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21 Cards in this Set
- Front
- Back
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What is Network Load Balancing? |
Involves an aggregation of active servers that balance the requests for applications or services.
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What is Windows Server Failover Clustering (WSFC)? |
A feature for improving the high availability (HA) of applications and services.
Each active server has another server identified as its standby server. In order for it to work, each server's hardware specifications must be the same and the servers must share storage. The two servers communicate through a series of "heartbeat" signals over a dedicated network. |
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What are the 3 ways to build a server cluster with WS 2012 VM's? |
1. Cluster in a box - All VM's on one box 2. Cluster across boxes - VM's across servers using shared storage 3. Physical to virtual clustering - Physical servers and VM's |
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What tool does vSphere HA use under the covers? |
Fault Domain Manager (FDM) |
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How does FDM work? |
Uses agents and an election process to select a Master host, which monitors the other slave hosts for failures. |
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What is Virtual Machine Component Protection (VMCP)? |
New feature that will detect storage access failures and allows for a user-configurable automated response for affected virtual machines, including alerts and HA initiated restarts. |
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What is vsphere HA admission control? |
Should vSphere HA allow the user to power on more VMs than it has capacity to support in the event of a failure? Or should the cluster prevent more VMs from being powered on than it can actually protect? That is the basis for the Admission Control
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What are the two settings for HA Admission Control? |
Enable: Disallow VM power-on operations that violate availability constraints.
Disable: Allow VM power-on operations that violate availability constraints. |
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What is overcommitment? |
When the Admission Control setting is set to allow VMs to be powered on even if they violate availability constraints, you could find yourself in a position where more physical memory is allocated to VMs than actually exists.
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What are the three options for Admission Control Policy? |
1. Failover capacity by static number of hosts 2. Failover capacity by reserving a percentage of cluster resources 3. Dedicated failover hosts |
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What is Failover capacity by static number of hosts? |
Allows you to specify how many host failures the cluster should be configured to withstand. Uses slot sizes to calculate capacity of the cluster
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What is failover capacity by reserving a percentage of cluster resources? |
Allows you to specify a percentage of the cluster’s total resources that should be used for spare capacity in the event of a failure.
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What is dedicated failover hosts? |
As the name implies, it allows you to specify one or more hosts as failover hosts. These hosts are almost in a "Maintenance Mode" like state. |
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In regards to vSphere HA, what is VM Monitoring? |
vSphere HA looks for guest OS and application failures. When a failure is detected, vSphere HA can restart the VM.
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How does VM Monitoring monitor guest OS and applications? |
Using VMware tools |
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What is VMware vSphere Data Protection (VDP)? |
VMware's own backup solution with vSphere that leverages VADP. It is bundled with vSphere Essentials Plus and above. It also includes data dedupe
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What is VADP? |
VMware Storage API for Data Protection |
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What are the 3 components to vSphere Data Protection (VDP)? |
1. the VDP virtual backup appliance that will manage the backup and recovery process. 2. the user interface plug-in for vSphere Web Client. 3. the deduplicated destination storage, which is a predetermined sized VMDK within the VDP virtual backup appliance, with the available sizes of 0.5 TB, 1.0 TB, or 2.0 TB. |
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What is VMware Site Recovery Manager (SRM)? |
Disaster recovery automation software that provides policy-based management, non-disruptive testing and automated orchestration. Also helps administrators with the task of orchestrating the startup of all the VMs in a datacenter.
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What is vSphere Replication? |
A virtual appliance that is an IP-based replication engine for vSphere that offers VM-based replication and recovery at the hypervisor level. Available for every license level above Essentials Plus |
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RPO |
recovery point objective (RPO) is the age of files that must be recovered from backup storage for normal operations to resume if a computer, system, or network goes down as a result of a hardware, program, or communications failure.
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