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Release note of version 1.3.2.0

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Yutaka-Sawada
2021-12-20 13:40:26 +09:00
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# MultiPar # MultiPar
v1.3.1.9 is public v1.3.2.0 is public
  This is the final release of v1.3.1 tree.   This is a beta version to test new encoder & decoder.
There would be no serious problem. I implemented a way of Cache Blocking for CPU's L3 cache optimization.
While I fixed some rare bugs and improved a bit, it's hard to test all possible cases. It will calculate multiple blocks at once on multi-Core CPU.
When you see a bug, odd incident, or strange behavior, please let me know. Old method calculated each block independently,
I will fix as possible as I can. and could not avail the advantage of shared memory.
New method may use shared L3 cache more often, and will be fast on recent PCs.
  I tested verification of multiple source files on my new PC.   Thanks [prdp19 and Slava46](https://github.com/Yutaka-Sawada/MultiPar/issues/47) for many tests.
From the result, I set max number of threads for NVMe SSD to 4 threads, Thanks [Anime Tosho](https://github.com/Yutaka-Sawada/MultiPar/issues/21) for some idea and advice.
when CPU has 6 or more logical cores. Also, other users aided my development.
This will improve speed at verifying complete source files. Without their help, I could not perform this speed improvement.
(It doesn't affect for PAR files nor damaged files.)
SATA SSD : It will verify max 2 files at once.
NVMe SSD : It will verify max 3 or 4 files at once.
  When many input file slices are same, their checksums become same, too.   While new version seems to be faster on most cases,
There was a bug in my sorting function. it may happen to be slow for a few blocks.
Nobody found the error for over than 10 years, and I solved this problem at last. Though I don't know the speed on old PCs, it may not become slow.
Thanks [NilEinne](https://github.com/Yutaka-Sawada/MultiPar/issues/36) for reporting the very rare incident. If you see a failure or strange result, please report the incident with ease.
I will try to solve as possible as I can.
  When a file includes duplicated data, it's difficult to find slices in proper position.   I adjusted CPU usage slider for CPUs with many Cores.
In old versions, it might ignore overlap of slices for speed. Now, each position will set different number of threads always.
Then, it happend to fail finding some slices. Left most : 1/4 of CPU cores
I implemented more complex method, and it will work well in most cases. One from left : 2/4 of CPU cores
Thanks [swarup459](https://github.com/Yutaka-Sawada/MultiPar/issues/42) for bug report, offering samples, and many tests. Middle : 3/4 of CPU cores
One from right : 4/4 of CPU cores, or use one less threads on CPU with 6 or more Cores.
Right most : May use one more threads on CPU with 5 or less Cores.
  It's possible to add PAR2 recovery record to a ZIP file.   I improved calculating hash of multiple source files.
When I wrote the instructions ago, 4 GB over ZIP file was not common so much. From my testing result, I changed default number of threads for NVMe SSD.
Because recent Windows OS supports ZIP64 format, I updated the text for compatibility. When you use a raid-system or external drive, it cannot detect the drive type.
You may read the "Add recovery record" page of MultiPar's Help documents. If it fails to detect, it uses HDD mode by default.
Or, you may read [the article on my web-site](http://hp.vector.co.jp/authors/VA021385/record.htm). At MultiPar options, it's possible to change the setting manually.
Now, MultiPar supports large ZIP file with ZIP64 format. You may select one of them; HDD, SSD, or Fast SSD.
Thanks [Dwaine Gonyier](https://github.com/Yutaka-Sawada/MultiPar/issues/44) for noticing the potential problem. Caution, you should not select SSD, if your using drive is HDD.
[ Changes from 1.3.1.8 to 1.3.1.9 ] [ Changes from 1.3.1.9 to 1.3.2.0 ]
Installer update
- Inno Setup was updated from v6.1.2 to v6.2.0.
GUI update GUI update
- Change - Change
- Clickable link to access author's page becomes SSL. - Fast SSD is selectable as file access mode.
- Appending recovery record supports 2 GB over file size. - Max number of log files was increased from 100 to 1000.
- CPU usage slider was adjusted on CPU with 6 or more Cores.
- Shadow of text over progress-bar becomes more smooth.
PAR2 clients update PAR2 client update
- Change - Change
- When source files are on NVMe SSD, verification may become faster. - Standard buffer size becomes double to decrease iteration.
