Datasheet

applicatiOn SerViceS
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stack, such as NetQueue, that can saturate even 10 Gbps links for both transmit and receive-side
network I/O. You will also notice a significant increase in iSCSI throughput and maximum net-
work throughput for VMotion because of the VMkernel TCP/IP stack optimizations in vSphere 4.
VMdi r e c t Pa t h i/o F o r ne t w o r k i n g
VMDirectPath I/O for Networking is a new capability in vSphere that enables virtual machines
to directly access underlying physical I/O devices. Similar to VMDirectPath I/O for Storage,
VMDirectPath is designed for special-purpose I/O appliances and network I/O-intensive vir-
tual machines that require very efficient network stack processing for high throughput but do
not need to support additional virtualization features such as VMotion, Fault Tolerance, and
suspend/resume.
In vSphere 4, VMDirectPath I/O for Networking is supported for the following devices:
Intel 82598 10 Gigabit Ethernet Controller
•u
Broadcom 57710 and 57711 10 Gigabit Ethernet Controller•u
Application Services
Virtualization enables interesting use cases such as VMotion and VMware HA that can used by
any application running inside virtual machines. VMware vSphere application services build
upon such use cases to deliver enterprise readiness features for applications running inside
VMware virtual machines. These services are expected to enhance the service levels for virtual-
ized applications more easily compared to physical deployments.
VMware vSphere provides the following types of application services:
Availability
•u
Security•u
Scalability•u
We’ll take a closer look at each type of application service in the next sections.
Availability
Improving availability for applications is probably the most innovative and exciting use of
virtualization technology. With availability services in vSphere, you can lower both planned
and unplanned downtime for all applications running inside VMware virtual machines.
Furthermore, vSphere enables this high availability without the need for complex hardware or
software clustering solutions.
To minimize service disruptions because of planned hardware downtime, VMware vSphere
includes the following availability services:
VMware VMotion Using VMware VMotion, you can migrate running virtual machines
from one vSphere server to another without impacting the applications running inside virtual
machines. The end users do not experience any loss of service. You can leverage VMotion to
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