It's 10pm: Do You Know Where Your Writes Are?
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The document discusses handling network errors during MongoDB operations using logical sessions to manage client states. It highlights the introduction of retryable writes and zombie cursor clean-up processes to improve resilience in sharded cluster environments. The main focus is on how logical sessions enable better handling of operations and cursor states across network interruptions.
It's 10pm: Do You Know Where Your Writes Are?
- 4. > db.coll.updateOne( {'_id ' : 12 }, {'$inc' : {'counter': 1 }} );
- 5. > RUNNING OP... > Oh No! > Network Error.
- 6. > Retry op? > Type yes/no:
- 7. No way to retrieve op state
- 8. lack of system-wide resilience
- 9. 1. RetrYable writes 2. zombie cursor cleanup 3. cluster-wide kilLop
- 11. > Retry op? > Type yes/no:
- 12. NO WAY TO RETRIEVE OP STATE. WHY?
- 13. mongoD client state tied to this connection object state is gone. o
- 15. mongoD client 14 14 o state tied to this session object state is still there!
- 16. > var session = startSession( { retry_writes : True } ); > session.db.coll.updateOne( {'_id ‘: 12 }, {'$inc': {'counter': 1 }} );
- 17. > RUNNING OP... > Oh No! > Network Error.
- 18. > Reconnected! > donT WORRY > IVE GOT THIS > ItS 10PM > go watch tv or something
- 23. 1UP
- 25. WANT TO FIND LOTS OF DOCUMENTS ...AND DO LENGTHY PROCESSING ON THEM
- 26. // turn off cursor timeout > var cursor = coll.find( no_cursor_timeout = True );
- 27. > GOT RESULTS! > LENGTHY PROCESSING... > Oh No! > Network Error
- 28. > NETWORK ERROR > NETWORK ERROR > NETWORK ERROR > NETWORK ERROR > NETWORK ERROR > NETWORK ERROR > NETWORK ERROR> TERMINATING.
- 29. > db.serverStatus(); > {"cursors" : {“open" : {"noTimeout" : 1 } } }
- 30. NO WAY TO KILL ABANDONED CURSORS. WHY?
- 31. client mongoD1212 1212 ok, see you later then please keep my cursor alive forever
- 32. ...WE DON’T KNOW IT’S ABANDONED
- 34. client mongoD1212 cursors run inside of sessions 14 14
- 35. HOW IS THIS DIFFERENT?
- 36. client mongoD 14 14 please keep my session alive forever ...no.
- 38. client mongoD1212 cursors run inside of sessions 14 14 70 45
- 39. > NETWORK ERROR > NETWORK ERROR > NETWORK ERROR > NETWORK ERROR > NETWORK ERROR > NETWORK ERROR > NETWORK ERROR> TERMINATING.
- 41. 1UP
- 43. // Run an op that takes FOREVER > var cursor = coll.find( someQueryThatRunsTableScansOnAllShards );
- 45. DANGER
- 46. // Find our operation's id > db.currentOp(); { "desc" : "conn", "threadId" : "139722470946560", "connectionId" : 41, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "c1a:596612", "secs_running" : 0, "microsecs_running" : NumberLong(25), "op" : "command", "ns" : "admin.$cmd", "command" : { "currentOp" : 1, "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, "desc" : "conn", "threadId" : "398934083", "connectionId" : 40, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "c1a:596600", "secs_running" : 0, "microsecs_running" : NumberLong(5), "op" : "command", "ns" : "admin.$cmd", "command" : { "currentOp" : 1, "$logicalTime" : { "clusterTime" : Timestamp(1496862091, 101), "signature" : { "hash" : BinData(0,"znBnOQbapwrefOTE+9345875="), "keyId" : NumberLong("00001232239834388037") } }, "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "desc" : "conn", "threadId" : "398934083", "connectionId" : 40, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, "threadId" : "139722470946560", "connectionId" : 41, "client_s" : “127.0.0.1:49704", "$db" : "admin" }, "numYields" : 0, "locks" : { } }, { "desc" : "conn", "threadId" : "398934083", "connectionId" : 40, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "12345", "secs_running" : 0, "microsecs_running" : NumberLong(5), "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, "threadId" : "139722470946560", "connectionId" : 41, "client_s" : “127.0.0.1:49704", "$db" : "admin" }, "numYields" : 0, "locks" : { } }, { "desc" : "conn", "threadId" : "398934083", "connectionId" : 40, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "12345", "secs_running" : 0, "microsecs_running" : NumberLong(5), "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "threadId" : "398934083", "connectionId" : 40, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "active" : true, "opid" : "c1a:596612", "secs_running" : 0, "microsecs_running" : NumberLong(25), "op" : "command", "ns" : "admin.$cmd", "command" : { "currentOp" : 1, "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, { "desc" : "conn", "threadId" : "139722470946560", "connectionId" : 41, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } },
