On 9/22/2010 4:12 PM, Phillip Susi wrote:> Is there currently a way to view and manipulate the chunks? If I
> understand things correctly, a new fs has a few chunks:
>
> 1) System chunk. Contains tree of trees, device tree, chunk tree.
> 2) Metadata chunk. Contains the directory tree for the default subvol,
> and any additional subvols/snapshots you create. Directory entries and
> inodes are in this tree.
> 3) Data chunk. Files with significant data have blocks allocated from
> this chunk.
>
> The system chunk is always mirrored, even on a single disk. The
> metadata chunk is mirrored by default, but can be changed with a
> parameter to mkfs. The data chunk is striped by default, but can be
> changed via parameter to mkfs. The chunks are all expanded as needed.
> Is this correct, and is there a way to create a subvol with a new pair
> of metadata/data chunks and specify how they should be striped or
> mirrored across what devices?
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