Advice on external backup of a Linux server.

[Arthur Pemberton]

Felipe Alfaro Solana wrote:

> On 10 Feb 2005, at 19:26, Arthur Pemberton wrote:
>
>>> LVM is setup by default on fc3 and RHEL4 when it is released. its a
>>> better idea in the long term
>>>
>> I've done some reading, but I honestly can't see what makes it such a 
>> better idea. I'm guessing I just haven't happened upon a situation 
>> where I wished i had it.
>> Got any practical scenarios, just out of curiousity.
>
>
> LVM2 snapshots allow you to backup live filesystems. Usually, you 
> shouldn't backup a live (i.e. mounted and being used) filesystem with 
> utilities like "tar" and company, since they can't lock files being 
> backed up to avoid changes made by running processes.
>
> A LVM2 snapshot, however, guarantees consistency as it "takes an 
> image" of the filesystem and freezes it which can be backed up to 
> tape, or to remote storage without worrying about possible 
> inconsistencies caused by running processed modifying data.
>
That seems very good, where can I find more information about this? Or 
what should I google for exactly?