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Revision as of 06:06, 4 July 2016 edit Jmcgnh (talk \| contribs) Extended confirmed users, Page movers, New page reviewers 16,467 edits Disambiguated: jail (computer security) → Operating-system-level virtualization - but not really happy with the choices available; also protects from more than just denial-of-service ← Previous edit		Latest revision as of 22:33, 26 April 2023 edit undo Guy Harris (talk \| contribs) Extended confirmed users 80,063 edits I've no idea whose invention "S390/X" is, but, unlike the other XXX/64, which at least suggest that it's the 64-bit version of XXX, "S390/X" doesn't do that. "s390x" does, at least in the context of Linux. And, if it's 64-bit, link to z/Architecture, which is the name for the 64-bit version of System/3x0, not to anythign 32-bit.
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Line 1: {{Short description\|OS-level virtualisation}} {{multiple\| {{primary sources\|date=May 2014}} {{Citations\|date=January 2014}} }} {{Infobox software \| name = \| logo = [[Image:Linux-VServer-logo.png\|Linux-VServer]] \| screenshot = \| caption = \| developer = Herbert Pötzl (Community Project) \| latest release version = 2.6.22.19-vs2.2.0.7 \| latest release date = {{start date and age\|2008\|03\|14}} \| latest preview version = 4.9.159-vs2.3.9.8 \| latest preview date = {{start date and age\|2019\|10\|05}} \| operating_system = [[Linux]] \| platform = [[x86~~]], [[x86-64~~]], [[SPARC\|SPARC/64]], [[PA-RISC]], [[~~S390\|S390~~z/xArchitecture\|s390x]], [[MIPS architecture\|MIPS/64]], [[ARM architecture\|ARM]], [[PowerPC\|PowerPC/64]], [[Itanium]] \| genre = [[Operating system-level virtualization\|OS-level virtualization]] \| license = [[GNU General Public License\|GNU GPL]] v.2 Line 16 ⟶ 23: '''Linux-VServer''' is a [[virtual private server]] implementation that was created by adding [[operating system-level virtualization]] capabilities to the [[Linux kernel]]. It is developed and distributed as [[open-source software]]. ==Details== The project was started by [[Jacques Gélinas]]. It is now maintained by Herbert Pötzl. ~~of [[Austria]] and~~It is not related to the [[Linux Virtual Server]] project, which implements network [[Load balancing (computing)\|load balancing]]. Linux-VServer is a [[Operating-system-level virtualization\|jail mechanism]] in that it can be used to securely partition resources on a computer system (such as the [[file system]], CPU time, network addresses and memory) in such a way that [[process (computing)\|processes]] cannot mount a [[denial-of-service attack]] on anything outside their partition. Line 29 ⟶ 37: * Virtual servers share the same [[system call]] interface and do not have any [[emulator\|emulation]] overhead. * Virtual servers do not have to be backed by opaque [[disk image]]s, but can share a common file system and common sets of files (through copy-on-write hard links). This makes it easier to back up a system and to pool disk space amongst virtual servers. * Processes within the virtual server run as regular processes on the host system. This is somewhat more memory-efficient and I/O-efficient than whole-system emulation, ~~which~~although ~~cannot~~memory ~~return~~ballooning and modern VMs allow returning "unused" memory ~~or share~~and asharing disk cache with the host and other virtual servers. * Processes within the virtual server are queued on the same scheduler as on the host, allowing ~~guests~~guest's processes to run concurrently on [[Symmetric multiprocessing\|SMP]] systems. This is not trivial to implement with whole-system emulation. * Networking is based on isolation rather than virtualization, so there is no additional overhead for packets. * Smaller plane for security bugs. Only one kernel with small additional code-base compared to 2+ kernels and large interfaces between them. Line 43 ⟶ 51: ==See also== {{Portal\|Free and open-source software}} * [[Comparison of platform virtualization software]] * [[Operating system-level virtualization]] ==References== {{Reflist}} ==External links== Line 52 ⟶ 63: * [http://linux-vserver.org/Linux-VServer-Paper Implementation paper] {{Virtualization software}} {{Linux kernel}} Line 59 ⟶ 70: [[Category:Linux kernel features]] [[Category:Free virtualization software]] [[Category:Linux-only free software]] [[Category:Virtualization~~-related~~ software for Linux]]