VMware vMotion allows live migrating of virtual machines (VMs) from one host to another without downtime. It was a revolutionary technology back in its day. This post gives tips on how to improve the speed of VMware vMotion.
One of the lesser known built-in products in VMware vSphere is the vSphere Update Manager (VUM). In this post, we'll be targeting only vCenter Server running as a virtual appliance (VCSA) and not on Windows.
Previous releases of VMware vCenter server appliance (VCSA) did not allow us to change a fully qualified domain name (FQDN) or, as VMware calls it, the PNID (Primary Network ID). No, you had to redeploy a new appliance, which was a drawback.
Before we share some information about Storage DRS (distributed resource scheduler), I think it is a good idea to discuss what Storage DRS (SDRS) is. SDRS is a vCenter Server feature that allows intelligent and efficient management of Virtual Machine File System (VMFS) and Network File System (NFS) storage.
This post describes storage controllers used with a VMware vSphere environment. A default storage controller is used when creating a new virtual machine (VM). The controller type depends on the guest operating system, the device type, and sometimes, the virtual machine's compatibility.
When it comes to security in VMware environments, one must think about several aspects. As it is a virtual infrastructure more flexible than a dedicated bare-metal structure, it has more things you need to look after.
Nowhere in this post, it is mentioned. It is certainly not. Via DRS you are able to balance your clustered CPU resources across...
vCenter Server system monitors distribution and usage of CPU and memory resources for all hosts and VMs in the cluster. DRS compares these metrics to an ideal resource utilization given the attributes of the cluster’s resource pools and virtual machines, the current demand, and the imbalance target. DRS then performs (or recommends) VM migrations.
Quote from VMware:
"Automated Load Balancing
DRS spreads the virtual machine workloads across vSphere hosts inside a cluster and monitors available resources for you. Based on your automation level, DRS will migrate (VMware vSphere vMotion) virtual machines to other hosts within the cluster to maximize performance."
VMware vSphere allows you to configure changes in VM hardware on the fly for some components. This is called VM Hot Add, or Hot Plug. In this post, we'll detail the various possibilities and requirements.
In this post, we'll focus on a simple option that allows us to "pin" a VM to a specific host. In fact, a VM Overrides option will ensure that DRS won't move this VM around and that vSphere High Availability (HA) can still restart if there is a problem with the underlying host.
Most backup vendors support backing up VMs with VM hardware 7 (vmx-7) when introduction of CBT (changed block tracking).
Remember, virtual machine compatibility setting determines the virtual hardware available to the virtual machine, which corresponds to the physical hardware available on the host. Consider older hosts which can't be upgraded because old host hardware, you've got another reason not to.
VMware Distributed Resource Scheduler (DRS) is a system that allows you to automatically balance your virtual machines (VMs) within a VMware vSphere cluster environment. In this post, we'll review some VMware DRS tips and tricks for planning, configuring, and using vSphere DRS.