| Feature
|
Description
|
OpenVZ (stable)
|
Virtuozzo 6 (PCS 6)
|
Virtuozzo 7
|
Virtuozzo 7 Plus
|
LXC
|
Proxmox VE
|
Microsoft Hyper-V 2012 R2
|
RHEV 3.5
|
Citrix XenServer 6.5
|
|---|
| 1. Virtualization platform
|
|---|
| 1.1. Overview
|
|---|
| HW virtualization support (Hypervisor)
|
Full emulation of underneath hardware level: full isolation guest environment, no dependencies from host OS, overhead for hypervisor layer.
|
No
|
Yes
|
Yes
|
Yes
|
No
|
Yes
|
Yes
|
Yes
|
Yes
|
| OS-level virtualization (Containers)
|
Sharing the same instance of host OS: high density, high performance, high dependencies from host OS.
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
No
|
No
|
No
|
| Hypervisor technology
|
Technology that enables to run Virtual Machines.
|
None
|
Parallels Desktop Monitor
|
KVM
|
KVM
|
None
|
KVM
|
Hyper-V
|
KVM
|
Xen
|
| Containers technology
|
Technology that enables to run Containers.
|
Virtuozzo Containers
|
Virtuozzo Containers with enhancements
|
Virtuozzo Containers with enhancements
|
Virtuozzo Containers with enhancements
|
Linux containers
|
LXC (moved from OpenVZ since 4.0)
|
None
|
None
|
None
|
| 1.2. Memory
|
|---|
| Memory Overcommit
|
Ability to present more memory to virtual machines than physically available
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
| Page sharing
|
Memory (RAM) savings through sharing identical memory pages across virtual machines
|
Yes
|
Yes, only for CTs
|
Yes
|
Yes
|
Yes
|
Yes
|
No
|
Yes
|
No
|
| 2. Management
|
|---|
| 2.1. General
|
|---|
| Unified management tool for CTs and VMs
|
Single tool for managing both containers and virtual machines (if applicable)
|
None
|
Yes
|
Yes
|
Yes
|
None
|
No
|
None
|
None
|
None
|
| Central Management tool
|
Is centralized multi-server management available for this edition?
|
Yes, 3rd party
|
Yes, Parallels Virtual Automation (PVA)
|
No
|
Yes, PVA
|
Yes, 3rd party
|
Yes
|
Yes, System Center Virtual Machine Manager
|
Yes, RHEV Manager
|
Yes, XenCenter
|
| 2.2. Upgrade & Backup
|
|---|
| Update Management
|
Integrated patching mechanism for the virtual environments (Guest OS) / guest tools / templates
|
No integrated update, YUM (Linux)
|
No integrated update, YUM (Linux), WSUS (Windows)
|
No integrated update, YUM (Linux), WSUS (Windows)
|
No integrated update, YUM (Linux), WSUS (Windows)
|
No integrated update, APT (Linux)
|
No integrated update, YUM (Linux), WSUS (Windows)
|
Yes (WSUS, SCCM, Virtual Machine Servicing Tool 2012 for offline VM update)
|
No integrated update, YUM (Linux), WSUS (Windows)
|
No integrated update, YUM (Linux), WSUS (Windows)
|
| Live VE snapshot
|
Ability to take a snapshot of a virtual environment while the guest OS is running (e.g. for roll-back or backup purposes)
|
Yes
|
Yes
|
Yes
|
Yes
|
Offline, CRIU support is planned
|
Yes
|
Yes
|
Yes
|
Yes
|
| Integrated Backup
|
Are backup plugins/tools provided to backup virtual environments (over and above the ability to perform classic backup using agents in the guests)
|
No
|
Yes
|
No
|
Yes
|
No
|
Yes
|
Yes
|
No
|
No
|
| Backup Integration API
|
Integration with 3rd party backup applications for backup of the virtual environment.
