little request: distributed copies

[mezigues]

it would be nice if µ could show if all pieces have been distributed, so we could stop seeding before there's other seeds and go on with our upload agenda

[Redleer]

stop seed before there is other seed? what hapends if your only seeder and you stop before there is other seeds?

[DreadWingKnight]

Availability > 2 = 1+ distributed copy besides yourself

[mezigues]

well reedler: that's the point...

if all the peers, even if none is seed already, do have all the pieces, i can stop seeding and they'll finish the download just fine by themselves... therefore allowing me to upload something else

[mezigues]

Availability > 2 = 1+ distributed copy besides yourself

ok! thx: didnt even think about that bar! ^^

[splintax]

stop seed before there is other seed? what hapends if your only seeder and you stop before there is other seeds?

DreadWingKnight hit the nail on the head. It's technically possible for users to finish the download as long as you have distributed a full copy (availability > 2). But it's better to wait for at least 5 seeds, IMO, because not all users are trustworthy enough to seed back what they take

[mezigues]

sure... on public trackers!

but am using µ on private trackers where seeds stay ^^

[Switeck]

Even if availability is >2, this assumes the majority of those will stay to seed once they finish their download. If there's only a tiny number of peers with >50% of the file of which only 2 have >90% of the file -- if the 2 with >90% of the file leave immediately after finishing downloading, the availability of the file could drop from >2 to <0.6. And then none of the remaining peers can complete the files unless a seed rejoins the torrent.

This is why if you do this it's a good idea to check back in a day to a week to see if there's enough seeds or distributed/virtual copies for others to get the file. I've done this myself by setting that torrent to 1 KB/sec upload speed to 1 upload slot at a time -- hardly hurts anything else I'm downloading/uploading that way, although it's not particularly helpful for those on that torrent. Still, if all they're missing is <5 file chunks of 2 MB size or smaller and I leave µTorrent running a few hours that's enough.

[P0ldy]

Even if availability is >2, this assumes the majority of those will stay to seed once they finish their download.

More importantly, it assumes that every peer in the swarm will stick around.

Under this scheme, if ONE peer with a piece no one else has drops out, no one in the swarm will finish. This is why superseeding isn't very effective.

But still, I like the request and feature.

[DreadWingKnight]

This is why superseeding isn't very effective.

A properly implemented super-seed algorithm is desinged to specifically prevent the "one piece exists on only one other peer" scenario by forcing the rarest pieces out first.