Re: [MLUG] backup

[Mikhail Kovalenko <EMAIL:PROTECTED>]

Mike Miller wrote:
> On Wed, 14 May 2003, Matthew Ross wrote:
> 
> 
>>It isn't only security, but availability. If this is used 24/7, certain
>>methods simply won't work. I prefer to block out the rest of the world,
>>run my backup, and then let everything back in again when finished,
> 
> [snip]
> 
> Just curious -- does it cause a problem to use a "tar | gzip" approach
> when the files being backed up are being written to by other processes?
> It seems to me that it wouldn't really mess up the backup, but I'm not
> sure.  You'd have some incomplete data, but is that worse than blocking
> out the world and having none of that data?
> 

tar will complain if the file it's working on suddenly changes but will 
archive it anyway. However, in case of a database, it may be recorded in an 
unpredictable state violating data integrity.

-- 
MK

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