Exadata, how to backup domU

Backup user domaine machine (domU) is quite easy in Exadata system.

1. Pause the DomU

[root@db01-m ~]# xm list
Name                                        ID   Mem VCPUs      State   Time(s)
Domain-0                                     0  8571     4     r----- 15546936.0
vm01db01.mydomaine.local             48 180227    22        -b----  56705.8
...

root@db01-m ~]# xm pause vm01db01.mydomaine.local 


[root@db01-m ~]# xm list
Name                                 ID   Mem VCPUs  State   Time(s)
Domain-0                                0  8571     4  ----- 15475175.2
vm01db01.mydomaine.local        48 180227       22  --p--- 29.7          <==== in pause status

2. reflink orig_file snap_file

[root@db01-m ~]# mkdir -p /EXAVMIMAGES/Backup
[root@db01-m ~]# find /EXAVMIMAGES/GuestImages/vm01db01.mydomaine.local -type f -exec reflink {} /EXAVMIMAGES/Backup{} \;

3.Unpausing the DomU

root@db01-m ~]# xm unpause vm01db01.mydomaine.local 

4. Create a backup of the snapshots

[root@db01-m ~]# tar -cvzpf vm01db01.tar.gz /EXAVMIMAGES/Backup/vm01db01

5. remove reflinks

[root@db01-m ~]# rm –rf /EXAVMIMAGES/Backup/*