What is ESXi and vSphere? To recap, vSphere is a product suite. ESXi is a hypervisor installed on the physical machine. vCenter Server is a management platform for VMs. When you are working on a small virtualization environment, the vSphere client will be sufficient enough to maintain and manage virtual machines hosted on a few ESXi servers.
What is VMotion in VMware? VMware® VMotion™ enables the live migration of running virtual machines from one physical server to another with zero downtime, continuous service availability, and complete transaction integrity. VMotion is a key enabling technology for creating the dynamic, automated, and self- optimizing data center. benefits.
Can I use ESXi without vSphere? Yes it is possible to directly manage the ESXi host via vsphere client, but you will not be able to get the unique and good features of vCenter server like HA and DRS. So which means if your host goes down, your runnning VM’s will not have a fail over host.
What is cluster in VMware? A cluster is a group of hosts. When a host is added to a cluster, the host’s resources become part of the cluster’s resources. The cluster manages the resources of all hosts within it. Clusters enable the vSphere High Availability (HA) and vSphere Distributed Resource Scheduler (DRS) solutions.
What is ESXi and vSphere? – Additional Questions
What is a ESXi cluster?
A vSphere cluster is a set of ESXi hosts configured to share resources such as processor, memory, network and storage. In vSphere environments, each cluster can accommodate a maximum of 32 ESXi hosts, with each host supporting up to 1024 VMs.
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 the difference between vMotion and DRS?
DRS automatically determines which virtual machines would benefit from a move to another host and live migrates the VM onto the new host using vMotion. In this way, DRS ensures each virtual machine in the cluster gets the host resources—like memory and CPU—that it needs.
Will vMotion work without vCenter?
vMotion & Storage vMotion:
vMotion & Storage vMotion are features of vCenter Server which provides migration functionality to virtual machine & it’s storage. So if vCenter Server is not available you will not be able to do any vMotion or Storage vMotion.
What are two types of vMotion migrations?
There are two types of vMotion, host and storage. Host vMotion is the live migration of the OS, and network transactions, from one hypervisor to another. Storage vMotion is the live migration of a running virtual machine’s file system from one storage system to another. Both types of vMotion are supported by Guardium.
What is FT and HA?
About VMware High Availability(HA) and Fault Tolerance(FT)
VMware has many configurations to provide more efficient virtual machines, including High Availability (HA) and Fault Tolerance (FT). Here are the most important aspects of these configurations. Neither HA nor FT will provide foolproof security.
What is the difference between HA and failover?
Failover is a means of achieving high availability (HA). Think of HA as a feature and failover as one possible implementation of that feature. Failover is not always the only consideration when achieving HA.
What is difference between HA and VMotion?
HA will boot another copy of the vm up on a different host if your host goes down. VMotion is the method used to shift a live copy of a vm from host to host. If you do a migration, it can migrate without downtime with vMotion from Host A to Host B.
What is failover time?
Failover is a backup operational mode in which the functions of a system component are assumed by a secondary component when the primary component becomes unavailable — either through failure or scheduled down time. Failover is an integral part of mission-critical systems.
What is the difference between switchover and failover?
Answer: In general, a failover is a production emergency, where the primary database has failed and you need to failover to the standby database. Conversely, a switchover is a planned switch from a standby back to the primary database, a non-emergency operation.
What is the difference between failover and fallback?
The failover operation switches production from a primary site to a backup (recovery) site. A failback returns production to the original (or new) primary location after a disaster (or a scheduled event) is resolved.
What is the difference between failover and redundancy?
Redundant : using two computers when one would be sufficient. The redundant server is there in case the other computer fails. Failover : the automatic transfer of workload from a failed computer to another computer.
What is difference between HA and cluster?
GitHub Enterprise Server High Availability Configuration (HA) is a primary/secondary failover configuration that provides redundancy while Clustering provides redundancy and scalability by distributing read and write load across multiple nodes.
What is failover and load balancing?
Failover and load balancing are vital for Oracle Access Manager availability and performance. Load balancing distributes request processing across multiple servers. Failover redirects requests to alternate servers if the originally requested server is unavailable or too slow.
What is firewall cluster?
Clustering uses ping, which is type ICMP, and also uses UDP and TCP. When you configure a firewall, you can filter traffic based on the type. For clustering to work the firewall needs to allow traffic of ICMP, UDP and TCP. Outbound traffic can be sent on any port and inbound traffic is received on ports 5550 and 5551.
What is a 3 node cluster?
Basic 3-nodes Cluster Configuration
This example describes a Cluster with three nodes where each node has a direct connection to a database. Figure 215. Configuration of 3-nodes Cluster, each node has access to a database.
What is DMZ cluster?
The De-Militarized Zone (DMZ) is a logical collection of hardware and services that is made available to outside, untrusted sources. In most Web applications, a bank of Web servers resides in the DMZ to allow browser-based clients access to static HTML content.
