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CephFS Code Walkthroughs » History » Version 57

Ramana Raja, 05/31/2022 12:25 PM

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h1. CephFS Code Walkthroughs
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The CephFS Code Walkthrough meetings will be used to establish a durable knowledge base for CephFS developers.
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This weekly meeting will occur every *Monday at 14:00 UTC / 10 AM EDT* at: https://bluejeans.com/908675367
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* "Ceph Community calendar":https://ceph.io/contribute/#community-calendar
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* "Google Calendar":https://calendar.google.com/calendar/b/1?cid=OXRzOWM3bHQ3dTF2aWMyaWp2dnFxbGZwbzBAZ3JvdXAuY2FsZW5kYXIuZ29vZ2xlLmNvbQ
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* "iCal":https://calendar.google.com/calendar/ical/9ts9c7lt7u1vic2ijvvqqlfpo0%40group.calendar.google.com/public/basic.ics
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Developers may pick a topic from the below list or create their own.
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h2. Scheduled Topics
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* 2022-01-24: Patrick: fs:upgrade suite
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h2. Open Topics
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* High-level Overview of the MDS (overall design, function and flow)
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* Capability Revoke
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* Capability Grant
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* cephfs-data-scan
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* MDS Scrub
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* MDS path traversal
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* Client path traversal
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* MDS Balancer (!Migration)
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* MDS Migrator
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* MDS Locker (break up as necessary, very large topic)
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* MDS MDCache rejoin
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* MDS MDCache resolve
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* MDS CDir (directory fragment)
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* MDS CDir Fragment/Merge
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* MDS Subtree management
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* MDS OpenFileTable
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* MDS <-> MDS messages
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* Client auth MDS picking for requests
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* MDS Journal on-disk format (cephfs-journal-tool examples)
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* MDS on-disk metadata format (CInode, CDir, CDentry)
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* rstats
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* MDS session map (reset too as part of disaster recovery)
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* MDSMap/FSMap
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* MDS journal trimming
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* MDS Stray directory / hard link reintegration
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* MDS stats reporting (MDSPinger/MetricAggregator/MetricsHandler)
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* MDS Context (within MDS and Ceph in-general)
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* osdc/Journaler
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* osdc/Filer + osdc/ObjectCacher
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* Snapshots
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h2. Past Topics
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2022-05-16: Jeff: kernel client overview - https://www.youtube.com/watch?v=ecbtfgumG34
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2021-11-22: Venky Shankar - MDS Locker, Part 2 - https://www.youtube.com/watch?v=Ah4H3apSvXw
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2021-11-15: Jeff Layton - kclient overview - https://www.youtube.com/watch?v=kXFsDwoRuyM
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2021-09-27: Patrick Donnelly - MDS Journal Machinery - https://www.youtube.com/watch?v=yB5JvIvZ764
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2021-08-09: Milind Changire - rstats https://www.youtube.com/watch?v=85lnSSfXkBk
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2021-07-26: Kotresh HR - MDS path traversal https://www.youtube.com/watch?v=dYJ84qpR0kY
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2021-07-19: Venky Shankar - MDS Locker, Part 1 https://www.youtube.com/watch?v=jkWJ6x_Bz-s
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2021-05-03: Patrick Donnelly - MDSMonitor https://www.youtube.com/watch?v=rUJZy-2jKOo
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2021-04-26: Venky Shankar - cephfs-mirror daemon part 2: https://www.youtube.com/watch?v=oMs7appb20s
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2021-04-19:  Venky Shankar - CephFS Mirroring https://www.youtube.com/watch?v=nZSN1zkSXSs