Sao lưu dữ liệu
Keep your data highly available
Data loss happens in all kinds of situations such as hard drive failures, virus attacks, file system crashes, unexpected power outage, and even natural disasters. QSAN provides array-based Storage Disaster Recovery Solution that includes writeable snapshots with VSS support, volume cloning, and remote replication. The storage planning varies with the main purpose of the data volumes. When a data volume is simply a backup for temporary data, a quick snapshot setup would be enough. But if a data volume contains important data such as contract records, purchase orders, or itself is a online database storage and cannot accept any downtime, the data volume’s recovery plan should include multiple, local, and remote site backups. The local backup can minimize the recovery time and the remote site backup is perfect for immediate replacement for the original data volume. The remote site backup also gives IT administrators more time to figure out and resolve the issues of the original data volume. When a natural disaster happens, the recovery may take longer than expected which may involve rebuilding new data center.
QSAN Backup and Disaster Recovery Solution contains built-in writeable snapshot with VSS support, volume cloning, and remote replication. QSAN remote replication is well programmed with multiple features activating in the same time. It supports up to 32 data volumes per system for replicating. Each data volume can be setup manually or with schedule. The transmitting throughput is guaranteed with dedicated port support per RAID controller and protected with failover mechanism. Each source storage system can be a destination storage system to backup other storage systems in the same time. This feature is designed to fit any storage planning and circumstances. And when the private line has some problems or the traffic is jammed, the schedule tasks retry and restart in well-defined topology all the time. When there is a large amount of data to be replicating, the task is able to automatically start the transmitting when reaching the anteriorly configured threshold value. The automatic synchronization mechanism can avoid too many data waiting to be replicated, and reduce the chance that the private line bandwidth may not be able to digest the amount of data in time before next task starts.
Consider a company having several branches or datacenters over separated locations. The data safety can be increased by those branches have data volume backup remotely. The following figure illustrates a typical branch office model and the storage systems in the headquarters and branches have data volumes with backup remotely in other office.
|Archiving; Data pool.||RAID 52 volume + Snapshot|
|Employee data backup; Branch data pool.||RAID 52 volume + Snapshot|
|Email server; Exchange; Surveillance data; Database.||RAID 6 volume + Snapshot + Volume cloning + (Remote replication)|
|Online nonstop service; Confidential data; Tax data.||RAID 6 volume + Snapshot + (Volume cloning) + Remote replication|