Vls Sizing Example 2 - HP StorageWorks 12000 - Virtual Library System EVA Gateway Manual

• 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 80 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
• Required Link - 400Mbit/sec link made available
• Typical replication time 12.8 hours
Now consider a larger backup requirement with a full database backup of 50 TB and an incre-
mental of 10% of 16.6 TB of file system data. Notice how as the amount of data backed up
scales the number of nodes scales, and as the number of nodes scales more processing power
is made available to both backup, deduplication, and replication. Here in this 2–node system
both nodes work to ensure the replication link is saturated at all times. In this example the Sizer
calculations show around 659 GB of data needs to replicate. There is a dedicated 400 Mbit/sec
link between sites. The calculations show that this replication can complete within 12.8 hours
(even allowing four hours for the first set of deduplication replication instructions to be generated,
so it is easy to achieve the requirement of backup and replication within 24 hours).
3. Sizing Scenario: 266 TB of database and file-system replication.
184 Virtual Library Systems