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Additional WAN Assists in Asynchronous Replication with StorTrends®
In addition to the optimizations described above, StorTrends® supports the compression and
encryption of data before it is released on the WAN, which reduces the net size of data transferred
over these more expensive links. StorTrends® supports various compression depths, including an
adaptive compression mode where the depth of compression is determined by an analysis of the
current and statistical load on the system.
Figure 4: ManageTrends® Replication Management Screen Summary
In summary, StorTrends utilizes several sophisticated technologies and techniques to optimize the
speed of long distance WAN connections, including:
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Frontline I/Os optimized for SAN
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Replication I/Os optimized for WAN
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One-to-One, One-to-many, Many-to-one, Round-Robin replication schemas
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Link-level I/O throttling
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Multiple levels of compression, including adaptive compression
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Encryption
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Delta transfers and data deduplication
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Automatic validation of replicated snapshots
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Extensive instrumentation and monitoring
Appendix J : WDS and Deduplication in StorTrends iTX 309
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