Re: Quick migration question

Tanel,

Thank you very much for the insight, it's been very useful for me.


Regards
Diego.


----- Original Message ----- 
From: "Tanel Põder" <tanel.poder.003@xxxxxxx>
To: <oracle-l@xxxxxxxxxxxxx>
Sent: Tuesday, July 06, 2004 4:00 PM
Subject: Re: Quick migration question


> The upgrade speed doesn't really depend on how much actual data you got in
> your tables.
> The most time-consuming job in an upgrade like this, is the migration of
> data dictionary and recompilation of objects. Other changes, like changing
> controlfiles, datafile headers, logfiles and rollback segments, will
usually
> take little time.
>
> Oracle will NOT go through any datafile to change or reformat any
datablocks
> during the upgrade (it didn't do so even when the data block format
changed
> fundamentally between version 7.3 and 8, it just reformatted required
blocks
> later on, "on the fly").
>
> So if you don't have much more objects and PL/SQL in your current system
> than the last one upgraded (and don't have tens of thousands of
datafiles),
> you should be able to complete your upgrade about in the same timeframe
than
> the last one.
> I'd say in less than couple of hours without any tweaks or tricks, given
> than you could recompile your PL/SQL & other objects in parallel.
>
> It's possible to get the upgrade process very fast - but this means
> unsupported parameters & techniques.
>
> Tanel.
>
> ----- Original Message ----- 
> From: "Diego Cutrone" <diegocutrone@xxxxxxxxxxxx>
> To: "Oracle List" <oracle-l@xxxxxxxxxxxxx>
> Sent: Wednesday, July 07, 2004 4:41 AM
> Subject: Quick migration question
>
>
> > Hi list,
> > Based on your experience, how much time you think it may take to migrate
a
> 2.1 TB database from 8.1.7 to 9.2
> > by using "startup migrate" procedure. The database is in a HP Superdome
> with 16CPUs 64GB Ram.
> > I know the time depends on many other factors but I'd just like to have
a
> rough estimation....that's all.
> >
> > I have used this procedure in a much smaller database and didn't take a
> long time to complete,
> > I wonder how much it will take in a much bigger database. Had anyone
> performed a migration like this?
> >
> > Thanks in advance.
> > Regards
> > Diego.
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