Notices

Overclockers Forums > Software > Internet, Networking, and Security
Internet, Networking, and Security Networking and Viruses/Malware trouble. Get the answers here.
Forum Jump

NAS AND SAN storage

Post Reply New Thread Subscribe Search this Thread
 
 
Thread Tools
Old 02-09-06, 10:15 AM Thread Starter   #1
gorilly
Member

 
gorilly's Avatar 

Join Date: Jul 2004
Location: uxbridge, London, UK

 
NAS AND SAN storage


i know this could probablly go in the storage section but i feel its more to do with networking.

i've been looking all over the web for a good guide / explanation of NAS (network attached storage) and SAN (storage area network) but couldnt find one anywhere.

i have a close contact at dell advanced server support and was asking him to explain it to me, expecting a 2 line email back but what i actually got is fantastic.

i just thought i would put it on here for anyone else who is looking for answers!

i would credit him but maybe dell wouldnt like that as this is more of a personal opinion...


Quote:
No problem at all Michael,

I've been looking for a NAS v SAN document to send you but couldn't find any external facing docs that solely deal with that distinction. So, here it is: ;-)

NAS - Network Attached Storage

All systems which connect to the NAS system do so through the public network (ethernet etc). This is an easy solution to implement and is normally just a case of racking the system, connecting it up, configuring it on the network, creating your shares and away you go. It's basically adding another dedicated file server onto the network with extra storage. But there are other benefits, Storage Server 2003 comes with all the OS clients installed so Unix/Linux/Netware/Apple/Windows users can all access the storage. Also, there are no limits on the amount of clients that can attach to the NAS system so you do not need to worry about CAL's. Finally, the NAs systems have a web based management utility where you can configure the system over the network without needing to know Windows inside and out. (Good for Linux people who have strong opinions on using Windows ;-)

SAN - Storage Area Network

A SAN is where a dedicated high speed network interconnects the servers and storage and is not part of the public network. Generally, SAN's are fibre based which provide higher speed/bandwidth then ethernet. This enables System Administrators to consolidate their storage from multiple servers onto one storage system, which means less configuration, easier to manage and simpler backup strategies. However historically SAN implementations were a lot more expensive than NAS due to the cost of fibre hba's, switches, cabling etc etc.


The AX100 mixes SAN/NAS technology, it comes in two flavours iscsi and fibre. The iscsi and fibre relate to how the AX100 connects to the network. To deploy a fibre AX100 (fibre=speedier/higher bandwidth) you would need to buy Fibre hba's for each server which will be using the server, Fibre switch (Not cheap!) and Fibre cables. Thats without mentioning backup solutions.

The AX100i uses the iscsi protocol which means it can use existing Ethernet networks to attach to the servers. However, the ethernet switch must be a gigabit one and cat5e cables used, Dell also recommends that a dedicated gigabit switch is purchased and dual nics are installed in each server. This is so the data traffic between the ax100 and server is not on the public network which could reduce performance. (Though it is possible to use the AX100i on the same network as clients) This makes the AX100i a cheaper option as gigabit ethernet technology is cheaper than fibre. Finally, it is also possible for multiple sites to use the AX100i over a WAN once the network configuration allows it.

There are documents on the AX100 specs located at:
http://www1.euro.dell.com/content/pr...=uk&l=en&s=pad

PV745n documents:
http://www1.euro.dell.com/content/pr...=uk&l=en&s=pad

Does this help at all? (I think I should have been a sales rep... ;-) In the end, the main considerations come down to:

a) How much storage do I need (including a % extra for future proofing for a couple of years)?
b) What performance level do I need?
c) Any specific business requirements
d) How much can I afford?


If you need to get a quote for the AX100 for comparison let me know because, I think a Rep would need to issue one as the website doesn't at the moment. It may also be necessary to consider changing your backup solution as well, if all your data is going to be centralised.
gorilly is offline   QUOTE Thanks
Old 02-09-06, 03:29 PM   #2
CyberFed
Member

 
CyberFed's Avatar 

Join Date: Nov 2001
Location: Orlando Florida UCF Alumni! C/0 2005 Computer Engineering

10 Year Badge
 
Thanks for the good read I just recently configured a 280 gig scsi fibre channel 4 hard drive SAN on an IBM server at work...really neat stuff...talk about a workhorse!

__________________
I couldn't begin to list my computer specs here..I work as a systems engineer for NASA just imagine the toys I get to play with.. :)
CyberFed is offline   QUOTE Thanks
Old 02-09-06, 09:06 PM   #3
Benvanz
Member

 
Benvanz's Avatar 

Join Date: May 2005
Location: Victoria, BC, Canada

 
Good read Thx

__________________
Go bug some other sig!
Benvanz is offline   QUOTE Thanks
Old 02-09-06, 09:15 PM   #4
Thespis377
Member

 
Thespis377's Avatar 

Join Date: May 2002
Location: Starkville, MS

 
SANs are extremely cool. We have several SANs on campus. I help manage 2 of them. Mirrored systems. We have 2 of these: Sun StorEdge 9970 The biggest difference between SAN and NAS is the speed of data transfer and seek time. A NAS is limited by the ethernet pipe, while a SAN is limited by almost nothing. At 15GB/s data transfer....it's very fast. Plus with the large amounts of cache in the system, you can get seek times down to 1ms. We also have several of these: ATABeast for systems that require large amounts of disk space and for our backup server to write to disk before writing to tape....kind of like a cache for tape. Very cool stuff. Wish I could afford either of these for my home. 9-)
Thespis377 is offline   QUOTE Thanks
Old 02-10-06, 12:25 AM   #5
Ebola
Senior Toilet Scrubber

 
Ebola's Avatar 

Join Date: Jan 2001
Location: Rosemount, MN

10 Year Badge
 
I've done windows 2003 (sql2000) clustering with an ax100. If you need any info on it let me know. Its been awhile but I think I could walk you through it. And your right, it is almost a networking issue. I think I used 10 IPs for all of the hardware in my cluster and virtuals.

BTW the AX100 runs windows XP embedded. Its web interface is kind of crappy too. Your linksys routers have a better looking interface.

__________________
[Cythraul Design]
Ebola is offline   QUOTE Thanks

Post Reply New Thread Subscribe


Overclockers Forums > Software > Internet, Networking, and Security
Internet, Networking, and Security Networking and Viruses/Malware trouble. Get the answers here.
Forum Jump

Thread Tools Search this Thread
Search this Thread:

Advanced Search


Mobile Skin
All times are GMT -5. The time now is 03:10 PM.
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
You can add these icons by updating your profile information to include your Heatware ID, Benching Profile ID or your Folding/SETI profile ID. Edit your profile!
X

Welcome to Overclockers.com

Create your username to jump into the discussion!

New members like you have made this the best community on the Internet since 1998!


(4 digit year)

Why Join Us?

  • Share experience
  • Max out your hardware
  • Best forum members anywhere
  • Customized forum experience

Already a member?