Karanbir Singh wrote:
> On 02/24/2010 07:44 PM, Les Mikesell wrote:
>>> Err.. raid is NOT backup solution.
>> Neither is a snapshot in another location on the same machine.
>
> Thats not true, raid is an online setup - different location could be
> point in time, and on blockdev;s that dont share user access load. Which
> in turn makes it easier to do intensive complete backups to offsite
> without impacting user level of service the machine can deliver, amongst
> other things[1].
>
> Dont compare apples to banana's and call them oranges.
Yes and no... There's an overlapping set of possibilities that they do and don't
back up. They both cover single disk failures. They don't cover big operator
errors (rm -rf /), building/site disasters, some types of controller/electrical
issues, etc. The snapshots give you a short history that can help with small
user/operator errors at the expense of being out of date when the live disk
fails. So have several types of fruit to stay healthy.
--
Les Mikesell
lesmikesell at gmail.com