A Network Of Virtual Machine Monitors For Caching ynamic Content一種緩存動態(tài)內(nèi)容的虛擬機(jī)監(jiān)視器網(wǎng)絡(luò)

1、the vmatrix: a network of virtual machine monitors for dynamic content distributionamr a. awadallahmendel rosenblumaaa,stanford university computer systems lab wcw 2002stanford university csl wcw 2002what is the vmatrix?stanford university csl wcw 2002problem statementmotivation

2、: to enable distribution of dynamic content.(40% of web requests)definition:dynamic content is web pages which are constructed by programs that execute on the server at the time a request is made. (e.g. http:/)stanford university csl wcw 2002advantages of distribution faster response time higher ava

3、ilability absorbing flash crowds network bandwidth savings lower total cost of ownershipstanford university csl wcw 2002today is static mirroringstanford university csl wcw 2002dynamic content distributionstanford university csl wcw 2002two tier architecturestanford university csl wcw 2002main probl

4、emit is very hard to copy services due to all the dependencies that code has on system libraries, third-party modules, operating systems, and server hardware.amended motivation:to enable distribution of server code with minimal application, code, or operating system changes (i.e. backward compatibil

5、ity with existing implementations)stanford university csl wcw 2002virtual machine monitorsvirtual machine monitorreal machine (cpu, memory, disks, network)virtual machine 1:vcpu, vmem, vdisk, vnetos1: windows 2000virtual machine 2:vcpu, vmem, vdisk, vnetos2: linuxmysql, apacheoracle, iisstanford uni

6、versity csl wcw 2002proposed solutiona network for delivering virtual machines (vms) between real machines (rms) running the virtual machine monitor (vmm) software.stanford university csl wcw 2002distinguishing advantage backward compatibilitydisadvantage vm files are very large (order of gigabytes)

7、!stanford university csl wcw 2002challenges: mobility (nat)vmmrmvm agentvm1 vm20nat/lbinternet8dns 8stanford university csl wcw 2002challenges: security (vpns)vmmvm1 vm2rmvm agentvpnintranetdns0firewalli 8nat/lbinternet8stanford universit

8、y csl wcw 2002two tier challenges response timefront endback endn1front endn1back endn2back end perception!stanford university csl wcw 2002two tier challenges availabilityfront endback endstanford university csl wcw 2002two tier challenges replicationback endfront endfront endfront endstanford unive

9、rsity csl wcw 2002related work active proxy caches (icap, active cache, opes) app servers (websphere, dynamo, weblogic) java virtual machine (j#/c#/.net) light weight oses (denali, xenoservers) os virtualization (ensim, ejasent, exetender) portable channel representations (e.g. rpms)stanford univers

10、ity csl wcw 2002current & future work global server placement optimization vm scheduling per rm server multiplexing compute utility (the collective) roc: virtual hot standbys internet scale applications characteristicsstanford university csl wcw 2002conclusionusing off the shelf technologies available today it is possible to build a network f