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qBT total size vs downloaded mismatch (lemmy.world)

submitted 4 months ago* (last edited 4 months ago) by [email protected] to c/[email protected]

4 comments fedilink hide all child comments

When using qBitTorrent to download Linux ISOs, I am seeing that the total size of the download is one thing, then the total downloaded when complete exceeds (sometimes by almost double) that size.

For example:

Size           Downloaded  
900MB            1.56GB
1.6GB            1.91GB

Why is that thing?

top 4 comments

sorted by: hot top controversial new old

[–] [email protected] 3 points 4 months ago (1 children)

It's probably because of the way torrent works. If some of the data from a peer doesn't pass whatever verification checks then it downloads it again. To me those look like normal variations in file size versus actually downloaded by the torrent client.

[–] [email protected] 2 points 4 months ago (1 children)

Overhead and retransmissions; got it.

THX for the reply. I was getting nowhere with my search-fu and ADD attention span.

[–] [email protected] 1 points 4 months ago* (last edited 4 months ago)

More retransmissions than overhead. This is big concern when downloading movies and TV shows because there are attempts to poison the DLs for people (or there was when torrent was first created as a protocol).

[–] [email protected] 2 points 4 months ago

doesnt hurt th check the hash against what the distributor publishes.