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2bebab4873
It's possible for a srch compaction to collapse down to nothing if given evenly paired create/delete entries. In this case, we were emitting an empty block. This could cause problems for search_sorted_file(), which assumes that every block it sees has a valid first and last entry. Fix this by keeping a temp entry and only emitting it if it differs from the next entry in the block. Be sure to flush out a straggling temp entry if we have one when we're done with the last block of the merge. Signed-off-by: Chris Kirby <ckirby@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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