Virtual Distributed Switch called as vDS is a feature of Enterprise Plus package of the Vsphere Suite. It is managed by vcenter server. It is used for standard settings across all the hosts in a cluster. Even if the VM is moved the port settings and all the configurations are moved with the VM. There are two copies of the configuration
One copy is stored in the vcenter sql database and a local copy is stored in the /etc/vmware/dvsdata.db on the local esxi host. The cached copy is updated every five mins.
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August 6, 2012
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Understanding The Concept of Vmware Virutal Distributed Switch (vDS)
By Akash Deep Singh
August 6, 2012
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Configure vNetwork Standard Switches – Objective 2.1 -VCP5 Notes
By Akash Deep SinghI have written a very brief article on introduction to vsphere vnetworking which was really a very small primer read from the SCOTT LOWE’s Mastering Vmware Vsphere 5 book. The book is really awesome and gives you real insight into VSphere.
August 5, 2012
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Enable / size / disable memory compression cache
By Akash Deep SinghVmware has developed some of the best memory handling techniques. It allows to overcommit memories to certain extent but still run the virtual machines with no problem. The techniques used by VMware by are
Transparent Page Sharing
Balloning
Swapping and
Memory Compression
August 4, 2012
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Enable Configure or Disable Hyperthreading on Vsphere ESXi Hosts
By Akash Deep SinghHyper-threading is a neat feature in the latest INTEL NEHALEM series. It allows each physical core to run 2 threads simultaneously which means 4 physical cores and 8 logical cores. Having double the logical processors does not boost the performance by 100% but it just makes processors more efficient and in some cases help to achieve a gain of 20%. But it still plays a great role when deployed in Vsphere Virtual Infrastructure.
August 4, 2012
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Configure DNS and Routing On An ESXi Host – VCP5 NOTES
By Akash Deep SinghApart from the virtualization of the machines another important thing in the virtual infrastructure is the networking. Proper DNS and routing is required for proper connectivity between hosts, Vcenter and other equipments.
August 4, 2012
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Troubleshooting NTP configuration and errors on an ESXi host
By Akash Deep SinghIn my previous article Configure NTP on an ESXi Host I explained you how you can configure your ESXi host to synchronize clock from NTP servers but it can never be easy things do break problems do occur. IT industry is not like roaming in wonderland hence it becomes more important to troubleshoot thing rather than to configure things.
August 4, 2012
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VCP5 – NOTES Configure NTP on an ESXi Host
By Akash Deep SinghTime syncing is very important when it comes to production environment. All the devices must be synced to NTP or a time server so in case of anomalies, breakdowns or crashes or any other problem the logs can be compared.