On 05/14/2015 10:24 PM, Carlos E. R. wrote:
Administering LVM is another level of difficulty, specially when there
are problems. I would not use it unless you are familiar enough with
it. I am not.
Problems?
I suppose you can have problems with fdisk as well, but I find
administering LVM about as complicated as administering with fdisk.
The nice thing about LVM is that if you make a mistake you can easily
correct it. No so easy with fdisk.
Suse used to have a nice document on administering LVM. I still have a
print out on a shelf. I dug it out.
its by Michael Hasenstein
and is dates (c) 2001
"SuSE has included the Logical Volume Manager since SuSE Linux 6.3."
http://blyx.com/public/docs/Lvm.pdf
30 pages including 5 appendixes.
It explains ALL and I mean ALL about LVM including striping, clustering,
mirroring, concatenation and all the other stuff that you don't really
need to know about, not least of all use with RAID. It goes into
performance comparisons with and without LVM, with ext2 vs resiser, with
striping, with clustering
It describes all about setting up and using LVM, both with the CLI and
with YAST. Its the screenshots that take up page after page!
At page 15 there are the three command that matter:
Wrotehttp://cdn5.howtogeek.com/wp-content/uploads/2011/01/lvm-cheatsheet.png
What this all boils down to is that if you can can handle zypper to add
repositories and add packages, LVM isn't any more complicated.
90% of the time you use lvcreate and lvresize and perhaps lvremove.
oh and lvscan which is the 'ls' of LVM just as 'lsusb' is the 'ls' of USB.
Familiarity helps, as with everything.
When you are dealing with large drives or with RAID arrays making up
lots of storage, dynamic provisioning is very nice!
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