vSphere components use SSL to communicate securely with each other and with ESXi and is also used by vCenter services such as the vSphere Web Client for initial authentication to vCenter Single Sign-On. In vSphere >= 6.0, the VMware Certificate Authority (VMCA) provisions each ESXi host and each vCenter Server service with a certificate that […]
Sources: wikipedia (numa available in many languages) https://pubs.vmware.com/vsphere-60/index.jsp#com.vmware.vsphere.resmgmt.doc/GUID-7E0C6311-5B27-408E-8F51-E4F1FC997283.html ESXi supports memory access optimization for Intel and AMD Opteron processors in server architectures that support NUMA (non-uniform memory access). NUMA architecture developed in multiprocessor system where time to access to a single data by a processor depending on the processor position from memory. In NUMA a […]
Workload balancing is another vSphere feature that using vMotion and sVmotion increase the system efficiency and in some cases could be a cost savings solution. Sources: https://pubs.vmware.com/vsphere-60/index.jsp#com.vmware.vsphere.resmgmt.doc/GUID-98BD5A8A-260A-494F-BAAE-74781F5C4B87.html https://blogs.vmware.com/vsphere/2016/05/load-balancing-vsphere-clusters-with-drs.html (thx to Matthew Meyer) https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1007485 Resource management Resource type are: CPU Memory Power Storage Network Resource providers are: Host Clusters Datastore cluster Resource consumers are VMs. Goals […]
The added value for a server to be virtualized in a vSphere environment is the agility to move itself across physical environment with near zero downtime. vSphere started talking about vMotion and storage vMotion to give back to customer the agility to minimize planned downtime for maintenance. Sources: Official doc: https://pubs.vmware.com/vsphere-60/index.jsp#com.vmware.vsphere.vcenterhost.doc/GUID-FE2B516E-7366-4978-B75C-64BF0AC676EB.html It is possible to […]
All of us know the direct installation via media, which is the most used by many folks during “poor” cluster installation (up to 6 nodes installation). But in this post I would highlight other installation methods, extracting pieces of infos from official docs: https://pubs.vmware.com/vsphere-60/index.jsp#com.vmware.vsphere.install.doc/GUID-D0A72192-ED00-4A5D-970F-E44B1ED586C7.html Scripted installation It’s possible to perform scripted way to install and […]
Backup and restore network configuration vSphere 5.1 and later enables you to backup and restore the configuration of a vSphere Distributed Switch. It’s possible to restore the virtual network configuration in cases of database or upgrade failure or use backup as template to create a copy to the same vSwitch in new vSphere environment. Export […]
I’m writing this post to highlight some advanced vSphere topics during my VCP6 Study. Sources for this post are: vSphere 6 Official Docs (https://pubs.vmware.com/vsphere-60/index.jsp#com.vmware.vsphere.networking.doc/GUID-35B40B0B-0C13-43B2-BC85-18C9C91BE2D4.html) KB 2051826 https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2051826 KB 2034277 https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2034277 Link aggregation and LACP Basics https://www.thomas-krenn.com/en/wiki/Link_Aggregation_and_LACP_basics Networking policies You apply networking policies differently on vSphere Standard Switches and vSphere Distributed Switches: vSphere Standard Network Switch […]
New vSphere version comes with a powerful web user interface, and this blog post could be “outdated”. But a great part of sysadmins, which use C# Client on Windows 10 could meet a strange graphical issue opening VM console: To solve this issue, according with some forum, and personally verified, you must uncheck the […]
What’s Nimble Storage? Storage capacity and IOPS are critical application elements, that combined with compute and networking could lack or meet the application performance. Focusing on overall storage performance it’s true that in addition to many misunderstanding between infrastructure team and application team are the root cause of design mistakes. The new challenge is build […]
Web: https://www.it.paessler.com/ What is PRTG? IMHO yet another monitoring tool but with many tricks. With PRTG you could monitoring everything of your infrastructure is compatible with SNMP standard: from physical, virtual, OS and applications that expose SNMP. Let’s see the key features in this product: Ajax web interface Enterprise console (available for Windows) Mobile and […]
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