Does anybody have some experience in JFS2 snapshots???

[sbix]

Pls help!
I need some good info about the new feature of JFS2 (AIX 5L).
The Difference Guide redbook isn't very exhaustive ... so ... I need some help, especially in what you can really do with them.
Are they comparable to Oracle Backup OnLine, or they are only a fully consistent image of a filesystem in a specific moment (bu only in THAT moment)?

 

[DSMARWAY]

Hi,

sbix , we wre alos looking at jfs2 snapshot backup , haven't yet tried it but , snapshots the filesystem at a point in time , this is not the same as oracle warm backup becuase with oracle you have to put tablespaces in backup mode first , back them up then backup control file ,
theis is probably useful for flat file dbases or user filesystems

http://publib16.boulder.ibm.com/pseries/en_US/aixbman/baseadmn/HT_baseadmn_snapshotfs.htm

 

[sbix]

tnx DSAR,
I have already seen the man page you posted and it was ALMOST clear.
The problem is:
in the AIX 5L difference guide redbook they say: "snapshot continue to keep stable even if the snappedFS continue to change" ... what the heck does it mean? Is it like an Oracle snapshot which basically is a view on some tables of a remote system which COULD BE UPDATED online for each update executed on the remote system for those tables?
Is only like a photo in a specific instant fully in which each file in the filesystem is fully consistent with the others?
Furthermore ... the manual says "once a filesystem HAVING snapshots is mounted all the snapshot are started" ... what does it means? Snapshots are refreshed each time a snappedFS with living snapshots is mounted?
.... Uhm ... better to make some test