Cloud+ Outline - Module 1

Cloud+

Module 1: Cloud +

Network Storage Types and Configuration

Network Attached Storage - NAS

Server attached to the network, Fileserver

Cheaper storage than SAN

Able to implement with current infrastructure

Offers shared storage over the network

Is the lowest performance

Storage Area Network - SAN

Shared storage access over the LAN

Expensive and requires special training

HBA - Host Bus Adapter

Switches

Vendor specific hardware and software

Configuration takes time setting up

Highest performance

Block-level allocation

Direct Attached Storage - DAS

Directly attached to local PCs

Used by laptops, desktop, and some servers

Protocols

Integrated Device Electronics (IDE)

SATA (SATA III fastest)

SCSI

Not part of design, mostly because they are directly attached to the PC

Accesses and Protocols

Ethernet

Most commonly used in networks

Cheap and easy to implement

Not as fast as Fiber Channel

Limited in distance

Able to use 10 Gbps Ethernet to its potential

Requires a wiring scheme (T568A and T568B)

Fiber Channel (FC)

Common in 10Gbps

Common in WAN’s

Connects Servers to Storage

Topologies

Point-to-point

Arbitrated Loop

Switched Fabric

Used with Long Distance

Internet Protocol (IP)

Operates at the Internet layer of the TCP/IP model

Provides traffic routing

Connectionless unacknowledged protocol

Uses dotted decimal notation or hexadecimal

Example: IPv4 192.168.100.1

Example: IPv6 FE80:0000:0000:0000:0202:B3FF:FE1E:8329

Internet Small Computer System Interface (iSCSI)

Sends packets via SCSI commands through IP networks

Fiber Channel Protocol

Rides over Fiber Channel

Transmits SCSI Commands

Utilizes Hardware to transmit packets

Protocol Offload Engines (POE)

Fiber Channel over Ethernet (FCoE)

Uses Ethernet instead of Fiber Channel

Used to Transmits SCSI commands

Cheaper than Fiber

Uses 10 Gbps Ethernet

Storage Preparation and Accessing

Network Shares

Multipathing

Logical Unit Numbers (LUNs)

Zoning and Lun Masking)

Network Shares

Resources available across the LAN

Appear on a local machine as a drive

With Microsoft OSs SMB protocol

With Linux OSs NFS protocol

Multipathing

Fault tolerant

Creates multiple paths

Uses NICs or HBAs

Multiple means of getting resources

Multiple NICs for connectivity or HBAs from a PC

Logical Unit Numbers (LUNs)

Operate as unique identifiers

Represent a virtual hard disk from a block of allocated storage within a NAS or SAN

Devices that request information are called initiators

Devices that performs the request is called a target

Zoning and LUN Masking

Zoning lets you isolate a single server to a group of storage devs or a single storage dev

Zoning is implemented at the hardware level

LUN masking allows a LUN to be available to some hosts and unavailable to other hosts

LUN masking provides more detailed security than zoning

Chapter Summary

Discussed Network and Direct Storage Types

Discussed Accesses and Protocol

Discussed Storage Preparation and Accessing