DistOS 2014W Lecture 8

Group 1

NFS:

1) per operating traffic

2) rpc based

3) unreliable

AFS:

1) design for 5000 clients

2) high integrity.

Group 2

NFS:

1) designed to share disks over a network, not files

2) more UNIX like

3) portable

4) use UDP

5) it is not minimize network traffic.

6) used VNODE

7) not have much hardware equipment

8) later versions took on features of AFS

9) stateless protocol conflicts with files being state-full by nature.

AFS:

1) designed to share files over a network, not disks

2) better scalability

3) better security.

4) minimize network traffic.

5) less UNIX like

6) plugin authentication

7) needs more kernel storage due to complex commands

8) inode concept replaced with fid

Group 3

NFS:

1) cache assumption invalid.

2) no locking

3) bad security

AFS:

1) cache assumption valid

2) locking

3) good security.