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FRANKDENNEMAN.NL
VM Service – Help Developers by Aligning Their Kubernetes Nodes to the Physical Infrastructure. May 3, 2021. The vSphere 7.0 U2a update released on April 27th introduces the new VM service and VM operator. Hidden away in what seems to be a trivial update is a collecti MULTI-GPU AND DISTRIBUTED DEEP LEARNING Parallelism is a common strategy is distributed deep learning. There are two popular methods of parallelizing DL models: model parallelism and data parallelism. Model parallelism. With model parallelism, a single model (Neural Network A) is 60 MINUTES OF NUMA VMWORLD SESSION COMMANDS November 12, 2019 Mark Seymour. Your session was the last one at VMworld 2019 Europe before I flew back to the UK and can I say it was numa.af :-). It was an area of virtualisation that I had not considered in depth, but now I will be paying more attention to it. NODE INTERLEAVING: ENABLE OR DISABLE? There seems to be a lot of confusion about this BIOS setting, I receive lots of questions on whether to enable or disable Node interleaving. I guess the term “enable” make people think it some sort of performance enhancement.Unfortunately the opposite is true and it is strongly recommended to keep the default setting and leave Node Interleaving disabled. RESOURCE POOLS AND SIBLING RIVALRY One of the most powerful constructs in the Software Defined Data Center is the resource pool. The resource pool allows you to abstract and isolate cluster compute resources. Unfortunately, it’s mostly misunderstood and it received a bad rep in the past that it cannot get rid off. One of the challenges of resource pools is NO NETWORK CONNECTION AFTER RE-REGISTERING VCSA USING THE To solve the mac address assignment fast, rename the file 70-persistent-net.rules. After rebooting the VCSA, review the 70-persistent-net.rules file to verify that SUSE assigned the MAC address to eth0. You can now safely customize the system (Press F2 in the console) and configure the management network. A reboot of the VCSA is necessary as it HOW TO SETUP MULTI-NIC VMOTION ON A DISTRIBUTED VSWITCH 1: Select the distributed switch, right click and select “New Distributed Port Group”. 2: Provide a name, call it “vMotion-01” and confirm it’s the correct distributed switch. 3: Keep the defaults at Configure settings and click next. 4: Review the settingsand click finish.
INCREASING THE QUEUE DEPTH? For example an 8 ESX host cluster connects to 15 LUNS (L) presented by an EVA8000 (4 target ports)* An ESX server issues IO through one active path (P), so P=1 and L=15. The execution throttle\queue depth can be set to 136,5=> T=2048 (1 * Q * 15) = 136,5. But using this setting one ESX host can fill the entire target port queue depth byitself
DESIGNING YOUR VMOTION NETWORK January 31, 2013 Ivan Marshall. Hi Frank Great post as ever .. I’ve been wondering about Multi-NIC vMotion and vDS for a while, but I also had a basic NIC design question hanging on my head. YOU DO NOT HAVE PERMISSIONS TO VIEW THIS OBJECT ERROR Frank Denneman is a Chief Technologist in the Office of CTO of the Cloud Platform BU at VMware. He is the author of multiple books including “vSphere 6.5 Host Technical Deep Dive” and the “vSphere Clustering Technical Deep Dive” series.FRANKDENNEMAN.NL
VM Service – Help Developers by Aligning Their Kubernetes Nodes to the Physical Infrastructure. May 3, 2021. The vSphere 7.0 U2a update released on April 27th introduces the new VM service and VM operator. Hidden away in what seems to be a trivial update is a collecti MULTI-GPU AND DISTRIBUTED DEEP LEARNING Parallelism is a common strategy is distributed deep learning. There are two popular methods of parallelizing DL models: model parallelism and data parallelism. Model parallelism. With model parallelism, a single model (Neural Network A) is 60 MINUTES OF NUMA VMWORLD SESSION COMMANDS November 12, 2019 Mark Seymour. Your session was the last one at VMworld 2019 Europe before I flew back to the UK and can I say it was numa.af :-). It was an area of virtualisation that I had not considered in depth, but now I will be paying more attention to it. NODE INTERLEAVING: ENABLE OR DISABLE? There seems to be a lot of confusion about this BIOS setting, I receive lots of questions on whether to enable or disable Node interleaving. I guess the term “enable” make people think it some sort of performance enhancement.Unfortunately the opposite is true and it is strongly recommended to keep the default setting and leave Node Interleaving disabled. RESOURCE POOLS AND SIBLING RIVALRY One of the most powerful constructs in the Software Defined Data Center is the resource pool. The resource pool allows you to abstract and isolate cluster compute resources. Unfortunately, it’s mostly misunderstood and it received a bad rep in the past that it cannot get rid off. One of the challenges of resource pools is NO NETWORK CONNECTION AFTER RE-REGISTERING VCSA USING THE To solve the mac address assignment fast, rename the file 70-persistent-net.rules. After rebooting the VCSA, review the 70-persistent-net.rules file to verify that SUSE assigned the MAC address to eth0. You can now safely customize the system (Press F2 in the console) and configure the management network. A reboot of the VCSA is necessary as it HOW TO SETUP MULTI-NIC VMOTION ON A DISTRIBUTED VSWITCH 1: Select the distributed switch, right click and select “New Distributed Port Group”. 2: Provide a name, call it “vMotion-01” and confirm it’s the correct distributed switch. 3: Keep the defaults at Configure settings and click next. 4: Review the settingsand click finish.
