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[ excerpt from developer's web site with modifications ] The goal is to build a system capable of supporting massive concurrency (on the order of tens of thousands of simultaneous client connections) and avoid the pitfalls which arise with traditional thread and event-based approaches. SEDA is an acronym for staged event-driven architecture, and decomposes a complex, event-driven application into a set of stages connected by queues. This design avoids the high overhead associated with thread-based concurrency models, and decouples event and thread scheduling from application logic. By performing admission control on each event queue, the service can be well-conditioned to load, preventing resources from being overcommitted when demand exceeds service capacity. SEDA employs dynamic control to automatically tune runtime parameters (such as the scheduling parameters of each stage), as well as to manage load, for example, by performing adaptive load shedding. Decomposing services into a set of stages also enables modularity and code reuse, as well as the development of debugging tools for complex event-driven applications.

Sofia-SIP is an open-source SIP User-Agent library, compliant with the IETF RFC3261 specification. It can be used as a building block for SIP client software for uses such as VoIP, IM, and many other real-time and person-to- person communication services.

Suck and blow are simple companion utilities for sending data over a TCP socket. They are easy to use and appropriate when FTP is unavailable, or too much of a hassle, e.g., in single-user mode, from within shell scripts, etc. Blow reads the data from standard input, while suck writes it to standard output. Either program may originate the TCP connection, and the TCP port may be specified if desired.

Virtual Distributed Ethernet is a user-mode virtual network (layer 2) infrastructure. It can be used for network simulations, joining multiple qemu instances together in a shared virtual network, or tunneling over the Internet. Physical hosts can be joined to the virtual network by means of the tap(4) driver.

So scr_ipfm is a script written in php, used to graphically show amount of data downloaded by users in local network. To do that, it uses logs generated by ipfm program (ipfm is available at the address: http://robert.cheramy.net/ipfm/) scr_ipfm features: - sorting by field in, out, host and total - aggregated data of downloaded amount of data - daily, monthly, annually and global statistics

Scribe is a server for aggregating log data streamed in real time from a large number of servers. It is designed to be scalable, extensible without client-side modification, and robust to failure of the network or any specific machine. This is an archived project and is no longer supported or updated by Facebook. Please do not file issues or pull-requests. If you wish to continue to develop this code yourself, we recommend you fork it.

SendEmail is a lightweight, completly command line based, SMTP email agent. If you have the need to send email from a command prompt this tool is perfect. It was designed to be used in bash scripts, Perl programs, and web sites, but it is also quite useful in many other contexts. SendEmail is written in Perl and is unique in that it requires no special modules. It has a straight forward interface, making it very easy to use. It can send atttachements.

If you have an AT&T Wireless, Bell Canada/Bell Mobility, Cellular One, Cingular, Cricket, Sprint PCS, SkyTel, or T-Mobile cell phone or pager, and you want the ability to send SMS messages to it via a command-line utility, this is what you need. All this program requires is a computer with a baseline Perl 5.x installation and web access. NO EXTRA PERL MODULES REQUIRED! How does it work? SendSMS connects to your service provider's web page and pretends to submit a form to their 'Instant Messaging' web page. Currently, AT&T Wireless, Bell Canada/Bell Mobility, Cellular One, Cingular, Cricket, SkyTel, Sprint PCS, and T-Mobile are supported. Users are encouraged to modify the provided templates to add support for any providers who are currently unsupported. Other Service Providers If you are interested in supporting another service provider please try to modify sendSMS on your own. It is not hard at all. Instructions and examples are included in the code, and if you're familiar with the site you're porting to, it takes about 15 minutes. If you get sendSMS working with any other providers' web sites, please email Paul Kreiner [deacon at thedeacon.org] and/or the port maintainer a patch so it can be added to the next release.

Shmux is program for executing the same command on many hosts in parallel. For each target, a child process is spawned by shmux, and a shell on the target obtained one of the supported methods: rsh, ssh, or sh. The output produced by the children is received by shmux and either (optionally) output in turn to the user using an easy to read format, or written to files for later processing making it well suited for use in scripts.

This is the TIC+ heartbeart client for the public dynamic-IPv4 IPv6 tunnel beta test from the SixXS tunnel service provider.