diff options
Diffstat (limited to 'src/ceph/doc/dev/osd_internals/pg.rst')
| -rw-r--r-- | src/ceph/doc/dev/osd_internals/pg.rst | 31 |
1 files changed, 0 insertions, 31 deletions
diff --git a/src/ceph/doc/dev/osd_internals/pg.rst b/src/ceph/doc/dev/osd_internals/pg.rst deleted file mode 100644 index 4055363..0000000 --- a/src/ceph/doc/dev/osd_internals/pg.rst +++ /dev/null @@ -1,31 +0,0 @@ -==== -PG -==== - -Concepts --------- - -*Peering Interval* - See PG::start_peering_interval. - See PG::acting_up_affected - See PG::RecoveryState::Reset - - A peering interval is a maximal set of contiguous map epochs in which the - up and acting sets did not change. PG::RecoveryMachine represents a - transition from one interval to another as passing through - RecoveryState::Reset. On PG::RecoveryState::AdvMap PG::acting_up_affected can - cause the pg to transition to Reset. - - -Peering Details and Gotchas ---------------------------- -For an overview of peering, see `Peering <../../peering>`_. - - * PG::flushed defaults to false and is set to false in - PG::start_peering_interval. Upon transitioning to PG::RecoveryState::Started - we send a transaction through the pg op sequencer which, upon complete, - sends a FlushedEvt which sets flushed to true. The primary cannot go - active until this happens (See PG::RecoveryState::WaitFlushedPeering). - Replicas can go active but cannot serve ops (writes or reads). - This is necessary because we cannot read our ondisk state until unstable - transactions from the previous interval have cleared. |