INCREASING THE QUEUE DEPTH? For example an 8 ESX host cluster connects to 15 LUNS (L) presented by an EVA8000 (4 target ports)* An ESX server issues IO through one active path (P), so P=1 and L=15. The execution throttle\queue depth can be set to 136,5=> T=2048 (1 * Q * 15) = 136,5. But using this setting one ESX host can fill the entire target port queue depth byitself
DESIGNING YOUR VMOTION NETWORK January 31, 2013 Ivan Marshall. Hi Frank Great post as ever .. I’ve been wondering about Multi-NIC vMotion and vDS for a while, but I also had a basic NIC design question hanging on my head. YOU DO NOT HAVE PERMISSIONS TO VIEW THIS OBJECT ERROR Frank Denneman is a Chief Technologist in the Office of CTO of the Cloud Platform BU at VMware. He is the author of multiple books including “vSphere 6.5 Host Technical Deep Dive” and the “vSphere Clustering Technical Deep Dive” series. 10 GUIDELINES FOR CREATING GOOD-LOOKING February 6, 2013 Jannie H. Thanks! Good tips, particularly enjoyed the bit on colour. Something I’ve learnt is that it’s almost always a good idea to start with a few rough hand-drawings first, until you’re happy that the general layout brings across your message inthe way you want.
VAAI HW OFFLOAD AND STORAGE VMOTION BETWEEN TWO STORAGE Recently I received a question about migrating virtual machines with Storage vMotion between two Storage Arrays. More specifically if VAAI is leveraged by Storage vMotion in this process. Unfortunately VAAI is an internal array based feature, the Clone Blocks VAAI feature Storage vMotion leverages is only used to copy and migrate data within thesame
HOME LAB FUNDAMENTALS: DNS REVERSE LOOKUP ZONES The Home Lab fundamentals series focusses on these subjects, helping you how to avoid common pitfalls that provide headaches and waste incredible amounts of time. One thing we always keep learning about vSphere is that both time and DNS needs to be correct. DNS resolution is important to many vSphere components. DECOUPLING OF CORES PER SOCKET FROM VIRTUAL NUMA TOPOLOGY Some changes are made in ESXi 6.5 with regards to sizing and configuration of the virtual NUMA topology of a VM. A big step forward in improving performance is the decoupling of Cores per Socket setting from the virtual NUMA topology sizing. Understanding elemental behavior is crucial for building a stable, consistent and properperforming
DESIGNING YOUR VMOTION NETWORKING The “Designing your vMotion network” series have lead me to have some interesting conversations. A recurring question is why not use Link Aggregation technologies such as Etherchannel to increase bandwidth for vMotion operations. When zooming into vMotion load balancing operations and how the vNetwork load balancing operations work, it becomes clear that Multi-NIC vMotion network WHY IS VMOTION USING THE MANAGEMENT NETWORK INSTEAD OF THE If the virtual machine is stored on a local or non-shared datastore vMotion is using the vMotion network to transfer the data to the destination datastore. When monitoring the VMkernel NICs, some traffic can be seen following over the management NIC instead of the VMkernel NIC enabled for vMotion. When migrating a virtual machine, vMotion MANUAL STORAGE VMOTION MIGRATIONS INTO STORAGE DRS A default anti-affinity rule is applied to all new virtual machines in datastore cluster 2, therefore Storage DRS recommends to place Hard disk 2 on nfs-f-07 and Hard disk 3 on datastore nfs-f-01. Test result: Intra-VM anti-affinity rule applied on VM. The files stored in Tier-2 are placed on a single datastore, while the virtual machine diskMULTI-NIC VMOTION
By placing the redundant NICs into standby instead of unused you avoid the risk of having an unstable vMotion network. If a NIC fails, you might experience some vMotion performance degradation as the traffic gets routed through the same NIC, but you can trust your vMotion network to correclty migrate all virtual machines off the host in order for to replace the faulty NIC. REMOVING THE HORIZONTAL BAR IN THE FOOTER OF A WORD DOC To remove the bar: 1. Open the footers section, by clicking in that area in the document. 2. Go to menu option Format. 3. Borders and Shading. 4. The borders and shading menu shows the line that miraculous appeared in my footer, by selecting the option None at the right side of the window it removes the horizontal bar from thefooter.
