In a vSphere environment where vDS is being used for networking connectivity, there are several options available for what should be the type of port binding that is to be used for a portgroup. Have you ever wondered which Port Binding setting is most
In this post we will discuss about what is NIOC and why we need it. We will also configure NIOC in lab.
What is Network IO Control (NIOC)?
Network I/O Control (NIOC) was first introduced with vSphere 4.1 and it
What is NIC Teaming and why you need it?
Uplinks is what provides conenctivity between a vSwitch and a physical switch. This uplinks passes all the traffic generated by virtual machines or the vmkernel adapters.
But what happens when that
In physical networking space, switches are connected to one or more adjacent switch forming a web of switches which can talk to each other. This web of switches is referred as “neighbourhood of switching”.
Virtual switches (standard or vDS) are connected
During my VCAP6-Deploy exam preparation, I found this topic quiet a bit interesting and difficult as well as I have never ever laid my hands on Quality of Service type of thinks in respect of networking. Also my concepts were not very
While working through VCAP6-Deploy blueprint I stumbled upon topic TCP/IP stack configuration. I have seen this many times in my lab while configuring networking stuffs and had a basic idea of what is the purpose of using custom TCP/IP stack. Suprisingly this
vSphere storage profiles were first introduced with vSphere 5, then renamed to storage
policies with the release of vSphere 5.5.
There is a a very cool feature available in vSphere 6 which allows you to tag (mark) a devise as SSD/Flash device. Some time ESXi host do not recognize certain devices as
This will be a very short post on how to export vDS configuration from one vCenter and importing it in another vCenter. Lets get started.
What is Multipathing?
Multipathing is having more than one path to storage devices from your server. At a given time more than one paths are
In a shared storage environment, when multiple hosts access the same VMFS datastore, specific locking mechanisms are used. These locking mechanism prevent multiple hosts from concurrently writing to the metadata and ensure that no
What is Datastore Cluster?
A datastore cluster is a collection of datastores with shared resources and a shared management interface. Datastore clusters are to datastores
What is vSphere Flash Read Cache aka vFlash?
Flash Read Cache helps in accelerating virtual machine performance through the use of flash devices residing in
My first interaction with iSCSI and port binding was back in 2013 when we introduced an iSCSI based SAN (Dell MD3200i) in our environment. We were a small SMB entity and introduction of SAN
When you create a new datastore in vSphere, each VMFS volume is assigned a unique identifier (UUID) and this UUID info is stored in a metadata file as unique hexadecimal number.
Raw Device Mapping aka RDM is a way for providing virtual machine direct access to LUN on the SAN storage. The LUN presented to VM can be then formatted with any filesystem like NTFS
VMware vSphere hot add is a feature that allows vSphere administrators to increase the RAM and CPU capacity of a running virtual machine on the fly. This feature is one of my favourites (second
When a virtual machine is created, there are number of files that are created alongwith. The most important among them is the .vmx file which is the configuration file of the VM. Whatever settings
In this post we will discuss about the different type of scsi controllers that are available with VMware vSphere and when to use which type of controller. We will discuss following topics in this
VUM Orchestrated upgrades allow you to upgrade the objects in your vSphere inventory in a two-step process: host upgrades followed by virtual machine upgrades. If you want the upgrade process to be fully automated,
In last post we learn how to configure UMDS and how to enable VUM to use shared repository for downloading patches. If you are new to VUM/UMDS and by mistake landed directly on this
Last year I wrote a post on how to install and configure VUM and UMDS, but never got chance to connect UMDS to VUM and ended up downloading patches directly on VUM server via
Yesterday while reading about Enhanced linked mode I stumbled across this blogpost by William Lam where he have demonstrated how to split vCenters which are configured in linked mode.
Linked Mode was first intoducedd in vSphere 4.x and it has come a long way with vSphere 6.0.
Enhanced linked mode (ELM) allows administrators to
Prior to vSphere 6.0 U1 it was only possible to repoint vCenter Server which was deployed with external PSC to another PSC in same SSO domain. With vSphere 6.0U1, you can now reconfigure embedded