Why r we not use tablespce begin backup with read only tablespace

why r we not use tablespce begin backup with read only tablespace

Please learn English prior to posting. The schools in India are not that bad!
Please RTFM.
Please stop asking doc questions at lightning speed.
Please go figure
Sybrand Bakker
Senior Oracle DBA

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Apple Support Communities Updates <[email protected]> 於 2014年12月15日下午10:12 寫道：
You received a reply
Barry Hemphill <https://discussions.apple.com/people/Barry+Hemphill?ac_cid=op123456> has replied to your question. You can view the full discussion <https://discussions.apple.com/message/27291392?ac_cid=op123456#27291392> in Apple Support Communities.
why I could not use "find my iPhone" with my Mac.? <https://discussions.apple.com/message/27291392?ac_cid=op123456#27291392>
Sign in to iCloud:
https://www.icloud.com <https://www.icloud.com/>
Then click on "find my." Find my iPhone must be turned on on the phone.
Barry
Correct Answer <https://discussions.apple.com/email/thread/6725298/correct/27291392> Helpful Answer <https://discussions.apple.com/email/thread/6725298/helpful/27291392>
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Data warehouse backups and read only tablespaces

Hi all,
I am working on a data warehouse database with following specs:
Version: Oracle 10.2.0.3 Enterprise
OS: Solaris
App: Data warehouse
We use RMAN to take 'level 0' & 'level 1' backups. We have block change tracking enabled and RMAN backups up data files and archive logs straight to tape.
I am exploring ways of reducing the 'level 0' backups and was specifically focussing on using read-only tablespaces for this purpose.
I have often seen it mentioned that a best practice in D/Ws is to store the old static partitions of fact tables in read only tablespaces so as to reduce the backup size.
In case you have already implemented such a scheme, I would like to know how you have implemented it.
I am thinking of the following mechanism:
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-- If the latest SCN has not changed since last backup and the tablespace is in read only mode then
-- Check if a backup copy of the tablespace has been done within the recovery window and is accessible.
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-- If the tablespace is read/write then back it up.
I haven't delved into the low level details, but this seems to be lot of work. So just wanted to know from you if there's any ready made feature which makes all this easier.
Many thanks in advance.

Thank you so much for your help.
Backup optimization was indeed the thing I was looking for. To be honest I had done a bit of RTFM, but I didn't check the advanced user guide.
Although my specific question has been answered, it would be interesting to know what other things other people are implementing to reduce backups etc.
I am also thinking of following options:
-- Turn on index monitoring to get rid of unused indexes.
-- Stop the backups of 'index' tablespaces.
-- Archive off old data.
Any other ideas for reducing DW backup size?
Many thanks.

I want to use ZFS filesystem compression on a history database with read-only tablespaces. What is the best way to get the datafiles compressed?

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sql statement
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|   0 | SELECT STATEMENT     |                    |       |       |       |   176K(100)|          |
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Hello Bret,
I'm using oracle 11.2
Thanks & Regards,
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Hi Cozumel,
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Why r we not use tablespce begin backup with read only tablespace

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