Using the copy Flash "alter system suspend '"

Hello friends,

I just had the opportunity to have the IBM/Tivoli to present a new feature called Advanced Copy Services.
This feature offers the possibility to take a copy of 'flash' very fast to a database (hot water), and then copy it to another partition of HDD or on SAN or network server, and then allows us to use RMAN to perform a normal "flashcopied" database copy The time it takes to make a copy of 'flash' is expressed in only a few minutes. In fact, I would like to know precisely how long it takes for a real database about 300 GB.

The whole point of the software is to eliminate the need for long time for backups.

This sounds good, and I'm trying to understand how this can be done.

Apparently, Oracle has a (fairly new) modifies the system suspend and resume command that makes this possible.

Someone at - he used these change orders in the system for this purpose (flashcopy and backups)? Is it really possible to run for this purpose?

I found a few sites with information on this subject and it seems that this can be done as the seller says.
When Oracle offer this new feature? I wasn't aware of this.

NOTE: When I did a few tests, I "suspended" the database, yet I could still select tables, but I could not perform any DDL and DML. Apparently suspends performs a form of locking transaction on all objects in the database.

Thank you.

JI Li

Is your goal to a backup or a copy of the database?

I used flash for both, but the Services of integrated advanced copy the Flashcopy and Tivoli Storage Manager with the Protection of data for instant capture devices. I never wanted to integrate Flash copy with Tivoli, my main goal was a brief overview of the database for backup or duplication. I always once a flash for backup just manually send the Flash files to TSM. If there are a few advanages it to integrate Flash and TSM, I have never done.

I've never used suspends alter system as part of the copy of flash, because it suspends all I/o operations and for copy makes flash a recovery managed on the other end eliminates this need however if your database is large enough with enough file Flash with the suspension systems may not be all that practice because I had a database that took almost 5 minutes to get the flash has started on all of its volumes and the suspension for that length of time I'd be against. However Metro Mirror (PPRC) I think requires suspends, so, according to the technology behind the presences for advanced copy Services may be required esp if the wish is to leave the boundaries of the San to copy/backup however documentation is really taking only about copy flash.

I would like to ask the question how long will be my database must be in a sleep state? As I have indicated that if the database has a large number of volumes that need to be flashed this might take a bit so if you have a busy database that could be a factor to consider.

One thing I wonder is if you need to maintain the drive around because the flash back for quick restoration why not only run a physical standby and run backup from it with PDT it will serve the purpse even unloading the backup to another server, and when you re-instantiate the day before use flash for this not to mention some of the other benefits you get to have physics of the day before.

Then, look carefully the benefits and disadventages of the use of GBA in your environment based on your needs and your requirements.

Just some thoughts

Tags: Database

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