Exactly a year ago The Pirate Bay team surprised friends and foes when it announced that the world’s largest BitTorrent tracker was shutting down for good. The site's torrent index would remain online, but millions of users had to find alternative trackers or rely on trackerless technologies to share their torrents from then on. In addition, The Pirate Bay suggested a move away from .torrent files entirely in the future.

In the fall of 2003, a group of friends from Sweden decided to launch a BitTorrent tracker named ‘The Pirate Bay’. It soon became one of the largest BitTorrent trackers on the Internet, coordinating the downloads of more than 25 million peers at its height.

The Pirate Bay boasted the title of “the world’s largest BitTorrent tracker” for half a decade, but a year ago this title no longer applied. On November 17, 2009 The Pirate Bay decided to shut down its tracker for good. According to the Pirate Bay team central trackers had become obsolete.

“Now that the decentralized system for finding peers is so well developed, The Pirate Bay has decided that there is no need to run a tracker anymore, so it will remain down! It’s the end of an era, but the era is no longer up-to-date,” the team announced.

The Pirate Bay argued that BitTorrent trackers have been made redundant by technologies such as DHT and PEX. In addition, The Pirate Bay team said that they might move away from torrents entirely and switch to offering Magnet links instead.

“We’re talking to the other torrent admins on doing magnet links and DHT and PEX for all sites. Moving away from torrents and trackers totally – like pick a date and all agree ‘from this date, we’ll not support torrents anymore’,” a Pirate Bay insider told TorrentFreak at the time.

The announcements led to confusion and uncertainty among many torrent users, but in reality very little changed for the average torrent user. The Pirate Bay’s dominant position as a tracker has been taken over by two new ones, and even after a year .torrents are still available on The Pirate Bay.

What was interesting to see, however, is the response that came from the development community and torrent site owners. Before last year most torrent clients didn’t have support for Magnet links, and those that did spent little time on making them compatible and easy to use. However, after The Pirate Bay’s call for Magnet support this quickly changed.

BitTorrent clients such as Transmission, BitComet and Ktorrent all implemented support for Magnets this year. The clients that already offered Magnet support, such as uTorrent and Vuze, didn’t sit still either and spent time optimizing their implementation.

Similarly, the operators of other torrents sites were also listening in and nearly all of the larger torrent sites that didn’t already offer Magnet links soon added them. In January, this was followed by the launch of the first ‘Magnet-only’ torrent index named TorrIndex. Clearly, the words uttered by The Pirate Bay operators had not been in vain.

As for the tracker that was shut down, aside from the sentimental value it hasn’t really been missed. OpenBitTorrent and PublicBitTorrent quickly took over and have been going strong ever since, and not without a reason.

Larger torrents with thousands of peers will work just fine without a central tracker thanks to technologies such as DHT and PEX. 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.

The shut down of The Pirate Bay tracker last year marked the end of an era, but as it stands now BitTorrent trackers are not defunct yet.