[ovs-dev] [PATCH v2] ovsdb-tool: Convert clustered db to standalone db.

Ben Pfaff blp at ovn.org
Fri Aug 23 17:40:33 UTC 2019

On Thu, Aug 22, 2019 at 05:53:10PM -0700, amginwal at gmail.com wrote:
> From: Aliasgar Ginwala <aginwala at ebay.com>
> Add support in ovsdb-tool for migrating clustered dbs to standalone dbs.
> E.g. usage to migrate nb/sb db to standalone db from raft:
> ovsdb-tool migrate-cluster-db ovnnb_db.db ovnnb_db_cluster.db
> Signed-off-by: Aliasgar Ginwala <aginwala at ebay.com>

In addition to Han's comments, I suggest updating the documentation,
both for ovsdb-tool itself and Documentation/ref/ovsdb.7.rst.  This kind
of tool can't be sure to get an up-to-date snapshot of the database,
since it only looks at one member of the raft cluster and therefore
can't be sure about the current consensus, so it's more risky to use it
than an online operation like "ovsdb-client backup".  That's probably OK
in some circumstances (notably, if the cluster is already down and can't
be easily revived), but I think that the documentation should be clear
that there is a trade-off.

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