COMPARISON GUIDE
COMPARISON GUIDE / 3
VMware vSphere 6 with Operations Management
Key Features and Benefits Comparison
KEY FEATURES AND BENEFITS VMWARE VSPHERE®
WITH OPERATIONS
MANAGEMENT™ 6
MICROSOFT WINDOWS SERVER
2012 R2 HYPER-V & SYSTEM CENTER
2012 R2
RED HAT ENTERPRISE
VIRTUALIZATION 3.5
• Memory Ballooning - Shift memory dynamically from idle virtual machines to active ones. Memory ballooning
artificially induces memory pressure within idle virtual machines, forcing them to use their own paging areas and
release memory for active virtual machines.
3
Dynamic Memory support is limited to
specific guest operating systems and service
pack levels and must be configured for each
and every VM
http://technet.microsoft.com/en-us/library/
hh831766.aspx
Limited, ballooning is possible with Virtio but
can interfere with KSM
• Memory Compression - ESXi will selectively compress memory pages to delay the need to swap to disk when
under memory pressure. Compression operates significantly faster than swapping, so VM performance is
maintained longer.
3
No No
• Hypervisor Paging - When more memory is needed than can be provided by the above methods or an instant
response is needed, ESXi will swap memory pages to disk
3
Limited, Hyper-V Smart Paging acts only
when a VM is restarted and memory can be
reclaimed from other VMs on the same host
Yes
• Guest Memory Resource Shares - Prioritize memory allocations to VMs by assignable shares. Leverage resource
pools for comprehensive resource configuration management. Ensures critical VMs get memory needed to meet
service level agreements.
3
Limited, Hyper-V’s memory weight feature is
simplistic and lacks enforcement. It’s dicult
to manage due to a lack of a logical resource
pool management object
No, quotas only allow for limits to be placed
on resources, there is no ability to assign
shares or even reservations
• Swap to Host Cache - The VMkernel scheduler is modified to allow ESXi swap to extend to local or network SSD
devices, which enables memory over commitment and minimizes performance impact. The VMkernel automatically
recognizes and tags SSD devices that are local to ESXi or are on the network.
3
Limited w/Hyper-V Smart Paging No
Hot Add virtual devices without downtime
• Memory – Add virtual memory
3
Requires explicit guest operating support for
Dynamic Memory. Note that you cannot
enable dynamic memory, increase minimum
RAM or decrease maximum RAM while online
No, including inability to change memory
reservations hot
• Hard Disk – Add or remove virtual storage
– Hot-add virtual disks
3
Only possible for SCSI attached drives Yes
– Hot-extend virtual disks
3
No ability to hot extend boot volumes for
Gen 1 VMs
No
• CPU – Add or remove virtual processors
3
No Yes
• NIC – Add or remove virtual networking devices
3
No Yes
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