NAS vs SAN - Network Attached Storage vs Storage Area Network
Vložit
- čas přidán 19. 07. 2018
- What is the difference between a NAS (network attached storage) and a SAN (storage area network)?
Here is an example of a NAS (affiliate) amzn.to/2VgnRgD
What is a NAS?
What is a Storage Area Network?
#NAS #SAN #NETWORKATTACHEDSTORAGE
I am a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Here is an example of a NAS (affiliate) amzn.to/2VgnRgD
Thank you so much for this video, I am about to have an exam within 2 hours and I managed to understand this topic within minutes. Keep it up, stay blessed!
@@hamiltonfungula63 lol youtube for a cram session? when all else fails remember ABACADABA ;) I am enjoying his animated videos though, nice smooth minimalistic animations instead of a constent view of some crazy tweekers face taking himself way to seriously .
That's very expensive for a 4-bay system.
@@lachiu1 , do you know any in amazon that more cheaper?
@@kanzai12 just diy
I am a manager of a data center and love to ask this question on interviews. Enterprise NAS appliances are designed to be highly available, with redundant controllers, with dual power supplies, and dual network links (often arranged in LACP teams). NAS serves file systems (in the form of shared folders) to end points (typically end user devices) on a corporate network (the LAN). Now, if you want to use NAS for a non traditional workload (such as an NFS export for VMWare data stores), you'd typically devote switches to that use case to avoid the contention with typical end user LAN traffic (when using the same switches as your LAN) described in the video. The reason SAN is marketed as a faster technology has less to do with bandwidth of the different networks (there are 25, 40 and 100 Gb/s ethernet links as well) and more to do with the fundamental differences between NAS and SAN . SANs share raw disk "blocks" (from a storage "target") to endpoints (typically other servers, or storage initiators) commonly in the form of logical disks (LUNs). Block transactions are faster than filesystem transactions because they operate at a lower level and are overall more simple, so block transactions require less overhead. Filesystem transactions occur "on top of" block transactions. Meaning a simple file copy must be process at the file system level as well as at the block level. The filesystem (which is what the NAS serves) in a SAN environment is handled at each independent endpoint, so the SAN target doesn't have to do any of the file system overhead processing, such as tracking and updating filesystem metadata. The filesystem processing overhead is thereby distributed across each endpoint/server. But if you have a single storage target, you could be bottlenecked at the block level if you have several busy servers attached. If you are trying to compare a NAS to a SAN, realize you are comparing apples to oranges. If you want to make apple pie, the apples are probably a better ingredient. But if you want to make orange juice, you'll want to go with oranges. Similarly NAS is designed for some use cases, and SAN for others. Generally speaking - are you trying to share files with end users (NAS), or are you trying to share disks to servers (SAN)?
Great explanation.
the typical examples of tech use:
NAS - home, offices for file sharing
SAN and another distributed file systems operated on block level - Data centers. For example: virtualization like OpenStack, Hadoop clusters, Kubernetes utilize such technology to provision volumes from the available "disk" pool
There no way to compare these 2 tech. as they r created for different purpose.
This is a long reply, but I read it all and it was helpful so just wanted to say thanks.
Pretty spot on, currently supporting one of those RAID Array/SAN/NAS companies. I'd add that a SAN can utilize Fibre Channel as well as 10/25/40/100 to host the access to the LUNs. In addition the LUNs can be provided in multiple channels, with multipathing, a given client/server can have a much more robust connections to the block level storage than the typical single connection to a NAS over a specific protocol. Of course if you have FC or iSCSI you really need to think proper security, there are a large number that don't setup isolated fabrics or two-way chaps.
Generally, your best client performance is going to be a SAN but the costs of your workstations and isolated network switches is going to be higher than just plopping a device that serves up some NAS protocol like smb/nfs. Unless someone needs that kind of performance, such as 4k or 8k video editing, a NAS is usually sufficient.
Thank you
I love how the simple nature of these videos never fails to attract the "Well, actually" tech-geniuses, that then proceed to spew a couple paragraphs of tech-jargon in order to show how smart they are.
Not their fault that the video is wrong in multiple spots and has several misconceptions, for most people it's hard to step out of their specialization and explain something a novice would understand. For example saying that iSCSI is slower than Fibre Channel, when most implementations today of FC are between 8 and 16 Gbps with the higher tier available being 32 Gbps, while Ethernet (iSCSI) is baseline 10 or 25 Gbs with more than a few 40 Gbps and many higher end implementations of 100 Gbps.
@@Torsin2000 😆🤣😂😭😅
@@janX9 I'm glad someone saw what I did there.
