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  1. #31
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    I could not reproduce the exact issue (the file that caused it was erased forever, the resultant file attached to this post), but I managed to get another startling error: a visual C++ Runtime error. The file, however, is left intact. Upon further trials with different files, it seems the behavior is hard to reproduce--I haven't gotten it to erase the starting file. Maybe conditions have to be just right; i.e. 7-zip 4.62 must open a solid lzma 64MB dictionary .7z file greater than 60MB, etc. Maybe the rename by the second instance of 7-zip was attempted during an extraction process by the other instance of 7-zip. Maybe my computer is simply bonkers. Regardless, now that I try to reproduce the issue, I can't come up with the exact problem, so the world may never know, or the bug is too subtle.
    Attached Files Attached Files

  2. #32
    Member chornobyl's Avatar
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    10 years of 7-zip

    2.00 Beta 1 1999-01-02
    -------------------------
    - Original beta version.

    Today is the tenth (maybe more) anniversary of 7-zip project.
    Many things has changed since then, and 7-zip itself evolved, the only stable thing is its quality.
    Thanks to Igor for his efforts along all this years, he still trying to make it even better, and we know he will. Long live sevenzip!

  3. #33
    Member Vacon's Avatar
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    Hello everyone,

    and as the present -> Igor offers version 4.64 to us

    Best regards!

  4. #34
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    Quote Originally Posted by chornobyl View Post
    2.00 Beta 1 1999-01-02
    -------------------------
    - Original beta version.

    Today is the tenth (maybe more) anniversary of 7-zip project.
    Many things has changed since then, and 7-zip itself evolved, the only stable thing is its quality.
    Thanks to Igor for his efforts along all this years, he still trying to make it even better, and we know he will. Long live sevenzip!
    Do you get this version?
    I can't find this in sourceforge archives.

  5. #35
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    Quote Originally Posted by roytam1 View Post
    Do you get this version?
    I can't find this in sourceforge archives.
    Search on Archive.org :
    http://geocities.com/SiliconValley/L...zip/index.html
    or
    http://compression.hypermart.net/

  6. #36
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    you can't find the 2.00 beta 1 on the web now IMO.

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    Quote Originally Posted by roytam1 View Post
    you can't find the 2.00 beta 1 on the web now IMO.
    Bulat may have the first beta.

    I attached beta 2 (passed through Simtel)

    Edit: after a little search (found via files.lt) :
    ftp://195.34.232.146/pub/windows/win...c/7zip2001.zip
    Attached Files Attached Files
    Last edited by Mike; 4th January 2009 at 19:59.

  8. #38
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    Quote Originally Posted by Mike View Post
    Bulat may have the first beta.

    I attached beta 2 (passed through Simtel)

    Edit: after a little search (found via files.lt) :
    ftp://195.34.232.146/pub/windows/win...c/7zip2001.zip
    Thanks, get it finally.

  9. #39
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    7-Zip 4.64 was released.
    What's new after 4.62:
    - The bug in 7-Zip 4.63 was fixed: 7-Zip could not decrypt .ZIP archives
    encrypted with WinZip-AES method.
    - 7z File Manager now remembers "Flat View" state for archives.
    - 7-Zip now can unpack ZIP archives encrypted with PKWARE-AES.
    - Some bugs were fixed.
    Last edited by squxe; 7th January 2009 at 16:14.

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    29.01.2009 - Updated Ultra7z Optimizer 0.05
    - Auto switch PPMD/LZMA/Deflate during creation 7z-archives
    - Tuned lzma for jpg, bmp, wav, exe...
    - bruteforce (compare size) for each file extension

    SFC files in one sfc.7z archive from maximumcompression.com:
    7-zip 4.64 ultra word 64 mem 64mb - 11.5 mb
    after Ultra7z Optimizer 0.04 (lzma+ppmd+deflate) - 10.8 mb

    Changes:
    - Updated 7-zip to 9.15.
    - Fixed some antivirus false positives.

    http://ultra7z.ru
    Last edited by squxe; 29th June 2010 at 21:57.

  11. #41
    Member Vacon's Avatar
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    Hello everyone,

    Quote Originally Posted by squxe View Post
    29.01.2009 - Updated Ultra7z Optimizer 0.04[...]

    http://maxcompress.narod.ru/ultra7z.htm
    Thank you Squxe!

