>I'm not sure I completely agree with that. AIX's PP facility is not >really like Solaris' use of physical partitions at all. > >Instead, PPs on AIX are a way to segment storage on a single disk so >that you can grow LVs when you need to and without dedicating storage >to them ahead of time.
I understand that bit; it's just that we never like to fragment our data that way. >Interestingly, you can safely grow it while the system is in use. >Back when I used AIX, I would frequently watch df output while >installing some big software package, and frantically type "sudo chfs >-a size=+1 /usr" when I saw that it was running low. That causes the >file system to grow, which forces the LV to grow underneath, and that >causes a new PP to be added. You can more or less safely grow ufs filesystems now too; I know that this was one of the drawbacks of Solaris over AIX; however, it always seemed silly to reserve space outside partitions, especially since having as few partitions as possible seems better from a maintenance standpoint. And not having the intermediate layer doesn't give you the additional fragmentation headache; that's a problem when assigned fixed bits of storage to the filesystem and when you do not allow the filesystem to know about the layering (not sure what AIX allows there). Casper _______________________________________________ opensolaris-discuss mailing list [email protected]
