ch.5 virtutalization

Question 1

what is virtualization?

Answer 1

each module gets the abstraction of its own computer (like client server)
each module runs on the same hardware

Question 2

multiplexing

Answer 2

a physical memory is broken down into 3 different resources (could be the same as having 3 different VMS)

Question 3

aggregation

Answer 3

gathering together 3 different physical resources to create one virtual resource

Question 4

emulation

Answer 4

imitating the functionality of one system on another

Question 5

what are the three types of virtualization?

Answer 5

emulation, multiplexing, aggregation

Question 6

what is an example of multiplexing?

Answer 6

threads, virtual memory

Question 7

what is an example of aggregation?

Answer 7

RAID, Bound net links (mptcp)

Question 8

what are example of emulators?

Answer 8

hardware emulators, (UTM ARM), RAM DSI

Question 9

what are the abstractions that virtualize each fundamental abstraction?

Answer 9

interpreters -> threads
memory -> virtual memory
communication links -> bounded buffers

Question 10

what are threads

Answer 10

executing specific tasks within the virtual environment (the resources are allocated from the CPU)
often done through multiplexing

Question 11

what is multiplexing?

Answer 11

sharing resources b/w physical and virtual enviroments

Question 12

virtual memory

Answer 12

aka BOO
gives each module its own virtual address space
each module can pretend like it can address all of the bytes
each can use the same address

Question 13

bounded buffers

Answer 13

constant sized buffers created by low level of OS emulators
enable cross thread communication

Question 14

what is a process?

Answer 14

a thread and a virtual memory put together