Changes
LXC can use ZFS as completely isolated disk subsystem for CTs
{{StubNote|This comparison doesn't include Docker, because Docker is not a virtualization solution. It automates the deployment of applications inside software containers, by providing an additional layer of abstraction and automation of operating-system-level virtualization.<ref>[https://en.wikipedia.org/wiki/Docker_(software) Wikipedia article about Docker]</ref>}}
== Disclaimer == The information regarding Virtuozzo 7 is provided by [http://www.virtuozzo.com Virtuozzo]. Here is the Virtuozzo's statement regarding this information: :#The information contained herein is intended to outline general product direction and should not be relied upon in making purchasing decisions.:#The content is for informational purposes only and may not be incorporated into any contract.:#The information presented is not a commitment, promise, or legal obligation to deliver any material, code or functionality.:#Any references to the development, release, and timing of any features or functionality described for these products remains at Virtuozzo’s sole discretion.:#Product capabilities, timeframes and features are subject to change and should not be viewed as Virtuozzo commitments. The information regarding all other solutions are taken by authors from public sources only. This information can be changed by any OpenVZ Wiki user without any notice and author's review or approval. == Feature comparison of different virtualisation virtualization solutions ==
{| class="wikitable sortable"
!ParameterFeature! Description!OpenVZ-legacy!Virtuozzo 6 (PCS 6)!Virtuozzo OpenVZ 7 OpenVZ![https://virtuozzo.com/products/virtuozzo-containers/ Virtuozzo 7 Commercial]! LXC!ProxmoxVE! Microsoft Hyper-V 2012 R2! RHEV 3.5!Citrix XenXenServer 6.5|-!colspan="11" style="font-style:bold;background-color:gold;"|1. Virtualization platform|-!Microsoft colspan="11" align="left"|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.|{{No}}|Parallels Desktop Monitor|KVM|KVM|{{No}}|KVM|Hyper-V|KVM|Xen|-|'''Windows guest OS additional support'''|WHQL-signed drivers, SVVP certification|N/A|{{Yes}}|{{No}}|{{Yes}}|{{Yes}}|{{No}}|{{Yes}}|{{Yes}}|{{Yes}}|-|'''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)|{{No}}|{{No}}|{{No}}|-!colspan="11" align="left"|1.2. Memory|-|'''Memory Overcommit'''|Ability to present more memory to virtual machines than physically available |{{Yes}}|{{Yes}}|{{Yes}}, with new VCMMD memory management|{{Yes}}, with new VCMMD memory management and different policies|{{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}}|-|'''Online Memory Management for VM'''|Ability to change amount of RAM for CT and VM without reboot|{{No}}|{{No}}|{{Yes}}|{{Yes}}|N/A|{{Yes}}|{{Yes}}|{{No}}|{{No}}|-!colspan="11" style="font-style:bold;background-color:gold;"|2. Management|-!colspan="11"|2.1. General|-|'''Unified management tool for CTs and VMs'''|Single tool for managing both containers and virtual machines (if applicable)|N/A|{{Yes}}|{{Yes}}|{{Yes}}|{{No}}|{{Yes}}|N/A|N/A|N/A|-|'''OpenStack integration'''|Integration with OpenStack components ([http://docs.openstack.org/developer/nova/support-matrix.html see details])|{{Yes}}, only Nova|{{Yes}}|{{Yes}}|{{Yes}}|{{Yes}}|{{No}}|{{Yes}}|{{Yes}}|{{Yes}}|-|'''Integrated GUI'''|Centralized multi-server management|{{Yes}}, 3rd party|{{Yes}}, Parallels Virtual Automation (PVA)|{{No}}|{{Yes}}, [https://www.virtuozzo.com/support/all-products/virtuozzo-automator.html Automator]|{{Yes}}, 3rd party|{{Yes}}|{{Yes}}, System Center Virtual Machine Manager|{{Yes}}, RHEV Manager|{{Yes}}, XenCenter|-!colspan="11"|2.2. Upgrade & Backup|-|'''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}}|{{Yes}}|{{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}}|{{No}} (only through snapshots, new version is not finished yet)|{{No}} (only through snapshots, new version is not finished yet)|{{No}} (only through snapshots)|{{Yes}} (vzdump)|{{Yes}}|{{Yes}}|{{No}}
|-
!colspan="11"|Virtualization type|Containers|Containers and hypervisor|Containers and hypervisor|Containers and hypervisor|Containers and hypervisor|Hypervisor|Hypervisor2.3. Others
