Hybrid Clouds: are we there yet?
by Johan De Gelas on October 18, 2010 2:05 PM EST- Posted in
- IT Computing
Building a bridge between two datacenters is pretty easy and mature. In fact many of you do this on a daily basis: you make a VPN connection between your own network and a remote network. Site to site VPNs have been available for quite some time now. And that is exactly what Amazon offers with their VPC product.
Howie Xu, R&D Director from VMware, presented VMware’s vision concerning the future of networking. VMware virtual switch was the first step. The vswitch offered portgroups which allowed you to separate storage, console and VM networking from each other. A vswitch was always limited to one server, one host.
In vSphere 4.0, the distributed vSwitch was born. In 4.1 with VLANs and traffic shaping was introduced. Distributed switches can span several servers, making it easier to configure networking for a complete cluster instead of configuring vSwitches on different hosts.
Click to enlarge
The next step would be to creat a Distributed Virtual Network, a virtual networking chassis. This vChassis would be able to create a distributed network from layer 2 to 7 accross two or more datacenters.
Unfortunately, the presentation did not give any insight on how this will be accomplished.
Facebook
Twitter
RSS
26 Comments
View All Comments
HMTK - Tuesday, October 19, 2010 - link
Well you don't NEED cutting edge storage for a lot of things. In many cases more cheap(er) machines can be interesting than fewer more expensive machines. A lower specced machine in a large cluster of such machines going down might have less of an impact than a high end server in a cluster of only a few machines. For my customers (SMB's) I prefer more but less powerful machines. As usual YMMV.Exelius - Wednesday, October 20, 2010 - link
Very rarely do people actually need cutting edge. Even if you think you do; more often than not a good SAN operating across a few dozen spindles is much faster than you think. Storage on a small scale is tricky and expensive; storage on a large scale is easy, fast and cheap. You'd be surprised how fast a good SAN can be (even on iSCSI) if you have the right arrays, HBAs and switches.And "enterprise" cloud providers like SunGard and IBM will sell you storage, and deliver minimum levels of IOPS and/or throughput. They've done this for at least 5 years (which is the last time I priced one of them out.) It's expensive, but so is building your own environment. And remember to take into account labor costs over the life of the equipment; if your IT guy quits after 2 years you'll have to train someone, hire someone pre-trained, or (most likely,) hire a consultant at $250/hr every time you need anything changed.
Cloud is cheaper because you only need to train your IT staff on the cloud, not on whatever brand of server, HBAs, SAN, switches, disks, virtualization software, etc... For most companies, operating IT infrastructure is not a core competency, so outsource it already. You outsource your payroll to ADP, so why not your IT infrastructure to Amazon or Google?
Murloc - Tuesday, October 19, 2010 - link
I love these articles about IT stuff in large enterprises.They are so clear even for noobs. I don't know anything about this stuff but thanks to anandtech I get to know about these exciting developments.
dustcrusher - Tuesday, October 19, 2010 - link
"It won't let you tripple your VM resources in a few minutes, avoiding a sky high bill afterwards."Triple has an extra "p."
"If it works out well, those are bonusses,"
Extra "s" in bonuses.
HMTK - Wednesday, October 20, 2010 - link
I believe Johan was thinking of http://en.wikipedia.org/wiki/TripelJohanAnandtech - Sunday, October 24, 2010 - link
Scary how you can read my mind. Cheers :-)iwodo - Tuesday, October 19, 2010 - link
I admit first i am no expert in this field. But Rackspace Cloud Hosting seems much cheaper then Amazon. And i could never understand why use EC2 at all, what advantage does it give compare like RackSpace Cloud.What alert me was the cost you posted up, which surprise me.
iwodo - Tuesday, October 19, 2010 - link
Arh.. somehow posted without knowing it.And even with the cheaper price of Racksapce, i still consider the Cloud thing as expensive.
For small to medium size Web Site, Hosting still seems to be best value.
JonnyDough - Tuesday, October 19, 2010 - link
...and we don't want to "be there". I want control of my data thank you. :)pablo906 - Tuesday, October 19, 2010 - link
Metro Clusters aren't new and you can already active active metro clusters on 10MB links with a fair amount of success. NetApp does a pretty good job of this with XenServer. Is it scalable to extreme levels, well certainly it's not as scalable as a Fiber Channel on a 1GB link. This is interesting tech and has promise in 5 years. American bandwidth is still archaically priced and Telcos really bend you over for fiber. I spend over 500k /yr on telco side network expenses already and that's using a slew of 1MB links with fiber backbone.1GB links simply aren't even available in many places. I personally don't want my DR site 100km away from my main site. I'd like one on each coast if I was designing this system. It's definitely a good first step.
Having worked for ISP's I think they may be the only people in the world that will find this reasonable to implement quickly. ISP's generally have low latency multi GB link Fiber Rings that meshing a storage Fabric into wouldn't be difficult. The crazy part is it needs nearly the theoretical limit of the 1GB to operate so it really requires additional infrastructure costs. If a Tornado, Hurricane, or Earthquake hits your datacenter 100km away will likely also be feeling the effects. It is nice to replicate data with however in hopes that you don't completely loose all your physical equipment in both.
How long lasting is FC anyway. It seems there is a ton of emphasis still on FC when 10GB is showing scalability and ease of use that's really nice. It's an interesting cross roads for storage manufacturers. I've spoken to insiders at a couple of the BIG players who question the future of FC. I can't be the only person out there thinking that leveraging FC seems to be a loosing proposition right now. iSCSI over 10Gb is very fast and you have things like Link Aggregation, MPIO, and VLANS that really help scale those solutions and allow you to engineer some very interesting configurations. NFS over 10GB is another great technology that makes management extremely simple. You have VHD files and you move them around as needed.
Virtualization is a game changer in the Corporate IT world and we're starting to see some really cool ideas coming out of the big players.