While software defined networking has proven its value, SynchroKnot has taken software defined networking to a whole new dimension with Spatial Defined Networking.
Spatial Defined Networking is made up of SynchroKnot's core networking component called Satellite Tree Protocol, which is an enhancement to the IEEE standard [ 802.1D (1998|2004), 802.1W ] while keeping the core semantics in place.
This simplistically means, you can use any commodity X86_64 Desktop/Workstation/Server/Embedded device and connect them to eachother.
There is no need to purchase physical or virtual switches and routers or any of their licenses [Eg. Cisco, Juniper etc].
Satellite Tree Protocol is the core networking component of the SynchroKnot Cloud Computing and Data Center Decentralization software.
In brief, the SynchroKnot software transforms any server, workstation, desktop or embedded device into a decentralized cloud or data center [data decenter].
There are various demonstration videos depicting its workability, performance, security and scalability on synchroknot.tokyo
Here are some of the highlights of the SynchroKnot Satellite Tree Protocol:
■ Enhancement to the IEEE standard [ 802.1D (1998|2004), 802.1W ] while keeping the core semantics in place.
Standard Layer 2 Ethernet remains pure, untouched and unmodified without frame encapsulation, additional headers or other forms of tinkering.
■ Improving upon and applying the globally accepted IEEE standard found in network switches onto Spatial Fabric Satellites. Network is no longer a separate complex component with separate hardware and licenses, but is now built right in with nothing extra that needs to be done.
■ Depending on your need and/or requirement, you now have a logical straight-forward option and ability to eliminate Top-of-the-Rack, Spine, Leaf, Edge, Aggregation and Core Switches & Routers, along with their respective licenses.
■ Large-Scale, High-Performance Layer 2 Environment with a single instance of Satellite Tree Protocol with support for single, double and triple stacked VLANS.
■ Does not cause a network-wide outage on failure of link(s) as experienced with regular Spanning Tree Protocol [ STP ] and Rapid Spanning Tree Protocol [ RSTP ].
■ Recovery from failure is, in most cases, in sub-milliseconds to about 1.5 seconds depending on the nature of failure [ single / multiple links ] and the distance from the point(s) of failure. Traffic that does not traverse the path where failure occured is generally not affected by the failure at all.
■ Intelligent Layer 2 Optimized Cost Multipath forwarding logic based on local intelligence chooses the best link with the shortest optimal path in normal operation, congestion and on link failure.
■ Multiple ANY-to-ANY Layer 2 routes allow you to add and remove hardware transparently without turning off whole or sections of the network, as experienced with switches and routers in networks today.
■ Zero Configuration.
How about never having to endure countless hours of pain configuring, managing and maintaining physical Ethernet ports, trunking and ACLs and other aspects? How about plugging one end of Ethernet cable into ANY physical port of a commodity hardware and connecting the other end to ANY physical port of another commodity hardware and that's it - nothing to do.
■ Get the best of cost, low latency, bandwidth and performance in multiple directions, not just East-West / North-South with the help of SynchroKnot Multi-Dimensional topology.
■ SynchroKnot Multi-Dimensional topology is a dynamic mix and integration of proven network topologies which are used as a primary backbone in High Performance Computing and Supercomputing. These include Ring, 2-D, 3-D and many other custom topologies optimized for cost, performance and simplified cabling.
■ Single-length cable for the entire cluster. No long haul cables. No expensive power-consuming optical cables.
■ Very low CPU usage.
Apart from all these features, there are multitude of extra security features to choose from on top of the Satellite Tree Protocol.
$ rails routes
Prefix Verb URI Pattern Controller#Action
users POST /users(.:format) chats#create
new_user GET /users/new(.:format) users#new
user GET /users/:id(.:format)
users#show
DELETE /users/:id(.:format)
$ rails routes
Prefix Verb URI Pattern Controller#Action
users POST /users(.:format) chats#create
new_user GET /users/new(.:format) users#new
user GET /users/:url_token(.:format) users#show
DELETE /users/:url_token(.:format)
Macの場合、ターミナルを開いて、vi /etc/hostsで設定ファイルを開きます。人によっては書き込み権限がなく、sudo vi /etc/hostsにする必要があるかもしれません。
##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
##
127.0.0.1 localhost
127.0.0.1 mysite-onaga.com one.mysite-onaga.com
255.255.255.255 broadcasthost
::1 localhost
### routes.rb ###
# mysite-onaga.com
constraints subdomain: '' do
get 'home/zero'
end
# one.mysite-onaga.com
constraints subdomain: 'one' do
get 'home/one'
end
After discussion and consideration, we picked 1, _2... as numbered parameters. I investigated replaced examples, the current @1 etc. are too confusing with instance variables. So I picked underscore for numbered parameters (a la Scala). We didn't choose Scala's default parameter (), because it is confusing from my view.
The whole parameter (e.g. |a|) can be captured using _0. The _0 part is kind of compromise, but I think it's acceptable.
The bare _1 etc. in the current code will be warned. You can use those identifiers as local variable names or method names, but they are not recommended from 2.7 and later. And they might be prohibited in the future.
After experiments, |> have caused more confusion and controversy far more than I expected. I still value the chaining operator, but drawbacks are bigger than the benefit. So I just give up the idea now. Maybe we would revisit the idea in the future (with different operator appearance).
During the discussion, we introduced the comment in the method chain allowed. It will not be removed.
