Along with piles, sources said Panther will include enhancements to the Mac OS file system that build on the journaling capabilities Apple introduced in November 2002 with the introduction of the server version of Mac OS X 10.2.2. The journaling technology extends OS Xs HFS+ file system and can be applied to current Mac OS volumes without reformatting. Users of Mac OS X Server can activate journaling by clicking on a "Make journaled" button within the Disk Utility application; they can also access it via the command line or remotely via a Secure Shell (SSH) connection.Sources said Panther will add more database-like structures to the file system, although the underlying file system will remain HFS+, ensuring backward compatibility. On the performance front, sources said Apple engineers are racing to improve I/O performance and other factors, although they cautioned that the improvements may not be as dramatic in Panther as they were in the jump from Mac OS X 10.1 to Version 10.2. However, Apple has also given its engineers several more weeks of development time before the freeze for new features and user interface changes. Apple in March announced that it has moved back the 2003 edition of its Worldwide Developers Conference from May to June to prepare a preview release of Panther. Sources also said Apple will provide full 64-bit support in Panther, exciting speculation that the company will use WWDC as the occasion to unveil Mac hardware that will tap the PowerPC 970, IBMs new 64-bit processor. If so, the September ship date for Panther is also a likely milestone for the release of new Mac systems. A spokesperson for Apple could not be reached for comment. eWEEK first reported in August 2002 the Panther sobriquet, which continues the feline marketing theme Apple initiated that month with the release of "Jaguar," a k a Mac OS X 10.2. Panther will mark the third significant upgrade to Mac OS X since its debutand the fourth big cat from Apple. The initial Mac OS X release bore the internal code name Cheetah, and Mac OS X 10.1, which shipped in September 2001, was referred to internally as Puma, although neither moniker was ever publicized. (Mac OS X 10.2 Server was code-named Tigger, sources said, another sobriquet that never saw the light of day.) Latest Apple News:
The journaling scheme in Mac OS X 10.2.2 automatically logs file system transactions to guarantee file system consistency in the event of a crash. Journaled systems can retrieve lost data by consulting the "journal" log, restoring the system to its previous state instead of having to go through the lengthy process of rebuilding it with disk-check utilities like Unixs file system consistency check, a BSD command that works with HFS file systems.