HP 12000 HP VLS Solutions Guide Design Guidelines for Virtual Library Systems - Page 117
VLS Sizing Example 1, File System Full backup Size 5TB - Typical incremental size of 10
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Figure 52 VLS Sizing Example 1 • Database Full Backup size 15TB - 1% change rate • File System Full backup Size 5TB - Typical incremental size of 10% • Replication Window 24 Hours • Required Link speed 40% of existing 200Mbit/sec link This example shows a 15 TB full database backup and 10% incremental backup of file system data to replicate daily between sites. There is already a 200Mbit/sec link between sites. The actual amount of data to replicate is 164 GB (representing 15 TB full database backup and 10% incremental of 5 TB File system backup). Using bandwidth throttling at a rate of 40% of the 200Mbit/sec link, you can easily accomplish the backup and replication within 24 hours without impacting application performance using the same WAN link. 2. Sizing Scenario: 66 TB of database and file-system replication. Figure 53 VLS Sizing Example 2 • Database Full Backup size 50TB - 1% change rate • File System Full backup Size 16.6 TB - This example replicates one of the incremental backups, size of 10% • Replication Window 24 hours Design Considerations 117