    Best regards!

  12. #42
    Member chornobyl's Avatar
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    @squxe
    As i remember, Ultra7z Optimizer, creates non solid archives. Can you intend after method selection, creation of solid blocks for files with with same method.

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    It does create solid blocks, however the way it combines the files differs from "one algo - one block" method.

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    Thumbs up

    Thanks squxe!

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    creates non solid archives
    You're wrong - Ultra7z Optimizer creates solid archives.
    Creation of solid blocks for files with with same method.
    Ultra7z has its cheme.

  16. #46
    Member chornobyl's Avatar
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    - Tuned lzma for jpg, bmp, wav, exe...
    can you tell a bit more about this tuning

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    Ultra7z not working

    Everytime I try to run Ultra7z 0.04 on a 7z archive,
    it runs all test trials and shows a message that 1 file has been moved.
    But no archive is found later in that directory ecxept the unoptimized one.

    Am I doing something wrong or why the optimized archives can't be found
    anywhere on the disk?

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    Quote Originally Posted by Stephan Busch View Post
    it runs all test trials and shows a message that 1 file has been moved.
    But no archive is found later in that directory ecxept the unoptimized one.
    Because optimized archive has the same size or bigger.

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    Ultra7z error on large archives with subfolders

    Thanks squxe

    On most archives this Ultra7z works fine, but on some archives that either have thousands of files or strange sub directories, Ultra7z skips after having the .7z extracted and throws an error message. Has anybody seen that?
    For example, this happens on the Savegames testset.

    However, Ultra7z is a brilliant piece of work and think about adding
    the author to the Hall of Fame.

    My results are online in the evening.

  20. #50
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    On most archives this Ultra7z works fine, but on some archives that either have thousands of files or strange sub directories, Ultra7z skips after having the .7z extracted and throws an error message. Has anybody seen that?
    For example, this happens on the Savegames testset.
    Where can I download it or any other examples which caused crash?

  21. #51
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    On a 4.6 GB 7z archive there was this error during extraction:
    Sub items errors: 8401

    On the Savegames testset there was a syntax error.
    You can find the example file here:
    http://www.squeezechart.com/TEST_Savegames2.7z

    I don't know why this happens.

    When I try to optimize the bitmap set archive (which was encoded
    using PPMd 1536 MB, order 8 with x64 Version, both Ultra7z and
    x32 variant of 7-Zip tell me they cannot allocate the required memory.
    Is there also a x64 variant of Ultra7z available?

    Thanks in advance,

    Stephan

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    3.02.2009 - Updated Ultra7z Optimizer 0.05
    - Auto switch PPMD/LZMA/Deflate during creation 7z-archives
    - Tuned lzma for jpg, bmp, wav, exe...
    - bruteforce (compare size) for each file extension

    SFC files in one sfc.7z archive from maximumcompression.com:
    7-zip 4.64 ultra word 64 mem 64mb - 11.5 mb
    after Ultra7z Optimizer 0.05 (lzma+ppmd+deflate) - 10.8 mb

    Changes:
    - Fixed some bugs (thanks to Stephan Busch)

    http://ultra7z.ru
    Last edited by squxe; 29th June 2010 at 21:56.

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    Is there also a x64 variant of Ultra7z available?
    Please, try ultra7zs.exe in folder "exras" - just copy x64 versions "7z.exe" and "7z.dll" to "c:\windows" (or in some other directory in PATH)

    Btw, optimized TEST_Savegames2.7z is bigger than original, because Ultra7z uses only 64m dictionary for lzma. 48.3 mb vs 48.0 mb.
    Last edited by squxe; 3rd February 2009 at 02:53.

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    Thumbs up

    Thanks squxe!

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    Red face

    Nice work squxe

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    I have a problem with 7zip command line.
    I want to backup all files in the current directory and all subdirectories, but w/out recursing deeper than 1 level below.
    There's only like 10 directories in the root level, so I can even list them all, but a lot of files and when I specify .\* even with -r-, 7zip parses the whole directory tree. Any idea on how could I do this?