|
No (only through snapshots)
|
Yes
|
Yes
|
Yes
|
No (only through snapshots)
|
Yes (vzdump)
|
Yes
|
Yes
|
No
|
| 2.3. Others
|
|---|
| VEs Templates (VM, CT)
|
Ability to create and store master images and deploy virtual machines from them
|
Yes (CT only)
|
Yes
|
Yes
|
Yes
|
Yes (OpenVZ templates)
|
Yes
|
Yes
|
Yes
|
Yes
|
| P2V migration
|
Integrated or added P2V (or V2V) capability in order to convert physical systems to virtual environment.
|
No
|
Yes
|
Yes
|
Yes
|
No
|
No, 3rd party tools
|
Yes
|
No
|
No
|
| 3. VE Mobility and HA
|
|---|
| 3.1. VE Mobility
|
|---|
| Live Migration of VEs
|
Ability to migrate virtual machines between hosts without perceived downtime
|
Yes, but with no zero downtime
|
Yes, Kernal-Level Migration
|
Yes, CRIU
|
Yes, CRIU
|
Offline, CRIU support is planned
|
Yes
|
Yes
|
Yes
|
Yes
|
| Automated Live Migration (DRS)
|
Ability to put host into maintenance mode which will automatically live migrate all virtual machines onto other available hosts so that the host can be brought shut down safely
|
No
|
No
|
No
|
Yes
|
No
|
No
|
Yes
|
Yes
|
Yes
|
| Storage Migration
|
Integrated Power Management features Ability to automatically migrate vms onto fewer hosts and power off unused capacity (hosts), wake systems back up when required
|
No
|
No
|
No
|
No
|
No
|
No
|
Yes
|
Yes
|
Yes
|
| 3.2. HA / DR
|
|---|
| Cluster size
|
Maximum number of hosts in the cluster/pool relationship and maximum number vms per cluster/pool (if specified)
|
None
|
32 hosts/cluster validated (100 hosts/cluster maximum) - PStorage limitation
|
Not tested yet
|
Not tested yet
|
None
|
32 nodes
|
64 nodes
|
200 nodes
|
16 nodes
|
| Integrated HA
|
Recover virtual environment in case of host failures through restart on alternative hosts (downtime = restart time)
|
No
|
Yes
|
No
|
Yes
|
No
|
Yes
|
Yes
|
Yes
|
Yes
|
| Site Failover
|
Integrated ability to (ideally live) migrate virtual machine data (virtual disk files) to different storage e.g. for array upgrades/migration and I/O management
|
No
|
No
|
No
|
No
|
No
|
No
|
Manual
|
No
|
Integrated Disaster Recovery - manual
|
| 4. Network and Storage
|
|---|
| 4.1. Storage
|
|---|
| Supported Storage
|
Supported types of Storage (DAS: Direct Attached Storage, NAS: Network Attached Storage, FC: Fibre Channel, iSCSI, FCoE - Fibre Channel over Ethernet)
|
DAS (EXT4)
|
NAS (NFS), DAS (EXT4)
|
DAS (EXT4)
|
NAS (NFS), DAS (EXT4)
|
NAS (NFS), DAS (EXT4)
|
SAN, NAS (NFS), Ceph
|
DAS, NAS (SMB), SAN (iSCSI, FC, FCoE)
|
DAS, NAS (NFS), SAN (iSCSI, FC, FCoE)
|
DAS, NAS (NFS), SAN (iSCSI, FC, FCoE)
|
| Virtual Disk Format
|
Supported format(s) of the virtual disks for the virtual machines
|
CT - ploop
|
CT - ploop, VM - ploop
|
CT - ploop, VM - ploop\Qcow2
|
CT - ploop, VM - ploop\Qcow2
|
Any
|
qcow2
|
vhdx, vhd, pass-though (raw)
|
Qcow2, raw disk
|
vhd, raw disk
|
| Thin Disk Provisioning
|
Ability to over-commit overall disk space by dynamically growing the size of virtual disks based on actual usage rather than pre-allocating full size.