- 47. // Kill it!!!! > db.killOp( 123456 );
- 48. On a sharded cluster, Queries Fan out
- 50. { "desc" : "conn", "threadId" : "139722470946560", "connectionId" : 41, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "c1a:596612", "secs_running" : 0, "microsecs_running" : NumberLong(25), "op" : "command", "ns" : "admin.$cmd", "command" : { "currentOp" : 1, "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, }, "active" : true, "opid" : "c1a:596600", "secs_running" : 0, "microsecs_running" : NumberLong(5), "op" : "command", "ns" : "admin.$cmd", "command" : { "currentOp" : 1, "$logicalTime" : { "clusterTime" : Timestamp(1496862091, 101), "signature" : { "hash" : BinData(0,"znBnOQbapwrefOTE+9345875="), "keyId" : NumberLong("00001232239834388037") } }, "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "desc" : "conn", "threadId" : "398934083", "connectionId" : 40, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, "threadId" : "139722470946560", "connectionId" : 41, "client_s" : “127.0.0.1:49704", "$db" : "admin" }, "numYields" : 0, "locks" : { } }, { "desc" : "conn", "threadId" : "398934083", "connectionId" : 40, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "12345", "secs_running" : 0, "microsecs_running" : NumberLong(5), "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, { "desc" : "conn", "threadId" : "139722470946560", "connectionId" : 41, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "c1a:596612", "secs_running" : 0, "microsecs_running" : NumberLong(25), "op" : "command", "ns" : "admin.$cmd", "command" : { "currentOp" : 1, "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, }, "active" : true, "opid" : "c1a:596600", "secs_running" : 0, "microsecs_running" : NumberLong(5), "op" : "command", "ns" : "admin.$cmd", "command" : { "currentOp" : 1, "$logicalTime" : { "clusterTime" : Timestamp(1496862091, 101), "signature" : { "hash" : BinData(0,"znBnOQbapwrefOTE+9345875="), "keyId" : NumberLong("00001232239834388037") } }, "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "desc" : "conn", "threadId" : "398934083", "connectionId" : 40, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, "threadId" : "139722470946560", "connectionId" : 41, "client_s" : “127.0.0.1:49704", "$db" : "admin" }, "numYields" : 0, "locks" : { } }, { "desc" : "conn", "threadId" : "398934083", "connectionId" : 40, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "12345", "secs_running" : 0, "microsecs_running" : NumberLong(5), "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, { "desc" : "conn", "threadId" : "139722470946560", "connectionId" : 41, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "c1a:596612", "secs_running" : 0, "microsecs_running" : NumberLong(25), "op" : "command", "ns" : "admin.$cmd", "command" : { "currentOp" : 1, "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, }, "active" : true, "opid" : "c1a:596600", "secs_running" : 0, "microsecs_running" : NumberLong(5), "op" : "command", "ns" : "admin.$cmd", "command" : { "currentOp" : 1, "$logicalTime" : { "clusterTime" : Timestamp(1496862091, 101), "signature" : { "hash" : BinData(0,"znBnOQbapwrefOTE+9345875="), "keyId" : NumberLong("00001232239834388037") } }, "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "desc" : "conn", "threadId" : "398934083", "connectionId" : 40, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, "threadId" : "139722470946560", "connectionId" : 41, "client_s" : “127.0.0.1:49704", "$db" : "admin" }, "numYields" : 0, "locks" : { } }, { "desc" : "conn", "threadId" : "398934083", "connectionId" : 40, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "12345", "secs_running" : 0, "microsecs_running" : NumberLong(5), "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, { "desc" : "conn", "threadId" : "139722470946560", "connectionId" : 41, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "c1a:596612", "secs_running" : 0, "microsecs_running" : NumberLong(25), "op" : "command", "ns" : "admin.