Sun StorEdge[TM] Availability Suite: Remote Mirror: Best Practice for Performing Full Mirror Sync Over a Highly Latent Network
Last updated on JUNE 12, 2017
Applies to:Sun Storage Availability Suite - Version: 3.0
Sun Storage Network Data Replicator (SNDR) - Version: 3.0.1 and later [Release: 3.0 and later]
Availability Suite Remote Mirror Software(aka SNDR). The guide states that
under circumstances where network latency causes the full sync time
for a set or group of sets to be unmanageably large, to perform a backup
to tape of the Primary device and ship it to the secondary site for a restore.
The document is broken into two parts. The first part details this procedure through the use of the Point In Time Copy (aka Instant Image) software. The second part details the procedure without PiTC. Oracle recommends that the first procedure be used on systems that are in production, as it is the most reliable way to ensure data consistency. This document provides more details, ensuring that data integrity is maintained. The document uses magnetic tape as an example of removable media. This is not a media limitation. If you have other media that may be accessed through a raw utility for reads and writes, and meets the physical size requirements, it may be used instead of magnetic tape.
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