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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