With Data Guard, you have the choice between Physical and Logical Standby databases. Let’s see the differences! My demo starts with a Physical Standby, that is then converted into a Logical Standby (therefore the name of the database):
Automatic Storage Management (ASM) is becoming the standard for good reasons. Still, the way it mirrors remains a mystery for many customers I encounter, so I decided to cover it briefly here.
It means that every stripe is mirrored once. There is a primary on one disk and a mirror on another disk. All stripes are spread across all disks. High redundancy would mean that every primary stripe has two mirrors, each on another disk. Obviously, the mirroring reduces the usable capacity: It’s one half of the raw capacity for normal redundancy and one third for high redundancy. The normal redundancy as on the picture safeguards against the loss of any one disk.
I’m in the Leadership Circle again :-) That is a quarterly Corporate Award for the best instructors worldwide according to customer feedback.
Oracle University has generally high quality standards, so it is hard to stand out individually. The more I am proud to be listed together with these great colleagues:
2014 brought a new high water mark with 282,000 hits!
Meanwhile, uhesse.com gets over 1,000 hits per day on average.
The vast majority of visitors came to uhesse.com via google searches: 163,000
On a distant second place is Twitter: 2,500 visitors came from there
Facebook and LinkedIn each lead 800 visitors to uhesse.com
400 visitors came from jonathanlewis.wordpress.com – thank you, Jonathan!
These I consider the most important points about Exadata Patching:
MOS Note 888828.1 is your first read whenever you think about Exadata Patching
Expect quarterly bundle patches for the storage servers and the compute nodes. The other components (Infiniband switches, Cisco Ethernet Switch, PDUs) are less frequently patched and not on the picture therefore.
The Oracle circus went to Liverpool this year for the annual conference of the UK Oracle User Group and it was a fantastic event there! Top speakers and a very knowledgeable audience too, I was really impressed by the quality we have experienced. Together with my friends and colleagues Iloon and Joel, I was waving the flag for Oracle University again – and it was really fun to do so :-)
Just wanted to share some pieces of information from the recent DOAG annual conference that you may find interesting.
From Mike Dietrich’s presentation about Database Upgrade:
From Carsten Czarski’s talk about XML DB:
When you look into V$RECOVERY_AREA_USAGE, you see a strange row at the bottom:
As every year, there’s a long list of great speakers with interesting talks to attend at the DOAG (German Oracle User Group) annual conference. Sadly I cannot attend them all, so I’ve got to make a choice:
Datenbank-Upgrade nach Oracle 188.8.131.52 – Aufwand, Vorgehen, Kunden by Mike Dietrich, Oracle
Die unheimliche Begegnung der dritten Art: XML DB für den DBA by Carsten Czarski, Oracle
Advanced RAC Programming Features by Martin Bach, Enkitec
Automatische Daten Optimierung, Heatmap und Compression 12c live by Ulrike Schwinn, Oracle
Understanding Oracle RAC Internals The Cache Fusion Edition by Markus Michalewicz, Oracle