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The upcoming acl support wants to be able to get and set xattrs from callers who already have cluster locks and transactions. We refactor the existing xattr get and set calls into locked and unlocked variants. It's mostly boring code motion with the unfortunate situation that the caller needs to acquire the totl cluster lock before holding a transaction before calling into the xattr code. We push the parsing of the tags to the caller of the locked get and set so that they can know to acquire the right lock. (The acl callers will never be setting scoutfs. prefixed xattrs so they will never have tags.) Signed-off-by: Zach Brown <zab@versity.com>
Introduction
scoutfs is a clustered in-kernel Linux filesystem designed to support large archival systems. It features additional interfaces and metadata so that archive agents can perform their maintenance workflows without walking all the files in the namespace. Its cluster support lets deployments add nodes to satisfy archival tier bandwidth targets.
The design goal is to reach file populations in the trillions, with the archival bandwidth to match, while remaining operational and responsive.
Highlights of the design and implementation include:
- Fully consistent POSIX semantics between nodes
- Atomic transactions to maintain consistent persistent structures
- Integrated archival metadata replaces syncing to external databases
- Dynamic seperation of resources lets nodes write in parallel
- 64bit throughout; no limits on file or directory sizes or counts
- Open GPLv2 implementation
Community Mailing List
Please join us on the open scoutfs-devel@scoutfs.org mailing list hosted on Google Groups