It is also possible that a client knows other clients that are also sharing that same file. When a complete chunk of 9,728,000 bytes (9500 KiB) is downloaded and verified, this data is also shared by the downloader, helping others to download the file as well. eMule will then be queued until an upload slot becomes available. The servers return a set of IP/ports that indicate the locations of the clients that share the file.ĮMule then asks the peers for the file. The client then asks the servers where the other clients are using that hash. Users can search for filenames in the servers/kad and are presented with the filenames and the unique identifier consisting of the top-level MD4 hash for the file and the file's size that can be added to their downloads. The top-level MD4 hash, file size, filename, and several secondary search attributes such as bit rate and codec are stored on eD2k servers and the serverless Kad network. The 0.47b version adds protocol obfuscation and eMule will automatically select two port numbers at random in the startup wizard.īasic concepts File transfer statistics of v0.48aĮach file that is shared using eMule is hashed as a hash list comprising separate 9500 KiB chunks using the MD4 algorithm. The 0.46b version added the creation and management of "eMule collection" files, which contain a set of links to files intended to be downloaded as a set.įrom 2007, many ISPs have used bandwidth throttling for usual P2P ports, resulting in slow performances. Other recent additions include: the ability to run eMule from a user account with limited privileges (thus enhancing security), and AICH (so that a corrupted chunk does not need to be re-downloaded entirely). Some users have complained that it leads to a loss of active sources and subsequently slows download speed. Unavailable IPs are banned for a time period from 15 to 45 minutes. After adding an IP to the "Bad source list", the application treats this IP as a "dead" IP. The application adds an IP address to this list after one unsuccessful connection. In new versions, a "Bad source list" was added. This network has an implementation of the Kademlia protocol, which does not rely on central servers as the eDonkey network does, but is an implementation of a distributed hash table.Īlso added in recent versions were the ability to search using unicode, allowing for searches for files in non-Latin alphabets, and the ability to search servers for files with complete sources of unfinished files on the eDonkey network. The eMule project website started up on December 8, 2002.Ĭurrent versions (v0.40+) of eMule have added support for the Kad network. The 'Credit System' was implemented for the first time on Septemin version 0.19a. The source was first released at version 0.02 and published on SourceForge on July 6, 2002.ĮMule was first released as a binary on Augat version 0.05a. Over time more developers joined the effort. The eMule project was started on by Hendrik Breitkreuz (also known as Merkur) who was dissatisfied with the original eDonkey2000 client. ĭevelopment was later restarted by the community as eMule Community the latest stable version is 0.70a. ![]() Since July 2002 eMule has been free software, released under the GNU General Public License its popularity has led to eMule's codebase being used as the basis of cross-platform clients aMule, JMule, xMule, along with the release of many eMule mods (modifications of the original eMule) on the Internet.Īs of October 2023, it is the fifth most downloaded project on SourceForge, with over 693 million downloads. ![]() Furthermore, eMule transmits data in zlib-compressed form to save bandwidth.ĮMule is coded in C++ using the Microsoft Foundation Classes. The distinguishing features of eMule are the direct exchange of sources between client nodes, fast recovery of corrupted downloads, and the use of a credit system to reward frequent uploaders. Started in May 2002 as an alternative to eDonkey2000, eMule now connects to both the eDonkey network and the Kad network. EMule is a free peer-to-peer file sharing application for Microsoft Windows.
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