QSAN: Widening The Dimension Of Data Storage System !

Initiated almost thirteen years back in 2004 QSAN data storage system has emerged as one of the robust solution to data storage issues for the organization that have to manage the data base of huge segment. The worth mentioning feature of data storage system offered by QSAN is that it is user friendly and offer complete security to the data with full reliability.

Functioning of QSAN Storage system

Where the other storage system requires you to access the whole data for accessing any data. QSAN offers fastest, authentic and easy way to access any data with help of its snapshot functionality.

Creating the snapshot of specific data

Whenever any user intends to modify the data set from the host the data will move through the file system and also from memory of host data. The host data will later on transit the data from memory to physical disks despite of their location, depending upon the device in which it is stored. Here it is also possible that some of the data might not move into the disk from the memory. In this situation the snapshot might not be able to provide the clear image of the required data. To avoid any such problem the user should completely flush the data from memory to disk before capturing the snapshot.

The groups working on LINUX and UNIX platform can make use of sync command for flushing the data from operating system into disk. For windows, the Microsoft offers a tool named as sync, which performs the same functions as performed by sync command in LINUX and UNIX. Moving ahead the Microsoft has also developed the VSS facility (Volume Shadow Copy Service) for controlling the issue. In simple words VSS may be defined as the technique of developing a point in time copies of data set referred as shadow copies.

How QSAN Snapshot works

The QSAN snap works on copy-on-writer technique over UDV/VD and delivers instant and efficient backup procedure. While capturing snapshot, it do not copies at any data in the beginning until the request of data modification is not received by it. On receiving the data copying request it copies the data at the space determined for snapshot and overwrites the data with modifications.