Summary

Use/Applications

Technical

Pocket Soft's Bona Fides

More Information

Technology

• New generation byte-level differencing designed for use by F1000 and Government.
• Windows, Linux, Unix
• Native 32-bit, Native 64-bit
• Product Includes: differencing engine, client side apply software with source code and SDK
• Lossless compression, 100% identical restoration
• Compression ratios depend on the number and pattern of changes. Typical values are 90-95%. Values of 99% are not unusual.
• dfc-gorilla may be used in multiple simultaneous instances without adversely affecting the running operations of the system. Previous byte-level difference algorithms were designed to run as a single instance on a dedicated machine.
• Linear build time: The time to identify and encode the byte-level differences between files is linear with respect to input file sizes. Previous byte-level difference engines required quadratic runtimes.
• Sequential file access: dfc-gorilla uses a single read pass during data comparison, with no backward seeks. Ideal for situations that involve costly seeks (tape media), or in cases where back-seeking is not possible (streaming), this file access approach is unlike any previous byte-level difference technology.
• Memory and other system resources are limited and definable. All of the resource requirements of dfc-gorilla are independent of the sizes or numbers of files upon which it operates. In addition, the actual amount of various resources may be defined. As little as 32-64MB of RAM and no temporary disk space, is required.
• Memory is limited and chosen by the developer: Typically 32-64MB. Can be as little as 16MB. Previous byte-level difference engines required memory equal to 1.5x the size of the old and new files combined. When the requirement exceeded available memory, a swap to disk or unrecoverable error would occur.
• Other resources: Previous byte-level difference engines required temporary disk space and swap file space. dfc-gorilla requires none.