[linux] backup and storage
Justin S. Williams
taliesin at u.washington.edu
Wed Feb 14 17:01:22 PST 2007
Nice. I'll have to look at this and see how it compares to my scripts.
It's based on the same idea: "rsnapshot was originally based on an
article called Easy Automated Snapshot-Style Backups with Linux and
Rsync, by Mike Rubel. "
From: linux-bounces at mailman1.u.washington.edu
[mailto:linux-bounces at mailman1.u.washington.edu] On Behalf Of Robert
Sent: Wednesday, February 14, 2007 4:02 PM
To: Linux/Unix Users Group at the UW
Subject: Re: [linux] backup and storage
... let rsnapshot do it for you
Justin S. Williams wrote, on 02/14/07 15:57:
> Detailed at the following web page are instructions about using rsync
> to create an incremental backup that gives you a full snapshot for any
> given day. Basically it works by using "cp -al" to create a second
> set of hard links to an initial full snapshot (which doesn't duplicate
> the data on disk, only the links to the inodes), and then using rsync
> to update the new copy. The end result is that you can have what
> appears on the filesystem to be complete full snapshots for each day
> while only using the disk space of an incremental snapshot.
> I've used this technique with great success and I find it far more
> useful than using tar. However, I'm curious if you (or anyone else
> here) have looked into this and have found using tar across ssh to be
> more useful/functional, or if there are factors I've not considered in
> my backup scheme.
> Justin Williams
> -----Original Message-----
> From: linux-bounces at mailman1.u.washington.edu
> [mailto:linux-bounces at mailman1.u.washington.edu] On Behalf Of Donald
> Sent: Wednesday, February 14, 2007 2:43 PM
> To: Linux/Unix Users Group at the UW
> Subject: Re: [linux] backup and storage
> It doesn't take a lot of processing power to set up a software raid
> and sync the files. You can use pretty much anything in the P4 class.
> 512 megs of ram is plenty.
> Since the University has a site license for RHEL, why not just use the
> current version? If you're using this for a personal project, you can
> use CentOS, which originated as a free (as in beer as well as
> speech) alternative to RHEL. Personally, I just use tar piped across
> ssh (rsync doesn't work for me as I'm interested in multiple backups
> with so that I can restore to a specific date).
> On Feb 14, 2007, at 2:28 PM, Helen Petropoulos wrote:
>> Hi Alan,
>> That sounds like just the advice that I was looking for, but I was
>> wondering, when you say barebones system, what's the minimum
>> that I should look at? What's the minimum version number of RHLE
>> I should use?
>> I've worked on Unix systems, but I'm new to Linux and I'm not sure
>> where to look for this kind of information.
>> On Feb 14, 2007, at 1:37 PM, Alan Gibson wrote:
>>> the best solution depends somewhat on what you are trying to
>>> if you want to archive stuff, dvd may be best. if you just want
>>> redundant backups, i would set up a NAS.
>>> take a cheap barebones system, add a 4 port sata card and 4 250GB
>>> drives. use mdadm to turn the drives into a 1TB raid. then set up an
>>> hourly cron job that backs the whole thing up with rsync. the great
>>> thing about rsync is that it only transfers what has actually
>>> this solution would be cheap, easier to maintain than tape or dvd,
>>> not to mention it would be a whole lot faster. if you need more
>>> storage, just put in another sata card and some drives and add them
>>> to the raid (you might want to pay a little extra for a big power
>>> backing up multiple systems would be trivial; just give the backup
>>> server an account on every system you want to back up and let it go
>>> out and fetch the files.
>>> now if your data is irreplaceable, you should really have multiple
>>> copies, at least one being off site. there is always a chance that
>>> the building will burn down. in this case i would say either add
>>> weekly dvd backups and take them home with you, or sign up for one
>>> the new remote backup services that are coming online.
>>> On 2/14/07, Helen Petropoulos <elenip at u.washington.edu> wrote:
>>>> I have a DELL PowerEdge 700 running linux and I was wondering what
>>>> kind of backup system I should obtain for it. I would like at
>>>> 1 T of storage. Is there something that someone out there
>>>> recommends? Should I get an external jukebox? I would also like
>>>> be able to back up other machines onto this one.
>>>> Thanks in advance,
>>>> Helen - Dept of Radiology
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