Topic: Backup & Recovery >> User managed hot backup
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| Title: User managed hot backup |
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Posted: Feb 22, 2008 12:10:49 AM |
Total Post: 46
Joined: Sep, 2007
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Hi all,
while i m taking the user managed hot backup ,i write the sysntax
SQL>ALTER TABLESPACE X BEGIN BACKUP
SQL>HOST COPY c:\...dbf d:\...dbf
SQL>ALTER TABLESPACE X END BACKUP
but my question is that, what is the actual meaning of the
1. ALTER TABLESPACE X BEGIN BACKUP?
2. ALTER TABLESPACE X END BACKUP?
plz tell me as soon as possible. |
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 MOH_DBA |
| Posted: Feb 22, 2008 03:28:25 PM |  |
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Total Post: 155
Joined: Nov, 2007
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BEGIN BACKUP
Specify BEGIN BACKUP to indicate that an open backup is to be performed on the datafiles that make up this tablespace. This clause does not prevent users from accessing the tablespace. You must use this clause before beginning an open backup.
Restrictions on Beginning Tablespace Backup
Beginning tablespace backup is subject to the following restrictions:
You cannot specify this clause for a read-only tablespace or for a temporary locally managed tablespace.
While the backup is in progress, you cannot take the tablespace offline normally, shut down the instance, or begin another backup of the tablespace.
END BACKUP
Specify END BACKUP to indicate that an online backup of the tablespace is complete. Use this clause as soon as possible after completing an online backup. Otherwise, if an instance failure or SHUTDOWN ABORT occurs, then Oracle Database assumes that media recovery (possibly requiring archived redo log) is necessary at the next instance startup.
Restriction on Ending Tablespace Backup
You cannot use this clause on a read-only tablespace
and if you are using oracle 10g on windows use OCOPY utility of oracle rather than the COPY UTILITY of windows
SQL>HOST OCOPY c:\...dbf d:\...dbf
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