virtualization

问题 I have a question regarding speed & performance of using multiple virtualized nodes in a single machine VS single node on the single machine itself. which one will perform better? The reason why I ask this question is because I am currently learning hadoop on a single machine, and I see some tutorials on the internet that shows the use of multiple virtualized nodes in a single machine. Thank you in advance 回答1: There is always some overhead that comes with virtualization, so unless really

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 8 years ago . I would like to learn how to write a small emulator/virtual machine. Does anyone know a good tutorial or a simpler project than qemu

问题 I am updated docker on my os x 10.10, so it's now using os x native virtualization. However, I've found it tricky to connect to my host machine from within my nginx container. I tried this: /sbin/ip route|awk '/default/ { print $3 }' And got the answer: 172.17.0.1 Then I used this ip in docker-compose.yml: extra_hosts: - "master:172.17.0.1" But nonetheless I keep getting errors: 172.17.0.1 - - [21/Jul/2016:09:33:46 +0000] "GET /api HTTP/1.1" 502 575 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X

问题 I have an *.exe file in \ProgramFiles(x86)\MyAppFolder. In x86 application I check if the file exists (64 bit system). simple: bool fileExists = File.Exists(@"\ProgramFiles(x86)\MyAppFolder\Manager.exe"); The result is: "fileExists == false" (the file is really there). It's Virtualization as I understand.That issue described here Its ok. But next code: bool fileExists = new FileInfo("\\Path").Exists; "fileExists == true" Why is the result different in 1st and 2nd cases? var controller = new

问题 Starting with Android SDK Tools rev 17 the Android emulator supports using the hardware virtualization feature (Intel VT, VT-x, vmx and AMD-V, SVM) which should speed-up x86 based emulator images a lot: http://developer.android.com/guide/developing/devices/emulator.html#accel-vm I installed all necessary components: The newest SDK tools The Intel Hardware Accelerated Execution Manager (and installed it by executing IntelHaxm.exe) Intel Atom x86 System Image (available as API 10 and API 15

问题 Starting with Android SDK Tools rev 17 the Android emulator supports using the hardware virtualization feature (Intel VT, VT-x, vmx and AMD-V, SVM) which should speed-up x86 based emulator images a lot: http://developer.android.com/guide/developing/devices/emulator.html#accel-vm I installed all necessary components: The newest SDK tools The Intel Hardware Accelerated Execution Manager (and installed it by executing IntelHaxm.exe) Intel Atom x86 System Image (available as API 10 and API 15

问题 Before the advent of hardware assisted virtualization there were instructions that could not be virtualized due to various reasons. Can somebody please explain what those instructions are and why they cannot be virtualized? 回答1: To virtualize an ISA, certain requirements must be met. Popek and Goldberg used something like the following: A machine has at least two modes (a) user mode and (b) system mode . Typically, applications run in user mode and the operating system runs in system mode .

问题 You may be familiar with ReplayDirector, http://www.replaysolutions.com/products/replaydirector-for-java-ee Chronon, http://www.chrononsystems.com/products/chronon-time-travelling-debugger they both advertise themselves as 'Java DVRs' - are there any open-source implementations that offer similar (even a subset of their) features? 回答1: The only ones I know of are WhyLine Not open source yet, but may eventually be, free download though Omniscient Debugger Jive Diver TOD 回答2: Omniscient

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . I've seen people on the net offering images of a particular Linux setup, and they offer it as either VMDK/VMX files or ISO files. Now an ISO seems to work with VirtualBox, because I can tell it to mount a CD/DVD drive and use the ISO instead of a physical drive, but the VMDK and VMX files are always listed as

问题 I'm looking for a Java library that can open .vhd files. I wants to create a program that can navigate inside it. I also want it to be cross-platform. I have googled for an library a while now but found nothing. I did only find an old unanswerd question here on stack overflow. Can anyone help me? 回答1: Consider libguestfs. libguestfs is a C library, but it has a Java binding. It claims to be cross-platform, working on Linux and Mac OS X, and "[s]ome virt tools have been ported to Windows".