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Firon

µTorrent 3.3 beta

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http://forum.pleasuredome.org.uk/index.php?showtopic=17928

After an extensive test, we uncovered a flaw in uTorrent's caching system for writes, which can be reproduced.

To be precise, the "Disable Windows caching of disk writes" option, which is enabled by default.

Enabling this option bypasses the Windows caching system for writes.

Discussions in the forum about file corruption made us decide to do some tests.

What we did is download the files from the "Mame 0.138 Titles" torrent.

The torrent contains 6469 small files (not zipped).

First we used uTorrent v2.0.2 with default settings.

Saved the files in e.g. "d:\mame\titles" (short directory names are required for clrmamepro) and stopped the torrent when it finished.

When you scan (check only) with clrmamepro and the provided datfile, it will result in reported errors (wrong size and unneeded files).

With each test cmp reported errors with different files.

We removed all the files and then downloaded the same torrent with v.1.6.1 up to v1.7.7 with fresh settings.

Scanning the set with clrmamepro produced no errors (except the unneeded _ReadMe_.txt file)

It went wrong when testing with v1.8 build 11813, which started producing errors again.

One of the changes mentioned in the changelog of that version:

QUOTE

Other major features are bypassing the Windows system cache (see the Disk Cache settings)

The same test with v2.0.2 and "Disable Windows caching of disk writes" disabled produced no errors (except the unneeded _Readme_.txt again).

The uTorrent write cache problem can be bypassed by going to:

Options -> Preferences -> Advanced -> Disk Cache

and disable (uncheck): "Disable Windows caching of disk writes"

However, with version 3.1 and later even this bypass won't help anymore!

We will (try to) report this to uTorrent development (Status: uTorrent devs answered in this thread...).

To keep this thread readable, post clear and relevant questions/answers only please!

The more useful information we get, the better we can help to get this solved.

NU, Petr1fied and ARMAX.

- found at http://pastebin.com/8RqTUu8A (that was posted over 2 months ago and not by me, I'm just passing it along)

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I'm confused though, has that now been resolved or been made a permanent problem? See quote below:

-- 2012-06-04: Version 3.3 alpha (build 27329)

- Change: remove unbuffered I/O for performance

- Fix: fix disk cache graphs

Did you intentionally disabled the Windows cache controls?

Yep' date=' it's gone. Not just disabled, but truly gone. Serves no purpose anymore.[/quote']

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This problem ONLY happens because of the unbuffered I/O. We removed that functionality in the most recent 3.2 builds. Therefore, it should be fixed now.

This problem should no longer happen.

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This problem ONLY happens because of the unbuffered I/O. We removed that functionality in the most recent 3.2 builds. Therefore' date=' it should be fixed now.

[b']This problem should no longer happen.

I'm sorry to say Firon, but it still happens.

I just did a test with the latest 3.2 build (27343) with out-of-the-box settings and files are still shown wrong.

TorrentCheck v0.6c Report file

------------------------------

File check/size check:

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\alpinesa.png" wrong: 19456 right: 19445

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\batrideru.png" wrong: 31744 right: 31414

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\bayroutej.png" wrong: 11264 right: 11187

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\bigprowr.png" wrong: 28160 right: 28098

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\crgolfbt.png" wrong: 5632 right: 5517

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\dblpointd.png" wrong: 80896 right: 80559

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\ddrs2k.png" wrong: 51712 right: 51237

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\fghtbskt.png" wrong: 18432 right: 18251

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\finalap3.png" wrong: 10240 right: 9937

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\ikarinc.png" wrong: 4608 right: 4597

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\j5fairgdb.png" wrong: 3072 right: 2901

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\j6jackjs.png" wrong: 4096 right: 4031

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\jupk_g51.png" wrong: 16896 right: 16677

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\m1apolloa.png" wrong: 5120 right: 4986

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\m4bnkrol.png" wrong: 6144 right: 6012

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\m4graffd.png" wrong: 6144 right: 5857

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\nagano98.png" wrong: 23040 right: 22918

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\orlegend.png" wrong: 64512 right: 64405

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\pc_wgnmn.png" wrong: 17408 right: 17216

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\pistoldm.png" wrong: 13312 right: 13276

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\rip302.png" wrong: 16896 right: 16677

