Lesson 4: Distributed File Systems

Question 1

DFS

Answer 1

Distributed File Systems set of technologies that enable a Windows server to organize multiple distributed SMB file shares into a distributed file system. Although the shares can be on different servers, the location is transparent to the users.

Question 2

Two technologies in DFS

Answer 2

DFS Namespaces

DFS Replication

Question 3

DFS Namespace

Answer 3

enables you to group shared folders into a single logical structure. In other words, a DFS Namespace is a shared folder of shared folders (which can be on multiple servers).

Question 4

Two types of DFS namespaces

Answer 4

Domain-based namespace

Stand-alone namespace

Question 5

DFS Replication

Answer 5

enables you to replicate folders between multiple servers. To allow efficient use of the network, it propagates only the changes, uses compression, and uses scheduling to replicate the data between the servers.

Question 6

Domain-based namespaces

Answer 6

configuration is stored in Active Directory, which means that you don’t have to rely on a single server to provide the namespace information to your clients. By using a domain-based namespace, if you change the name of the server that runs the DFS Namespace service and the name of the server changes, you will not have to change the namespace

Question 7

Stand-alone DFS

Answer 7

configuration is stored on the server and the server name becomes part of the main path to the namespace.

Question 8

referral

Answer 8

ordered list of servers or targets that a client computer receives from a domain controller or namespace server when the user accesses a namespace root or a DFS folder with targets.

Question 9

replication group

Answer 9

a collection of servers, each of which holds a target of a DFS folder. You need a minimum of two targets to perform DFS Replication.

Question 10

When you create a DFS replication group, you designate one server as the _______ of the replication group. Files then copy from the ________ to the other target servers. If any of the files in the target folders are different, DFS Replication _______ the other files.

Answer 10

When you create a DFS replication group, you designate one server as the primary member of the replication group. Files then copy from the primary member to the other target servers. If any of the files in the target folders are different, DFS Replication overwrites the other files.

Question 11

By default, replication groups use _________, which means that all members replicate to all other members

Answer 11

By default, replication groups use a full mesh topology, which means that all members replicate to all other members

Question 12

hub/spoke topology

Answer 12

ne server is used to replicate to the other members, which limit the replication traffic to specific pairs of members.

Best used when you have more than 2 members of a replication group

Question 13

DFS Replication repalces _____, which is depreciated as of Server 2012

Answer 13

FRS

File Replication Service

Question 14

RDC

Answer 14

remote differential compression

Comrpession algorithm used by DFS.

detects changes to the data in a file and replicates only those file blocks that changed instead of the entire file.

Question 15

If you disable RDC, you can conserve _____ and ____. Of course, you will consume much more _______.

Answer 15

If you disable RDC, you can conserve processor and disk input/output (I/O). Of course, you will consume much more bandwidth.

Question 16

To figure what needs to be replicated, DFS uses _______.

Answer 16

To figure what needs to be replicated, DFS uses staging folders.

Question 17

Staging Folder

Answer 17

acts as a cache for new and changed files that need to be replicated. It also is used to compress files that need to be sent. When received on the other end, it is used to decompress the file and install the file into the replicated folder.

Question 18

What happens when the same file is modified in two different locations, in DFS replication?

Answer 18

DFS Replication uses a last-writer wins model, which determines which file it should keep and replicate.

Question 19

When DFS replication overwrites a file because it has been edited elsewhere more recently, what happens to the deleted version of the conflict file?

Answer 19

Each replicated folder has its own Conflict and Deleted folder,

The losing file is renamed and stored in the Conflict and Deleted folder on the member that resolves the conflict.