On 27 Jun 2018, at 17:11, Ben Pfaff wrote:
On Wed, Jun 27, 2018 at 05:02:31PM +0200, Eelco Chaudron wrote:
On 27 Jun 2018, at 16:09, Ben Pfaff wrote:
On Wed, Jun 27, 2018 at 01:24:25PM +0200, Eelco Chaudron wrote:
In field deployments of OVS (mostly in combination with OpenStack)
we
see that the 2K default MAC forwarding table is too small.
On average this tables is around 5k entries, hence this patch to
increase the default value to the next power of 2, i.e. 8K.
This increase in size does not automatically increase the memory
footprint, as the memory for the MAC entries, are allocated only
when
needed.
Signed-off-by: Eelco Chaudron <[email protected]>
Applied, thanks!
Ben thanks for applying so quickly, however, I seem to have messed up
the
number :(
5K, was 50K (I counted zero’s wrong), which leads to 64K entries by
default.
This might make other people more opposed to the change, as it could
result
in a lot of memory being eaten when someone does a MAC sweep
(attack),
around 4Mbyte per bridge.
Any input here?
64k does seem like a lot.
Maybe OpenStack deployments should just set the configuration value in
the database to whatever they really need?
Yes now seeing the 50K requirement it would be better to do it at the
OSP level. Sorry for the work, I guess you can rollback the patch.
Thanks,
Eelco
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