$cmd", "command" : { "currentOp" : 1, "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, }, "active" : true, "opid" : "c1a:596600", "secs_running" : 0, "microsecs_running" : NumberLong(5), "op" : "command", "ns" : "admin.$cmd", "command" : { "currentOp" : 1, "$logicalTime" : { "clusterTime" : Timestamp(1496862091, 101), "signature" : { "hash" : BinData(0,"znBnOQbapwrefOTE+9345875="), "keyId" : NumberLong("00001232239834388037") } }, "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "desc" : "conn", "threadId" : "398934083", "connectionId" : 40, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, "threadId" : "139722470946560", "connectionId" : 41, "client_s" : “127.0.0.1:49704", "$db" : "admin" }, "numYields" : 0, "locks" : { } }, { "desc" : "conn", "threadId" : "398934083", "connectionId" : 40, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "12345", "secs_running" : 0, "microsecs_running" : NumberLong(5), "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, { "desc" : "conn", "threadId" : "139722470946560", "connectionId" : 41, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "c1a:596612", "secs_running" : 0, "microsecs_running" : NumberLong(25), "op" : "command", "ns" : "admin.$cmd", "command" : { "currentOp" : 1, "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, 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"driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "c1a:596612", "secs_running" : 0, "microsecs_running" : NumberLong(25), "op" : "command", "ns" : "admin.$cmd", "command" : { "currentOp" : 1, "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, }, "active" : true, "opid" : "c1a:596600", "secs_running" : 0, "microsecs_running" : NumberLong(5), "op" : "command", "ns" : "admin.$cmd", "command" : { "currentOp" : 1, "$logicalTime" : { "clusterTime" : Timestamp(1496862091, 101), "signature" : { "hash" : BinData(0,"znBnOQbapwrefOTE+9345875="), "keyId" : NumberLong("00001232239834388037") } }, "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "desc" : "conn", "threadId" : "398934083", "connectionId" : 40, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, "threadId" : "139722470946560", "connectionId" : 41, "client_s" : “127.0.0.1:49704", "$db" : "admin" }, "numYields" : 0, "locks" : { } }, { "desc" : "conn", "threadId" : "398934083", "connectionId" : 40, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "12345", "secs_running" : 0, "microsecs_running" : NumberLong(5), "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, { "desc" : "conn", "threadId" : "139722470946560", "connectionId" : 41, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "c1a:596612", "secs_running" : 0, "microsecs_running" : NumberLong(25), "op" : "command", "ns" : "admin.$cmd", "command" : { "currentOp" : 1, "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, }, "active" : true, "opid" : "c1a:596600", "secs_running" : 0, "microsecs_running" : NumberLong(5), "op" : "command", "ns" : "admin.$cmd", "command" : { "currentOp" : 1, "$logicalTime" : { "clusterTime" : Timestamp(1496862091, 101), "signature" : { "hash" : BinData(0,"znBnOQbapwrefOTE+9345875="), "keyId" : NumberLong("00001232239834388037") } }, "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "desc" : "conn", "threadId" : "398934083", "connectionId" : 40, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, "threadId" : "139722470946560", "connectionId" : 41, "client_s" : “127.0.0.1:49704", "$db" : "admin" }, "numYields" : 0, "locks" : { } }, { "desc" : "conn", "threadId" : "398934083", "connectionId" : 40, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "12345", "secs_running" : 0, "microsecs_running" : NumberLong(5), "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, { "desc" : "conn", "threadId" : "139722470946560", "connectionId" : 41, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { }, "active" : true, "opid" : "c1a:596600", "secs_running" : 0, "microsecs_running" : NumberLong(5), "op" : "command", "ns" : "admin.