If network between your source and destination is an issue then you should
consider doing a targetless backup based duplicate from backup destination.
This would eliminate all network transfers during the duplicate.
To achieve this:
Take a backup of the source
Transfer the backup to your destination
Perform a targetless duplicate from the backup location
There are many examples on the oracle support portal and google for this.
Cheers,
Leng
On 12 Jan 2019, at 12:53 am, Noveljic Nenad <nenad.noveljic@xxxxxxxxxxxx>--
wrote:
Increasing the OS TCP timeout and/or retries setting might help as it would
raise the tolerance towards network issues.
By the way, you can use the simple script described in
https://nenadnoveljic.com/blog/testing-network-connectivity/ to get an idea ;
about the TCP latency over time. Basically, the script measures the time
needed to open and close the TCP socket.
But I strongly recommend to invest a little bit more time in understanding
the "network problem". I deliberately used quotes, because what looks like a
network problem might easily be a consequence of, for example, CPU starvation
or an OS bug.
Nenad
https://nenadnoveljic.com/blog
-----Original Message-----
From: grzegorzof@xxxxxxxxxx <grzegorzof@xxxxxxxxxx>
Sent: Freitag, 11. Januar 2019 13:58
To: Noveljic Nenad <nenad.noveljic@xxxxxxxxxxxx>
Cc: oracle-l@xxxxxxxxxxxxx
Subject: RE: resume duplication from active for standby after network issue
It usually ends like this :
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00601: fatal error in recovery manager
RMAN-03004: fatal error during execution of command
ORA-12170: TNS:Connect timeout occurred
ORACLE error from target database:
ORA-03113: end-of-file on communication channel
G
Depending on what "unstable network" is, increasing the OS TCP timeout____________________________________________________
and/or retries setting might be considered as a workaround.
Nenad Noveljic
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