Vagaa

Vagaa () is a peer-to-peer program originating from Mainland China. The software is compatible with eDonkey network and BitTorrent and can be used for downloading large files, however as it has been blocked from most eDonkey servers, its usefulness has dropped in the past years. The software is being developed by users from Mainland China and has special support for some techniques utilized on complicated LANs.
General
Vagaa has some special soft router algorithms library, which speed downloading and uploading, even between the NAT users. Also the famous distributed search system. The search function is quick and full of multi-language content from users.
Use of this software is often frowned upon by server operators for its overly-aggressive and almost faulty stress exerted on the respective server and sometimes result in the banning of Chinese users.
The company produce the Vagaa software suggested that Vagaa borrowed technology from eDonkey2000, BitTorrent and Kad that by applying proprietary distribution routing technology, high connectivity and stability is maintained. In additional, the application of Keywords Smart Analysis technology allowed proprietary distributive searching and indexing made the searching speed much higher than other competitive products. Vagaa is also the first product produced by Mainland Chinese to allow viewing of VOD downloading.
Criticism
Critics suggested that Vagaa is based on a modification of the famous GPL P2P software Shareaza.
In additional, the search mechanism of Vagaa did not make use of any special algorithm to speed up searching and indexing, but instead it achieved this optimization by spamming/bombarding the servers in question. Therefore, most of the servers on the eDonkey network refuse connections from Vagaa to maintain their system stability, which greatly reduces the usability of the client.
Vagaa abnormality
On 12 August 2006, the P2P network DonkeyServer made the following announcement:
However, DonkeyServer did not mention about which P2P was causing the problem, as well as their version numbers.
On 13 August 2006, cnBeta.com, a famous IT News portal in Mainland China summarized the information collected and suggested it was Vagaa that caused the system instability. After that, the Vagaa official website received a DDoS attack. Then, the software company apologized in public and promised to provide an updated version of the software with the problem solved. However, the updated version did not stop its bad behavior according to a comparison testing among official eMule release, verycd.com mod release and vagaa, on one of the famous IT News portal www.it.com.cn

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