VERITAS FlashSnap Point-In-Time-Copy Solutions Administrator's Guide

Chapter 3, Online Database Backup

Making an Off-Host Backup of an Online Database

For example, to wait for synchronization to finish for all the snapshots svol1, svol2 and

svol3, you would issue three separate commands:

# vxsnap -g dbasedg syncwait svol1

# vxsnap -g dbasedg syncwait svol2

# vxsnap -g dbasedg syncwait svol3

Note You cannot move a snapshot volume into a different disk group until synchronization of

its contents is complete. You can use the vxsnap print command to check on the

progress of synchronization.

6. On the primary host, use the following command to split the disks containing the snapshot

volumes into a separate disk group, snapvoldg, from the original disk group, volumedg:

# vxdg split volumedg snapvoldg snapvol ...

7. On the primary host, deport the snapshot volume’s disk group using the following command:

# vxdg deport snapvoldg

8. On the OHP host where the backup is to be performed, use the following command to import

the snapshot volume’s disk group:

# vxdg import snapvoldg

9. The snapshot volumes are initially disabled following the split. Use the following commands

on the OHP host to recover and restart the snapshot volumes:

# vxrecover -g snapvoldg -m snapvol ...

# vxvol -g snapvoldg start snapvol ...

10. On the OHP host, back up the snapshot volumes. If you need to remount the file system in the

volume to back it up, first run fsck on the volumes. The following are sample commands for

checking and mounting a file system:

# fsck -F vxfs /dev/vx/rdsk/snapvoldg/snapvol

# mount -F vxfs /dev/vx/dsk/snapvoldg/snapvol mount_point

Note On Linux, use the -t option, and on AIX, use the -V option, instead of the -F option

for both commands.

Back up the file system at this point using a command such as bpbackup in VERITAS

NetBackup. After the backup is complete, use the following command to unmount the file

system.

# unmount mount_point