Hi,
I am looking into a volume-migration solution for AFS/DFS. The idea
is that volumes that are not accessed for a long time can be
automatically migrated to on-line library, to alleviate on-line disk
storage need to keep those dormant volumes (e.g., outdated tools, dead
projects, absent user volumes, ...). These volumes shall be migrated
back to disks automatically when they are referenced. Backup shall
also be done on migrated volumes.
I'd like to evaluate the merits of this approach, especially I need
to know how many volumes out there are not accessed. The
"vos examine" command gives the last update time but not the last
access time to account for reads. I tried the volinfo command on file
servers and it always gives a zero "accessDate". I guess it is not really
used. It also gives a "dayUseDate". Would it be an accurate reference
for the last access date???
It is also a concern that some file backup, garbage collection, or
virus checking programs might access these inactive volumes periodically,
and make them look accessed. So, any volume access time reading may not
be accurate in these environments.
Has this kind of measurement being done? How did you do it? What
did you find? Do you think space management based on volumes might be
useful to you?
Any comments?
Thanks,
Shyh-Wei Luan
