HP StorageWorks 6000 HP StorageWorks VLS and D2D Solutions Guide (AG306-96028, - Page 88
Many-to-One Example using Mixed WAN Link Speeds
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Figure 36 Many-to-One Example using Mixed WAN Link Speeds . Here are four remote sites replicating 100 GB and 500 GB backups daily into a central D2D4000. Note also that the central D2D4000 has 2 x 1 GbE connections from the central router for link aggregation. Follow these guidelines for the best approach to a many-to-one scenario: • Size each of the individual links separately. • If possible use the "blackout window" settings to stagger the replications throughout the day to ensure there are not greater than eight replications active at any one time. • Be careful with bandwidth limiting values. There is a minimum of 512 KB/sec and the throttling value selected should not cause impaired application response times. • If possible, provision some extra bandwidth above what is required for daily replication to allow for "catch-up" mode if replications are paused/stopped due to a link failure. • Wherever possible do a proof of concept before implementing into production. 88 D2D Systems