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Re: [linux-lvm] LVM in stock kernel!?





PROS - LVM is almost a necessity when managing large amounts of storage.

although at some cost in performance since there's an additional layer of translation before you get to the actual disk blocks....

- Many unix people think that storage layout is one of the most difficult
aspects of maintaining a system. LVM simply makes storage management much
more flexible by allowing storage to be reallocated easily at anytime.

at some cost again....insulation from actual details of storage does mean you are not necessarily making the optimal use of layout....but the benefits seem to far outweigh these costs.

- Folks coming to Linux from other UNIXes which use an LVM (HP, AIX etc..)
will be familiar and comfortable with LVM concepts and will more readily
embrace the penguin.

add at least Solaris (Solstice Disk Suite) and SGI IRIX (xlv - a very nice combination with the xfs filesystem) to this list.

- The "out of storage space" is a very common problem for users especially
new users. LVM makes resizing allocated space easier. This is perhaps the
most common problem I here about from new users.
- LVM is not a new concept and has been proven to be indispensible in
other OSes, (ie. It is not just some hair-brained scheme that just makes
things harder to learn and more complicated).

CONS
- Using LVM is by definition adding a another logical layer for storage.
Users not already familiar with an LVM will have to do some learning, or
not use LVM.

Not terribly familiar with Linux LVM (listening here to help become so)...other LVMs require a large number of commands to become familar with (the AIX LVM being the prototype which _most_ folks have followed; Solaris takes a somewhat different approach). Actually, a well-thought out GUI can be a great help here. The author of a course I teach has constructed one as a sample which gives you drag-and-drop LVM management - in very little tk/perl code.



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