EMC Backup and Recovery for Oracle 11g OLTP Enabled by EMC ...

Chapter 3: Storage Design
CLARiiON storage design and configuration
Design CLARiiON CX4-960 uses UltraFlex technology to provide array connectivity. This
approach is extremely flexible and allows each CX4 to be tailored to each user’s
specific needs.
In the CX4 deployed for this use case, each storage processor was populated with
four back-end buses to provide 4 Gb connectivity to the DAEs and disk drives. Each
storage processor had eight 4 Gb front-end Fibre Channel ports for SAN
connectivity. There were also two iSCSI ports on each storage processor that were
not used.
Nine DAEs were populated with 130 x 300 GB 15k drives, and five 146 GB drives
were also used for the vault. The CLARiiON was configured to house a 1 TB
production database and two clone copies of that database. The clone copies were
utilized as follows:
• Gold copy
• Backup copy
Gold copy
At various logical checkpoints within the testing process the gold copy was refreshed
to ensure there was an up-to-date copy of the database available at all times. This
ensured that an instantaneous recovery image was always available in the event that
any logical corruption occurred during, or as result of, the testing process. If any
issue did occur, a reverse synchronization from the SnapView clone gold copy would
have made the data available immediately, thereby avoiding having to rebuild the
database.
Backup copy
The backup clone copy was used for NetWorker proxy backups. The clone copy of
the database was mounted to the proxy node and the backups were executed on the
proxy node. This is also referred to as the “clone mount host.”
Configuration It is a best practice to use ASM external redundancy for data protection when using
EMC arrays. CLARiiON will also provide protection against loss of media, as well as
transparent failover in the event of a specific disk or component failure.
The following image shows the CLARiiON layout; the CX4-960 deployed for this
solution had four 4 Gb Fibre Channel back-end buses for disk connectivity. The
back-end buses are numbered Bus 0 to Bus 3. Each bus was connected to a
number of DAEs (disk array enclosures). DAEs are numbered using the “Bus X Enc
Y” nomenclature, so the first enclosure on Bus 0 is therefore known as Bus 0 Enc 0.
Each bus had connectivity to both storage processors for failover purposes.
Each enclosure can hold up to 15 disk drives. Each disk drive is numbered in an
extension of the Bus Enclosure scheme. The first disk in Bus 0 Enclosure 0 is known
as disk 0_0_0.
EMC Backup and Recovery for Oracle 11g OLTP Enabled by EMC CLARiiON, EMC Data Domain, EMC NetWorker,
and Oracle Recovery Manager using NFS Proven Solution Guide
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