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IDS Forum

Re: Informix backup question

Posted By: Fernando Nunes
Date: Wednesday, 7 September 2016, at 11:33 a.m.

In Response To: Informix backup question (CHUAN LU)

You already recieved two different answers... let's go for the third:
I don't thisnk we can answer this simply.... You can do the backup in three
ways:

1) Ontape. In that case the backup image for all the dbspaces is exactly
how it was at 3AM
2) Onbar whole system backup. Similar to ontape, but can be run in paralell
3) Onbar non-whole system backup. In this case the physical image of
different dbspaces will have different timestamps. As such if the PIT you
want is later thant the start of the last dbspace then you should be able
to restore the PIT with this image. Otherwise you won't.

When you request the PIT onbar will "see which image it needs. As long as
you still have it, you don't need to worry about it. But it's good to
understand the process because the time will be different (depending on how
many logs you have to apply)

HTH

On Wed, Sep 7, 2016 at 4:38 PM, CHUAN LU <luchuan@cn.ibm.com> wrote:

> Question 1:
> when IDS start to do a backup on 3 AM , Do the backup only include those
> transaction data before 3 AM?
>
> Queston 2:
> When IDS is doing the backup ? there are still some new transactions,when
> do
> the checkpoint,where those dirty page will be flushed to ? Is it temporary
> dbspace?
>
> Question 3:
> If IDS start to do a backup on 3 AM , and finish the backup on 7 AM in the
> same day, could I use this backup image to restore the PIT 4 AM instead of
> to
> use yesterday backup and logical log?
>
> thanks for your time.
>
>
> ************************************************************
> *******************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

--
Fernando Nunes
Portugal

http://informix-technology.blogspot.com
My email works... but I don't check it frequently...

--94eb2c05fb201a9520053beca466

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