$cmd", "command" : { "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, "threadId" : "139722470946560", "connectionId" : 41, "client_s" : “127.0.0.1:49704", "$db" : "admin" }, { "desc" : "conn", "threadId" : "139722470946560", "connectionId" : 41, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { }, "active" : true, "opid" : "c1a:596600", "secs_running" : 0, "microsecs_running" : NumberLong(5), "op" : "command", "ns" : "admin.$cmd", "command" : { "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, "threadId" : "139722470946560", "connectionId" : 41, "client_s" : “127.0.0.1:49704", "$db" : "admin" }, { "desc" : "conn", "threadId" : "139722470946560", "connectionId" : 41, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "c1a:596612", "secs_running" : 0, "microsecs_running" : NumberLong(25), "op" : "command", "ns" : "admin.$cmd", "command" : { "currentOp" : 1, "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, "$configServerState" : { "opTime" : { "ts" : Timestamp(1496862002, 1041), "t" : NumberLong(1) } }, "threadId" : "139722470946560", "connectionId" : 41, "client_s" : “127.0.0.1:49704", "$db" : "admin" }, "numYields" : 0, "locks" : { } }, { "desc" : "conn", "threadId" : "398934083", "connectionId" : 40, "client_s" : "127.0.0.1:49704", "appName" : "MongoDB Shell", "clientMetadata" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3.5.5-518-gb5147cd" }, "os" : { "type" : "Linux", "name" : "Ubuntu", "architecture" : "x86_64", "version" : "16.04" } }, "active" : true, "opid" : "12345", "secs_running" : 0, "microsecs_running" : NumberLong(5), "$client" : { "application" : { "name" : "MongoDB Shell" }, "driver" : { "name" : "MongoDB Internal Client", "version" : "3. m U N m M DB S M m M DB S m M DB C m U m N m mm m m mm O m M DB S m M DB C m U S S T m T m m N m S S T m T m m N m m mY N m M DB S M m M DB S m M DB C m U m N m m M DB S m M DB C m U N m M DB S M S S T m T m m N m N m M DB S M m M DB S m M DB C m U m N m mm m m mm O m M DB S m M DB C m U S S T m T m m N m N m M DB S M m M DB S m M DB C m U m N m mm m m mm O m M DB S m M DB C m U S S T m T m m N m N m M DB S M m M DB S m M DB C m U m N m mm m m mm O m M DB S m M DB C N m M DB S M m M DB S m M DB C m U m N m mm m m mm O m M DB S m M DB C m U S S T m T m m N m T m m N m m mY N m M DB S M m M DB S m M DB C m U m N m m M DB S m M DB C m U N m M DB S M m M DB S m M DB C m U m N m mm m m mm O m M DB S m M DB C m U S S T m T m m N m N m M DB S M m M DB S m M DB C m U m N m mm m m mm O m M DB S m M DB C m U S S T m N m M DB S M m M DB S m M DB C m U m N m mm m m mm O m M DB S m M DB C m U S S T m T m m N m N m M DB S M m M DB S m M DB C m U m N m mm m m mm O m M DB S m M DB C m U S S T m T m m N m N m M DB S M m M DB S m M DB C m U m N m mm m m mm O m M DB S m M DB C m U S S T m m M DB C m U m N m mm m m mm O m M DB S m M DB C m U S S T m T m m N m mY N m M DB S M m M DB S m M DB C m U m N m m M DB S m M DB C m U N m M DB S M m M DB S m M DB C m U m N m mm m m mm O m M DB S m M DB C m U S S T m T m m N m N m M DB S M m M DB S m M DB C m U m N m mm m m mm O m M DB S m M DB C m U S S T m T m m N m M DB S M DB S DB C N m m M DB S M DB C U S m m m M DB S M DB S M DB C U N m mm m m O m M DB S M DB C U S m T m m N m M DB S M DB S M DB C S S T m T m m N m m mY N m M DB S M m M DB S m M DB C m U m N m m M DB S m M DB C m U N m M DB S M m M DB S m M DB C m U m N m mm m m mm O m M DB S m M DB C m U S S T m T m m N m N m M DB S M m M DB S m M DB m U m N m mm m m mm O m M DB S m M DB m U S S T m T m m N m N m M DB S M N m M DB S M m M DB S m M DB C m U m N m mm m m mm O m M DB S m M DB C m U S S T m T m m N m N m M DB S M m M DB S m M DB C m U m N m mm m m mm O m M DB S m M DB C m U S S T m T m m N m N m M DB S M m M DB S m M DB C
- 51. LOLWUT
- 52. NO WAY TO KILL DISTRIBUTED OPS.
- 54. // Kill it!!!! > db.killSession( 14 );
- 57. 1UP
- 58. lack of system-wide resilience
- 59. WHY?
- 60. Resilience is the drivers’ domain
- 61. SMALLER SCALE
- 63. 1. RetrYable writes 2. zombie cursor cleanup 3. cluster-wide kilLop
- 64. DO I NEED TO REWRITE MY APPLICATION? NO!
- 66. YES.
- 68. @ SAMWHOCODES
- 69. THE END