What are the requirements for HA in VMware?
What are the requirements for HA in VMware?
Each host in the HA cluster must be able to do DNS resolution of any other host in the cluster. Minimum 2 ESX hosts are required for setting up HA. However, to ensure redundancy and maximum Fault Tolerance protection, you should have a minimum of three hosts in the cluster.
How much storage do I need for VMware?
At least 1GB free disk space recommended for each guest operating system and the application software used with it; if you use a default setup, the actual disk space needs are approximately the same as those for installing and running the guest operating system and applications on a physical computer.
What are the prerequisites of HA and DRS?
VMware HA configuration prerequisites DNS resolution: All ESX/ESXi hosts that are members of the HA cluster must be able to resolve one another using DNS. Access to shared storage: All hosts in the HA cluster must have access and visibility to the same shared storage; otherwise, they would have no access to the VMs.
Does VMware HA require shared storage?
VMware HA Requirements and Best Practices First, for clusters enabled for VMware HA, all virtual machines and their configuration files must reside on shared storage (Fibre Channel SAN, iSCSI SAN, or SAN iSCI NAS), because you need to be able to power on the virtual machine on any host in the cluster.
What is difference between DRS and HA?
VMware HA and DRS are each able to provide availability for VMs. The main difference between the two technologies is that VMware designed DRS to work in clustered environments, while HA enables admins to protect their VMs without having to deal with the cost or complexity of a failover cluster.
What is VMware HA high availability )?
VMware High Availability (HA) allows companies to provide high availability to any application running in a virtual machine. With VMware HA IT organizations can: • Protect applications with no other failover option. Provide cost-effective high availability for any application running in a virtual machine.
What are the requirements for VM storage?
RAM: 16 GB.
What are the minimum required resources to a VM machine?
Hardware
| Hardware | VMM server | VMM library |
|---|---|---|
| Processor (recommended) | 16-core, 2.66 GHz CPU | 4 core 2.8 GHz CPU |
| RAM (minimum) | 4 GB | 2 GB |
| RAM (recommended) | 16 GB | 4 GB |
| Hard drive (minimum) | 4 GB | Based on size/amount of stored files |
Can you identify difference between HA and FT & HA and DRS?
Is ha part of DR?
HA is often a major component of DR, which can also consist of an entirely separate physical infrastructure site with a 1:1 replacement for every critical infrastructure component, or at least as many as required to restore the most essential business functions.
What is difference between HA and DR?
High Availability (HA) provides a failover solution in the event a Control Room service, server, or database fails. Disaster Recovery (DR) provides a recovery solution across a geographically separated distance in the event of a disaster that causes an entire data center to fail.
What is the difference between HA and FT in VMware?
Summary: VMware FT vs VMware HA FT is notable for the absence of downtime, while HA requires time to reboot. In addition, HA works on each cluster, while FT works on each virtual machine.
What do you need for VMware high availability?
VMware High Availability requires at least two physical servers that fulfill the role of ESXi (ESX Integrated) hosts. ESXi is the operating system installed on physical servers joined together into the vSphere Cluster. These servers act as nodes in a primary-primary relationship.
What is the purpose of Vcenter high availability?
vCenter High Availability (vCenter HA) protects vCenter Server against host and hardware failures. The active-passive architecture of the solution can also help you reduce downtime significantly when you patch vCenter Server. After some network configuration, you create a three-node cluster that contains Active, Passive, and Witness nodes.
What are the benefits of high availability in vSphere?
Multiple communication paths—High Availability nodes within a cluster can communicate through the storage subsystem as well as over the management network. Multiple communication paths increase redundancy and enable better assessment of the health of a vSphere host and its virtual machines.
What does VMware HA do for virtual machines?
One of these distributed services, VMware HA, provides easy-to-use, cost-effective high availability for all applications running in virtual machines. In the event of server hardware failure, affected virtual machines are automatically restarted on other physical servers that have spare capacity.