Easily integrate a cross-platform chat system in your apps that scales to any amount of concurrent chats. Provide your users with a high-quality voice chat that simply works. No matter how big your community grows. Build any kind of multiplayer game and create your own fully authoritative servers.
Host and run them in your own premises. Photon and its clients are using a highly optimized binary protocol to communicate. It's compact, yet easy to parse. You don't have to know its details, as it is handled behind the scenes. Just in case you want to know it anyways, this page describes it. The Photon binary protocols are organized in several layers. On its lowest level, UDP is used to carry the messages you want to send. Within those standard datagrams, several headers reflect the properties you expect of Photon: Each eNet command carries our messages: An operation, result or event.
Those in turn consist of the operation header and the data you provided. Below, you will find tables listing each part of the protocols and its size. This should give you an idea of the traffic needed by certain content you send. If you wanted to, you could calculate how big any given message becomes.
Without properties, this is an operation with a single parameter. The "operation parameters" require: The string "somegame" uses 8 bytes in UTF8 encoding and strings require another 3 bytes length and type information.
The parameters are wrapped into an operation-header, which is 8 bytes. The operation and its header are wrapped into eNet's "send reliable" command as payload. The command is 12 bytes. Let us assume the command is sent when no other commands are queued. The eNet package header is 12 bytes. Quite a bit, compared to the 46 bytes so far. Sadly, this can't be avoided completely but our aggregation of commands can save you a lot of traffic, sharing those headers. The server will have to acknowledge this command.
The ACK command is 20 bytes. If this is sent alone in a package, it will take up 40 bytes in return. Enet Channels allow you to use several independent command-sequences. In a single channel, all commands are sent and dispatched in order. If a reliable command is missing, the receiving side can't continue to dispatch updates and things lag. When some events and operations are independent from one-another, you can put them im separate channels.
Also, Thrift is a generic framework, and we believe that a transport specifically tailored for Cassandra might bring additional control and maybe performance. This has led to the new binary protocol that will be introduced by Cassandra 1. This protocol is a custom one and has been designed specifically for Cassandra and more precisely for CQL3 that is, it only support CQL3. Amongst others, it offers the following features:. Interested parties can find the full specification for this protocol for Cassandra 1.
So what if you want to give that new protocol a try? First, you need a version of Cassandra 1. Then, you need to activate the binary protocol server. Keep in mind that this protocol and its implementation are brand new. For that reason, the binary protocol server is not started by default only the thrift server is. Lastly, you need a client driver that support this new protocol.
One such driver that is still beta itself is the Java Driver that DataStax open-sourced a few days ago. We believe this new protocol is a good addition to Cassandra and it already offers a number of advantages asynchronicity, notifications, But I have two question: How many requests can each connection handle at the same time in new protocol?
In notification feature if a client add a new column to an existing row, will server notify client about adding new pair? But from the protocol point of view, we could allow notification for any kind of events, which means we may have data-related notification in the future. Shahryar the binary protocol itself is obviously agnostic to any specific API. As said above, the only java driver for the binary protocol currently is probably the new Datastax Java driver that is still in beta. Unfortunately I need a.
Cassandra Sharp updated 5 days ago https: FluentCassandra updated 2 days ago https: I would like to take advantage of a binary protocol supported in Cassanda 1. I openned an issue for cassandra-pdo because CQL3 composite keys dont work: There is a sequence id in the protocole which allows you to reconcile the replies with the request.
By the way its sequence id is not limited to it is an int Why limiting the number of simultaneous request on a single connection to only ? Nonetheless, at the top level, thrift still exposes a purely synchronous RPC based API, which makes doing asynchronous client calls more awkward you still have to occupy one thread per-client. Not sure what made you think that. See the protocol specification.
And no, data is not framed on disk, or at least not framed in the sense of the native protocol, but I do fail to see how that is relevant in any way? Sylvain why did you decide to implement a new protocol from scratch, rather than trying to improve Thrift to meet your needs? Was that a lost cause?