Sunday, March 9, 2014

Striping Inside the Volume

Inside a volume, space is allocated based on:

  • Stripe column – the number of stripes (default 4)
  • Stripe width – the size of each stripe (default 128 KB)

Stripe column and stripe width are properties that are set when you create the volume.

The stripe column is used both for allocating the initial space for the volume but also for the way the space inside the volume is used.

The volume will be formatted for a file system. As the file system allocates space for files, the files will be stored in pieces the size of stripe width.

If defaults are used, they are stored in 128 KB pieces. Each piece goes into the next volume extent. Because the volume extents are placed on disks in the disk group in the same manner, as the pieces are placed in the extents, the pieces are spread across the disks in the disk group.

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