![]() ![]() |
||||
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
||||||||||||||||||||||||||||||||||||||||||
![]() |
![]() |
![]() |
![]() |
![]() |
||||||||||||||||||||||||||||||||||||||
|
![]() FEATURES Easy installation and Management GUI DNEWS News Server includes an intuitive graphical user interface (GUI) for Windows which makes setting up and managing the server very easy, even if you have little or no current knowledge of Internet News. Even without the GUI, DNEWS News Server set up and management is simple. Performance - Receiving News Feed - Full Feeds The specially designed database allows DNEWS to easily take a full feed even on relatively limited hardware. Several customers have reported a jump by a factor of up to 3 times when upgrading to DNEWS from other software, but this will depend very much on 'what' bottleneck was limiting your system previously. Performance - Receiving News Feed - Dynamic Pull Feeds This unique feature allows the DNEWS News Server to dynamically and automatically only pull news groups which are actually read on your server. This unique advance can result in enormous savings in disk space and bandwidth while further enhancing performance. This dynamic sucking feed is particularly helpful for small sites and workgroups, allowing a group of one hundred users to be supported on as little as 100-200 MB while retaining all the advantages of a full feed. Single-user feeds can use as little as 5 MB. The Dynamic Pull(sucking) feed is Unique to the DNEWS server and is designed to provide a better solution for the large number of smaller sites and companies that want the benefits of running a local news server and a 'full feed' but have limited resources. The dynamic sucking feed option allows DNEWS News Server to dynamically and automatically only suck news groups which are actually read on your server. While allowing users all the choice provided with a full-feed within the organizations policy. The dynamic feed option is generally far more efficient alternative for servers with 500 users or less. Often the employment of the Dynamic sucking feed can avoid the need to invest in a faster more expensive line, additional and hardware and memory that would otherwise be necessary to use a full feed. DNEWS currently allows up to fifteen separate dynamic feeds to be set up. Both suck and full feeds can be set up together if desired. Performance - Sending News Feeds - Full Feeds There are several ways a news server can send a feed to another server.
With the standard feed the server periodically reads all the new news from its disk and sends it to the downstream server. With a live feed the server passes on the full feed it is receiving directly to the downstream server, here there is a MAJOR saving because the articles do not get written and then read from disk. A server may be using both methods of sending feeds at anytime. With DNEWS News Server both the standard and live feeds options are built in and configuration is straight forward . The DNEWS options are advanced and feeds are simple to setup , the backfeed system (which allows the server to resend news to the downstream server if it is unable to take it immediately) is also built in. The DNEWS live feeds option allows you to specify multiple channels to send a feed to a specific server, this is important if the downstream server doesn't take streaming as it otherwise could not take news fast enough to support the use of a live feed. Additionally DNEWS uses streaming wherever possible. Streaming can increase the speed with news can be transmitted by a significant factor where the link between servers has a slow return time. The System is designed to be run unattended DNEWS was designed to run unattended with virtually no ongoing management time. This is achieved through various intelligent and intuitive features that can be set by the system administrator. DNEWS News Server allows expiration rules to be related to the number of items in a group, making low volume groups more useful. Expiration requirements intelligently adjust according to the available disk space, making the system much more stable than other servers under a large influx of news and more flexible under a low load. The Server remains stable even where problems with downstream feeds arise detecting and dealing with the consequences of these problems automatically. DNEWS emails a daily report to the administrator detailing whats been received from and sent to each feed, how the expire ran, disk space used and available etc. Where the dynamic feed is used the server dynamically reflects the changing reading habits of users without any manual intervention. Spool area DNEWS works well with 100 Gig or more of spool storage . Disks can be added at any time without having to calculate which part of the news tree to place on which disk. DNEWS will support 500 concurrent users on a single machine (more is possible but we for good response we recommend around 500 is a sensible limit), the RAM usage per user is very low. A hundred connections would be possible on a machine with 96MB of RAM and 300 connections on 128 MB of RAM. DMULTI is a configuration for running multiple DNEWS processes on a single server utilizing