Changes between Version 3 and Version 4 of disk_alignment


Ignore:
Timestamp:
Mar 11, 2011, 4:51:48 AM (14 years ago)
Author:
Daniel Kahn Gillmor
Comment:

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  • disk_alignment

    v3 v4  
    11= Disk Alignment =
    22
    3 We use a complex stack of block device tools.  As it turns out, these tools will perform slightly better if they all agree on block boundaries.  Common block boundaries are powers of two, and the largest block boundaries i've heard of on modern equipment are 4MiB in size.  So this suggestion is to align on 4MiB boundaries (as that will also guarantee alignment on smaller power-of-two boundaries).
     3We use a complex stack of block device tools.  As it turns out, these tools will perform slightly better if they all agree on block boundaries.  Common block boundaries are powers of two, and the largest block boundaries i've heard of on modern equipment are 4MiB in size (in particular, this is [https://lwn.net/Articles/428584/ the eraseblock size on certain large flash devices]).  So this suggestion is to align on 4MiB boundaries (as that will also guarantee alignment on smaller power-of-two boundaries).
    44
    55== setting up ==