Re: [ovsdb-dev] OVSDB scale
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Sela, Guy <guy.sela@...>
Hi guys,
So a couple of questions:
1) Did you reached Full GC? And if so, did the OVSs disconnected? And did everything continued working smoothly afterwards? 2) Do you have some script or mechanism you can share that will allow to quickly count number of flows in the data store?
From: Vishal Thapar [mailto:vishal.thapar@...]
Sent: Tuesday, January 17, 2017 11:07 AM To: Muthukumaran K <muthukumaran.k@...>; Sela, Guy <guy.sela@...>; Anil Vishnoi <vishnoianil@...>; Jamo Luhrsen <jluhrsen@...> Cc: Pearl, Tomer <tomer.pearl@...>; marcus.g.williams@...; openflowjava-dev@...; ovsdb-dev@... Subject: RE: [openflowjava-dev] [ovsdb-dev] OVSDB scale
Hi Muthu,
Yeah, we had used similar heap and GC settings when testing ITM which added OVSDB and all the netvirt models to the mix, I couldn’t recall what exactly were those.
Regards, Vishal.
From: Muthukumaran K
Hi Vishal,
We had focused mainly on baseline feature of OFPlugin so some of our changes specific to that drive-test may not be applicable for Guy’s case. However, increasing the Heap and using G1GC is something he had already accounted.
For the scenario we were chasing (only openflowplugin + a load-driver app – bulk-o-matic), we had used the settings mentioned in the last reply of this bug https://bugs.opendaylight.org/show_bug.cgi?id=4823
There are few more tweaks in Openflowplugin – but they are all related to specifics of OFPlugin (Helium)
Regards Muthu
From: Vishal Thapar
Adding Muthu.
Muthu, I believe we did have to do some tweaks with heapsize, GC settings etc.right? Do you recall?
Regards, Vishal.
From: Sela, Guy [mailto:guy.sela@...]
Thanks,
Did you manage to survive Full GCs at all ? If I don’t avoid it, a Full GC causes all OVSs to disconnect from the ODL, and it results in a bit of chaos. Is there any way around this other than avoiding Full GC? I managed to avoid it in my testing using 16G heap size and G1 collector.
From: Vishal Thapar [mailto:vishal.thapar@...]
We tested not just OVSDB but OVSDB+Netvirt/VPNService at scale of about 80 OVS at the time with a full mesh. Scale limits come more from size of datastore than anything else. So how many devices you can scale depends on extent of features you’re testing. Is it just OVSDB, or Netvit with multiple VMs per compute across multiple networks?
If you’re running into memory issues would be good to increase memory and capture memory usage. While provisioning you may hit a high peak but will come down once it is done. I’ll check if I can get details of numbers we tested, should be lying somewhere in archived mails.
Regards, Vishal.
From: Anil Vishnoi [mailto:vishnoianil@...]
I believe team from Ericsson also did some testing with it and we made some more performance improvement on boron.
@vishal : do you have any number from your ovsdb testing ?
On Tue, Jan 3, 2017 at 10:05 PM, Jamo Luhrsen <jluhrsen@...> wrote:
-- Thanks Anil |