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32 Commits

Author SHA1 Message Date
Loic Dachary
8bf3971b7e rearrange the documentation to be inserted and maintained in master 
Signed-off-by: Loic Dachary <loic@dachary.org>
 2013-08-09 23:26:49 +02:00
Loic Dachary
980a07380d document the write / read path for erasure encoding 
Explains how objects are stored and used in erasure coded pools. It is
the result of discussions that occured on the ceph-devel mailing list
around june 2013. The rationale behind each change can be found in the
archive of the mailing list. For instance, the coding of the chunk
number with the object or the decision to decode using any K chunks
instead of trying to fetch the data chunks when possible because it
would allow simple concatenation when systematic codes are used.

http://tracker.ceph.com/issues/4929 refs #4929

Signed-off-by: Loic Dachary <loic@dachary.org>
 2013-08-09 09:42:31 +02:00
Loic Dachary
0304dfbc5f Add links to OSD internals related tracker items. 
Signed-off-by: Loic Dachary <loic@dachary.org>
 2013-08-05 15:36:28 +02:00
Loic Dachary
0d1040d798 Add links to scrub related tracker items. 
Signed-off-by: Loic Dachary <loic@dachary.org>
 2013-08-05 15:32:17 +02:00
Loic Dachary
349e7900a9 Add links to peering related tracker items. 
Signed-off-by: Loic Dachary <loic@dachary.org>
 2013-08-05 15:28:33 +02:00
Loic Dachary
423614777d Add links to recovery related tracker items. 
Signed-off-by: Loic Dachary <loic@dachary.org>
 2013-08-05 15:27:31 +02:00
Loic Dachary
128628824b Add links to backfill related tracker items. 
Signed-off-by: Loic Dachary <loic@dachary.org>
 2013-08-05 15:09:55 +02:00
Loic Dachary
160fa710ec fix typo 
Signed-off-by: Loic Dachary <loic@dachary.org>
 2013-08-05 15:09:42 +02:00
Loic Dachary
ac6f3b72a0 M+K means M data + K parity and implies M chunks necessary to recover 
Signed-off-by: Loic Dachary <loic@dachary.org>
 2013-08-05 15:08:49 +02:00
Samuel Just
826478cfde dev/osd_internals,src/osd: add erasure_coding.rst and PGBackend.h 
Signed-off-by: Samuel Just <sam.just@inktank.com>
 2013-08-02 16:05:50 -07:00
John Wilkins
72a6767eb3 doc: Added title. Suppresses no title warning messages. 
Signed-off-by: John Wilkins <john.wilkins@inktank.com>
 2013-06-04 15:33:42 -07:00
John Wilkins
145c480807 doc: Text of diagram for osd_throttles. 
Signed-off-by: John Wilkins <john.wilkins@inktank.com>
 2013-05-31 11:14:29 -07:00
John Wilkins
8d70c091d9 doc: Omitted text diagram, and used literal include to text file. 
Signed-off-by: John Wilkins <john.wilkins@inktank.com>
 2013-05-31 11:14:04 -07:00
Samuel Just
1c35556b56 doc/dev/osd_internals: add wbthrottle.rst 
Signed-off-by: Samuel Just <sam.just@inktank.com>
 2013-05-28 10:41:57 -07:00
Samuel Just
17a6e7faa7 doc/dev/osd_internals: add some info about throttles 
Signed-off-by: Samuel Just <sam.just@inktank.com>
 2013-05-21 12:51:20 -07:00
Loic Dachary
2a4425af0e reflect recent changes in the pg deletion logic 
No need to wait on DeletingStateRef for flush d3dd99b725
Fix typos

http://tracker.ceph.com/issues/5058 refs #5058

Signed-off-by: Loic Dachary <loic@dachary.org>
 2013-05-14 22:46:37 +02:00
Loic Dachary
1c53991e4c fix typos and add hyperlink to peering 
s/;/:/
s/up_acting_affected/acting_up_affected/
Add relative link to ../../peering

http://tracker.ceph.com/issues/5058 refs #5058

Signed-off-by: Loic Dachary <loic@dachary.org>
 2013-05-14 22:46:37 +02:00
Loic Dachary
b7d4012c06 typo s/come/some/ 
http://tracker.ceph.com/issues/5058 refs #5058

