OSCP Remote Mirroring test

About the OSCP Remote Mirroring test

The OSCP Remote Mirroring test is for using the Remote Mirroring function of storage devices as a disaster recovery measure of Oracle databases when replicating and restoring databases at a remote location.

The Remote Mirroring function replicates or saves data in one storage device to a different and remote storage device at a remote location at the specified time, or uses such replicated data. The creation and retention of replications is executed by the function of the storage unit, and will not impose any loads on server machines that operate databases.

By using this Remote Mirroring function in combination with the Standby Database mechanism of an Oracle database, it is possible to execute data restoration without any data loss at the time of disaster, which would be difficult if using the Standby Database function only.

Standby Database and Remote Mirroring

An Oracle database has the Standby Database mechanism that replicates databases at remote locations. It transfers archive log files generated during the course of operations to remote locations through communications functions such as TCP/IP, and applies those files to already-replicated databases to be updated. There is, however, some time lag in actual transaction processing before archive log files are transferred to remote locations. Transactions made during this period are recorded in the Online Redo Log on a real-time basis, but data existing only in the Online Redo Log may be lost at the time of disaster, depending on the status of the log.

Remote Data Replication

In NEC Storage, the Remote Mirroring function is realized by the RemoteDataReplication function. The data replication function composed of an NEC Storage disk array device and its related software products can replicate database operation volumes in a different NEC Storage disk array device of the same type installed in a remote location.

The two disk array devices can be connected by various types of fast-speed lines such as fiber channels that can provide up to 2 Gbps transfer rate, and this will allow high-speed data replication at a remote location without lowering operational performance.

Furthermore, since the RemoteDataReplication function has the same operability as the DynamicDataReplication function of the NEC Storage disk array device, even though the DynamicDataReplication function is already installed for backup purposes, it is possible to use the RemoteDataReplication function in an integrated operational style.

The S4000 series and the S3000 series have both DynamicDataReplication and RemoteDataReplication, and the S2000 series has only DynamicDataReplication (specifications are subject to change without prior notice).

The OSCP tests

NEC obtained the OSCP Remote Mirroring test kit from Oracle to test compatibility of the NEC Storage Remote Mirroring - the RemoteDataReplication - function with Oracle databases. NEC as a result passed all the Remote Mirroring-related tests that Oracle had as the OSCP compatibility conditions.

Tests were conducted in the following conditions. NEC plans to sequentially conduct tests on application of the function to various types of platform.

White Paper

Details of the results of the OSCP Remote Mirroring category test using NEC Storage disk array devices are disclosed as the following White Paper:

NEC Storage Series Disk Array Guide for Oracle Storage Compatibility Program Remote Mirroring Technologies

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