Re: Backups versus snapshots

From: Kevin Closson <ora_kclosson_at_yahoo.com>
Date: Thu, 18 Sep 2014 11:46:47 -0700
Message-ID: <1411066007.75008.YahooMailNeo_at_web121203.mail.ne1.yahoo.com>

array snapshots that are crash consistent don't require the database to be in backup mode (all EMC and most all other array snap technology I know of are crash consistent)

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 From: Seth Miller <sethmiller.sm_at_gmail.com> To: kmoore_at_zephyrus.com
Cc: Kevin Closson <ora_kclosson_at_yahoo.com>; "andrew.kerber_at_gmail.com" <andrew.kerber_at_gmail.com>; "Oracle-L_at_freelists.org" <oracle-l_at_freelists.org> Sent: Thursday, September 18, 2014 10:06 AM Subject: Re: Backups versus snapshots  

Is it safe to assume these snapshots are being taking with the database in backup mode?

What is the procedure for restoring a non-critical datafile?

What is the procedure for repairing block corruption?

You don't have to be an old school DBA to have concerns about this. It's not necessarily a bad thing to not have backups as long as everyone involved is aware of and accepts the consequences and loss of functionality of not having them.

Seth Miller

On Thu, Sep 18, 2014 at 11:46 AM, Keith Moore <kmoore_at_zephyrus.com> wrote:

The purpose would be to have a backup if there is a catastrophic SAN failure.
>I know EMC and other storage vendors like to think that cannot happen but I've
>seen it four or five times over the years, mostly due to human error.
>
>Your database is gone which makes the snapshot (if it still exists) invalid.
>
>FYI, we will be using ExtremIO and there are a lot of good things about the
>VBlock. I'm just not comfortable with having zero backups.
>
>Keith
>
>
>> great thread.
>>
>> In this specific model would the purpose of RMAN backup to make sure you're
>> not backing up corrupt blocks?
>>
>>
>>
>>
>>
>>
>>
>> Kevin Closson
>> Chief Performance Architect - XtremIO
>> EMC
>>
>>
>> ________________________________
>> From: Keith Moore <kmoore_at_zephyrus.com>
>> To: andrew.kerber_at_gmail.com
>> Cc: "Oracle-L_at_freelists.org" <oracle-l_at_freelists.org>
>> Sent: Thursday, September 18, 2014 9:17 AM
>> Subject: Re: Backups versus snapshots
>>
>>
>> I agree. They do not want to pay for the backup infrastructure so if that is
>> the final decision by the architecture team, rman backups will not be an
>> option.
>>
>>
>>
>>
>>> Keep snapshots and rman backups. Belt and suspenders.
>>>
>>> Sent from my iPhone
>>>
>>
>>
>> --
>> http://www.freelists.org/webpage/oracle-l
>
>
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>

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Received on Thu Sep 18 2014 - 20:46:47 CEST