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OneFS Distributed File System: Distributed File System, List of File Systems, Andrew File System
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Dieser Artikel gilt, aufgrund seiner Grösse, beim Versand als 2 Artikel!
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| Please note that the content of this book primarily consists of articles
available from Wikipedia or other free sources online. The OneFS file
system is a distributed networked file system designed by Isilon Systems
for use in its Isilon IQ storage appliances.All data structures in the
OneFS file system maintain their own protection information. This means
in the same filesystem, one file may be protected at +1 (basic parity
protection) while another may be protected at +4 (resilient to 4
failures) while yet another file may be protected at 2x mirroring. This
feature is referred to as FlexProtect. Blocks for an individual file are
spread across the nodes. For example, block 0 may be on node 3, block 1
on node 1, and the related parity block on node 5. This allows entire
nodes to fail without losing access to any data. File metadata,
directories, snapshot structures, quotas structures, and a logical inode
mapping structure are all based on mirrored B+ trees. Block addresses
are generalized 64 bit pointers that reference (node, drive, blknum)
tuples. The native block size is 8192 bytes. Inodes are 512 bytes on
disk. |
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