[Nottingham] Depth first or breadth first for faster backups?
fluf at freeshell.org
Sat May 5 08:48:13 BST 2007
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On Sat, 5 May 2007, Dale Einarson wrote:
> Date: Sat, 5 May 2007 00:32:56 +0100
> From: Dale Einarson <Dale.Einarson at nottingham.ac.uk>
> Reply-To: nottingham at mailman.lug.org.uk
> To: nottingham at mailman.lug.org.uk
> Cc: dale at bic.mni.mcgill.ca
> Subject: Re: [Nottingham] Depth first or breadth first for faster backups?
> Heyla, ( 5th try to get an email to the list )
> -- I'm new to the group, this is my first post ( hello everyone )
> Phil Lakin wrote:
>> I highly recommend amanda (www.amanda.org) for tape backups, also works
>> quite well to disk. Ideal if you have a lot of partitions / disks /
>> servers to backup. We use it to backup and restore over 10TB with no
> Rsync is great for many things but if you want an archive with an
> history, I second the amanda suggestion. It can be a bit finicky at
> first but once it gets going...
> I have found a spanning tapes deficit; If the directory you wish to
> back up is larger then the tape size ( or the dumper directory ) it will
> fail. You need to break your source directories in the chunks that are
> smaller then the tapes ( or dumper directories ) you backup to.
> In the past I had used amanda to make nightly backups of my files to a
> temp disk. very fast and useful for a quick restore of the important
> working files!
> I could provide you with my conf if this might help.
>> On Wed, 2007-05-02 at 13:26 +0100, Martin wrote:
>>> OK Folks,
>>> A question for tonight:
>>> For traversing through directories and files, what should be the faster:
>>> Walking through the directories and files going depth first or breadth
>>> I would guess that just doing a simple "dd" would be quickest and
>>> minimise HDD head movements... But then that's only useful if you're
>>> near 100% utilisation and you're going to mount the dd copy as an image!
> The height and depth and breath my search can reach? (EBB)
> gnufind is depth first, I assume that would be the fastest way.
> Certainly the FS does play a part of the data storage... However, if
> the FS is stagnant the slocate should do the job as reading on file is
> faster then traversing directories
> There seems to be some hangup with mail between machproductions and
> lug.org.uk... lug.org.uk is not getting my machprod email, but I have
> just found that it is not sending to machprod either :(
> Thanks to Martin for his help.
>>> On a related theme:
>>> What utilities do people use for their backups?
>>> See ya later,
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