[ovs-discuss] Fwd: Query with respect to DB commit even when vsctl failed

[RishiRaj Maulick]

Hi All,

In the scenario where the ovsdb has already updated the database , but the
application that has registered for monitoring the schema has failed to
process DB updates ( due to internal errors ) , we have to roll back the
database changes.

Is there a mechanism available in ovsdb-server to roll back to a certain
previous commit point.

I would greatly appreciate any response on this as it would help us in
making right design decisions.

Thanks and regards,
Rishi Raj

---------- Forwarded message ----------
From: RishiRaj Maulick <rishi.raj2509 at gmail.com>
Date: Mon, Sep 21, 2015 at 5:01 PM
Subject: Query with respect to DB commit even when vsctl failed
To: discuss at openvswitch.org, dev at openvswitch.org


Hi ,



I have been using OVS recently and I noticed the following -



1)     I did not insert the openvswitch kernel module

2)     Using “ovs-vsctl add-br br0” command , I tried to add a bridge –
which failed for obvious reasons. There is an error log that is displayed
on ovs-vsctl screen as well.

3) However there are entries that are left in the ovs database –
“ovsdb-client dump”. I can see addition to the bridge , port , interface
and openvswitch tables – all entries pertaining to the bridge “br0”.

Ideally an application has to delete the bridge “br0” from the DB after
hitting an error like this.



I see that the ovs-vsctl can detect these errors through checks for the
field in the interface table entry "ofport”.



The question is how can a remote management interface for any proprietary
schemas get to know about application processing failures .



Thanks and regards,
Rishi Raj Maulick
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