cutting dating expenses - Rsync not updating

It doesn't matter if you use the --inplace option or not on the first hot run, either way you probably will not get a consistent copy of the database.However, on any subsequent cold run (when the database is shut down) --inplace can significantly reduce the amount of data written on the pre-production host.

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Both server's rsync programs need to support the in-place option for this to work, otherwise it will give you an error.

I usually kick off a large rysnc job on a hot database, and run one or even a few catch-up jobs on a cold database before the final switch in any large-scale data migration.

What that means is you can run rsync on a running database, but you will not get a consistent Oracle DBF file on your pre-production host during a hot run.

Set up a rsync daemon If you are cloning a database or migrating a complex ERP system, the fastest way to do that is export a root share for your destination host, by defining it in

I typically set up a temporary read-only rsync daemon on the production host.

The reasoning for that is the host you run the client from will consume more memory as it indexes the list of files to transfer.

Therefore rsync should have less impact by running the job from a pre-production host, while the daemon runs on your production server.

Anyway, the configuration files for the temporary rsync daemon on your production system should look something like this.

The rsync url components are user (root), followed by an @, hostname (prod-server), followed by a separator (::), followed by the share name (root), followed by the source directory with, or without an optional trailing-slash.

Once the rsync job has finished on the pre-production server, you can run the following to kill off the daemon, and remove your temporary iptables rule.

I strongly advise you to RTFM on this one, it comes with several warnings.

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