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Data Management & Storage > Review - Section 2 > Flashcards

Review - Section 2 Flashcards

Memorization of some of the key terms/ideas from Chapters 5-8 (53 cards)

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1
Q

SAN

A

Carries data between servers (or hosts) and storage devices and enables organizations to connect geographically dispersed servers and storage.

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2
Q

Fibre Channel

A

A high-speed network technology that runs on high-speed optical fibre cables and serial copper cables.

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3
Q

Point-to-Point

A

The simplest FC configuration where two devices are connected directly to each other.

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4
Q

Fibre Channel Arbitrated Loop (FC-AL)

A

Devices are attached to a shared loop. Devices must “arbitrate” to gain control of the loop. Only one device can perform I/O operations on the loop at a time.

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5
Q

Fibre Channel Switched Fabric (FC-SW)

A

Aka fabric connect; Creates a fabric in which data is transferred through a dedicated path between nodes. Addition/removal of nodes doesn’t affect traffic of other nodes. Supports up to 15 million devices.

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6
Q

Fabric

A

A logical space in which all nodes communicate with one another in a network.

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7
Q

Interswitch Link (ISL)

A

The link between any two switches in a switched fabric and enables switches to be connected together to form a single, larger fabric.

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8
Q

N_Port

A

Aka the node port. An end point in the fabric, it is typically a host port (HBA) or a storage array port connected to a switch in a switched fabric.

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9
Q

E_Port

A

Aka the expansion port. A port that forms the connection between two FC switches through ISLs.

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10
Q

F_Port

A

Aka a fabric port. A port on a switch that connects an N_Port.

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11
Q

G_Port

A

A generic port on a switch that can operate as an E_Port or an F_Port and determines its functionality automatically during initialization.

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12
Q

Fibre Channel Protocol (FCP)

A

Provides both channel speed for data transfer with low protocol overhead and scalability of network technology.

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13
Q

World Wide Name (WWN)

A

A unique 64-bit identifier assigned to each device in the FC.

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14
Q

World Wide Node Name (WWNN)

A

Assigned to identify an individual Host or Switch.

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15
Q

World Wide Port Name (WWPN)

A

Used to identify physical ports on a HBA.

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16
Q

FLOGI

A

Fabric login; Between N and F_Port

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17
Q

PLOGI

A

Port login; Between N and N_Port (establish session)

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18
Q

PRLI

A

Process login; Between N and N_Port (share information about upper layer protocol and identifies device as initiator or target)

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19
Q

Zoning

A

An FC switch function that enables node ports within the fabric to be logically segmented into groups and to communicate with each other within the group.

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20
Q

Port zoning

A

Uses the physical address of switch ports to define zones.

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21
Q

WWN zoning

A

Uses World Wide Names (WWNs) to define zones.

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22
Q

Mixed zoning

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A

Combines the qualities of both WWN zoning and port zoning.

23
Q

Full Mesh Topology

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A

Every switch is connected to every other switch in the topology.

24
Q

Partial Mesh Topology

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A

Several hops or ISLs may be required for traffic to reach its destination.

25
Edge Tier
Each switch is attached to a switch at core tier through ISLs.
26
Core Tier
Typically all traffic must traverse/terminate at this tier. All storage devices are connected to the core, and possibly hosts that require high performance.
27
Core-Edge Topology
Edge-tier switches are not connected to each other. Increases connectivity within the SAN while conserving overall port utilization.
28
iSCSI
An IP based protocol that establishes and manages connections between host and storage over IP.
29
Native Topology (iSCSI)
FC components are not required for iSCSI connectivity if an iSCSI-enabled array is deployed. iSCSI initiators are either directly attached to storage or connected through IP network.
30
Bridged Topology (iSCSI)
Includes FC components in its configuration. An external device (gateway/multiprotocol router) must be used to facilitate communication between iSCSI host and FC storage.
31
FC and Native iSCSI Topology
Storage array provides both FC and iSCSI ports that enable iSCSI and FC connectivity in the same environment.
32
SCSI
Command protocol that works at the application layer of the OSI model. Initiators and targets use SCSI commands and responses to talk to each other.
33
Protocol Data Unit (PDU)
The basic "information unit" in the iSCSI environment.
34
iSCSI Name
A unique worldwide iSCSI identifier used to identify initiators and targets.
35
iSCSI Qualified Name (IQN)
Includes the organization domain name and date registered. Enables storage administrators to manage iSCSI devices more easily.
36
Extended Unique Identifier (EUI)
A globally unique identifier composed of the eui prefix followed by a 16-character hexadecimal name.
37
FCIP
A tunneling protocol that enables distributed FC SAN islands to be interconnected over the existing IP-based networks.
38
Converged Network Adapter (CNA)
Provides functionality of both a standard NIC and an FC HBA. Contains separate modules for 10 Gigabit Ethernet and FCoE ASICs
39
Converged Enhanced Ethernet (CEE)
Provides lossless Ethernet and QoS
40
Network-attached Storage (NAS)
A dedicated, high performance file sharing and storage device that enables clients to share files over an IP network.
41
NFS
A client-server protocol for file sharing commonly used on UNIX systems.
42
CIFS
A client-server application protocol based on SMB that enables client programs to make requests for files and services on remote computers over TCP/IP.
43
Unified NAS
Consolidates NAS-based and SAN-based data access within a unified storage platform and provides a unified management interface for managing both.
44
Gateway NAS
The NAS device uses external and independently managed storage to store and retrieve data.
45
Scale-out NAS
Pools multiple nodes together in a cluster. The cluster performs the NAS operation as a single entity.
46
Object Based Storage
A way to store file data in the form of objects based on its content and other attributes rather than the name and location.
47
Object-Based Storage Devices (OSDs)
Devices that organize and store unstructured data in the form of objects.
48
Object
Contains user data and related metadata attributes and has a unique object ID generated using a specialized algorithm.
49
OSD Node
A server that runs the OSD operating environment and provides services to store, retrieve, and manage data in the system.
50
Content-Addressed Storage (CAS)
An object-based storage device designed for secure online storage and retrieval of fixed content.
51
Unified Storage
Consolidates block, file, and object access into one storage solution.
52
Storage Controller
Provides block-level access to application servers through iSCSI, FC, or FCoE protocols.
53
NAS Head
A dedicated file server that provides file access to NAS clients.

Data Management & Storage (5 decks)

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