PRIMECLUSTER Global Disk Services Configuration and Administration Guide 4.2 (Linux)

A.2.20 Ensuring Consistency of Snapshot Data

If snapshots are created while an application is accessing the volume, the snapshots may result from incomplete volume data and the data consistency may not be ensured.

To ensure the consistency of your snapshot data, you must stop the application that is accessing the volume in advance. After creating the snapshot, start the application again.

For example, if the volume (master) has been used as a file system such as GFS and ext3, before and after creating snapshots, unmount the system and remount it in order to ensure the snapshot data integrity.

To create a snapshot while running the application, the file system or database system you are using to manage the data must be able to ensure data integrity.

For an example, see "Online Backup and Instant Restore through Proxy Volume."