1) What exactly does the hypervisor do? Why is it needed?
2) What is the difference between hypervisor and Java Virtual mMchine?
3) Does JVM use a hypervisor?
4) Why use a hypervisor when a host operating system like linux can handle multiple guest operating systems?
If someone knows something about this, it would be helpful
>Both are virtualization layers. However, Java is optimized for performance and portability. Although Java is technically an emulator, It is much faster than a hypervisor. This can be achieved because the simulation platform is designed for fast simulation. Java does not run x86 or x86_64/amd64 code, it runs something called Bytecode. The technical term for bytecode is Intermediate language (IL). It is compiled by a just-in-time compiler (JIT) into the code that is native to the runtime processor. When JIT executes the compilation process, it can ensure that the program follows the security constraints of Java, but does not generate those that violate these constraints Code. Hyperviser enforces security constraints by intercepting so-called privileged instructions and emulating devices such as disk drives. This is done because the native x86 or x86_64/amd64 code is very difficult to understand for the program, and it is changed to make it safe to execute on its own Constraints are almost impossible. On the other hand, Java runs Bytecode, which is easy to understand and opportunities for programs, so it can enforce security rules by itself.
Short answer: Hypervisors are better than Java Slow, but allows you to run a large number of complete operating systems, and all the software available for them. Although Java is faster, you can only run Java software on it. If you want to run Windows and Office in a virtual machine, then It is not possible to do this in Java.
>I think I answered this question above, but no, it uses code inspection and modifies the program to enforce the security rules on its own. This can be done because it can be The running Java application is in an intermediate state called Bytecode. Java is easy to understand, check, find code that may violate the rules and modify it to comply with the rules. This is a rather complicated process, and there are several Advantages. The first advantage is “compile once and run” because Java is compiled and distributed as bytecode. The second advantage is speed. Even if strict security is enforced, JIT:ed code has the same characteristics as non-virtualized code. The same speed. The disadvantage is that only Bytecode programs can run, so you cannot run Windows or Lin in a virtual machine ux.> If you are running other operating systems such as Windows or other Linux distributions-you are running Hyperviser. KVM, Xen and VirtualBox are examples of hypervisors. You can also use a shared kernel (called operating system-based virtual (Or “containers”) run multiple Linux instances. But Container shares the kernel, so you can only use the virtual machine of the running operating system. The advantage of containers is that they are lighter because you don’t need to run multiple instances on top of each other. Kernel…
The question I want to ask is:
1) What exactly does the hypervisor do? Why is it needed?
2) What is the difference between hypervisor and Java Virtual mMchine?
3) Does JVM use a hypervisor?
4) Why use a hypervisor when a host operating system like linux can handle multiple guest operating systems?
If someone knows something about this, it would be helpful
> Hypervisor (also known as hardware virtualization) is A virtualization layer that allows one or more native operating systems to run on it as if they were running on a physical machine. It is similar to emulation, but only runs an operating system that can run without Hyperviser, speed Faster.
>Both are virtualization layers. However, Java is optimized for performance and portability. Although Java is technically an emulator, it is much faster than a hypervisor. This It can be achieved because the simulation platform is designed for fast simulation. Java does not run x86 or x86_64/amd64 code, it runs something called Bytecode. The technical term for bytecode is Intermediate Language (IL). Through just-in-time compiler (JIT) ) To compile it into the native code of the runtime processor. When the JIT executes the compilation process, it can ensure that the program follows the security constraints of Java, but does not generate code that violates these constraints. Hyperviser intercepts so-called privileged instructions and simulates the disk Drives and other devices to enforce security constraints. This is done because native x86 or x86_64/amd64 code is very difficult to understand for programs, and it is almost impossible to change it to make it enforce security constraints on its own. On the other hand, Java Run Bytecode, it is easy to understand and have opportunities for the program, so it can self-enforce security rules.
Short answer: the hypervisor is slower than Java, but allows you to run a large number of complete operating systems, And all the software available for them. Although Java is faster, you can only run Java software on it. If you want to run Windows and Office in a virtual machine, you cannot do this in Java.
>I think I answered this question above, but no, it uses code to check and modify the program to enforce the security rules on its own. This can be done because the runnable Java application is in the middle of a called Bytecode Status, Java is easy to understand, check, find code that may violate the rules and modify it to comply with the rules. This is a rather complicated process, and has several advantages compared to hypervisors. The first advantage is “compile once and run” , Because Java is compiled and distributed as bytecode. The second advantage is speed. Even if strict security is enforced, JIT:ed code has the same speed as non-virtualized code. The disadvantage is that only Bytecode programs can run. So you cannot run Windows or Linux inside the virtual machine.> If you are running other operating systems, such as Windows or other Linux distributions-you are running Hyperviser . KVM, Xen and VirtualBox are examples of hypervisors. You can also use a shared kernel (called operating system-based virtualization or “containers”) to run multiple Linux instances. But Container shares the kernel, so you can only use The virtual machine of the operating system that runs. The advantage of the container is that it is lighter, because you don’t need to run multiple cores on top of each other…