Qbittorrent BETTER Download First And Last Pieces First
Partenia Urtiaga
I start a torrent with 200 media files in it and utorrent insists on grabbing the first and last piece of every single file right away even if I set the file's priority to low. I would very much like it to not do this as it is completely useless to me.
I have tried setting bt.prio_first_last_piece to false and even tried bt.determine_encoded_rate_for_streamables to false also because who knows maybe it really wants those headers but neither of these changes help.
However, I do have something potentially useful to say: You say you've tried setting individual file priorities to "Low". Make sure you've set other files for a higher priority. I'm pretty sure that File priorities always take precedence over piece priorities; however, if uTorrent connects to a peer that does not have (or does not offer) any pieces you need in your highest priority files, uTorrent checks if it has pieces in your second highest priority files, and so on. Once the FILE that there is one or more pieces available for has been selected this way, uTorrent then considers piece priority. If uTorrent always does first/last priority now, for example, it will try to grab the first or last piece, or if not available, the rarest piece as far as it has determined. Some torrenters may have prioritized different files than you (or even only downloaded certain files) and are therefore only offering pieces for files that are a "Low" priority for you -- but you will still download from them rather than discard what they are offering, which can result in pieces in low priority files being downloaded at any time (and uTorrent perhaps making those pieces the first/last if it can).
I hope that makes some sense. I didn't answer why first/last priority is applying, but I hope I've explained why you may see parts of low priority files downloaded -- and therefore first/last pieces of low priority files downloaded.
BitTorrent clients will download whatever pieces are available, so if OTHER peers have bt.prio_first_last_piece set to true, those ARE most likely to be the first pieces downloaded if the seeds have no free upload slots for the 'rarer' pieces.
If the issue was that I am just getting common pieces early and that those pieces happen to be the start/end of files then I would expect to occasionally see pieces from the middle of low priority files get downloaded early as well. This is not the case, so I do not think this is merely a matter of me downloading the common pieces first.
Then if you set different priorities for every file you might see what I see with this many priorities: the very very lowest priority files will very very rarely get a piece downloaded at all. it will not generally get it's first/last piece downloaded before other torrent data. But some of the highest priorities that are not yet complete (i.e. 15,14,13,12, etc. with declining probability) may get a piece downloaded here and therre if that was all the peer offered, and yes there does seem to be a preference for the first/last piece in those cases when peers don't offer anything you need in the higher priority files.
qBittorrent v4.5.0beta1 was released.
This is the first beta release for the upcoming 4.5.x series. More beta releases will follow.
At this point, no changelog is provided. Also no source tarballs. If you want build from source then just use the relevant git tag.
qBittorrent v4.3.4 was released.
WEBUI: It is accidentally broken in this release. Use v4.3.4.1 instead.
The sorting logic has been reworked. To get the old sorting order for the "queue number" column, first sort on the "Completed On" column and then sort on the "#"(queue number) column.
Support for Ubuntu 18.04 (Bionic Beaver) has been dropped.
Since it was a month since the last stable and v3.4.0 seems to be delayed just a bit, it was a good time to backport critical fixes and do another v3.3.x release.
Alongside v3.3.16 there is beta2 of v3.4.0. It contains various fixes for the things mentioned in the first beta plus a few new additions. See changelog. This beta works on Windows XP (32-bit) too. macOS packages are ready too.
Finally, the future stable version will be v4.0.0 not v3.4.0
v3.3.16 changelog:
Today represents an important milestone for qBittorrent. We have uploaded today on Sourceforge our first Windows installer for qBittorrent v2.2.8+. This installer should be regarded as a public beta as we are looking for feedback before making an official stable release (v2.2.9).
First of all, we would like to wish you all a happy new year. To enjoy this new year even more, I'm planning to release qBittorrent v2.1.0 really soon and We uploaded a first release candidate today. We are hoping that people will test this release candidate and report issues as soon as possible so that we can make a stable release before the end of this month.
If you assign qBittorrent to handle torrent files, a double-click on a torrent file will open it in qBittorrent where you can enable all the options that you find convenient. You can, for instance, configure the client to download in sequential order, skip hash check, download the first and last pieces first, choose a download location, and choose whether or not to follow the original content layout.
