Joze Senegacnik’s Tuning with SQL Profiles. And although it was difficult to get up so early this morning, it was definitely worth it!
started the morning with Julian Dyke’s session on library cache. It was quite informative. I just attended both of Tanel Poder’s sessions and he had some very radical Oracle research techniques definite don’t do this at home material.
I can’t say a lot about presentations I went to as my head was completely empty after my 3 sessions. Last session was on Oracle Streams CDC – I am still not sure what the added value of CDC compare to regular Streams functionality. But the truth is I couldn’t think about anything else but Guinness at that point…
Two new features that really caught my eye were :the ability to apply application upgrades while the database is up and the connection pooling IN the database.
The client entrusted me with the migration of one of their mission critical apps running 8i on HPUX to — drum role please — 9i … on … IBM Mainframe running os390 (z/os). For this client, we were able to shave $600,000 (not just the Oracle license, but also the external costs of maintaining the environment) by migrating just one HPUX machine over to the mainframe with maybe 30 or more to go.
UKOUG 2006- I have three sessions there. These are first three right on Tuesday after the Opening Technical Keynote by Tom Kyte.
Over the last weekend I had the pleasure to do an 8i -> 10g, Solaris -> Linux migration. Talk about going in head–first. Now, whenever I run into a situation like this, we generally recommend a two–step process so that we can iron out bugs and be able to isolate causes. However, we were under serious time constraints, and we decided to just go with the following simple plan and move straight there.
While reviewing some material in advance of my presentation at UKOUG Conference 2006, I found an interesting change in RMAN behavior in Oracle 10g. The difference is in the way RMAN handles the case when an incremental level 1 backup is taken without an available level 0 backup. This probably won’t affect anyone much, but I found it interesting. And actually, there are scenarios in which it might cause issues.