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Diffstat (limited to 'doc/dev/osd_internals/scrub.rst')
| -rw-r--r-- | doc/dev/osd_internals/scrub.rst | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/doc/dev/osd_internals/scrub.rst b/doc/dev/osd_internals/scrub.rst new file mode 100644 index 000000000..149509799 --- /dev/null +++ b/doc/dev/osd_internals/scrub.rst @@ -0,0 +1,41 @@ + +Scrub internals and diagnostics +=============================== + +Scrubbing Behavior Table +------------------------ + ++-------------------------------------------------+----------+-----------+---------------+----------------------+ +| Flags | none | noscrub | nodeep_scrub | noscrub/nodeep_scrub | ++=================================================+==========+===========+===============+======================+ +| Periodic tick | S | X | S | X | ++-------------------------------------------------+----------+-----------+---------------+----------------------+ +| Periodic tick after osd_deep_scrub_interval | D | D | S | X | ++-------------------------------------------------+----------+-----------+---------------+----------------------+ +| Initiated scrub | S | S | S | S | ++-------------------------------------------------+----------+-----------+---------------+----------------------+ +| Initiated scrub after osd_deep_scrub_interval | D | D | S | S | ++-------------------------------------------------+----------+-----------+---------------+----------------------+ +| Initiated deep scrub | D | D | D | D | ++-------------------------------------------------+----------+-----------+---------------+----------------------+ + +- X = Do nothing +- S = Do regular scrub +- D = Do deep scrub + +State variables +--------------- + +- Periodic tick state is ``!must_scrub && !must_deep_scrub && !time_for_deep`` +- Periodic tick after ``osd_deep_scrub_interval state is !must_scrub && !must_deep_scrub && time_for_deep`` +- Initiated scrub state is ``must_scrub && !must_deep_scrub && !time_for_deep`` +- Initiated scrub after ``osd_deep_scrub_interval`` state is ``must_scrub && !must_deep_scrub && time_for_deep`` +- Initiated deep scrub state is ``must_scrub && must_deep_scrub`` + +Scrub Reservations +------------------ + +An OSD daemon command dumps total local and remote reservations:: + + ceph daemon osd.<id> dump_scrub_reservations + |