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5e2009f939
Readers currently accumulate all finalized log tree deltas into a single bucket for deciding whether they are already in fs_root or not, but, finalized trees that aren't inputs to a current merge will have higher seqs, and thus we may be double applying deltas already merged into fs_root. To distinguish, scoutfs_totl_merge_contribute() needs to know the merge status item seq. We change wkic's get_roots() from using the SCOUTFS_NET_CMD_GET_ROOTS RPC to reading the superblock directly. This is needed because totl merge resolution has to use the same data as the btree roots it is operating on, thus we can't grab it from a SCOUTFS_NET_CMD_GET_ROOTS packet - it likely is different. 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
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