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\sc4coroh.png" wrong: 6144 right: 5684

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\sc4msclbf.png" wrong: 26624 right: 26258

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\sc5dndtba.png" wrong: 6144 right: 5674

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\shienryu.png" wrong: 34304 right: 34241

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\sloco93.png" wrong: 2560 right: 2547

Wrong file size: "D:\downloads\MAME_0.145_Titles\titles\totd.png" wrong: 4096 right: 3994

Correct files: (16517/16544) - Missing files: (0/16544) - Wrong sized files: (27) - Successfully trimmed files: (0/0)

As you know this can simply be reproduced by using the MAME 0.145 Titles torrent and the Torrencheck tool (or CMP if you wish), which both can be found on the PD site.

This torrent is also an excelent "Disk overloaded 100%" test due to the large amount of small files ;)

NU.

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Any timeframe on when you might deem it fit for public beta?

I tend to trust you guys with the designations and alphas are a little to early in the dev cycle for me to be comfortable with.

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27329:

1. Broken DHT counter: 6.5 million nodes after a week of continuous work.

2. Disk overload 100% on the start of download

3. 470 Mb of operating memory consumed after a week of work

4. Last downloaded files stay permanently in "Downloading" folder showing "Writing to disk" ("Сброс на диск") as a state. Link: http://ic.pics.livejournal.com/evocator/548320/11625/original.jpg

original.jpg

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Any timeframe on when you might deem it fit for public beta?

I tend to trust you guys with the designations and alphas are a little to early in the dev cycle for me to be comfortable with.

The time frame generally for things like this is "When it's done"

There was a rushed development IMO in the 3.x branch that 3.2 and 3.3 are trying to fix up and judging from the previous post it's still got a way to go.. I'd say give it a couple of months before beta although even then there's no certainty it's not going to break something. As always back up before you try it.

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As 3.2 is RC1 already it should get stable in next time. When this is done normally the alpha version of 3.3 will be at beta stage, not earlier.

To have some alphas or betas at the same time (has happened already) should be avoided :P

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I'm sorry to say Firon, but it still happens.

I just did a test with the latest 3.2 build (27343) with out-of-the-box settings and files are still shown wrong.

As you know this can simply be reproduced by using the MAME 0.145 Titles torrent and the Torrencheck tool (or CMP if you wish), which both can be found on the PD site.

This torrent is also an excelent "Disk overloaded 100%" test due to the large amount of small files ;)

NU.

Did you start with brand new data, or an existing torrent?

edit: OK, it was new data. I'll report this and investigate more. It was SUPPOSED to be fixed, but I guess there's still some other cases beyond just what we knew caused it.

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Seems that the "Added" column in the RSS feeds is broken/incorrect in B:27408.

I see some RSS feeds with everything at "Less than a minute ago", or most are blank, and some seem to be correct.

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27408:

After three days uptime amount of DHT nodes grew up to 1 500. Sure, it's not the 6 million but something abnormal, either. And 100% disk overload in the start of download still stays on.

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And even through I unchecked all of these things, it still added a toolbar to my browser and put utorrent in my quicklaunch area.

How many checkboxes did you uncheck?

u have to hit deni one of the thing it ask u got to read everthing before clicking i didnt notes it either at first

:|:|

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Dear Techies

I have used uTtorrent for years on my old tower, running XP, with great satisfaction & entertainment. Just suffered my third failed attempt to install it on my almost new laptop, running 7; hang-ups each time. very frustrating. I ran Ccleaner, Chkdsk & a complete virus scan, in case I was my fault, before trying the last time. Yeah bugs, hang-ups & no joy. I'm quitting before I get to the crash stage.

Keep at it, I know you can sort it out for us, & thank you.

I'll try again in a few days/weeks.

Love & Light

|Chris

.

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I'm quitting before I get to the crash stage.

Why the heck are you trying an *alpha* release and complain about it ??? Use the latest stable or RC!

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Why can not I see a stable version changelog? (Forum closed) Why the title of this topic is old?

3.1.3 is the "final" version of the 3.1 branch; development on that branch has stopped.

The current release candidate is 3.2, which will become the next stable version.

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27454:

Strange multi-instance message of single-time error

[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0[2012-06-21 03:55:21]  IO Error:1168 line:68 align:-99 pos:-99 count:4 actual:0

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