ZipStream V103f Update Announcement =================================== ZipStream - the next generation disk compression software for OS/2. V1.03f contains new compression and cacheing algorithms that significantly improve performance. V1.03f Update Information ========================= Fixes : 1. Allow file open with undocumented attribute from DOS session. 2. Restrict number of DOS directory search handles to prevent hang. 3. Correct file close problem that causes rc to fail. 4. Allow IOPL mode programs to access files. Improvements: 1. Improve file compression detection speed. V1.03e Update Information ========================= Fixes : 1. Correct file update problem from REXX. 2. Correct problem with zspack and very small files. Improvements: 1. Improve performance during startup, so that attachments occur earlier in the boot cycle. 2. Improve cache and compression performance. V1.03d Update Information ========================= Fixes : 1. Correct GCP performance problems by removing I/O priority boost. 2. Stop needless flushing of search cache which wakes up note books. Improvements: 1. Add '/r' option to zspack, so that compression ratio can be shown as a ratio rather than a percentage. 2. Change duty cycle on background compression boost so that system is more responsive. 3. No longer rebuild Desktop objects on install, so that user settings are preserved. ======================================================================== V1.03c Update Information ========================= Fixes : 1. Correct problem appending to a file that is being compressed. V1.03b Update Information ========================= Fixes : 1. Correct problem with moving files between two ZipStream paths. 2. Correct potential problem with reattach logic of zsattach. 3. Correct problem with copy file with EA's in DOS session using standard OS/2 command processor. 4. Correct problem with zsunpack decompressing files compressed with the /A option that had negative compression. 5. Correct problem with Workframe V1.1 opening project files. 6. Correct problem with Demon intermittently crashing on startup. 7. Correct problem with Recon, GCP and ZipStream. Improvements: 1. Improve performance during startup, so that attachments occur earlier in the boot cycle. 2. Improve install so that the config.sys is not needlessly updated. 3. Search cache is now persistent across boots, resulting in much improved directory search performance. 4. Search cache now uses a hash bucket hash probed segmented LRU algorithm for improved performance. 5. I/O priority boost now feed back into requesting threads for improved performance. 6. Background compression on diskettes is now given priority. ======================================================================== Introducing ZipStream ZipStream is an exciting new concept in automatic file compression, that harnesses the power and features of OS/2 2.X and Warp. ZipStream is the safe disk compression software for OS/2 2.1 and Warp. It is an OS/2 Installable File System (IFS) that mirrors access to existing OS/2 File Systems, and simultaneously provides automatic, transparent file compression and decompression. Its 32 bit implementation exploits OS/2's pre-emptive multi-threaded processing capabilities, which allows for complex processing to be carried out in the most optimum manner. ZipStream's transparent background compression operations and intelligent caching techniques means there is no noticeable loss in system performance. ZipStream's Features * Supports HPFS and FAT File Systems. Any OS/2 supported file system can be utilised. * Supports Diskettes. Diskettes don't have to be specially formatted, just attach and compression is available. * Supports LAN File Systems. Any LAN file system that is mapped as a drive letter can be used for compression operations. Additionally, there are no Server overheads, as all compression operations are performed by the workstation. * Supports Long File Names. No restrictions are imposed other that those imposed by OS/2's native File Systems. * Supports Extended Attributes. Full support of Extended attributes and compatible with OS/2's Workplace Shell. * Automatic Compression of New Files. Newly created files or any files copied to the compressed drive letter are automatically and transparently compressed. * File Based Compression not Disk Based. Being file based, you have complete control of what files are compressed and what are not, that is, uncompressed files can reside on the compressed drive. * Ultra High Compression Ratios. Using state of the art and background compression techniques yields compression ratios equal to that of popular archiving programs. * Native OS/2 32 bit Application. This isn't a port of a DOS compression application, it's been built specifically for OS/2 and designed to get the most out of OS/2. * Outstanding Performance. Background compression and 32 bit code gives real pay offs in performance. * No Reformatting Required. Just attach to a driver letter or path and compression is available. * No Container Files. Using existing File systems means reliability and safety. System Requirements If you are capable of running OS/2 2.1 or higher, you can take advantage of ZipStream. In case you're still unsure, ZipStream has the following requirements: * A PC that is supported, and is capable of running OS/2 2.1 or higher. * At least 4 MB of RAM, 8 MB recommended, 16 MB perfect. * At least 10 MB of swap area is recommended. * A 386 or better CPU, 486 highly recommended, Pentium outstanding. Available from ============== Office Solutions Ph: (310) 439 5567 404 Termino Avenue Fax: (310) 438 7888 Long Beach CA 90814 USA Minzloff Data Ph: [41] (61) 261 4459 Leonhardsberg 16 Fax: [41] (61) 261 4451 CH - 4051 Basel Switzerland Multitask Consulting Ph: [61] (2) 904 1988 162 Ben Boyd Road Fax: [61] (2) 953 9401 Neutral Bay NSW 2089 Australia OS/2 Express Ph: 1-800-OS2-KWIK 4604 Chicago Ave 1-800-672-5945 Minneapolis, MN 55407 or (612) 823-6255 USA Carbon Based Software Ph: [61] (75) 37 1949 PO Box 912 Fax: [61] (75) 29 1544 Runaway Bay Qld 4126 CompuServe 100351,2052 Australia ZipStream is a trademark of Carbon Based Software. IBM and OS/2 are trademarks of International Business Machines Corporation. Pentium is a trademark of Intel Corporation.