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Ceph admin socket

The online parameters of ceph can be obtained by using ceph admin socket, which is very helpful for verification and debugging.

$ceph--admin-daemon / path/to/your/ceph/socket [root@osd2 ~] # ceph--admin-daemon / var/run/ceph/ceph-osd.4.asok help {"config diff": "dump diff of current config and default config", "config get": "config get: get the config value", "config set": "config set [...]: set a config variable", "config show": "dump current config settings" "dump_blacklist": "dump blacklisted clients and times", "dump_historic_ops": "show slowest recent ops", "dump_op_pq_state": "dump op priority queue state", "dump_ops_in_flight": "show the ops currently in flight", "dump_reservations": "show recovery reservations", "dump_watchers": "show clients which have active watches, and on which objects", "flush_journal": "flush the journal to permanent store" "get_command_descriptions": "list available commands", "getomap": "output entire object map", "git_version": "get git sha1", "help": "list available commands", "injectdataerr": "injectdata error into omap", "injectmdataerr": "inject metadata error", "log dump": "dump recent log entries to log file", "log flush": "flush log entries to log file", "log reopen": "reopen log file" "objecter_requests": "show in-progress osd requests", "perf dump": "dump perfcounters value", "perf schema": "dump perfcounters schema", "rmomapkey": "remove omapkey", "setomapheader": "setomapheader", "setomapval": "setomap key", "status": "high-level status of OSD", "truncobj": "truncate object to length", "version": "get ceph version"}

Get the parameter settings related to journal:

[root@osd2 ~] # ceph--admin-daemon / var/run/ceph/ceph-mon.osd2.asok config show | grep journal "debug_journaler": "0\ / 5", "debug_journal": "1\ / 3", "journaler_allow_split_entries": "true", "journaler_write_head_interval": "15", "journaler_prefetch_periods": "10", "journaler_prezero_periods": "5" "journaler_batch_interval": "0.001", "journaler_batch_max": "0", "mds_kill_journal_at": "0", "mds_kill_journal_expire_at": "0", "mds_kill_journal_replay_at": "0", "mds_journal_format": "1", "osd_journal": "\ / var\ / lib\ / ceph\ / osd / ceph-osd2\ / journal" Osd_journal_size: "5120", "filestore_fsync_flushes_journal_data": "false", "filestore_journal_parallel": "false", "filestore_journal_writeahead": "false", "filestore_journal_trailing": "false", "journal_dio": "true", "journal_aio": "true", "journal_force_aio": "false", "journal_max_corrupt_search": "10485760" "journal_block_align": "true", "journal_write_header_frequency": "0", "journal_max_write_bytes": "10485760", "journal_max_write_entries": "10485760", "journal_queue_max_ops": "33554432", "journal_queue_max_bytes": "33554432", "journal_align_min_size": "65536", "journal_replay_from": "0" "journal_zero_on_create": "false", "journal_ignore_corruption": "false", thanks for reading! This is the end of the article on "how to use ceph admin socket". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it for more people to see!

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