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Re-creating partitioned tablespaces from backup. [message #235909] Tue, 08 May 2007 06:52 Go to next message
Brayan
Messages: 315
Registered: June 2002
Senior Member
Hi,

I have a table which is groving rapidly. which has a column Date.

I've partitioned this table monthwise into different tablespace.

We require last one years data and I've made the history data i.e. beyond one year as readonly(tablespace readonly).

If I take a backup and remove the history tablespace, in future if I require this removed data can I restore datafiles and recreate those partitioned tablespace and make the data available.

Please suggest me how to do this. Any specific document to this will help me.

Brayan.

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Re: Re-creating partitioned tablespaces from backup. [message #235919 is a reply to message #235909] Tue, 08 May 2007 07:23 Go to previous messageGo to next message
sriram717
Messages: 48
Registered: February 2007
Location: UNITED KINGDOM
Member
Hi,
As long as you have a backup of the readonly datafile you should be safe.But You were mentioning that you are going to remove (drop?) the history tablespace.Ideally oracle will not allow you to do a drop of this tablespace but will raise an error
"ORA-14404: partitioned table contains partitions in a different tablespace".

so you need to do an exchange partitions of the table so that the tablespace can be dropped.

Now before doing this take a backup of the control file and if you ever want to recover you may need to rollforward from here so that all your readonly files are included as well.

Thanks

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Re: Re-creating partitioned tablespaces from backup. [message #235926 is a reply to message #235909] Tue, 08 May 2007 07:35 Go to previous messageGo to next message
Brayan
Messages: 315
Registered: June 2002
Senior Member
Thanks Sriram for for your detailed explanation.

My requirement is to purge the history data. That is why I thought of dropping a partition.

Thanks.

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Re: Re-creating partitioned tablespaces from backup. [message #236082 is a reply to message #235909] Wed, 09 May 2007 00:29 Go to previous messageGo to next message
Brayan
Messages: 315
Registered: June 2002
Senior Member
Hi,

Is there a better way to purge the history data from a tablespace( I mean entire partitioned tablespace).

Regards,
Ronald.

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Re: Re-creating partitioned tablespaces from backup. [message #236128 is a reply to message #236082] Wed, 09 May 2007 02:43 Go to previous messageGo to next message
sriram717
Messages: 48
Registered: February 2007
Location: UNITED KINGDOM
Member
Yes , The oracle way for this is

"Oracle Information Lifecycle Management" more tailored for oracle 10g but going through the link below you can tailor make it for your needs.

http://www.oracle.com/technology/deploy/ilm/index.html

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Re: Re-creating partitioned tablespaces from backup. [message #236195 is a reply to message #235909] Wed, 09 May 2007 04:45 Go to previous messageGo to next message
Brayan
Messages: 315
Registered: June 2002
Senior Member
Hi Sriram,

The ILM document talks about 10g. My database 9.2.0.7 on HP-UX.

So, In 9i how can I manage the same. Any other solution will also help me.

Brayan

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Re: Re-creating partitioned tablespaces from backup. [message #236202 is a reply to message #236195] Wed, 09 May 2007 05:08 Go to previous message
sriram717
Messages: 48
Registered: February 2007
Location: UNITED KINGDOM
Member
Hi ,

I had mentioned earlier as well that this more of a 10g technology , but all these are available in 9i as well ..you need to rework the same ..this is only a technology term that is bundled with 10g , you can use this in 9i as well , read the doc thoroughly which make things clear and you can impelement the same in 9i as well.
Try it out

Thanks

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