Signed-off-by: Loic Dachary <loic@dachary.org>
 2013-05-14 22:46:36 +02:00
Loic Dachary
dbddffef06 update op added to a waiting queue or discarded 
The decision to discard an op happens either in OSD or in PG.
The operation queue goes to a single OpWQ object if waiting_map does not impose a delay op_queue.
The decision to add an op to a waiting queue regardless of its type is updated.
The decision to add a CEPH_MSG_OSD_OP to a waiting queue is described in full.

http://tracker.ceph.com/issues/5058 refs #5058

Signed-off-by: Loic Dachary <loic@dachary.org>
 2013-05-14 22:44:58 +02:00
David Zafman
ea0e0c7e34 Merge branch 'wip-4273' 
Reviewed-by: Sam Just <sam.just@inktank.com>
 2013-05-10 16:45:34 -07:00
Samuel Just
0ef9b1e049 osd_internals/pg_removal.rst: update for pg resurrection 
Signed-off-by: Samuel Just <sam.just@inktank.com>
 2013-05-09 17:28:15 -07:00
David Zafman
00e903160b osd: prioritize recovery for degraded pgs 
Three Reservation priorities from RECOVERY, BACKFILL_HIGH, BACKFILL_LOW

fixes: #4273

Signed-off-by: David Zafman <david.zafman@inktank.com>
 2013-05-09 12:00:29 -07:00
David Zafman
09163a3bbc Add priority option to AsyncReserver class 
Add priority to request_reservation()
Change to map of lists by prioriry
Add priority to queue_pointers mappped type

Signed-off-by: David Zafman <david.zafman@inktank.com>
 2013-05-09 12:00:29 -07:00
Samuel Just
78db663ec7 osd_internals/snaps.rst: update description to reflect SnapMapper 
Signed-off-by: Samuel Just <sam.just@inktank.com>
 2013-03-13 19:45:08 -07:00
Samuel Just
ba449ce031 osd_internals/snaps.rst: add a description of snaps and trimming 
Signed-off-by: Samuel Just <sam.just@inktank.com>
 2013-03-13 18:48:24 -07:00
David Zafman
8ce26eaf02 Document scrubbing behavior 
Signed-off-by: David Zafman <david.zafman@inktank.com>
 2013-03-11 12:44:47 -07:00
Sage Weil
75ce88fb69 doc: fix rst for watch/notify internals 
Signed-off-by: Sage Weil <sage@inktank.com>
 2013-02-26 17:45:33 -08:00
Samuel Just
9a399afd71 doc: add some internal docs for watch/notify 
Signed-off-by: Samuel Just <sam.just@inktank.com>
 2013-02-20 13:29:20 -08:00
Mike Ryan
cdd73bbab0 doc/: document recovery reservation process 
Signed-off-by: Mike Ryan <mike.ryan@inktank.com>
 2012-11-07 17:21:32 -08:00
Samuel Just
3ebf52dfb5 doc/: added documentation for backfill_reservation 
Signed-off-by: Samuel Just <sam.just@inktank.com>
 2012-09-25 11:43:51 -07:00
Samuel Just
32892c1edd doc/dev/osd_internals: add newlines before numbered lists 
Signed-off-by: Samuel Just <sam.just@inktank.com>
 2012-07-17 16:51:57 -07:00
Samuel Just
24df8b1d82 doc/dev: add osd_internals to toc 
Signed-off-by: Samuel Just <sam.just@inktank.com>
 2012-07-17 09:54:47 -07:00