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The New Linux Speed Trick

Posted by CmdrTaco on from the benchmarking-the-beast dept.

Brainsur quotes a story saying " Linux kernel 2.6 introduces improved IO scheduling that can increase speed -- "sometimes by 1,000 percent or more, [more] often by 2x" -- for standard desktop workloads, and by as much as 15 percent on many database workloads, according to Andrew Morton of Open Source Development Labs. This increased speed is accomplished by minimizing the disk head movement during concurrent reads. "

1 of 426 comments (clear)

  1. Re:SCSI by jesup · · Score: 5, Insightful

    ATA is definitely not SCSI-over-IDE.
    ATAPI is SCSI-over-IDE however.

    I wrote the IDE/ATA drivers for the Amiga. The Amiga SCSI drivers accepted "SCSIDirect" commands from applications. Internally, all IO commands were converted to SCSIDirect commands for execution. To implement ATA, I added a SCSIDirect->ATA translator (which wasn't that hard - about 3 weeks from start to working, booting system - and I implemented just about all SCSI commands even semi-reasonable (all of CCS I think, plus quite a bit).

    Doing it this way made implementing support for ATAPI CDROMs (something I did as a contract after Commodore folded) Very Easy. :-)