====== VM / Hypervisor  ======

===== Terms ====

  * Hypervisors
    * KVM
    * Hyper-V
    * ESXi  
  * 
  * OpenVZ 
  * KSM - [[https://en.wikipedia.org/wiki/Kernel_same-page_merging|Kernel Samepage Merging]]

  * 

===== Choice =====
  * [[https://www.reddit.com/r/homelab/comments/acerfi/what_is_the_most_appropriate_hypervisor_ecosystem/|What is the most appropriate "hypervisor" ecosystem for a home lab?]]
  * [[https://www.reddit.com/r/homelab/comments/d9shck/xcpng_vs_proxmox/|XCP-NG vs. Proxmox?]]

  * [[https://www.ijstr.org/final-print/mar2018/Comparative-Analysis-Of-Proxmox-Ve-And-Xenserver-As-Type-1-Open-Source-Based-Hypervisors-.pdf|Comparative Analysis Of Proxmox VE And Xenserver As Type 1 Open Source Based Hypervisors]]

  * VMware ESXi
  * Proxmox
  * XCP-ng
  * vSphere

  * oVirt (RHEV)
  * Xen
    * [[https://xenproject.org/|XEN PROJECT]]
      * Open source, free, no corporate support
    * [[https://xenserver.org/|XenServer]] ==> Citrix Hypervisor
      * XenServer is an enterprise-class, cloud-proven, virtualization platform that delivers all of the critical features needed for any server and datacenter virtualization implementation. 
      * XenServer is a Linux distribution that is based on the Xen hypervisor, the Linux kernel, and the CentOS Linux distribution and user tools.
      * free version is limited
      * windows management client
    * XCP-ng
      * (+) Nice **Windows** GUI Tool XCP-ng Center
      * (-) No WEB UI
      * (+) Xen Orchestra independent Web GUI: centralised management tool. Capable to manage multiple locations, moving VMs between locations.
        * delta backups, continuous replication
      * (-) Thin provisioning only on local EXT3/4 fs, NFS, File, XOSAN (VDI files)
        * Block based devices only with THICK provisioning (local LVM, iSCSI, HBA)
      * (-) experimental ZFS

  * Proxmox
    * (+) simple
    * virtualization
      * (+) KVM virtualization
      * (+) native support for LXC
      * (-) no docker support
    * (+) Debian based - possible to do lots of unsupported things from OS
    * (+) run on any HW
    * (+) GPU/PCI passthrough
    * (+) Clustering - one web interface to manage multiple nodes (but not separate locations)
    * (+) CEPH, NFS, CIFS
    * (+) ZFS
    * (+) working memory ballooning
    * (+) KSM