What collections are included in RecoveryQueue

This article mainly introduces which collections are included in RecoveryQueue. It is very detailed and has a certain reference value. Friends who are interested must read it!

RecoveryQueue contains three collections: file_recover_queue (saving CInode collections for recover operations), file_recover_queue_front (saving CInode collections for recover operations), and file_recovering (saving CInode collections for ongoing recover operations). A Filter class that is used to perform the actual recover operation.

RecoveryQueue::prioritize ()

| | _ _ the CInode of the recover to be performed is already in the file_recovering collection |

| | _ _ return directly |

| | _ _ the CInode of the recover to be performed is already in the file_recover_queue collection |

| | _ _ insert CInode into the file_recover_queue_front collection |

RecoveryQueue::enqueue ()

| | _ _ insert CInode to be recover into the file_recover_queue collection |

RecoveryQueue::advance ()

| | _ _ check whether the size of the file_recovering collection is drizzle mds_max_file_recover |

| | _ _ get the CInode to be recover from the file_recover_queue_front collection |

| | _ RecoveryQueue::_start () |

| | _ _ get the CInode to be recover from the file_recover_queue collection |

| | _ RecoveryQueue::_start () |

RecoveryQueue::_start ()

| | _ _ get projected inode information from CInode |

| | _ _ insert CInode into the file_recovering collection |

| | _ _ create a C_MDC_Recover class object, which executes the RecoveryQueue::_recovered () callback function in the finish () function |

| | _ _ Filter::probe () calls the probe () function of Filter to perform the actual Recovery operation and calls the C_MDC_Recover::finish () function after the execution is completed |

RecoveryQueue::_recovered ()

| | _ _ delete the recovered CInode from the file_recovering collection |

| | _ CInode::state_clear (STATE_RECOVERING) |

| | _ _ RecoveryQueue::advance () finds the CInode of the next recovery to be executed |

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