@@Torsin2000 yeah, that was good :)
Dude, this is the BEST video I can find on the Internet that explains NAS SAN clearly for a beginner. So many vids are focusing on all those terminologies which is a nightmare for the audience. Yours is straightforward and comes from real-world..
Exactly! Even Professor Messer, with all due respect to him, I could not understand a single thing he was saying in his video. Now this one with animation is much more clear and understandable!
I hope not because this video is not correct.
I just started working for Pure Storage and I am 100% sure that the trainer used this video to write her training material, literally word by word
Lol😂
I don't know how you manage to create videos about the exact things I need to know about. I am extremely thankful for the time you take to make your videos, the animations are fabulous and I can see a lot of time behind. Thank you very much, keep being awesome.
I came back after several years to this video. I am appreciating how it condenses so well and so much good and correct information into just 4 minutes.
Thank you, PowerCert Animations 👍
I love how direct and to the point this channel's explanations are. Another great video. Thanks!
Dude I can’t tell you enough how much I love these animated videos. You helped me learn binary math
You have the greatest videos: simple, yet not primitive, informative, yet not overwhelming.
Dude. This channel is a very good find for me. It explains many tech-related topics and the animation style is amazing.
I hated Network topics but your videos made me love it
Very nice, clear explanation. Good pace and clear voice. Nicely done and much appreciated!
Out of plenty of IT traning videos I have seen or watched, your training videos, Sir, are right on point and your teaching style and animations, pictures, and explanations are comprehensive enough for a six year old to assimilate and understand! Please do not stop making these videos, keep 'em coming! Thank you Sir! ~Respectfully - Anthony
Much appreciated
Exactly how I wanted to know. Simply great explanation in just 4 minutes !
Thanks for your concise, tidy video at the same time with informations enough to grasp the essence of the difference between the systems.
Can't explain simpler than this. Great video for anyone who wants to understand the basics.
i learn much more from videos than from a book. And this channel has some high quality videos
And faster.
SAN is fun to play with. Bought some old IBM equipment, pcie SAS controller cards and cables from ebay. Used two debian servers with 40Gbps infiniband. 60 hours spent. worth it :D
Excellent. Very well illustrated with clear, simple explanations. Thank you.
For visual learners, this channel is a godsend!
Thank you so much for your videos. They’ve helped me pass the A+ 901 Test. Keep up the good work.
Your videos are more easier to understand than anyone else on the web. I really wish you would do a A+ or Network+ course.
Many are not very accurate.
I'm sorry to say that, but this is absolute misconception of these two technologies. In enterprise solutions NAS can be and usually is implemented in a fault tolerance manner. Solutions like EMC Isilon or Netapp C-dot clusters with redundant network connections for instance are as much reliable as SAN devices.
The main difference is about file system and data transfer protocol. In NAS file system is already on the device, it's optimized for data sharing across large amount of clients/servers. while on SAN devices only RAW blocks of storage space are presented to the HOSTs. Cause of that SAN is considered very often as faster solutions with lower latency. which finally brings us to protocols of transporting the data. In NAS it's IP which have significant amount of metadata overhead comparing to FCP used in SAN (also different different acknowledgment algorithms).
Protocols like FCoE or FCIP or ISCSI are intentionally skipped cause we are talking rather about traditional implementation of SAN which is FCP.
Well there are also a lot of other differences like main purpose of use, replication methods and distances, backup techniques and granularity of restore, antivirus implementation and so on. but this is not the topic for you-tube comment ;)
Take care and stay "Storage" focus.
ur mom is a misconception
Explained very well, simple to understand. Thank you.
You guys really are the best of all the cert training videos I wish you did more! Always clear and simple explanations, well done.
Thank you.
An awesome presentation that explains the important differences perfectly... Thank you!!
So many inaccuracies in this article and there are NAS systems that are offer very high levels of redundancy. Remember a NAS can offer either block or file access depending on the applied protocol such as iSCSI, CIFS, or NFS.
The best differentiators are that a SAN offers access to storage arrays using purpose specific protocols such as fiber channel while NAS systems utilize TCP/IP networks to either serve files or encapsulate drive commands. The true differentiator is the use if TCP/IP over purpose specific protocols.
You can certainly discuss the performance and efficiency aspects about the solutions offered, but this explanation isn't defining them properly to start.
I'd say that at the end the main difference is where is the filesystem managed.
If in the server, NAS: you access files
If in the client, SAN: you access blocks
Nowadays both SAN and NAS systems (on their core) provide NAS and SAN capabilities.
