CephFS Code Walkthroughs » History » Revision 63
Revision 62 (Patrick Donnelly, 06/05/2023 01:09 PM) → Revision 63/65 (Venky Shankar, 03/21/2024 01:15 PM)
h1. CephFS Code Walkthroughs
The CephFS Code Walkthrough meetings will be used to establish a durable knowledge base for CephFS developers.
This weekly meeting will occur every *Monday at 9 AM EDT* at: https://meet.jit.si/cephfs-code-walkthroughs
* "Ceph Community calendar": https://ceph.io/contribute/#community-calendar
* "Google Calendar": https://calendar.google.com/calendar/b/1?cid=OXRzOWM3bHQ3dTF2aWMyaWp2dnFxbGZwbzBAZ3JvdXAuY2FsZW5kYXIuZ29vZ2xlLmNvbQ
* "iCal": https://calendar.google.com/calendar/ical/9ts9c7lt7u1vic2ijvvqqlfpo0%40group.calendar.google.com/public/basic.ics
Developers may pick a topic from the below list or create their own.
h2. Scheduled Topics
* 2024-03-25: Patrick: Monitor upgrades - sequence and handling feature compass
* 2023-06-12: Patrick: minor log segments (rescheduled due to recording uncertainty)
h2. Open Topics
* High-level Overview of the MDS (overall design, function and flow)
* Capability Revoke
* Capability Grant
* cephfs-data-scan
* MDS Scrub
* MDS path traversal
* Client path traversal
* MDS Balancer (!Migration)
* MDS Migrator
* MDS Locker (break up as necessary, very large topic)
* MDS MDCache rejoin
* MDS MDCache resolve
* MDS CDir (directory fragment)
* MDS CDir Fragment/Merge
* MDS Subtree management
* MDS OpenFileTable
* MDS <-> MDS messages
* Client auth MDS picking for requests
* MDS Journal on-disk format (cephfs-journal-tool examples)
* MDS on-disk metadata format (CInode, CDir, CDentry)
* rstats
* MDS session map (reset too as part of disaster recovery)
* MDSMap/FSMap
* MDS journal trimming
* MDS Stray directory / hard link reintegration
* MDS stats reporting (MDSPinger/MetricAggregator/MetricsHandler)
* MDS Context (within MDS and Ceph in-general)
* osdc/Journaler
* osdc/Filer + osdc/ObjectCacher
* Snapshots
h2. Past Topics
* 2022-05-16: Jeff: kernel client overview - https://www.youtube.com/watch?v=ecbtfgumG34
* 2022-01-24: Patrick: fs:upgrade suite
* 2021-11-22: Venky Shankar - MDS Locker, Part 2 - https://www.youtube.com/watch?v=Ah4H3apSvXw
* 2021-11-15: Jeff Layton - kclient overview - https://www.youtube.com/watch?v=kXFsDwoRuyM
* 2021-09-27: Patrick Donnelly - MDS Journal Machinery - https://www.youtube.com/watch?v=yB5JvIvZ764
* 2021-08-09: Milind Changire - rstats https://www.youtube.com/watch?v=85lnSSfXkBk
* 2021-07-26: Kotresh HR - MDS path traversal https://www.youtube.com/watch?v=dYJ84qpR0kY
* 2021-07-19: Venky Shankar - MDS Locker, Part 1 https://www.youtube.com/watch?v=jkWJ6x_Bz-s
* 2021-05-03: Patrick Donnelly - MDSMonitor https://www.youtube.com/watch?v=rUJZy-2jKOo
* 2021-04-26: Venky Shankar - cephfs-mirror daemon part 2: https://www.youtube.com/watch?v=oMs7appb20s
* 2021-04-19: Venky Shankar - CephFS Mirroring https://www.youtube.com/watch?v=nZSN1zkSXSs