When building a system backup and recovery solutions, it require two major tasks:

• Reduction “backup windows (time stop applications – zero downtime);

• Reducing traffic data backup and cost of computing resources.

In the first task while shutting down the application can be minimized by using special techniques, such as the creation of snapshots, the idle time is calculated in seconds. A “snapshot” of the state and recording the location data. With this information, the data can be restored in case of loss or damage.

To solve the second problem, you can switch the architecture by using SAN, then backup and data recovery can be arranged without the use of resources, local area network (off-grid backup), as well as dedicated servers (server-free backup). Thanks to this centralized data backup scheme which reduces the number of devices (tape drives, etc.) involved in this process.

• For off-grid backup data from disk arrays shipped within SAN, Tape, connected directly to the storage network.

When we are copying data, it is moved from storage devices to tape without the direct involvement of servers – exchange data directly between storage devices inside SAN block-level data, but if necessary, may per-file revision recovery.

Read More : Data Storage Systems (Part I)
Read More : Data Storage Systems (Part II)
Read More : Data Storage Systems (Part III)