POV-Ray : Newsgroups : povray.off-topic : Backup Server Time
2 Nov 2024 18:50:34 EDT (-0400)
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From: Invisible
Subject: Backup
Date: 18 Mar 2008 06:43:44
Message: <47dfaaf0$1@news.povray.org>
"Backup my harddrive? How do I put it into reverse?"

So spake the proverbial n00b. But seriously, in a business environment, 
backing up critical data is pretty important.

What do you use to back up data? I'm not talking about permanent 
archival, I'm talking about rolling backups so that if a small meteorite 
hits your server room, you don't loose all the data you're working on.

I just managed to exceed the capacity of our current backup system. I 
mean, I can temporarily work round it, but using a system that can 
backup less than 1/3 of the data your server is capable of storing isn't 
very smart. So we're going to have to invest in some better hardware. 
What would you buy?

[I imagine this one is going to be dictated to me by HQ, but I'm curios...]

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*


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From: scott
Subject: Re: Backup
Date: 18 Mar 2008 07:19:59
Message: <47dfb36f$1@news.povray.org>
> What do you use to back up data? I'm not talking about permanent archival, 
> I'm talking about rolling backups so that if a small meteorite hits your 
> server room, you don't loose all the data you're working on.

Our backups are usually used when someone accidentally deletes a file (or a 
lot of files!) from the server...

AFAIK over at IT they use a tape backup system - it runs every night on a 
rolling basis, I think at the moment you can get a backup from the last 7 or 
10 days, after that they start overwriting.  On top of that weekly ones are 
kept and stored separately (so I assume that allows you to get back 7 or 10 
weeks).  It's pretty complex and I don't know much about the details - but I 
do know that a while back they had to make some changes because there wasn't 
enough time overnight to do the backup :-)


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From: Invisible
Subject: Re: Backup
Date: 18 Mar 2008 08:50:30
Message: <47dfc8a6$1@news.povray.org>
scott wrote:
>> What do you use to back up data? I'm not talking about permanent 
>> archival, I'm talking about rolling backups so that if a small 
>> meteorite hits your server room, you don't loose all the data you're 
>> working on.
> 
> Our backups are usually used when someone accidentally deletes a file 
> (or a lot of files!) from the server...

Well, yeah, that's what you end up actually *using* the system for. ;-)

[Or maybe just because Word crashed and ate your document, and you don't 
want to start from scratch again.]

> AFAIK over at IT they use a tape backup system - it runs every night on 
> a rolling basis, I think at the moment you can get a backup from the 
> last 7 or 10 days, after that they start overwriting.  On top of that 
> weekly ones are kept and stored separately (so I assume that allows you 
> to get back 7 or 10 weeks).  It's pretty complex and I don't know much 
> about the details

Nah. Sounds like exactly what we have here.

> but I do know that a while back they had to make 
> some changes because there wasn't enough time overnight to do the backup 
> :-)

Well, that's why we only back up "changed" files nightly, and do a full 
backup at the weekends only. It used to be touch and go whether it would 
complete by Monday - but since I installed higher capacity drives, it 
seems to back up very much faster.

No, the limitation I'm running into now is space, not time.

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*


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From: scott
Subject: Re: Backup
Date: 18 Mar 2008 09:26:46
Message: <47dfd126$1@news.povray.org>
> No, the limitation I'm running into now is space, not time.

Buy some bigger tapes then, or more of the current ones?


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From: Invisible
Subject: Re: Backup
Date: 18 Mar 2008 10:09:43
Message: <47dfdb37$1@news.povray.org>
scott wrote:
>> No, the limitation I'm running into now is space, not time.
> 
> Buy some bigger tapes then, or more of the current ones?

DDS only goes up to a maximum of 80 GB. My server holds 103 GB. Time to 
move to a different tape technology - but which one? There are many to 
choose from.

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*


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From: Invisible
Subject: Re: Backup
Date: 18 Mar 2008 10:10:30
Message: <47dfdb66@news.povray.org>
Invisible wrote:

> [I imagine this one is going to be dictated to me by HQ, but I'm curios...]

Yah, I was right. They're sending us an LTO-1 robotic library.

[Great. Now I have to Google "serial-attached SCSI"...]

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*


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From: Phil Cook
Subject: Re: Backup
Date: 18 Mar 2008 11:42:27
Message: <op.t770lqewc3xi7v@news.povray.org>
And lo on Tue, 18 Mar 2008 15:10:27 -0000, Invisible <voi### [at] devnull> did  
spake, saying:

> Invisible wrote:
>
>> [I imagine this one is going to be dictated to me by HQ, but I'm  
>> curios...]
>
> Yah, I was right. They're sending us an LTO-1 robotic library.

That's a shame I thought they were going to suggest using 5 (or 7) hot  
swap drives and mirroring them each day before archiving them off to tape.

It all depends on what level of back-up you require. Heh my favourite is a  
company that used the grandfather/father/son system of backups, but reused  
the tapes. So Day 1: GF, Day 2: F, Day 3: S, Day 4: GF etc. I'm sure you  
can all see the problem.

-- 
Phil Cook

--
I once tried to be apathetic, but I just couldn't be bothered
http://flipc.blogspot.com


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From: Eero Ahonen
Subject: Re: Backup
Date: 18 Mar 2008 13:01:46
Message: <47e0038a$1@news.povray.org>
Invisible wrote:
> 
> What do you use to back up data? I'm not talking about permanent 
> archival, I'm talking about rolling backups so that if a small meteorite 
> hits your server room, you don't loose all the data you're working on.

At work? LTO-II with robotic library capable of 14 tapes.

Or at home? I just acquired a used Dell Powervault 120T DLT-robot.
http://support.euro.dell.com/support/edocs/storage/adic7000/ug/specs.htm

Now I'll need to find some cleverly priced DLT-tapes ;).

> very smart. So we're going to have to invest in some better hardware. 
> What would you buy?

 From the earlier mention of 'bout 100G of data, I'd shoot for 200G LTO.

> [I imagine this one is going to be dictated to me by HQ, but I'm curios...]
> 


-- 
Eero "Aero" Ahonen
    http://www.zbxt.net
       aer### [at] removethiszbxtnetinvalid


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From: Tom Austin
Subject: Re: Backup
Date: 18 Mar 2008 14:38:37
Message: <47e01a3d$1@news.povray.org>
Invisible wrote:
> scott wrote:
>>> No, the limitation I'm running into now is space, not time.
>>
>> Buy some bigger tapes then, or more of the current ones?
> 
> DDS only goes up to a maximum of 80 GB. My server holds 103 GB. Time to 
> move to a different tape technology - but which one? There are many to 
> choose from.
> 

I'm backing up 180 GB at the moment

The storage space for data is 250GB.

The backup space available is 250GB - but not everything in the data is 
backed up.

Backups take 2.5 hours to run at the moment.


Tom


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From: Darren New
Subject: Re: Backup
Date: 18 Mar 2008 18:17:31
Message: <47e04d8b@news.povray.org>
Invisible wrote:
> DDS only goes up to a maximum of 80 GB. My server holds 103 GB. 

Sorry. Something looks wrong in these numbers. 103 GB? You don't mean 
103T?  I can't even go to the store and buy a hard drive that small, 
unless it's a laptop hard drive. You could mirror the whole drive every 
day of the week for about $500.

-- 
   Darren New / San Diego, CA, USA (PST)
     "That's pretty. Where's that?"
          "It's the Age of Channelwood."
     "We should go there on vacation some time."


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