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  1. #1
    Join Date
    Jan 2001
    Mobius Strip

    Lightbulb Photoshop


    The 4 Basic Hardware Principles of Photoshop Acceleration

    Drive Configurations for Photoshop

    Part 1: Use A Fast Startup Drive
    Part 2: Use A Second Drive For The Scratch Disk[/url]
    Part 3: Use A Fast RAID0 For The Scratch Disk[/url]
    Part 4: Use A Separate "Users" Drive[/url]
    Part 5: Use The "Work Disk/Scratch Disk Method"[/url]
    Part 6: Use A Striped RAID0 Startup Disk

    Machine-specific Photoshop Acceleration Strategy:

    Hard Drive Comparisons:
    74GB WD740 WesternDigital Raptor vs 160GB 7200.7 Seagate Barracuda
    74GB WD740 WesternDigital Raptor vs 300GB 7200.8 Seagate Barracuda

    Comparison of Photoshop Versions:

    Photoshop 7 versus Photoshop CS
    Photoshop Optimization
    Photoshop FAQ
    Photoshop Benchmarks (Discussion)
    Photoshop scratch RAID
    Photoshop Troubleshooting
    Photoshop Test Utility (benchmarking)

    Now, with CS2, we've got a situation where a really fast dual G5, boat loads of RAM, and the fastest possible startup disk are the prime ingredients for getting the best performance. Add to that the 4th part of the equation for those working with mongo files: a big, fast, and separate "Work Disk/Scratch Disk". For you particularly, I would suggest the WD/SD approach. In addition, max the RAM to 8GB.

    From Adobe:
    When you run Photoshop CS2 on a computer with a 64-bit processor (such as a G5, Intel Xeon processor with EM64T, AMD Athlon 64, or Opteron processor), and running a 64-bit version of the operating system (Mac OS v10.3 or higher, Windows XP Professional x64 Edition), that has 4 GB or more of RAM, Photoshop will use 3 GB for it's image data. You can see the actual amount of RAM Photoshop can use in the Maxiumum Used By Photoshop number when you set the Maximum Used by Photoshop slider in the Memory & Image Cache preference to 100%. The RAM above the 100% used by Photoshop, which is from approximately 3 GB to 3.7 GB, can be used directly by Photoshop plug-ins (some plug-ins need large chunks of contiguous RAM), filters, actions, etc. If you have more than 4 GB (to 6 GB (Windows) or 8 GB (Mac OS)), the RAM above 4 GB is used by the operating system as a cache for the Photoshop scratch disk data. Data that previously was written directly to the hard disk by Photoshop, is now cached in this high RAM before being written to the hard disk by the operating system. If you are working with files large enough to take advantage of these extra 2 GB of RAM, the RAM cache can speed performance of Photoshop.
    PS CS2's new scheme of caching scratch disk data in RAM works only under Tiger, not Panther. It's also why there appears to be less scratch disk activity with larger amounts of installed RAM. CS hit the 2GB limit pretty quick, but not so with CS2.

    .....But one still needs a really fast startup disk and a really fast scratch disk- especially for you jacob, because of the really large scratch disk file generated by those mongo image files of yours. It really wants to be on a separate drive from the system and user data. If you save the image file to the dedicated (no other files but CS2's temp file) scratch disk ala the "Work Disk/Scratch Disk Method", and it's a striped RAID of two or more drives, your operations will be quicker all around.

    CS2 with a Giga bump and OS X 10.3.9.

    Apparently there is a software conflict with the Giga Meter Extension and Adobe Creative Suite 2 resulting in what I described above. He said that they have worked on the issue and have a patch available, the correct version (1.0.1).

    Photoshop Performance
    Photoshop Performance Benchmark
    Photoshop Acceleration Basics 2 (pdf)
    Last edited by TZ; 06-04-2006 at 03:11 PM.

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