Re: Differential incremental backups
- From: Jason Heinrich <jheinrichdba@xxxxxxxxx>
- To: cicciuxdba@xxxxxxxxx
- Date: Thu, 18 Mar 2010 08:56:58 -0600
Like levels 1 and 2, they are for backing up those blocks that have changed
since the previous higher-level backup. They simply allow for breaking your
incremental backup strategy into more pieces -- a deeper hierarchy if you
will. I imagine not many people use them, but they're there if you want
them.
--
Jason Heinrich
On Thu, Mar 18, 2010 at 8:47 AM, Guillermo Alan Bort
<cicciuxdba@xxxxxxxxx>wrote:
> Andrey,
>
> can you point to any documentation regarding levels 3 and 4? I can't seem
> to find any, and can't fathom what they are for.
>
> cheers.
> Alan.-
>
>
>
> On Thu, Mar 18, 2010 at 11:02 AM, andrey khudyakov <
> andrey.hudyakov@xxxxxxxxx> wrote:
>
>> Small clarification.
>> in fact, there are 5 levels of incremental backups.
>> 0 - is the base level, and 1-4 incremental levels
>>
>> 2010/3/18 Guillermo Alan Bort <cicciuxdba@xxxxxxxxx>
>>
>> According to Oracle Courseware (it's been a while, but I think I remember
>>> it right). There are Full Backups and Incremental Backups. Full Backups take
>>> the entire database, Incremental backups have different levels.
>>> Level 0 Incremental Backup: Takes the entire database (works just like a
>>> full backup, but is used for base point to level 1 and 2 incremental
>>> backups).
>>> Level 1 Incremental Backup: backs up all blocks changed after the most
>>> recent incremental backup at level 1 or 0
>>> Level 2 Incremental Backup (differential): backs up all blocks changed
>>> after the most recent incremental backup at level 0
>>>
>>>
>>>
>>>
>>
>
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