Database Reference
In-Depth Information
Figure 2.4
Virtualization protections at every level.
“The Petabyte Challenge: 2011 IOUG Database Growth Survey” was produced by Unisphere Research, and
sponsored by Oracle. Figure provided courtesy of Unisphere Research, a Division of Information Today, Inc. and the
Independent Oracle Users Group (IOUG).
At the server level, you have options such as VMware High Availability (HA). With
VMware HA, if your server were to fail, all the affected virtual machines would be
restarted onto another available server with capacity. If an operating system failed
within a virtual machine, VMware HA would detect the failure and restart the VM.
VMware Fault Tolerance takes the level of protection up a notch. In the event of a
server failure, VMware Fault Tolerance provides transparent failover at a virtual
machine level with no disruption of service.
Moving all the way to the right side of
Figure 2.4
, you have VMware Site Recovery
Manager (SRM). This maps virtual machines to the appropriate resources on a failover
site. In the event of a site failure, all VMs would be restarted at the failover site.
With these tools as a DBA, you now have more options than ever before to improve the
availability of the database and are now able to take high availability to a new level.
Performance and Database Virtualization
How many times have you received a call from an irate user complaining about how
slow the database is performing? As DBAs, we know firsthand that this problem is most
