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тАО07-12-2005 01:44 AM
тАО07-12-2005 01:44 AM
Re: Recovery time
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тАО07-12-2005 02:10 PM
тАО07-12-2005 02:10 PM
Re: Recovery time
on this setup:
RP5430 x 2
Oracle 8i + RMAN
100Mbps link
and
Database size 30GB
Archive log file size 25MB
we obtained the following results:
Full RMAN recovery = 2 hours
Archived Log recovery (x1) = 15mins
(NB. on the system where we were recovering, the datafiles are on internal disks whereas the source backup files are on a SAN and recovery done across the 100Mbps network connection to the source server)
hope this helps!
regards
yogeeraj
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тАО07-12-2005 05:59 PM
тАО07-12-2005 05:59 PM
Re: Recovery time
This should be useful we more details to compare on my config.
The thing is that we were supposed to make that test on test rp8400 that just crashed.
So I try to get information on average speeds for that king of recovery besause I can't make that test right now.
To give you more information, my server as 6 CPU 750MHz and 6 GB of memory.
I think we have just one db-writer.
Maybe it would be just more simple to measure I/Os my production can produce...
How can I do that ?
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тАО07-12-2005 08:05 PM
тАО07-12-2005 08:05 PM
Re: Recovery time
maybe glance and measureware can help you here!
regards
yogeeraj
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тАО07-13-2005 03:31 AM
тАО07-13-2005 03:31 AM
Re: Recovery time
I asked nearly the same question here:
http://forums2.itrc.hp.com/service/forums/questionanswer.do?threadId=220331
Meanwhile I think it would be good to have a seperate configuration for recovery:
db_writers = num_cpus - 4
DB-buffers = 80% RAM
do parallel recovery (4)
May be do some tests to balance the CPUs between the parallel recovery processes and the db_writers.
Good luck
Volker
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