Despite claims that millions of BitTorrent downloads would cease to work if a major BitTorrent tracker closed down, most downloaders today don’t even notice when a tracker stops working. Thanks to technologies such as DHT and PEX central trackers have become a luxury good to some degree.

Indeed, larger torrents with thousands of peers will work just fine without a central tracker. But the majority of torrents out there only have a handful of peers and for these files a central tracker is still an essential part of the downloading process.

It’s therefore good to know that several new players took the place of The Pirate Bay’s tracker when it shut down last year. Below we show a list of the five largest public BitTorrent trackers based on the number of torrents and peers (downloaders+uploaders) they track.

The first thing that stands out in the top five above is that the first three spots are taken by standalone trackers that do not have a torrent index or search engine attached to them. These three trackers are responsible for the coordination of millions of public downloads on BitTorrent but do not provide any torrents on their sites like The Pirate Bay used to do.

PublicBitTorrent and OpenBitTorrent, number one and two in the list, are both relatively new trackers that emerged after The Pirate Bay announced that it would sell the site last year. This sale eventually failed to go through, but The Pirate Bay did close its tracker so both trackers became a very welcome addition to the BitTorrent ecosystem.

Another observation is that there is a lot of weight on the shoulders of the top three trackers. Although there are close to 50,000 known BitTorrent trackers, only a fraction of these are active, and of these only a few dozen track more than 1,000 torrent files. Without the five trackers in the list above most of the smaller public torrents could quickly become unavailable.

Although trackers in the top five are all public ones, there are a few private ones that should be in this list if it was only based on the number of torrents tracked. The music tracker What.cd, for example, currently tracks more than 800,000 torrents alone. A dazzling number that puts the site in fourth place based on the number of torrents, not peers.

For BitTorrent’s long tail content reliable public trackers are still invaluable. The good news is that the ecosystem is better off than a year ago when The Pirate Bay was carrying this burden alone, but it’s far from bulletproof yet.

Source: The World’s 5 Largest Public BitTorrent Trackers

“We noticed that you, through the activities with swedvdr.org, similarly engaged in copyright infringement of several works whose rights belong to our principals. You are hereby requested to immediately take the necessary measures to prevent the ongoing incursions,” wrote Antipiratbyrån in an email to the operator of the Swedvdr BitTorrent tracker.

The demands are as follows:

- Delete all Torrent files from swedvdr.org referring to copyrighted works.
- Take steps to prevent future uploads to swedvdr.org of torrent files.
- Take measures to prevent the ability to upload or download torrents.

The email from the anti-piracy office of course ends with a threat. “Unless your contribution to the incursions have stopped by 29th April 2009, we have advised our clients to take legal action against you,” they write.

While Swedvdr did indeed comply with the request to shut down the site, TTi, another popular private tracker announced that it will only post torrents with consent from the copyright holders from now on. “TTi will only concentrate on bands/artists that want to spread their material on the Internet and are waiting for a record contract,” TTi staff announced.

“Because of all the turbulence and insecurity about whether it’s okay to run a tracker or not, we have now decided to go full out on bands that want to be discovered through the Internet. We of course realize that many of you are disappointed about this suggestion, but we have decided that this is the best for the future of TTi,” they add.

Closing the site is not an option according to TTi staff.

It came as no surprise that Antipiratbyrån was going to use the TPB verdict to their advantage. Their counterpart in The Netherlands, BREIN, has been doing the same thing for years. Ironically, this will only mean that The Pirate Bay will see an increase in visitors.

Source: Swedish Anti-Pirates Threaten BitTorrent Trackers

Outlaw.lv, one of the largest trackers in Latvia is currently offline following pressure from the Economic Police, while rumors say that one of the top uploaders was detained for a few hours. “Economic Police has shut down our project. Outlaw LV will be back in a new way and with a new mission,” reads a message on the front page.

It is clear though that the authorities aim to take more sites offline. Danger.lv is another tracker that has received a letter from the police, and they decided to pull the plug voluntarily, for the time being.

Similar to last summer, several other BitTorrent trackers became extra cautious after the renewed attention from the authorities. Bithack.lv was one of the trackers that took action. The site didn’t close however, but now serves recipes instead of torrent files.

TorrentFreak spoke with one admin of a local BitTorrent tracker, who informed us that they have also been receiving letters from anti-piracy organizations. “A handful of popular trackers are taking severe countermeasures to avoid any possibility of takedown and continue to serve the community for now, hoping that no takedowns will follow,” he said.

As with many of the takedown attempts in other parts of the world, lobbyists from the entertainment industry are the ones tipping off the police, and assisting in ‘evidence gathering’ and even raids. In Latvia it’s LAmpA, but the BPI and IFPI have also been assisting the authorities, most notably with the raid on the popular music tracker OiNK.

Needless to say, these anti-piracy outfits are not the most objective partner when it comes to solving these type of digital ‘offenses’, and it’s worrisome to see how they appear to be increasingly intertwined with local authorities.

Source: Police Shut Down Latvian BitTorrent Trackers