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HOT backup Question [message #192864] Thu, 14 September 2006 00:16 Go to next message
gkrishn
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Wht happens if any update happen during hot backup of database.Will it write the update info only to redologs?Are all datafiles are completely locked from any changes?

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Re: HOT backup Question [message #192877 is a reply to message #192864] Thu, 14 September 2006 01:15 Go to previous messageGo to next message
tridentadm
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Registered: March 2006
Senior Member
it is supposed to write update information to redo-logs.

the datafile header is frozen.

u need not worry if any update/delete/insert/select takes place during hot-backups.

infact that is the actual purpose of hot-backups.

alter tablespace <tbs> begin backup;

hopefully u are refering to above command.

unless u have a different meaning to the word HOT

Smile

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Re: HOT backup Question [message #192878 is a reply to message #192864] Thu, 14 September 2006 01:20 Go to previous messageGo to next message
gkrishn
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Registered: December 2005
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So once after we issue command END BACKUP,all infor in redo logs will write to datafiles automatically,right ?
and how about archiver,wil it archive the log very immediately?

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Re: HOT backup Question [message #192929 is a reply to message #192877] Thu, 14 September 2006 04:50 Go to previous messageGo to next message
Mahesh Rajendran
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alter tablespace <tbs> begin backup;
hopefully u are refering to above command.
unless u have a different meaning to the word HOT

Said method is old. It has a lot of drawbacks.
Use RMAN. No need put the tablespaces in begin backup/end backup mode.

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Re: HOT backup Question [message #192930 is a reply to message #192878] Thu, 14 September 2006 04:52 Go to previous message
Mahesh Rajendran
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>>Wht happens if any update happen during hot backup ....
http://www.orafaq.com/forum/m/149622/42800/?srch=Tim+Gorman#msg_149622

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