Posts Tagged ‘RAC’
Verification of CRS Integrity Was Unsuccessful
While going through the routine checks from Grid Control, I found a critical alert stating “clusterware integrity check failed” and by clicking on this message it says that there is problem with some metric collections on RAC environment. To check the node [Read More]
10g RAC – Single Node Install Error
Last week we were trying to setup a 2 Node 10g RAC System on Linux with openfiler used for shared storage. We were using the article written by Jeffery Hunter. This was not the first time I was doing it, but by mistake we chose the machine with 500Mb memory to be used for [Read More]
Raw Devices to be deprecated in 12G
I was browsing through the OraNA.info posts and found an interesting post from Steve Karam which referred to a metalink Note:578455.1 – Announcement of De-Support of RAW devices in Release 12G If you go through the note, it mentions desupport of Raw devices from [Read More]
Enabling Flashback On RAC Database
Enabling Flashback /Archive Log mode on a Single Instance Database is quite straight forward. In case of RAC, you need to follow additional steps. The requirements for enabling Flashback Database are: Your database must be running in ARCHIVELOG mode, because archived logs [Read More]
DBConsole Issue on RAC -Part II
Continuing with DBConsole issue, we were able to get the cluvfy return success for the nodes. Basically Oracle suggested us that when we use ssh we should not get any banner. E.g $ ssh PROD02 date Fri Jun 13 02:00:41 IST 2008 But in our case it was displaying a banner which [Read More]
DBConsole Issue on RAC -Part I
Currently I am working on issue where DBConsole is not starting on our 2 Node RAC system. When I try to start, I get following errors $ emctl status dbconsole TZ set to US/Pacific Exception in getting local host java.net.UnknownHostException: PROD01: PROD01 at [Read More]
Adding new ASM disk to RAC database fails
Many times i came across a common problem in RAC databases where trying to add an asm disk is not possible due to errors like ORA-15075 “disk(s) are not visible cluster-wide” ORA-15020 “discovered duplicate ASM disk “DISK1″ and ORA-15054 [Read More]
Transparent Application Failover – TAF
Transparent Application Failover (TAF) is a client-side feature that allows for clients to reconnect to surviving databases in the event of a failure of a database instance. Note that this is not used for purpose of load balancing or for Connect Time Failover. TAF [Read More]
CRSCTL CheatSheet
You can find below various commands which can be used to administer Oracle Clusterware using crsctl. This is for purpose of easy reference. Start Oracle Clusterware #crsctl start crs Stop Oracle Clusterware #crsctl stop crs Enable Oracle Clusterware #crsctl enable crs It [Read More]
11G: OCR Manual Backups
OCR is a file that manages cluster and Oracle Real Application Clusters (Oracle RAC) database configuration information. The OCR contains information about the cluster node list, instance-to-node mapping information, and information about Oracle Clusterware resource [Read More]
