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Old 03-31-2013, 09:08 PM   #1
techux
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LVM or not for big partitions 1.5TB+


Hey guys..

I am installing RHES5 in a proliant server, which is connected to a storage via SAS.. the idea is to create a /var partition in this volumen(1.5TB). The developer says to no use LVM.

but after reading , it seems that it is a good idea to use LVM for multi-terabyte filesystem in an external storage..

any thoughts about it?

and I would be configuring multipathing as well.
 
Old 04-01-2013, 11:39 AM   #2
trey85stang
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i rarely ever use anything but lvm... you dont give enough info though. What developer says not to use LVM?
 
Old 04-01-2013, 01:13 PM   #3
rknichols
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Unless you don't have enough contiguous space for the partition, I see no reason why the size of the partition should much affect the decision about whether to use LVM, which should be from factors such as the likelihood of future change, need for special features like snapshots, etc.
 
Old 04-02-2013, 08:52 AM   #4
techux
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thanks both for the answers..

the developer is the developer of the application..


Quote:
Originally Posted by rknichols View Post
Unless you don't have enough contiguous space for the partition, I see no reason why the size of the partition should much affect the decision about whether to use LVM, which should be from factors such as the likelihood of future change, need for special features like snapshots, etc.
I dont really think there will be any change of the partitions, once the filesystem is created it wont change.

if we want to do some snapshots, do we need LVM?

the system is being installed in a SAS storage and booting from it.

so booting from storage I am not sure if it is better use LVM for UUID consistency ifff something is changed in the volume of the storage(if shouldnt happen but you never know.)


thanks
 
Old 04-02-2013, 02:07 PM   #5
rknichols
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If you want to do snapshots, you would need to use either LVM or some filesystem, such as btrfs, that supports snapshots itself. The ext2/3/4 filesystems do not include a snapshot feature.

You can use LVM, UUID, or the filesystem label as an identifier. Just don't use the device name (like "/dev/sda2") since that can change due to factors that you might not expect to affect it. If you do use LVM, be sure to choose a more unique and descriptive volume group name than the default "vg00" lest you one day find yourself with two identically named volume groups attached to the system.
 
Old 04-02-2013, 07:56 PM   #6
jefro
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I was thinking that they wanted to just put the /var online to some sas.

You'd have to ask why the developer claims lvm is bad. It is pretty much standard for big iron.
 
  


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