a Master Slave architecture and allows you to get more out of your machine. With DMULTI you start 2-5 DNEWS processes, each one dealing with 50-400 concurrent users, this allows it to scale well and make use of multiple CPU's etc. DMULTI will start to be worthwhile when you have more than about 50 concurrent news readers on your system, and/or if you have people reading 24 hours a day and the expire process is causing performance problems. Generally it will give reasonable results if you have sufficient memory and multiple disk drives. If you have more than 200 - 500 concurrent users it is recommended that you configure your server with the DMULTI option. Because, disk IO is often a bottleneck we recommend multiple servers after a certain point, (around 500 concurrent users as a rough guide) for best performance and this gives the added advantage of 100% hardware fail over for emergencies. DNEWS provides Flexible Access Restrictions plus advanced security features: Reading and Posting Access can be given separately to different users and selections of news groups. For NT and Unix users DNEWS allows authorization via the system user database. DNEWS provides two types of connection limiting; you can limit the number of users connecting from a specific sub net, or the number of concurrent users connecting from a specific ip number, within a sub net. DNEWS supports PGP Authentication is a feature missing from many of the other commercial news servers. DNEWSWEB Supports the standard SSL employed by secure web servers. This allows you to create secure News/discussion groups utilizing the standard security and access controls you employ with your secure web server. Email confirmation of posts DNEWS News Server can be configured to send email confirmation to a user as it sends a posted item up to a main news server. This gives users a clear record of a posted item and its successful transfer onto the Internet. With your own news server, you can have complete control over your own 'local' news groups. Performance DNEWS gives very high performance. This is due to the advanced database which was specifically designed for news item storage. NNTP streaming extensions are built in, this can double or triple large feed throughput particularly over slow links. News items are not stored in individual files Items are stored in a database this has several advantages over previous systems which add to performance:
The XOVER extensions which speeds up news readers is implemented in software removing the need for a separate 'xover' database, this is only possible because the high speed database built into DNEWS News Server. Configurable without recompiling DNEWS News Server can be configured without recompiling and all the configuration scripts have been simplified wherever possible. Binaries available, you don't have to build it yourself As dnews comes pre compiled you don't have to worry about building it yourself for any platform, we've already done it. If you are worried about the power hackers may have on your news server (and you should be) then you definitely need this feature which is missing from almost all other commercial news servers. Adding PGP authentication to control.conf The system is commercially supported Technical support is available via E-Mail for help with installation and management. Get an experts opinion and advice on a solution to any problem. DNEWS News Server is compatible with existing standard protocols, to ensure the widest possible range of communications and collaboration. It uses the standard Network News Transport Protocol (NNTP) and runs on any TCP/IP network. As a result DNEWS News Server integrates with the USENET news groups and is inter-operable with any NNTP based newsreader. DNEWS News Server also supports the use of standard MIME types and image formats, including GIF and JPEG. Multimedia Attachments Because DNEWS News Server allows attaching of documents in a variety of multimedia formats discussion groups have enormous options as vehicles for distribution of information and knowledge. Group members can download documents sent to the group, mark them up, and send them back. DNEWS provides leading edge detection and filtering options to protect your server, users and the wider USENET community from "SPAM". DNEWSWEB - News to Web Gateway and Full Text Searching: DNEWSWEB is a news to web gateway provided with the DNEWS Server. This provides users the additional option of reading and posting news directly from ordinary HTML pages using any browser. This has several advantages:
Support and Documentation DNEWS is commercially software supported and actively developed by Netwin LTD. This means that if you need assistance at any stage there are experts available to solve any difficulty quickly. In addition there is a mailing list and news group for users to exchange knowledge and experience. DNEWS includes a comprehensive user manual in HTML format. System Requirements Minimum Requirements, for DNEWS, using the dynamic feed: For DNEWS using a traditional feed: Typical Configurations - ranges:
|
Products | Downloads | Prices | Support | Company | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
![]() |
![]() |
![]() |
![]() |
||||||||
|