Although the unRAID GUI is unresponsive, other things are running: I can access files and open them. I think the first time the Win10 VM was still running, although this time I can't RDP into it. Both times I've tried "powerdown" via SSH but the server doesn't seem to shut down.
The first time I couldn't get into the GUI to get diagnostics (and didn't know that this could have be done via the command line). Unfortunately I can't recall exactly how I shut down the server the first time. Might have been via IPMI. This time (today) I grabbed diagnostics and then tried to shut down via the GUI. Heard the beeps (as before) but after about 45 minutes the server was still on (as before). In the end I shutdown via IPMI.
When I rebooted after the first incident, one of my disks was marked as missing. Seemed to be a loose SATA connector; after some replugging I started the server and everything seemed OK. But today I got the unresponsive GUI again.
On qbittorrent I had been using an older version of the container precisely because of the problem described. But recently that older version stopped working and I changed to the latest version, which seems to be running fine, unless it's causing these crashes. I'm not sure, but I think the first crash came before switching to the latest version.
I guess I will have to backup existing files first, when I get home. Once I change the file system format and copy those files back on the drive, previously mentioned commands should work or there is some additional step before those?
It may not be that. The piece with green is the first piece of the file. Three times now, I have seen the first piece of the file below dl, to completion and the same Element Not Found error occurs. So, now I have 0% of one file and 99.9% of another file and for both it seems that the first piece is the culprit. The file in the above paragraph at 99.7%, seems to not be finishing, no pieces of that file are in the Pieces tab. I am wondering if it is a bad torrent, but a lot of seeders have sprung up pretty fast.
I downloaded a movie, but I only downloaded it for the first 10 mins of it. The torrent is 50% complete so that's obviously more than my desire; so instead of waiting for the WHOLE movie to finish, is there I way I can see the incompleted file?
Just because it says it is 50% done, does not mean it is 50% through the movie. A torrent downloads in pieces until finished. But if you do have the first ten minutes, you can usually play an incomplete video file in Media Player Classic. I have done it several times.
I think there is a setting, depending on your torrent client, so that the client attempts to download the first and last chunks of the file first. That would be useful if you want to watch the first few minutes of a video file.
I'd recommend VLC as well to preview an incomplete torrent movie, but, in my experience, I think you need to at least have the first few hundred kilobytes at the start of the video downloaded or else it might fail to play.
This document applies to the first version (i.e. version 1.0) of the BitTorrent protocol specification. Currently, this applies to the torrent file structure, peer wire protocol, and the Tracker HTTP/HTTPS protocol specifications. As newer revisions of each protocol are defined, they should be specified on their own separate pages, not here.
Opera 8 previews and Opera 9.x releases use the following peer_id scheme:The first two characters are 'OP' and the next four digits equal the build number. All following characters are random lowercase hexdecimal digits.
BitSpirit has several modes for its peer ID. In one mode it reads the ID of its peer and reconnects using the first eight bytes as a basis for its own ID. Its real ID appears to use '\0\3BS' (C notation) as the first four bytes for version 3.x and '\0\2BS' for version 2.x. In all modes the ID may end in 'UDP0'. Since BitSpirit 3.6 the peer ID uses Azureus style with characters 'SP' but without trailing '-' (as FlashGet).
The bitfield message is variable length, where X is the length of the bitfield. The payload is a bitfield representing the pieces that have been successfully downloaded. The high bit in the first byte corresponds to piece index 0. Bits that are cleared indicated a missing piece, and set bits indicate a valid and available piece. Spare bits at the end are set to zero.
View #2This section has contained falsehoods for a large portion of the time this page has existed. This is the third time I (uau) am correcting this same section for incorrect information being added, so I won't rewrite it completely since it'll probably be broken again... Current version has at least the following errors: Mainline started using 2^14 (16384) byte requests when it was still the only client in existence; only the "official specification" still talked about the obsolete 32768 byte value which was in reality neither the default size nor maximum allowed. In version 4 the request behavior did not change, but the maximum allowed size did change to equal the default size. In latest mainline versions the max has changed to 32768 (note that this is the first appearance of 32768 for either default or max size since the first ancient versions). "Most older clients use 32KB requests" is false. Discussion of larger requests fails to take latency effects into account.
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