Hi Ankush: You can check doc [1] , select 'All-in-one (lowlatency) Controller' for lowlatency , this is same all release r3 , r4 changes, if you want to use Simplex or Duplex system . For multi Nodes setup , only worker nodes support low-latency. There is no pre-requirement for a node to be a low-latency node . I this there is no way to change node to low-latency node after installation except re-install. [1] https://docs.starlingx.io/deploy_install_guides/r3_release/bare_metal/aio_du... Thanks. BR Austin Sun. From: Rai, Ankush <Ankush.Rai@commscope.com> Sent: Thursday, September 24, 2020 11:42 AM To: Penney, Don <Don.Penney@windriver.com>; starlingx-discuss@lists.starlingx.io Subject: Re: [Starlingx-discuss] how to get rt-kernel support ? Thank you for your response to this query. But I am still not clear on this. Are you saying that, the kernel-rt RPM will get installed only for "lowlatency" nodes? If my understanding is correct then I have few more questions: * How can I set the node as "lowlatency" node? (Is there any documentation reference for this ?) * Can I make the controller node as a low low-latency node or is it possible for only worker nodes ? * What are the pre-requirement for a node to be a low-latency node ? * Post installation, is there a way to make a node as low-latency node ? I have All-in-one-Duplex mode of deployment, both having "controller" personality and "controller,worker" as subfunctions. capabilities | {u'stor_function': u'monitor', u'Personality': u'Controller-Active'} capabilities | {u'stor_function': u'monitor', u'Personality': u'Controller-Standby'} personality | controller subfunctions | controller,worker Regards, Ankush From: Penney, Don <Don.Penney@windriver.com<mailto:Don.Penney@windriver.com>> Sent: Thursday, September 24, 2020 12:51 AM To: Rai, Ankush <Ankush.Rai@commscope.com<mailto:Ankush.Rai@commscope.com>>; starlingx-discuss@lists.starlingx.io<mailto:starlingx-discuss@lists.starlingx.io> Subject: RE: how to get rt-kernel support ? The kernel-rt RPM is installed on the "lowlatency" nodes. For AIO, you'd want to install AIO-lowlatency. From: Rai, Ankush <Ankush.Rai@commscope.com<mailto:Ankush.Rai@commscope.com>> Sent: Wednesday, September 23, 2020 3:05 PM To: starlingx-discuss@lists.starlingx.io<mailto:starlingx-discuss@lists.starlingx.io> Subject: [Starlingx-discuss] how to get rt-kernel support ? Hi, I couldn't find the rpm for rt-kernel. Is starlingx comes up with rt-kernel support or it need to be patched ? Any pointer to get the rt-kernel support ? software_version | 20.06 I am using the latest green image: http://mirror.starlingx.cengn.ca/mirror/starlingx/master/centos/latest_green_build/outputs/iso/bootimage.iso<http://secure-web.cisco.com/1XaBjIrnsla4yw1swS70D-c4YZi3Gwk3fVlMFfZ8kh2jZoeRyWzfjNtCFudYq_klY9V9Ich822XL2RhcKfuhEage23YzuYyRTEpvehrwknKUOg5mbD5Ci5S6rRANn9WYVS0S7I0kOJD1ErxSKWnPtDeLaYwfxmosv_umFY7x1CgyjeHfO-ENsQk8bUV-_BYXS6cPUqwoeS3XGYVpYtFugRR12uacP1I3x8eX9b2TfrhKVzL9H01z0Y_2V3WGHIqzJtD_WmfTzssYX1NFL4EP4vXW3o3cZDjXxMkH_HLxFz-JXWauMnPwANk4bpGe92t1q/http%3A%2F%2Fmirror.starlingx.cengn.ca%2Fmirror%2Fstarlingx%2Fmaster%2Fcentos%2Flatest_green_build%2Foutputs%2Fiso%2Fbootimage.iso> Required rt-kernel patch: kernel-rt-3.10.0-693.2.2.rt56.623.el7.x86_64 Thanks, Ankush