  27. #57
    Member chornobyl's Avatar
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    7-zip 4.65 released

    4.65 2009-02-03
    -------------------------
    - 7-Zip File Manager now can calculate SHA-256 checksum.
    - Some bugs were fixed.
    1) Incorrect "memory usage" indication for 1 GB dictionary (LZMA) in x64 version.
    2) when you edit files from zip/AES-256 archives, it saves back now as zip/AES-256 (it was zip/ZipCrypto).
    Last edited by chornobyl; 4th February 2009 at 12:17.

  28. #58
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    Alpha version of LZMA2 codec:
    http://dl.7-zip.org/lzma2_466a.7z

    INSTALL
    -------
    Copy "Codecs" folder to 7-Zip folder.


    DESCRIPTION
    -----------
    LZMA2 provides the following advantages over LZMA:
    1) Better compression ratio for data than can't be compressed.
    It can store such blocks of data in uncompressed form.
    Also it decompresses such data faster.
    2) Better multithreading support. If you compress big file, LZMA2 can split
    that file to chunks and compress these chunks in multiple threads.


    USAGE
    -----

    -m0c=Size : sets ChunkSize.
    Examples:
    -m0c=128m

    If you don't specify ChunkSize, LZMA2 sets it to DictionarySize * 4,
    but min = 1 MB and max = 256 MB.

    LZMA2 uses:
    1 thread for each chunk in -mx1 and -mx3 modes.
    2 threads for each chunk in -mx5, -mx7 and -mx9 modes.

    If LZMA2 is set to use only such number of threads required for one chunk,
    it doesn't split stream to chunks. So you can get different compression
    ratio for different number of threads (-mmt switch).

    Examples:
    7z a a.7z files -m0=lzma2
    7z a a.7z files -m0=lzma2 -mmt2
    7z a a.7z files -m0=lzma2 -mmt4
    7z a a.7z files -m0=lzma2 -mmt4 -mx1
    7z a a.7z files -m0=lzma2 -m0c=128m -m0d=8m -mmt4


    NOTES!
    ------
    It's possible that future versions of 7-Zip will not support archives
    created with this version of LZMA2.
    So don't use this codec to backup important data.
    Use this codec only for test purposes.


    You can check the speed with timer.exe program:
    http://downloads.sourceforge.net/sevenmax/7bench801.zip
    https://sourceforge.net/forum/forum....forum_id=45797

  29. #59
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    ultra7z memory usage

    Hi,
    several tests I just made shows me that one of the reasons why ultra7z sometimes doesn't beat original 7z archive size is that it doesn't use correct memory settings. Example:

    - when I created 7z archive with 64 MB dictionary (ultra mode), ultra7z was able to make the archive smaller and memory usage of 7z and ultra7z was almost the same (about 700 MB).
    -when I created 7z archive with 115 MB dictionary (params: mc=1000000000 d=115m lc=4), ultra7z was not able to make the archive (same content) smaller and task manager showed me that ultra7z used only 700 MB RAM for LZMA and ONLY 500MB for PPDM instead of ~1200 MB for lzma used by 7zip, so it obviously uses wrong dictionary size (and model size for PPMD).

    Or if it's not possible to obtain compression parameters from the archive, why not let the user set the limits (max dict and model size allowed)?

    Hope that helps improving it.

    Michal
    Last edited by mhajicek; 3rd March 2009 at 01:36.

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    Quote Originally Posted by mhajicek View Post
    Hi,
    several tests I just made shows me that one of the reasons why ultra7z sometimes doesn't beat original 7z archive size is that it doesn't use correct memory settings. Example:

    - when I created 7z archive with 64 MB dictionary (ultra mode), ultra7z was able to make the archive smaller and memory usage of 7z and ultra7z was almost the same (about 700 MB).
    -when I created 7z archive with 115 MB dictionary (params: mc=1000000000 d=115m lc=4), ultra7z was not able to make the archive (same content) smaller and task manager showed me that ultra7z used only 700 MB RAM for LZMA and ONLY 500MB for PPDM instead of ~1200 MB for lzma used by 7zip, so it obviously uses wrong dictionary size (and model size for PPMD).

    Or if it's not possible to obtain compression parameters from the archive, why not let the user set the limits (max dict and model size allowed)?

    Hope that helps improving it.

    Michal
    Yes, you're right... In next version I'll add it... Now Ultra7z uses max 64 mb for LZMA and 512 Mb for PPMD...

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