STORAGE AREA NETWORKS

Amin Kazempour Long 20079980 Yunyan XU 20067690

CSIT 5600 PROJECT

Agenda

Storages types SAN SAN Components SAN Benefits & Applications SAN Technologies SAN Hardware SAN Software and Some Protocols Q & A?!

Storages in terms of Sharing DAS (Direct Attached Storage)

Blocks of Storage Only belongs to one end system.. Example: Physical Hard Disk

NAS (Network Attached Storage) File Sharing Files are shared between several nodes Example: NFS (Network File System)

SAN (Storage Area Network) Block Storage Sharing Example: iSCSI, FC,…

SAN Definition

SAN is a dedicated network that provides access to consolidated, block level data storage.

Topology

Components:

1)Server: file & print server, email server, database server; connect to SAN by adaptors;

2)SAN infrastructure: Adaptors and Switches; 3)Disk Storage: disk(or RAID)arrays; 4)Tape storage: any disk storage can be

connected to a tape library via the channel, for bake up and restore.

5)Management software: configure and monitor.

Main Devices

SAN Serverwith disk arrays(EMC Clariion)

SAN Switch (HP)

Benefits

Centralizing data storage operations (extension, backup)

Efficient on data transfer Dramatically reduce the management

costs Reduce complexity of environments Common technology Interoperability Large amount of users

Applications

ISPs, Banks(core part--FC SAN, other parts--IP SAN) Commercial solutions & products1. Hardware—EMC(33%) platform Symmetrix, ESN

management software2. IBM—server(MSS2106), storage(ESS),

connection(FC switch), management software(Tivoli) and service

3. HP—Equation storage framework4. Sun—Sun StorEdge T3+Sun Stor Edge internet FC

switch5. Brocade—Intelligent Fabric Service-Oriented

Architecture

SAN Two Main Technologies

SAN can be implemented in two different networks:

iSCSI (TCP/IP)

FiberChannel

iSCSI (TCP/IP) VS FiberChannel

Description FC-SAN IP-SAN

Rate 1GB, 2GB, 4GB, 8GB, 16GB 1GB, 10GB (Expensive)

Architecture Fiber network, HBA card Use IP network (TCP/IP), NIC

Transfer distance Limited by fiber transfer Theoretically no limitation (More flexible)

Management & maintain Technology and management are complex

Easy as IP network device

Compatible Weak compatibility with other FC-SANs

Compatible with other IP-SANs

Cost Higher(buy FC-switches, HBA card, library&trainee)

Lower

Anti-disaster (tolerance) Hardware & software cost a lot Can resist to local and remote disaster and cost less

Security Great, as it is isolated from the IP Network

Lower, secondary considerations required for security

Hardware—Connections

FC connection FC HBA FC Switch FC Cables

TCP/IP connection GB NIC TCP/IP Switch UTP or other TCP/IP medias

Software—Protocols FCoE

FCoE--Fiber Channel over Ethernet FC strength TCP/IP flexibility Cost reducing

Software—Protocols FCIP(Back up to Long Distance) FCIP--Entire Fiber Channel Frame Over IP Back up data in another city (FC IP)

Software – FAST & FAST Cache

FAST Cache Technology Main memory is the fastest but expensive Cache the MRU pages in main memory

FAST = Fully Automated Storage Tiering Brought by EMC SANS FAST Technology Fastest Hard Disk due to highest frequency of usage Hard Disks

Nand (SSD[RAM technology]) SAS--Serial Attached SCSI SCSI: Small Computer System Interface SATA IDE (Obsolete)

Software—FAST Technology(EMC Property, Advanced Technology)

Active data goes to the highest performance tier, and inactive data to the lowest-cost, highest-capacity tier.

Fast algorithm Steps: Statistics Collection

Hot and Cold data slices Analysis

Rank the slices Relocation

Relocate the slices todifferent tires due to their ranks

References

EMC Fast VP For Unified Storage Systems, EMC White Paper, October 2011.

EMC Fast Cache, EMC White Paper, October 2011. Pros and cons of Fiber Channel and Ethernet storage, Scott

Reevs, March 2013. My First SAN solution guide, HP, April 2004. What is the difference between SAN, NAS and DAS,

http://www.Serverfault.com

Q & A ?

THANK YOU