@ bro can you just give me a simple explanation with an example of what san is because I'm doing an assessment on it and I'm confused
@@hassii6803 I'd say that SAN/NAS are no longer differentiated by the way they're attached to the network nor their redundancy, fault tolerance or whatsoever. There are storage networks with both modes mixed.
Natural SAN systems can act, and define themselves, as NAS as well, and vice-versa.
What I observe is that, by convention, when a storage keeps the filesystem and serves files (NFS, CIFS,...) is called a NAS.
When it serves blocks so that the client builds and manages its own filesystem on top, is called a SAN.
Of course, for serving SAN mode, fault tolerance and robustness in the network is more critical, but nothing that any enterprise grade NAS cannot provide.
Finally I understand the difference between NAS and SAN. Thanks a lot.
Great Job has done every time on these videos. Keep it up the good work!
What a wonderful and layman explanation you indeed get a concept of SAN from this video 👍👍
Very well illustrated with clear, simple explanations.
Thank u
You guys are fast becoming my favourite channel - thanks a million!
I have one word for you: Synology. I’ve got three, which do so much more than simple storage. I have two in a HA configuration with bonded network links, and a third which runs DHCP, LACP and Home Assistant on Docker. It’s practically an entire server back end.
Thank you, helped a lot. Diagrams make it really easy to understand.
Concise explanation and great animation!! Love it!!
fast , especific , organized , astonishing job !
Simple, great explanation of this difference. Thanks! 👍
Extremely well explained! Thank you!
I'd love more on this bc again, YOU are THE FIRST to explain that the DIFFERENCE; That SANs are architecturally designed around physical redundancy of each hardware element a NAS is otherwise comprised.
This is literally the FIRST EXPLANATION that ever explained the DIFFERENCE. Thank you !!
But, if multiple people use the same "content" ... how doesn't it slow down..?
Obviously they aren't using 1 array per client ... as there has to be economy of scale over a provision of local data. So HOW do you keep it from slowing down based on the number of users..? And if the users can write data -- that must be sync'd across all the discrete arrays, also, which would be doubly taxing -- 1, for the writes (while reading) and 2. because there're likely permission issues ... that's assuming "multiple arrays that're essentially mirrored".
I get that FC can handle the bandwidth with minimal latency, but the drives..?
And parity is a lot of IO overhead... no..?
Also, are SANs always block-level..?
Or can they be object-level..?
Again, thank you! Now though, as I mentioned, I'm interested in how it manages keeping the data sync'd. :)
My NAS is architecturally designed around physical redundancy of each hardware element. I have dual PS, dual CPU, dual banks of RAM, mirrored (RAID1) OS drives, RAID6 remaining drives, even fans are redundant and hot swappable. That's a POOR description of the difference of NAS vs SAN. The redundancy of a SAN is the connection to the data not the hardware. The storage type and communication channels are the difference.
@@ClimberMel So what will happen if a capacitor on your Motherboard blows and takes the whole MB with it? Not so redundant anymore, is it?
Extremely exact and to the point information! Thank you so much...
Fantastic video! I learned so much so quickly. Thank you!
clearly explanations. Nice video for sharing on SAN & NAS
Simple Clear, thank you so much for shairing the video.
Very good nice and clear explanation, love the animation as well :)
Bull's eye! Right on the money 💰. Very crisp and clear in explanation.
Very nice explanation with animation
Please never stop what you're doing. Your videos are so simple to understand that it really helps a lot of people. Keep up the great work!!!
Thanks.
I'm in the middle of studying for my MCSA for Windows 10 and Server 2012 R2, so this really does help!!!
Your all videos are awesome
Thank you so much for uploading such a great content on CZcams
God bless you
Hey man, you are the best, congratulation. I will enjoy so much if you make more video. Thanks
Great video. You made me understand the difference in just 4 minutes! Thanks
That's exactly what I need to watch. Thanks for sharing!
i was just wondering about this. you're the bomb man
Your video saving my tons of time. Thank you so much
Love the Videos, you make more sense than my tutor haha.. But seriously, these are helping so much with my understanding. Now to find good references for my assignments :)
If I look at the word NAS in the mirror, it will say SAN. Same goes for the word SAN.
I shall put this on my resume and apply to a big tech firm, with confidence I will be immediately hired as genius-level lead engineer.
Good luck with that.👍
Absolutely amazing. Thank you.
This video is focused on secondary aspects (and some of them are not even correct). The main difference between the two is that a NAS is efficient for one-to-many topologies (many clients per server, with only the server directly connected to the disks and the clients using slower but cheaper links ), while a SAN is much more efficient (and expensive) for cases where each "client" needs full storage bandwidth and/or direct access (for example in the backbone to share the disk arrays between the servers).
