Friday, March 23, 2012

logshipping question

Hi Guys,
i am planning to implement logshipping in sql 2000 which
is already a pulisher for transactional replication.
i am planning to take transaction log backup in the
interval of 1(one) minute.
if network connection broken will it affect restoring at
desination server?
can i make the share for transaction log backup folder on
network instead of production server?
overall will it have any negative impacton source server.
Pls advice
Thanks
Biju
1. Don't try to do log shipping at an interval less than 2 minutes. It can
be done, but you are going to have an extremely difficult time handling all
of the error messages that will pop up due to latency and congestion.
2. You can use a network share if you choose to. The only impact is that
there will be a slightly longer delay as your backups transit across your
network card instead of to the local disk. The negative impact is that your
backups are streaming down your network card which impacts network
throughput. But, that impact is similar to what happens if you back up to
local disk and then copy the backup over, so that consideration is
essentially a wash.
3. Watch you full backups carefully. They will block the transaction log
backups which can cause all of your alarms to go off.
Mike
Principal Mentor
Solid Quality Learning
"More than just Training"
SQL Server MVP
http://www.solidqualitylearning.com
http://www.mssqlserver.com
|||A one minute transaction log backup is VERY ambitious. Most people go for between 5 and 15 minutes. If you test lab this with production-like equipment you will understand why 1-min intervals is so difficult to achieve on SQL2K.
If the network connection is broken, the transaction log copy job will retry the copy the next time it is scheduled to run. No data will be lost. It will keep retrying until the logs are successfully copied or the out-of-synch time is reached.
With an interval of 1-min performance could be a real concern.

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