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Thu, 29 Mar 2007
The 2007 Linux Storage and File Systems Workshop.
LWN article
and wiki notes.
Interesting notes:
- extended attributes must have variable lengths to satisfy various usage cases (crypto, ACL)
- fsck is evil, it can be fixed by changing meta-data location to eliminate seeks
- disk encryption should not depend on external subsystems like SELinux
- stackable filesystems work badly when underlying filesystem in the stack is modified directly
- ShadowFS - way to use some kind of write-anywhere-filesystem-layout - when data is being written
into the file, old data is not owerwritten, but instead write happens into different area on disk,
so system is never in inconsistent state if there were some errors (power failure, shutdown and so on
- a short description of several filesystems (NFS, GFS2, OCFS2, DualFS) and eXplode - bug searching tool,
which is known to help finding bugs in every Linux filesystem recently
As an interesting short-time task I started to implement a userspace model of the hard drive -
it will map the storage and have different access models for read/write/seek disk operations.
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