Week 5 - File system / File Management Commands

Question 1

Storage device, file system, and application software.

Answer 1

Components

Question 2

The operating system (OS) manages the file system and application I/O

Answer 2

Process

Question 3

Storage is directly attached to the server (via host bus adapter, etc.)

The by far most common way to access storage is so simple that we rarely think about it as a storage model:

Answer 3

Direct Attached Storage (DAS)

Question 4

Storage inside the server case

Answer 4

Internal Storage

Question 5

Connected via external ports (USB, Fibre Channel, etc.)

Answer 5

External storage

Question 6

What is RAID?

Answer 6

Redundant Array of Independent Disks
(RAID)

Question 7

What is LVM?

Answer 7

Logical Volume Manager
(LVM)

Question 8

Multiple clients access storage over the network.

Answer 8

Network Attached Storage (NAS)

Question 9

One system holds all storage, accessible by other clients

Answer 9

Centralized file server

Question 10

This networks are frequently labeled an “enterprise solution” due to their significant performance advantages and distributed nature

Answer 10

Storage Area Networks (SAN)

Question 11

What is SCSI?

Answer 11

Small Computer System Interface

Question 12

High-performance storage network using protocols like Fibre Channel or iSCSI.

Answer 12

Storage Area Networks (SAN)

Question 12

What is FCP and LUN?

Answer 12

Fibre Channel Protocol
Logical Unique Number

Question 13

File System Level

What are the Commercial services that offers file hosting or file storage services?

D, GD, Ai, M. OD

Answer 13

• Dropbox
• Google Drive
• Apple’s iCloud
• Microsoft’s OneDrive

Question 14

Remote storage over the internet

Accessible from anywhere via cloud services.

Answer 14

Cloud Storage

Question 15

3 Distinct categories within this storage model

Answer 15

File System Level
Object Level
Block Level

Question 16

Object storage Level

Services that provide access on the object level

hiding file system implementation details from the client, provide easier abstraction

A. 3S, WABS

Answer 16

Amazon’s Simple Storage Service
Windows Azure’s Blob Storage

Question 17

Block storage Level

Services that offer clients access on the block level

Allows them to create file systems and partitions as they see fit

EBS, OS CS

Answer 17

Amazon’s Elastic Block Store
OpenStack’s Cinder service

Question 18

Reduced to its most basic tasks, a ____ ____ is responsible for storing, managing and updating data on the storage device in question.

Answer 18

file system

Question 19

Manage block device storage, files, directories, and metadata (e.g., ext4, NTFS).

Answer 19

Disk File Systems

Question 20

Allow multiple systems to access a centralized storage resource over a network (e.g., NFS, AFS).

Answer 20

Distributed File Systems

Question 21

Unix world, there exists an old mantra: “Everything is a file.”

Unix supports special files like network sockets, character/block devices, and pseudo-devices (e.g.,/dev/null)

Answer 21

Other File Systems

Question 22

Directories and files are organized in a tree structure.

Answer 22

File System Layout