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4a0b14a4f2
The orphan inode test often uses a trick where it runs sleep in the abckground with a file as stdin as a means of holding files open. This can very rarely fail if the background sleep happens to be first schedled after the unlink of the file it's reading as stdin. A small delay gives it a chance to run and open the file before its unlinked. It's still possible to lose the race, of course, but so far this has been good enough. 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
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