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Old 10-23-2016, 10:36 PM   #1
sigint-ninja
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LVM logical volumes mostly used


hi guys,

are LVM logical volumes mostly used these days on production servers...has it become the norm?
 
Old 10-24-2016, 12:06 AM   #2
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It's the default for a fedora desktop install. But I'm not a fan of that type of setup as it requires extra tools to be installed on an otherwise minimum installation of linux just to look at what's there. If I'm going to need extra tools and have to learn new methodologies, it might was well be ZFS IMO.
 
Old 10-24-2016, 05:37 AM   #3
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Quote:
Originally Posted by sigint-ninja View Post
... on production servers...has it become the norm?
Yes, on all I've seen.
Has been for a long time - and if you're thinking of getting (RH) certification, you'd better be comfortable with LVM.
 
Old 10-24-2016, 08:02 AM   #4
sigint-ninja
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syg00

yes planning to go for rhcsa in the future...thanks again
 
Old 10-24-2016, 10:19 AM   #5
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You can practice with LVM by leaving a small free partition on your main disk + a few partitions on a USB stick.
This would give you several small PV's & you could create a couple of VG's into which you could define several LV's.

Try mounting/unmounting LV's and run the various resizing commands etc...
 
Old 10-24-2016, 07:10 PM   #6
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FWIW I found having a spare (old, slow) machine available to play on worked best. CentOS nowadays is an excellent facsimile of RHEL for training on. Multiple disks allow for trying different setups; using the Redhat virtualization tools will allow you to get the feel of how they do things - especially bridging for the guests.
If you screw it up attempt to fix it. Even if you are satisfied, erase it all and do it again.
There is no substitute for "hands on" experience - especially as there are time constraints.
 
Old 10-29-2016, 11:11 AM   #7
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Thats what im doing...found an old duel core with 3gb RAM installed centos 7 loads of times...this time i will use lvm with xfs
will change partition sizes etc...though i know you cant shrink an xfs partition
 
  


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