In the second situation a NAS could become a bottleneck with just one or two clients connected to it, but in a SAN no server is in the middle between the "clients" and the disks.
However they are not competing technologies but complementary, as the most common setup is a hybrid of both. NAS servers acting as frontend for networked clients and the SAN as a backbone to share the storage between multiple servers (or few privileged front ends in the need of maximum bandwidth).
Also, the SAN "direct access to the disks" from multiple computers is only the ideal world. In reality each disk array has a raid controller, which is just a specialised Linux server typically embedded in the disk array (except some SDS solutions), so even in a SAN there is indeed a "server" in the middle. But still much more efficient as it basically acts as a SCSI or SAS switch, and it can easily be made redundant thanks to SAS dual connections
Real entreprise NAS has no bottleneck as they have multiple 10/40/100 Gbps network adapters and are behind very capable distribution switches that can handle any load thrown at them. SAN is more a thing of the past now kept alive because many bought them and are not stuck to maintain them - just like IBM Mainframes were.
thanks for the video, you did a great job explaining it in a very simple way :-)
Simple and to the point. Thanks!
Absolutely the best IT materials in the whole universe. There is nothing better than you guys!
I agree with you guys, not his best video, sadly, but others videos from his CZcams series is just amazing.
The key difference between NAS and SAN is that the first one uses file-level and the second one, block-level. Both can be redundant btw.
PD: I know you put a lot of effort into doing these videos, but try to edit this one soon so other people could keep trusting your channel ;)
Cheers!!!
Agreed. That is the main difference. Redundancy, scale etc. can be matched by either NAS or SAN.
I like your videos. Thank you for providing them!
Once again a wonderful video! Thanks a lot!
Good video. :) HBA network cards with fibre channel cables are used in SAN. Tape Library devices are designed to use SAN but they are really expensive.
SAN can be a network solution for backup purposes or application storing data (Databases of Exchange or SQL).
Very useful video, thank you so much!!
Perfectly explained. Exactly how I wanted to know bout SAN vs NAS. Can you do a video on VSAN?
Great video man. Thank you for your information.
Engraçado que estes vídeos me ensinaram mais do que a faculdade de análises de sistemas onde o professor um nerd , brocha e frustrado levava um ano para uma explicação simples que ele complicava ao máximo e no restante do tempo falava de sua vida pessoal. Parabéns!
This is great information! Thank you for this!
Thank you... That was very informative.
Thanks for interesting information.
Thanks for this presentation!
very good accent, i'm french and i understand everything , thanks a lot !!!! i do understand very well now ! and these explications are very nice !
On est ensemble
This was very helpful, thank you!
Thanks for pretty detailed tutorial
Okay, I have just 1 question to ask: Why can’t others (CZcamsrs) make and explain videos like yours? Your termination is just so easy to follow. You don’t seem to be going on and on. Believe me, I value you’re videos. Thank you ever so kindly. 🙏🏻
Unfortunately, this video is not good, and in fact it's very misleading. Please refer to my other comments under this video.
@@danielwoosewicz6556 hello Sir. I have been looking for your other comments for a while but I can't find it. I even 'Ctrl F' the webpage your name. I think there is too many comments to load them all. Could you please kindly tag me in your comment where you explain the misinformation. Thanks 🙏🙏
Good vid with great presentation.
It helps me a lot, thanks.
Good animation & information
Love your channels bro , keep it up
Appreciate it!
Absolutely the best explanations on IT concepts on CZcams. Thank you for your dedicated work to provide easy to understand concepts on complex issues.
To the point explanation. Thank you very much.
thanks so much man,,, love your videos
Very helpful for my knowledge and assignment😀👏
i love your videos...please keep posting
awesome explanation !!!
Thanks to you I finally understands the difference
Really love your video teaching and animation man...
Please make a video of VSAN aswell
Excellent networking YT channel!!! Immediate sub.
very nice explanation sanks
Excellent Information Video.
Fantastic video!
This help a lot.Thanks!
There are lot of NAS out there as an example Isilon (EMC product) that supports redundancy even if node goes down there wont be any affect on NAS even if whole cluster goes down you can use superna eye glass for disaster recovery purposes to replicate/mirror data.
Keep up the great work bro..... 👍👍👍👍
Didn't know 128Gbit/s FC existed. But great video, as always!
Thank you so much! Great vídeo!
Thanks as always 😊
I keep a SAN at home. Xtreemfs, 2 nodes at mom's house and 3 nodes at my own, both of those include the front end.
Both can do file level and block level access btw.
Too good explained Sir ✌