|-
|Guest OS support'''VEs Templates (VM, CT)'''|LinuxAbility to create and store master images and deploy virtual machines from them|Windows, Linux, FreeBSD{{Yes}} (CT only)|Windows, Linux{{Yes}}|Windows, Linux{{Yes}}|Windows, Linux, FreeBSD{{Yes}} |Windows, Linux {{Yes}} (limited supportOpenVZ templates)|Windows, Linux (limited support){{Yes}}|{{Yes}}|{{Yes}}|{{Yes}}
|-
|Unified management tools for CTs and VMs'''P2V migration'''|Integrated or added P2V (or V2V) capability in order to convert physical systems to virtual environment.|{{No}}|{{Yes}}|{{Yes}}|{{No}}, 3rd party tools|{{No}}|Yes{{No}}, 3rd party tools|???{{Yes}}|???{{No}}|???{{No}}
|-
!colspan="11" style="font-style:bold;background-color:gold;"|Central management|[[Control_panels|Yes]]|PVA|???|???|???|???|???3. VE Mobility and HA
|-
!colspan="11"|Toolkit for compact of fat ploop images|No|Yes, pcompact|Yes, pcompact|Yes, pcompact|NA|NA|NA3.1. VE Mobility
|-
|Toolkit for migration physical servers '''Live Migration'''|Ability to containersmigrate virtual machines between hosts without perceived downtime|No{{Yes}}, only [[Physical_to_containerbut with no zero downtime|instruction]]{{Yes}}, Kernel-Level Migration|{{Yes}}, p2c migrateCRIU for containers|{{Yes}}, p2c migrateCRIU for containers|{{Yes}}|{{Yes, p2c migrate}}|???{{Yes}}|???{{Yes}}|???{{Yes}}
|-
!colspan="11"|Rebootless kernel update|No|Yes, vzreboot|Yes, vzreboot|Yes, vzreboot|NA|NA|NA3.2. HA / DR
|-
|Pure kernel live updates'''Integrated HA'''|Recover virtual environment in case of host failures through restart on alternative hosts (downtime = restart time)|{{No, only with external tool [http://kernelcare.com/ KernelCare]}}|{{Yes}}|{{No, only with external tool [http://kernelcare.com/ KernelCare]}}|???{{Yes}}|{{No}}|???{{Yes}}|???{{Yes}}|???{{Yes}}|???{{Yes}}
|-
!colspan="11" style="font-style:bold;background-color:gold;"|Repair mode for VPS|No|Yes|???|???|???|???|???4. Network and Storage
|-
!colspan="11"|Live migration between servers (no zero downtime)|Yes|Yes|Yes|???|???|???4.1. Storage
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|Live migration between servers '''Supported Storage'''|Supported types of Storage (zero downtimeDAS, NAS or SAN)|NoDAS (EXT4)|YesNAS (NFS), DAS (EXT4)|YesDAS (EXT4)|NAS (NFS), DAS (EXT4)|NAS (NFS), DAS (EXT4)|YesDAS, NAS (NFS, ZFS), SAN (iSCSI), Ceph |???DAS, NAS (SMB), SAN (iSCSI, FC, FCoE)|???DAS, NAS (NFS), SAN (iSCSI, FC, FCoE)|???DAS, NAS (NFS), SAN (iSCSI, FC, FCoE)
|-
|Flexible container OS templates'''Virtual Disk Format'''|NoSupported format(s) of the virtual disks for the virtual machines|CT - [[ploop]]|CT - [[ploop]], only VM - [https://openvz.org/Download/template/precreated precreated templates[ploop]]|YesCT - [[ploop]], vztemplatesVM - [[ploop]]\Qcow2|YesCT - [[ploop]], VM - [[ploop]]\Qcow2|YesAny|???Qcow2, vmdk, raw|???vhdx, vhd, pass-though (raw)|???Qcow2, raw disk|vhd, raw disk
|-
|Memory deduplication for binary files'''Thin Disk Provisioning'''|NoAbility 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, pfcache techology}}|{{Yes}}|{{Yes}}|{{Yes}}|???{{Yes}}, depends on disk format (dm-thin)|???{{Yes}}, depends on underlying storage driver|???{{Yes}}|???{{Yes}}|???{{Yes}}
|-
|Support for cloud storages for containers'''Software-defined Storage'''|Enhanced storage capability e.g. providing a virtual SAN through virtualized 'local' storage |{{No}}|NFS{{Yes}}, and limited Parallels Cloud Virtuozzo Storage|{{No}}|{{Yes}}, Parallels Cloud Virtuozzo Storage|???{{Yes}}, but 3rd party (DRBD 9, Ceph, GlusterFS)|???{{Yes}}, but 3rd party (DRBD 9, Ceph, GlusterFS, sheepdog)|???{{Yes}}, Storage Spaces|???{{Yes}}, Red Hat Storage|???{{No}}
|-
|Completely isolated disk subsystem '''Storage QoS'''|Ability to control Quality of Service for Storage I/O or Throughput for containersCT/VM|{{Yes, ploop}}|{{Yes, ploop}}|{{No}}|{{Yes, ploop}}|{{No}}|{{Yes}}, ploopVMs only|NA{{Yes}}|NA{{Yes}}|NA{{Yes}}
|-
!colspan="11"|Fast and reliable kernel on top of RHEL 4.2.6.32|Yes|Yes (same version as OpenVZ)|Yes|Yes|Yes|NA|NANetwork
