[Gllug] Restore RAID0 /var

[general_email at technicalbloke.com]

Hari Sekhon wrote:
> gvim wrote:
>   
>> John Winters wrote:
>>   
>>     
>>> Yes - just buy yourself another hard disk (or pair of hard disks) and
>>> restore /var from your most recent backup.  You do take backups don't you?
>>>
>>> That sort of configuration makes me wince.  *Why* exactly is /var spread
>>> over two RAID0 volumes?
>>>
>>> John
>>>     
>>>       
>> So it is possible. Others seem to disagree. /var is configured this way because I want to do some testing of MySQL and PostgreSQL performance for a web application which will have a lot of backend data to search on a regular basis. It's Linux software RAID at the moment but I'd be using a raid card once it goes live. I'm not worrying about data loss right now but need to know for the future if I can restore just /var from a backup if the disk with /boot, swap, / is still OK.
>>
>> gvim
>>   
>>     
> gvim, I understand that you're obviously not a professional sysadmin, 
> but why don't you consider using RAID as it was meant to be used, to 
> prevent data loss from hard drive failure instead of talking about 
> restoring from backup, which would mean downtime for you application?
>   
Er, I believe he explained that, he has "a lot of backend data to search
on a regular basis" and his business right now is performance testing.
There's nothing wrong with using RAID for performance over reliability
if you're happy to suck up the increased risk of downtime and data loss.

Roger.
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