HP StorageWorks 6000 HP StorageWorks VLS and D2D Solutions Guide (AG306-96028, - Page 186
DB:1 FS &, VLS Sizing Example 4
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Data types (3 DB:1 FS) & backup type Full size in GB Replicated data (compressed) in GB Database (Full) 1% change 50000 660 File Data (incremental 10%)* 16666 99 Database (Full) 1% change 200000 2640 File Data (incremental 10%)* 66666 3960 * Fulls on the weekend. Time available to replication/time to replicate Link speed available or required in Mbit/sec Combined link speed 9.5 hours 3.3 hours Assume fixed dedicated link speed of 400 Mbit/sec Assume fixed dedicated link speed of 400 Mbit/sec 24 hours 444 at 100% 666 at 100% At greater than 1 Gb/sec+ at high volumes add extra link bandwidth for catch-up 4. Sizing Scenario: Many-to-one (4:1) replication. Figure 82 VLS Sizing Example 4 . Here are four remote sites replicating 2 TB and 10 TB backups daily into a central VLS9000. The best approach in a many-to-one scenario is: • Size each of the individual links separately. • Ensure the links at the target at least match the total remote size replication capacity (in this example 300 Mbits/sec). • If possible, allow 25% extra capacity for "catch up" in the event of a backlog or paused replications should a link go down. 186 Virtual Library Systems