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Auke Kok
ce3be8b5f5
Add trace events to aid debugging recovery stalls:
- scoutfs_recov_prepare(sb, rid, which):
Server registered that a client needs to recover something.
- scoutfs_recov_finish(sb, rid, which, remaining):
Client finished one recovery item, and lists remaining count.
- scoutfs_recov_timeout_fire(sb, nr_pending):
The 30s recovery window expired, with count of clients that
failed to recover within the timeout.
- scoutfs_recov_fence_rid(sb, rid):
One event per client about to be fenced.
- scoutfs_lock_server_greeting(sb, rid, recov_pending):
Shows which rid we expect to recover locks.
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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