mirror of
https://github.com/versity/scoutfs.git
synced 2026-07-21 07:22:31 +00:00
Auke Kok
cb40880f3d
Reproduce the freed-list commit deadlock and show a fixed server recovers. The alloc_fill_freed_list trigger stuffs both server_meta_freed heads to near-full in a single commit. It claims runs of free blocks and appends them straight into the head blocks, leaking whatever isn't used. Filling both heads in one commit makes the wedge reproducible. There's no window for the drain to empty one head before the other fills. An unfixed server is left with both heads full and wedges on the next commit. A fixed server drains them and stays live. Signed-off-by: Auke Kok <auke.kok@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