Important ASM changes in 11g release 2

There are some super-important changes to storage management in Oracle 11g release 2,  Oracle ACE Lutz Hartmann has offered these excerpts from his new book "Oracle 11g New Features" that delve into these important new enhancements in 11gr2.

ASM Cluster Filesystem (ACFS) - This new feature allows is also named "Unified Storage Management" (UFS) and allows for storing Application File Data , the Oracle Cluster Registry (OCR), the Cluster Voting Disk, and the Oracle Binaries, all within ASM

http://www.dba-oracle.com/oracle11g/t_asmfs_cluster_filesystem_rac.htm

Cluster Voting Disk and Cluster Registry in ASM  - This is an important RAC enhancement where it is now possible to create Quorum Disk Groups and Quorum Disk FailGroups which cannot hold any other data than OCR or Voting Disk data.

http://www.dba-oracle.com/oracle11g/t_cluster_voting_disk_registry.htm

ASM Dynamic Volume Manager (ADVM) - ADVM is a new device driver which is integrated into the Oracle Kernel and functions as a standard I/O interface for normal file systems to utilize ASM functionalities.   This driver communicates with the ASM instance about ASM extent maps, rebalancing operations and I/O failure issues.

http://www.dba-oracle.com/oracle11g/t_asm_dynamic_volume_manager.htm

ASM FS Snapshots in 11gR2 - It is now possible to create up to 63 image copies of file systems as a point in time capture. These snapshots a read only and can be used to view a file system as of the point in time in the past when they were created.

http://www.dba-oracle.com/oracle11g/t_asm_cluster_filesystem_snapshots.htm

ASM Optimal Disk Placement in 11gR2 - It is now possible to specify on which disk regions the ASM Disks will be placed. This enables us to make use of faster disk zones on the outer regions of disks for better I/O performance.

http://www.dba-oracle.com/oracle11g/asm_optimal_disk_placement.htm

 

*****************************************

Need a Health Check?

Oracle is the worlds most complex and robust database and there are hundreds of sub-optimal setting that can cripple your database performance.

Burleson Consulting has a great Oracle health check where we identify all database bottlenecks to ensure that your mission-critical system is running at optimal speeds.

Just call 800-766-1884 to schedule your health check.

*****************************************

Need Oracle Training?

The very best Oracle training comes from Burleson Consulting, where you get an on-site visit by an experienced Oracle expert and author.  Whether it's one-on-one mentoring or getting a customized on-site Oracle training class, there is no substitute for BC Oracle training.  Just call 800-766-1884 for details, and check-out our on-site Oracle training catalog at the following link:

http://www.dba-oracle.com/bc-catalog.pdf