YOU DO NOT HAVE PERMISSIONS TO VIEW THIS OBJECT ERROR Frank Denneman is a Chief Technologist in the Office of CTO of the Cloud Platform BU at VMware. He is the author of multiple books including “vSphere 6.5 Host Technical Deep Dive” and the “vSphere Clustering Technical Deep Dive” series.* __ Search
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VM SERVICE – HELP DEVELOPERS BY ALIGNING THEIR KUBERNETES NODES TO THE PHYSICAL INFRASTRUCTUREMay 3, 2021
The vSphere 7.0 U2a update released on April 27th introduces the new VM service and VM operator. Hidden away in what seems to be a trivial update is a collecti... Read More... 2749 views11 min read VSPHERE WITH TANZU VCENTER SERVER NETWORK CONFIGURATION OVERVIEWNovember 6, 2020
I noticed quite a few network-related queries about the install of vSphere with Tanzu together with vCenter Server Networks (Distributed Switch and HA-Proxy). ... Read More... 4386 views8 min read WHAT’S YOUR FAVORITE TECH NOVEL?July 30, 2020
Today I was discussing with Duncan some great books to read. Disconnecting fully from work is difficult for me, so typically, the books I read are tech-related... Read More...804 views4 min read
NEW WHITEPAPER AVAILABLE ON VSPHERE 7 DRS LOAD BALANCINGJuly 22, 2020
vSphere 7 contains the new DRS algorithm that differs tremendously from the old one. The performance team has put the new algorithm through the test and have p... Read More... 2144 views0 min read VSPHERE 7 DRS SCALABLE SHARES DEEP DIVEMay 27, 2020
You are one tickbox away from completely overhauling the way you look at resource pools. Yes you can still use them as folders (sigh), but with the newly intro... Read More... 4067 views20 min read VSPHERE 7 VMOTION WITH ATTACHED REMOTE DEVICEMay 12, 2020
A lot of cool new features fly under the radar during a major release announcement. Even the new DRS algorithm didn't get much air time. One thing that I disco... Read More... 3826 views2 min read DRS MIGRATION THRESHOLD IN VSPHERE 7May 8, 2020
DRS in vSphere 7 is equipped with a new algorithm. The old algorithm measured the load of each host in the cluster and tried to keep the difference in workload... Read More... 2154 views8 min read VSPHERE SUPERVISOR NAMESPACEApril 1, 2020
vSphere 7 with Kubernetes enables the vSphere cluster to run and manage containers as native constructs (vSphere Pods). The previous two articles in this serie... Read More... 1008 views19 min read SCHEDULING VSPHERE PODSMarch 20, 2020
The previous article "Initial Placement of a vSphere Pod," covered the internal construction of a vSphere Pod to show that it is a combination of a tailor-made... Read More... 2334 views20 min read DEEP LEARNING TECHNOLOGY STACK OVERVIEW FOR THE VADMIN – PART 1March 12, 2020
Introduction We are amid the AI "gold rush." More organizations are looking to incorporate any form of machine learning (ML) or deep learning in their servi... Read More... 1187 views13 min readLoad More
ABOUT THE AUTHOR
Frank Denneman is a Chief Technologist in the Office of CTO of the Cloud Platform BU at VMware. He is the author of multiple books including “vSphere 6.5 Host Technical Deep Dive” and the “vSphere Clustering Technical Deep Dive” series.UPCOMING EVENTS
06-May-21 | VMUG Iceland- Roadshow 19-May-21 | VMUG Saudi – Roadshow 26-May-21 | VMUG Egypt – Roadshow 27-May-21 | VMUG Australia – RoadshowRECOMMENDED READS
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