[ovs-dev] [PATCH v2] ovsdb-tool: Convert clustered db to standalone db.
aginwala at asu.edu
Fri Aug 23 18:15:16 UTC 2019
Thanks Ben for review!
On Fri, Aug 23, 2019 at 10:42 AM Ben Pfaff <blp at ovn.org> wrote:
> 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.
Yup sure. Actually, for testing I use leader's db to avoid major drift. But
overall agree as its little risky but can help in
in crisis like situation if cluster is down and we want to revert to
standalone mode. Will update document likewise
as per your suggestion,
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