7-Zip 24.03 beta

[Sam Tansy]

Being ZSTD user myself I'm sure I did not.

Did not what?

And zstd.exe can't either pack or unpack ZSTD inside 7z container

And so do bzip2 that cannot unpack bzip2 wrapped in 7z container. Nor unzip cannot unpack/decompress deflate wrapped in 7z container.

so as 7z.exe can't.

7-zip-zstd too? It did last time I checked.

Yes, this is very fringe to ask them to use 7-zip's own method for 7z files.

So what am I when I use bzip2 or deflate in 7z container - these are not '7-zip's own methods'? Is that not against your morals, to use foreign codecs in 7z?

You've just written that everything is need for these formats is provided by somebody else as plugins and all that staff

Certainly.

And why Igor Pavlov should spend his time instead of developing LZMAs for example adding the things that are already done according to your words?

Ask him, how am I to know?

7-zip is free to add any functionality you'd like but why Igor himself should do this?

Like above - who says he should. Did anyone forced him to do that?

Who will develop a 7z format itself and its algos, then?

Like above.

Almost dead. That's why Igor has just added a special option for RAR5 archives with the big dictionaries to unpack them in case Winrar is gone for good.

I didn't say it's dead, but that less people is using it.
I dont know Roshals' numbers and figures but I can conclude from what I see on internet.

Mind you that Winrar added 7z format support in version 3.40, back in 2004, four years after 7-zip dir add Rar support. Nevertheless it was 20 years ago, and world was a lot different than is now. Since that it's a race, almost like an arms race, certainly red queen's race, and marketing strategy. But a lot changed since, so your, supposedly sarcastic, remark is a miss.

Well, you are right he's very able to decide himself.

I count on it.

[Anonymous]

7-zip-zstd too? It did last time I checked.

Yes, 7-zip-zstd can do it. But I'm here not to discuss any sort of 7-zip's forks Github has.

[Sam Tansy]

They created and maintain the fork. Good for them
7-zip's developer decided to add zstd to supported codecs for unrevealed reasons, which we can only guess, but he did it freely, no one force him to do that.
So, what is your problem?

[Anonymous]

I have only one problem here - that one person as I see in this specific topic can't even read and I'm very glad it's not Igor. And this is it.

[Devil]

7-Zip NOT save the setting
плохо что не запоминаются настройки показывать секунды,
нужно дать пользователям возможность самим выбирать что им нужно

it’s bad that the settings to show seconds are not remembered,
you need to give users the opportunity to choose what they need

[Tony Stark]

*Dear System Administrator,

I hope this message finds you well.

I'm in need of expert advice regarding time tracking solutions tailored for business operations.

Could you kindly suggest some high-quality options that would meet our organizational needs?

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[lelik007]

Igor, can you explain this, please: I measured BLAKE2sp speed with the command you'd mentioned here:
https://sourceforge.net/p/sevenzip/discussion/45797/thread/de1d20a156/#3c0a

7z b -mm=blake* -stm1

i7-2600K was used : 4C/8T @ 4.5 Ghz (no AVX2) and It showed me ~ 910 MByte/s
and this is the actual speed I have now reading a disk cache or a RAM disk. And by the way XXH64 ~ 3730 MByte/s.
My question is - what does this command show then?

7z b -mm=blake*

[Igor Pavlov]

b -stm1 is single-thread on Core 0
b without -stm1 is multi-thread benchmark. And each thread works with different data. So it shows full performance of CPU with all cores loaded.

7z h command is single thread still. So it can be limited by speed of single thread.

If we have many files for 7z h hash command, we could use new threads for new files. But such feature was not implemented in 7-zip.

XXH64 ~ 3730 MByte/s.

it's limited by windows cache opeartions (RAM cache or disk speed).
Real XXH64 speed is such:

7z b -mm=XXH64 -stm1 -mtic=30

RAM reading bandwidth in last rows (25-27):

7z b -mm=XXH64 -mtic=30

file system reading from cache actually is slow:

7z h file -scrcxxh64 -bt
Kernel  Time =     0.937 =   75%
User    Time =     0.296 =   23%
Process Time =     1.234 =   99%
Global  Time =     1.237 =  100%

User Time = 23% - is XXH64
Kernel Time = 75% - is some work in kernel.

[lelik007]

Thank you for the answer.

7z h command is single thread still. So it can be limited by speed of single thread.

It's seems so because BLAKE2sp can be up to 8 way parallel and benefits of every additional

thread.

Real XXH64 speed is such:

7z b -mm=XXH64 -stm1 -mtic=30

This command shows: Avg: 12336 MB/s and

xxhsum -b

shows: 10249.7 MB/s for XXH64

it looks slow. So it's limited by RAM cache or disk speed.

Yes, I think some I/O limitations. But for the real use 7-zip and xxhsum are neck and neck.
For my SATA-III SSDs (Kingston KC600) with 550 MB/s neither of these algos is a bottleneck.

[Devil]

при архивировании папки Windows появляется сообщение
Access is denied.
cannot open file
C:\Windows.7z

[Igor Pavlov]

Windows blocks file creation in root folder C:\
But you can create folder there instead.

[Devil]

WinRAR может создавать архивы in root folder C:\

[Igor Pavlov]

It requires administrator rights.

[Devil]

у меня WinRAR.exe работает с правами администратора,
а 7-Zip так не может

[Igor Pavlov]

Why 7-zip can't work with administator rights in your case?

[Devil]

если в настройках 7zG.exe поставить запуск с правами администратора,
то архивы не создаются, появляется сообщение
The requested operation requires elevation.
C:\Program Files\7-Zip\7zG.exe

[PopuriO2]

if you set 7zG.exe to run as administrator,
the archives are not created, the following message appears:
The requested operation requires elevation.
C:\Program Files\7-Zip\7zG.exe

Translated using DeepL.

[Igor Pavlov]

maybe you need admin rights for 7zfm.exe .

[Devil]

если в настройках 7zG.exe и 7zFM.exe поставить запуск с правами администратора,
то архивы не создаются, появляется сообщение
The requested operation requires elevation.
C:\Program Files\7-Zip\7zG.exe

[PopuriO2]

If you set 7zG.exe and 7zFM.exe to run as administrator,
the archives are not created, the following message appears:
The requested operation requires elevation.
C:\Program Files\7-Zip\7zG.exe

Translated using DeepL.

[Igor Pavlov]

try admin rights for 7zfm.exe only.

[Devil]

если admin rights for 7zfm.exe only создание архивов не идет с правами администратора из context menu
так как не создаются архивы in root folder C:\

[AlexS]

Igor Pavlov . in the help for switches ai, ax there are no <mark_type> ::= m[- | 2], <wildcard_type> ::= w[-], in the command line there are.