WinRAR - one of the most known archivers. Besides that it supports backing up in RAR format, the program can work with archives ZIP, CAB, ARJ, LZH, TAR, GZ, ACE 2.0, BZIP, JAR, UUE, GZIP, BZIP2 and 7-Zip, while it has many very useful features encryption, support of continuous solid archives in which the degree of compression can be 10 to 50% more than conventional methods of compression, a special algorithm to compress media files, support for multi-volume archives, and many others. Opportunities WinRAR: Original packing algorithm, providing the high level of compression executable files, object libraries, large text files, etc.
Additional algorithm optimized for the compression of multimedia data.
Supports files and archives up to 9 223 372 036 854 775 807 byte (8 exabytes), provided that its file and operating systems also support this size. The amount of added to the archive file is practically unlimited.
Full support for RAR and ZIP archives 2.0 unpacking of archives CAB, ARJ, LZH, TAR, GZ, ACE, UUE, BZ2, JAR, ISO, Z, and 7Z.
Support permissions and NTFS data streams.
Opportunity to use it as interactive Windows interface and the command line interface.
The possibility of creating a 'continuous' (solid) archives, compression ratio which is 10-50% higher than in regular archives, particularly when packing large numbers of similar small files.
Creating and modifying self-extracting (SFX) archives with the help of standard and optional modules SFX.
Create tape archives, including self-extracting.
A lot of additional functions, for example, file encryption, adding archival comments and recovering physically damaged archives. Changes in version 4.20:
Changes in the RAR compression:
overall the RAR compression algorithm is optimized for more efficient use processors with multiple cores. Growth velocity is possible even in single CPU mode, but the best results are achieved in a multi-core environment. Increase the speed depends on the type of data and average size of the files. Multiple cores are used more effectively the large compressed files.
in order to increase the speed of compression, we had to increase the memory requirements. Total RAR compression algorithm consumes about 120 MB, whereas in WinRAR 4.11 this value was 40 MB
compression algorithm texts RAR cannot effectively utilize multiple CPU cores, so its speed in a multiprocessor environment is much lower than in the General compression algorithm. In addition, he is much lower than in the General algorithm, and speed when unpacking, regardless of the number of CPUs. So we decided to disable the default compression algorithm texts. If you need maximum compression simple text data, and the speed is not important, you can include a text compression algorithm in the Advanced settings dialog box compression". To call this window, in archiving dialog box, navigate to the tab "Advanced" and click "compression Options...". In addition, you can change the value of this parameter continuously in the compression profile, the default. When using the command-line mode compression text activates the key-mct-
compression mode "Speed" (-m1) also now uses multiple processor cores. In version 4.11 this mode is used only one CPU core.
Slightly raised decompression speed when you use a common algorithm for RAR, although not as much as when compressing. Unpacking RAR cannot use multiple processor cores, so its speed does not depend on their number.
Changes in ZIP compression:
now the ZIP compression algorithm supports multiple processor cores, so the speed of its work in a multi-core environment has become much higher. In single-processor systems, ZIP compression faster than version 4.11-
memory consumption when compressed ZIP increased to around 15 MB.
Operations for creating and maintaining recovery volumes can use multiple CPU cores and thus run faster. However, because that limits the speed factor here - low speed of the search of the hard drive, the gain in performance will be stronger visible in a solid state (SSD) drive.
Now in the key-mt can specify the values 1 - 32 and not 0 - 16, as it was before.
The command "Find files" can search for data in the archives of 7-Zip. Previously .7z archive format command "Find files is not supported.
WinRAR and modules WinRAR self-extracting no longer support Windows 2000.
the Button "Save current settings to a standard dialog box "Advanced SFX options" now is only available when converting an existing archive in SFX. The parameters stored this button, apply only to perform the conversion to SFX. When creating or updating the SFX archive is used only SFX options from the profile compression, which is accepted by default. The settings that are stored in the dialog box "Advanced SFX options", in operations create/update are not used.