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes, depends on disk format (dm-thin)
|
Yes (???)
|
Yes
|
Yes
|
Yes
|
| Virtual SAN
|
Enhanced storage capability e.g. providing a virtual SAN through virtualized 'local' storage
|
Yes, Virtuozzo Storage
|
Yes, Virtuozzo Storage
|
Yes, Virtuozzo Storage
|
Yes, Virtuozzo Storage
|
Yes, but 3rd party (DRBD 9, Ceph, GlusterFS)
|
Yes, but 3rd party (DRBD 9, Ceph, GlusterFS)
|
Yes, Storage Spaces
|
Yes, Red Hat Storage
|
No
|
| Storage QoS
|
Ability to control Quality of Service for Storage I/O for virtual machines
|
No
|
Only IOPs limits
|
Only IOPs limits
|
Only IOPs limits
|
No
|
No
|
Yes
|
Yes
|
Yes
|
| 4.2. Network
|
|---|
| Advanced Network Switch
|
Centralized virtual network configuration (rather than managing virtual switches on individual hosts), typically with enhanced networking capabilities
|
No
|
No
|
No
|
No
|
No
|
Yes, Open vSwitch support
|
Yes
|
OpenStack Neutron Integration
|
Open vSwitch integration
|
| Network QoS
|
Ability to create and store master images and deploy virtual machines from them
|
Only bandwidth limits
|
Only bandwidth limits
|
Only bandwidth limits
|
Only bandwidth limits
|
Only bandwidth limits
|
Yes, with Open vSwitch
|
Yes
|
Yes
|
Yes
|
| 5. Others – most of features are relevant only for Odin Virtuozzo editions
|
|---|
| Memory deduplication for binary files
|
Memory and IOPS deduplication management that enables/disables caching for Container directories and files, verifies cache integrity, checks Containers for cache errors, and purges the cache if needed
|
No
|
Yes, pfcache
|
Yes, pfcache
|
Yes, pfcache
|
No
|
No
|
None
|
None
|
None
|
| Completely isolated disk subsystem for CTs
|
|
Yes, ploop
|
Yes, ploop
|
Yes, ploop
|
Yes, ploop
|
Yes, with LVM
|
No
|
None
|
None
|
None
|
| API\SDK
|
|
OpenVZ API for Ruby, LibVirt
|
Virtuozzo SDK, LibVirt
|
Virtuozzo SDK, LibVirt
|
Virtuozzo SDK, LibVirt
|
LibLXC, API for Ruby, Python 2, Haskell, Go
|
Proxmox VE uses a REST like API (JSON data format)
|
Windows SDK
|
RHEV-M API: REST API, SDKs
|
XenAPI, XenServer SDKs
|
| Image Catalog integration
|
Integration with 3rd-party image catalog services of popular server applications and development environments that can be installed with one click.
|
No
|
No
|
No
|
Yes (Bitnami)
|
No
|
Yes (Turnkey)
|
None
|
None
|
None
|
| Open Stack integration
|
Driver for Open Stack Nova
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
(LXC and KVM supported through libvirt)
|
Yes
|
Yes
|
Yes
|
| Kernel maintenance
|
Ability to upgrade kernel with minimal downtime.
|
KernelCare service integration
|
kernel rebootless update (vzreboot)
|
KernelCare service integration
|
kernel rebootless update (vzreboot)
|
KernelCare service integration
|
KernelCare service integration
|
None
|
KernelCare service integration
|
KernelCare service integration
|
| Power Panel
|
A tool used for managing particular virtual machines and containers by their end users.
|
No
|
Yes
|
No
|
Yes
|
None
|
None
|
None
|
None
|
None
|
| 6. Commercial
|
|---|
| Open Source
|
|
Yes
|
No
|
Yes
|
No
|
Yes
|
Yes
|
No
|
No
|
No (but there is Open Source edition)
|
| License\Subscription
|
|
No
|
Yes
|
No
|
Yes
|
No
|
No
|
Yes
|
Yes
|
Yes, Enterprise Edition
|
| Support
|
|
Both community and commercial support
|
Commercial support
|
Community support
|
Commercial Support
|
Yes, Canonical Ltd.
|
Both community and commercial support
|
Commercial support
|
Commercial support
|
Both community and commercial support
|