- Appending recovery record supports ZIP64 format. - Single byte error in a single slice file may be corrected.
- Number of using threads was changed on CPU with 6 or more Cores.
- Enabling GPU won't use additional threads on multi-core CPU.
- Progress percent may move while writing blocks.
- Improvement - Improvement
- Simple verification will find a short slice in a tiny file. - L3 cache optimization was implemented for multi-core CPU.
- Bug fix
- A stack overflow problem in quick sort function was removed.
- A bug of searching slices in a file with repeated content was fixed.
[ Hash value ] [ Hash value ]
MultiPar131.zip MultiPar1320.zip
MD5: EF3486BB39724EF6A4109F5B02D4E027 MD5: 56524875BC77FD7A4E51A9E2C3F834CB
SHA1: D935BFAFF5156C9460FB45639271339D1068F522 SHA1: 245F3432DBCCAD335AEB2A70371EE57EFEF52CE7
MultiPar131_setup.exe MultiPar1320_setup.exe
MD5: E2F6EF68AEB9BE0CCDD4D5ABF2A3F318 MD5: 5D0A51F48CDE8FCB0B87CC949BE84DD1
SHA1: C2615960B9B28223BC174FC1175CAAECCC8A713A SHA1: B727D5193697E8C0A2335DB8233874CBDAFDEE40
  To install under "Program Files" or "Program Files (x86)" directory,   To install under "Program Files" or "Program Files (x86)" directory,
you must start the installer with administrative privileges by selecting you must start the installer with administrative privileges by selecting
"Run as administrator" on right-click menu. "Run as administrator" on right-click menu.
@@ -78,9 +77,9 @@ you must start the installer with administrative privileges by selecting
[GitHub](https://github.com/Yutaka-Sawada/MultiPar/releases) or [GitHub](https://github.com/Yutaka-Sawada/MultiPar/releases) or
[OneDrive](https://1drv.ms/u/s!AtGhNMUyvbWOaSo1n_R8awJ_hg0?e=4V0gXu). [OneDrive](https://1drv.ms/u/s!AtGhNMUyvbWOaSo1n_R8awJ_hg0?e=4V0gXu).
MultiPar_par2j_1319.7z MultiPar_par2j_1320.7z
MD5: 9AC4C38762E2DBF64D6D3A738CD7CCD6 MD5: 5DBF880047D05BC2E8FE349DC6EC610C
SHA1: FFC0DA1A0BBCAD08489C5499154DAA0216E10F51 SHA1: 1D50EFE97A7812B6AF0090B83AAEE61BCBABD1ED
MultiPar_par1j_1318.7z MultiPar_par1j_1318.7z
MD5: F66285403BA0AD856BA6A8CCD922EBF5 MD5: F66285403BA0AD856BA6A8CCD922EBF5
@@ -90,14 +89,14 @@ MultiPar_sfv_md5_1318.7z
MD5: 4E6433808625C088E2773C961BBEBBD2 MD5: 4E6433808625C088E2773C961BBEBBD2
SHA1: 68B54D178BA58637F63CC3E0CC656C96D4472A33 SHA1: 68B54D178BA58637F63CC3E0CC656C96D4472A33
MultiPar_ShlExt_1318.7z MultiPar_ShlExt_1320.7z
MD5: 57E79698A53458681CD19842391A202F MD5: C413655ABF85BCFF3D4B349BAAADC24B
SHA1: 646145F1B429C1CF592F907614889C98FBE7E756 SHA1: 8552E6CCF647B065D91E494D2751567C144ABD36
MultiPar_ResUI_1319.7z MultiPar_ResUI_1319.7z
MD5: E03B90A433466C945D726B5A49B4E547 MD5: E03B90A433466C945D726B5A49B4E547
SHA1: E30FB11B8F121D44CC1CC368E8D91F06CFC15551 SHA1: E30FB11B8F121D44CC1CC368E8D91F06CFC15551
MultiPar_Help_1319.7z MultiPar_Help_1320.7z
MD5: 37547FA074DC24491D1696F6F0DB7452 MD5: 1F8CC009B1A5F11EFBA999C7225E4311
SHA1: 8069C5745F9C7660236F17E3E087B4F7324382ED SHA1: 6E392602F82A96E3015FEA65A590E08D2B6E39CB