"You MUST restore the last full backup and all incremental backups taken after
the last full. It is much simpler to restore only the last full backup and
apply the logs."
Why is it simpler? You just issue recover database and rman takes care of the
rest. it is not like you must manually figure out which incremental backups
and archive logs you need to apply.
While I would prefer running level 0 backups daily where possible and may or
may not use level 1 backups with them the only real cost of level 1 backups is
the extra file space consumed by the level 1 backup that would not be consumed
if you only ran archive logs backups to go along with your level 0 or full. On
systems with high update to the same rows use of level 1 backups can save a log
of recovery time and time to recover is important.
Mark Powell
Database Administration
(313) 592-5148
________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx <oracle-l-bounce@xxxxxxxxxxxxx> on behalf
of Mladen Gogala <gogala.mladen@xxxxxxxxx>
Sent: Thursday, May 13, 2021 11:01 AM
To: Jared Still <jkstill@xxxxxxxxx>
Cc: Oracle-L Freelists <oracle-l@xxxxxxxxxxxxx>
Subject: Re: Backup on standby database
Well, it is not possible to recover DB from an incremental backup alone. You
MUST restore the last full backup and all incremental backups taken after the
last full. It is much simpler to restore only the last full backup and apply
the logs. That is possible if you have daily full backups w/o any incremental
backups. The problem with such strategy is storage, not the duration of the
full backup which takes longer than the incremental. That doesn't matter since
the standby is not open and is not doing anything for the end users. Nobody
will suffer because you're running backup from standby. The storage problem can
be resolved by deduplication. If the OP's backup software supports
deduplication, and pretty much every backup suite does support it, his
subsequent full backups will take as much space as an incremental.
On 5/13/21 10:01 AM, Jared Still wrote:
Hi Mladen,
Please explain:
Also, if you plan on running incremental backups, which I don't consider a good
idea,
Jared Still
Certifiable Oracle DBA and Part Time Perl Evangelist
Principal Consultant at Pythian
Oracle ACE Alumni
Pythian Blog
http://www.pythian.com/blog/author/still/<https://clicktime.symantec.com/a/1/mJVSISzEHH_JAKz4tadrbRlYlYaxeNAK2II35gDcTY8=?d=hLvgTrsk498zgqlutYWbrJKoENsE3eej5Vig62q94j0BZZlIBO_Yv1wM18JrdYtAcOouO6FH1gJrR8CtfGdV-FTfSpUzhC1jktpFxVfDUFDTe0w3-jWFl8rrmDXfFeBSqOy-SWgIt6Ldh4A6e-LM21aRfC2IEhAdR6e_mcmhVRvbtZVkGOCX2lCIemFLfDLzolwBiLi2jJ45vruLkGuh9j30Z3QlgZmCJU-E758oVP4qVAso9MAVW-au9bywxEkdzslpbOneuMflAsGAVFDrNzpmkbx1RCEkfAyNDPD2lUJKRsEUAQaY241Mo69DZS-05Qt4YWFjE4SmAqD_9M5NA908wX9qTXy8_CCaZkUcp1rL5g9syMU6G9eM3r88iX4G9l0_BsLCz6r77YAJrlNEmQ8fmzL95XHPic5upOGaxWQf_m-KKH-TFAhzbVJdpQgc_8Z_&u=http%3A%2F%2Fwww.pythian.com%2Fblog%2Fauthor%2Fstill%2F>
Github:
https://github.com/jkstill<https://clicktime.symantec.com/a/1/xVPUmQWc5I54MyvyOLlGVR4xucrp39n40JumOJDHzhI=?d=hLvgTrsk498zgqlutYWbrJKoENsE3eej5Vig62q94j0BZZlIBO_Yv1wM18JrdYtAcOouO6FH1gJrR8CtfGdV-FTfSpUzhC1jktpFxVfDUFDTe0w3-jWFl8rrmDXfFeBSqOy-SWgIt6Ldh4A6e-LM21aRfC2IEhAdR6e_mcmhVRvbtZVkGOCX2lCIemFLfDLzolwBiLi2jJ45vruLkGuh9j30Z3QlgZmCJU-E758oVP4qVAso9MAVW-au9bywxEkdzslpbOneuMflAsGAVFDrNzpmkbx1RCEkfAyNDPD2lUJKRsEUAQaY241Mo69DZS-05Qt4YWFjE4SmAqD_9M5NA908wX9qTXy8_CCaZkUcp1rL5g9syMU6G9eM3r88iX4G9l0_BsLCz6r77YAJrlNEmQ8fmzL95XHPic5upOGaxWQf_m-KKH-TFAhzbVJdpQgc_8Z_&u=https%3A%2F%2Fgithub.com%2Fjkstill>
--
Mladen Gogala
Database Consultant
Tel: (347) 321-1217
https://dbwhisperer.wordpress.com<https://clicktime.symantec.com/a/1/z3OB4l0tHKYEqyX9dB5pwAtjADgiQgdf1usx1snB77o=?d=hLvgTrsk498zgqlutYWbrJKoENsE3eej5Vig62q94j0BZZlIBO_Yv1wM18JrdYtAcOouO6FH1gJrR8CtfGdV-FTfSpUzhC1jktpFxVfDUFDTe0w3-jWFl8rrmDXfFeBSqOy-SWgIt6Ldh4A6e-LM21aRfC2IEhAdR6e_mcmhVRvbtZVkGOCX2lCIemFLfDLzolwBiLi2jJ45vruLkGuh9j30Z3QlgZmCJU-E758oVP4qVAso9MAVW-au9bywxEkdzslpbOneuMflAsGAVFDrNzpmkbx1RCEkfAyNDPD2lUJKRsEUAQaY241Mo69DZS-05Qt4YWFjE4SmAqD_9M5NA908wX9qTXy8_CCaZkUcp1rL5g9syMU6G9eM3r88iX4G9l0_BsLCz6r77YAJrlNEmQ8fmzL95XHPic5upOGaxWQf_m-KKH-TFAhzbVJdpQgc_8Z_&u=https%3A%2F%2Fdbwhisperer.wordpress.com>
