Comments on: Hot Backups, Redo, and Fractured Blocks

By: venkat kona

venkat kona — Tue, 27 Oct 2009 21:40:56 +0000

Steve…Thanks for the great explanation…..

By: Sanjib

Sanjib — Wed, 23 Sep 2009 22:41:56 +0000

Its really greate doc regarding fracture blocks during HOT backups.
I have two doubts ,it would be greate if you will clear my doubts:-

1>How to avoide the fracture blocks in HOT backups ?
2>My database crashes during HOT backup,than how to bringup my database ?

By: Sudhakar

Sudhakar — Sat, 05 Sep 2009 17:38:59 +0000

Thanku for giving for great explanation. I doubt was clear with ur explanation.
I have a doubt why extra redo’s are not genarated while taking backup with RMAN.

By: vijay

vijay — Fri, 10 Jul 2009 19:09:34 +0000

Hi nice to see this neat explantaion about the hotbackup and abt fracured blocks ..I have a question ..can u plz let me know why there is more redo generation during the tablespace/database begin backup mode ?

By: abdus

abdus — Mon, 06 Jul 2009 18:44:56 +0000

Hi
i have one more question it would be a great favour for me if u can answer to this question below
Q.My query was running fine yesterday but now it was taken more time to complete what is the reason ?

By: abdus

abdus — Mon, 06 Jul 2009 18:41:11 +0000

Hi
i thanks for the explanation this doubt was in my mind from past 1 year now it got cleared.Really it was excellect explanation.

By: Hundreds of reasons why you might want(or have) to use R-Man! « H.Tonguç Y?lmaz – Oracle Blog

Thu, 02 Jul 2009 13:11:46 +0000

[...] ? | what is BINARY COMPRTESSION ?| what is UNUSED BLOCK COMPRESSION ? « lutz hartmann as sysdba http://www.oraclealchemist.com/oracle/hot-backups-redo-and-fractured-blocks/ Possibly related posts: (automatically generated)Oracle By Example Series for 10g Release [...]

By: Pattar

Pattar — Wed, 10 Jun 2009 08:26:12 +0000

Steve, very nice explanation. So, doing a hot backup along with OS copy might generate lot of fractured blocks which can increase the recovery time? We use NetApp snapshot by putting the DB in hot backup mode and snapping the files and cataloging them into RMAN including the archives. As the snaps are done within seconds – we use this compared to taking full RMAN backups.

By: Ayan

Ayan — Fri, 05 Dec 2008 22:27:05 +0000

just awesome !!!

By: saraf

saraf — Wed, 12 Nov 2008 22:14:53 +0000

Good explanation.

Hi,

i have some questions related to stanby database.

eg we have two servers Host A and Host B. i have primary database on Host A.Now i dont know how to create a standby database .It is confusing when i go through notes.

Kindly help me i am new to it…..