|-
|Full backup capability'''Network QoS'''|No, but open source solutions existsAbility to create and store master images and deploy virtual machines from them|Only bandwidth limits|Only bandwidth limits|Only bandwidth limits|YesOnly bandwidth limits|YesOnly bandwidth limits|{{Yes}}, with Open vSwitch |???{{Yes}}|???{{Yes}}|???{{Yes}}
|-
!colspan="11" style="font-style:bold;background-color:gold;"|Incremental backup|No, and no open source solutions|Yes|Yes|Yes|???|???|???5. Others – most of features are relevant only for Virtuozzo editions
|-
|NUMA optimization (balancing)'''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}}, but some [https://code.google.com/p/vm-balancer-numa/downloads/detail?name=vm-balancer.py&can=2&q= open source solutions exists]pfcache|{{No}}|{{Yes}}, pfcache|Yes{{No}}|Yes{{No}}|???N/A|???N/A|???N/A
|-
|Physical-to-Virtual'''Completely isolated disk subsystem for CTs'''||{{Yes}}, ploop|{{Yes}}, Container-to-Virtual migrationploop|No{{Yes}}, ploop|{{Yes}}, ploop|{{Yes}}, with LVM or ZFS|{{Yes}}, LVM, ZFS, or loop devices|???N/A|???N/A|???N/A
|-
|'''API\SDK'''|[https://libvirt.org/drvopenvz.html |OpenVZ API for Ruby, LibVirt]|YesVirtuozzo SDK, [[Virtuozzo_ecosystem#APILibVirt]]|YesVirtuozzo SDK, [[Virtuozzo_ecosystem#APILibVirt]]|YesVirtuozzo SDK, [[Virtuozzo_ecosystem#APILibVirt]]|???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
|-
|Opensource'''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}}|{{Yes}} Application Image Catalog [https://virtuozzo.com/introducing-the-virtuozzo-application-catalog/ Virtuozzo Application Catalog]|Partially{{No}}|Yes{{No}}|Partially{{No}}|{{Yes}} (Turnkey)|Yes{{No}}|{{No}}|{{No}}
|-
|Source code'''Kernel update without reboot'''|[https://src.openvzIntegrated ability to upgrade kernel or install security patches without downtime.org/projects/OVZL Yes]|???{{No}}, only 3d party tools|[https://src.openvz.org/projects/OVZ {{Yes]}}, Rebootless Kernel Update|[https://src.openvz.org/projects/OVZ Yes]{{No}}|{{Yes}} [https://git.proxmoxreadykernel.com/ YesReadyKernel Service]|[http:{{No}}, only 3d party tools|{{No}}, only 3d party tools|N//www.citrix.ru/go/products/xenserver/xenserver-source-free.html Yes]A|{{No}}, only 3d party tools|{{No}}, only 3d party tools
|-
|Support'''Power Panel'''|A tool used for managing particular virtual machines and containers by their end users.|{{No}}|{{Yes, community support and [[Support}}|pay support]]{{No}}|{{Yes}}|{{No}}|Full support{{No}}|Yes{{No}}|Yes{{No}}|Yes{{No}}
|-
|Hosting automation'''Secure for using in public networks'''|???|{{Yes, }}|{{Yes}}|{{Yes}}|{{Yes}}|{{No}}<ref name="LXC security">[httphttps://wwwseclists.odinorg/oss-sec/2015/q3/att-171/LxcSecurityAnalysis.comtxt LXC Security Analysis]</ruref>, <ref name="Security issues and mitigations with lxc">[https:/products/automationwiki.ubuntu.com/ Odin AutomationLxcSecurity Security issues and mitigations with LXC]</ref>|???|Yes, {{No}}<ref name="LXC security">[httphttps://wwwseclists.odinorg/oss-sec/2015/q3/att-171/LxcSecurityAnalysis.comtxt LXC Security Analysis]</ruref>, <ref name="Security issues and mitigations with lxc">[https:/products/automationwiki.ubuntu.com/ Odin AutomationLxcSecurity Security issues and mitigations with LXC]</ref>|???{{Yes}}|???{{Yes}}|???{{Yes}}
|-
!colspan="11" style="font-style:bold;background-color:gold;"|6. Commercial|-|'''Open Source'''||{{Yes}}|{{No}}|{{Yes}}|{{No}}|{{Yes}}|{{Yes}}|{{No}}|{{No}} (but there is Open Source edition(oVirt))|{{No}} (but there is Open Source edition)|-|'''License\Subscription'''||{{No}}|{{Yes}}|{{No}}|{{Yes}}|{{No}}|{{Yes}}|{{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|-|'''EOL policy'''|Shared storage|[[Parallels_Cloud_StorageReleases|Odin Cloud Storage5 years of support]]|Odin Cloud Storage[https://virtuozzo.com/support/server-lifecycle/ 7 years of support]|TBD|[https://virtuozzo.com/support/server-lifecycle/ 7 years of support]|???|Odin Cloud Storage|CEPH[https://support.microsoft.com/en-us/lifecycle/search/default.aspx?alpha=hyper-v 11 years of support]]|???|???
|-
|}
