mirror of
https://github.com/versity/scoutfs.git
synced 2026-04-29 17:36:55 +00:00
d8231016f8
After we've merged a log btree back into the main fs tree we kick off work to free all its blocks. This would fully fill the transactions free blocks list before stopping to apply the commit. Consuming the entire free list makes it hard to have concurrent holders of a commit who also want to free things. This chnages the log btree block freeing to limit itself to a fraction of the budget that each holder gets. That coarse limit avoids us having to precisely account for the allocations and frees while modifying the freeing item while still freeing many blocks per commit. 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