Virtual resource partitioning: Difference between revisions

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'''Virtual resource partitioning''' ('''VRP''') is an [[operating system-level virtualization]] technology that allocates computing resources (such as [[CPU]] & [[I/O]]) to transactions. Conventional virtualization technologies allocate resources on an [[operating system]] ([[Windows]], [[Linux]]...) wide basis. VRP works 2 levels deeper by allowing regulation and control of the resources used by specific transactions within an application.<ref>{{

{{cite conference

| last = Lipari| first = G.| last2 = Bini| first2 = E.

| first = G.

| last2 = Bini

| first2 = E.

| authorlink =

| coauthors =

| title = Resource partitioning among real-time applications

| booktitlebook-title = Real-Time Systems, 2003. Proceedings. 15th Euromicro Conference on

| pages = 151- 158151–158

| publisher = IEEE Xplore

| date = 2-42–4 July 2003

| ___location =

| isbn = 0-7695-1936-9| doi = 10.1109/EMRTS.2003.1212738| hdl = 11382/374720

| date = 2-4 July 2003

| hdl-access = free

| url = http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=1212738

}}</ref>

| isbn = 0-7695-1936-9

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In many computerized environmentenvironments, a single user, application, or transaction can dominateappropriate all server resources and by that, affect the QoSquality of service & Useruser experience of other active users, applicationapplications or transactions. For example, a single report in a [[data warehouse]] environment can monopolize data access by demanding large amounts of data. Similarly, a CPU-bound application may consume all server processing power and starve other activities.

For instance: A single report in a Data warehouse environment can jam the Storage by producing high amount of IO/sec throughput. Or a CPU bound application may use all Server CPU power and cause CPU starvation to other activities.

VRP technology allows balancing, regulating and manipulating the resource consumption of each and every transaction, and by that, improving the overall QoS, SLA & End user experience.

VRP technology allows balancing, regulating and manipulating the resource consumption of eachindividual and every transactiontransactions, and by that, improving the overall QoSquality of service, SLAcompliance with service level agreements, and the &ultimate Endend user experience.

==VRP technology overview==

==VRP technologyTechnology overview==

VRP is usually implemented at the Operating system in a way that is completely transparent to the application or transaction.

VRP is usually implemented in the OS in a way that is completely transparent to the application or transaction. The technology creates virtual resource "lanes", each of which has access to a controllable amount of resources, and redirects specific transactions to those lanes allowing them to take more or less resources according to the lane definition.

VRP technology can be implemented in any OperatingOS system.and Existingis vendors in the market applied itavailable on most of the Open operating system such as [[Microsoft Windows|Windows]], [[Red Hat]], [[SUSE Linux|Suse]], [[HP-UX]], [[Solaris (operating system)|Solaris]], [[tru64]], [[AIX]] and others.

In any Operating systemOS, the application is communicatingcommunicates with the KernelOS kernel in a differentspecific way which requires a different VRP implementation. A safe implementation of VRP. Windowsusually iscombines managingseveral resoruceresource allocation intechniques. aVRP completeimplementations differentdepend wayon thanrapidly Linuxvarying Kernel.transaction Thereforetype, applyingconsumed virtualresource resoruceand laneskernel state. The VRP implementation ismust usuallyadapt kernelto such changes in dependentreal-time.

A safe implementation of VRP technology is usually made up of a mixture of several resource allocation techniques. VRP implementations depend on the transaction type, consumed resource or Kernel state. In a real and live system, Kernel state, transaction types and resource consumption are constantly changing and therefore the VRP technology should change the implemented technique accordingly in real-time.

==References==

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* [http://www.slideshare.net/jimmyschwarzkopf/infrastructure-market-2009 VRP as a new trend in the IT industry]

* [http://www.morevrp.com/resources/about-vrp VRP technical overview as implemented by one of the VRP vendors]

[[Category:Virtualization software]]