Jean Huot asked:

> Under MPEix 6.0 powerpath 2,
>
> 1) Is there any difference in performance between submitting 2 simultaneous
 > backups of 2 distinct sets of files on seperate drives (using a 4 way processor
 > system) versus doing a:
> store @[log in to unmask]@;;storeset=(*T1),(*T2)?

While the 1st commandment to answer performance questions is 'it depends',
I can see no fundamental difference with that, assuming that the disks
with the data are having the same speed, ditto for the tape devices.

>    I submit to jobs of backups so that I know which files are backed on which tape.
>
> 2) Does an online backup cover everything such that I can do a reload afterwards,
 > or do I have to back up certain files without having anyone on the system?

Assuming you ask about TurboStore, the question is do you use plain
';ONLINE'  or ';ONLINE=START|END' (aka TrueOnline) ?
TrueOnline will backup files that are open for write-access at the
sync point, the default ;ONLINE will tell you which files it could
not backup because they were open for write access.

> 3)  Does doing a Store @[log in to unmask]@  cover every possible file for a backup?

Yes, that is equivalent to STORE / .

If you use user volumesets, I recommend to also make sure all
the volumesets directories get stored, i.e. add
;DIRECTORY;ONVS=MPEXL_SYSTEM_VOLUME_SET, user_set1, user_set2, ...
to your backup options.

HTH,
Goetz

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