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1.ÈçºÎʹÓà SQL CLI ¿Í»§¶Ë

2.ÈçºÎÔÚÁ÷ÉÏÔËÐÐ SQL ²éѯ

3.ÔËÐÐ window aggregate Óë non-window aggregate£¬Àí½âÆäÇø±ð

4.ÈçºÎÓà SQL Ïû·Ñ Kafka Êý¾Ý

5.ÈçºÎÓà SQL ½«½á¹ûдÈë Kafka ºÍ ElasticSearch

±¾Îļٶ¨ÄúÒѾ߱¸»ù´¡µÄ SQL ֪ʶ¡£

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1.Flink SQL Client£ºÓÃÀ´Ìá½»query£¬ÒÔ¼°¿ÉÊÓ»¯½á¹û

2.Flink JobManager ºÍ TaskManager£ºÓÃÀ´ÔËÐÐ Flink SQL ÈÎÎñ¡£

3.Apache Kafka£ºÓÃÀ´Éú³ÉÊäÈëÁ÷ºÍдÈë½á¹ûÁ÷¡£

4.Apache Zookeeper£ºKafka µÄÒÀÀµÏî

5.ElasticSearch£ºÓÃÀ´Ð´Èë½á¹û

ÎÒÃÇÒѾ­ÌṩºÃÁËDocker Compose ÅäÖÃÎļþ£¬¿ÉÒÔÖ±½ÓÏÂÔØ docker-compose.yml Îļþ¡£

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Linux & MacOS

docker-compose up -d

Windows

set COMPOSE_CONVERT_WINDOWS_PATHS=1
docker-compose up -d

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ÔËÐÐ Flink SQL CLI ¿Í»§¶Ë

ÔËÐÐÏÂÃæÃüÁî½øÈë Flink SQL CLI ¡£

docker-compose exec sql-client ./sql-client.sh

docker-compose exec sql-client ./sql-client.sh

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Docker Compose ÖÐÒѾ­Ô¤ÏÈ×¢²áÁËһЩ±íºÍÊý¾Ý£¬¿ÉÒÔÔËÐÐ SHOW TABLES; À´²é¿´¡£±¾ÎÄ»áÓõ½µÄÊý¾ÝÊÇ Rides ±í£¬ÕâÊÇÒ»Õųö×â³µµÄÐгµ¼Ç¼Êý¾ÝÁ÷£¬°üº¬ÁËʱ¼äºÍλÖÃÐÅÏ¢£¬ÔËÐÐ DESCRIBE Rides; ¿ÉÒԲ鿴±í½á¹¹¡£

Flink SQL> DESCRIBE Rides;
root
|-- rideId: Long // ÐÐΪID (°üº¬Á½Ìõ¼Ç¼£¬Ò»ÌõÈëÒ»Ìõ³ö£©
|-- taxiId: Long // ³ö×â³µID
|-- isStart: Boolean // ¿ªÊ¼ or ½áÊø
|-- lon: Float // ¾­¶È
|-- lat: Float // γ¶È
|-- rideTime: TimeIndicatorTypeInfo(rowtime) // ʱ¼ä
|-- psgCnt: Integer // ³Ë¿ÍÊý

Rides ±íµÄÏêϸ¶¨Òå¼û training-config.yaml¡£

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SELECT * FROM Rides WHERE isInNYC(lon, lat);

SQL CLI ±ã»áÌá½»Ò»¸ö SQL ÈÎÎñµ½ Docker ¼¯ÈºÖУ¬´ÓÊý¾ÝÔ´£¨Rides Á÷´æ´¢ÔÚKafkaÖУ©²»¶ÏÀ­È¡Êý¾Ý£¬²¢Í¨¹ý isInNYC ¹ýÂ˳öËùÐèµÄÊý¾Ý¡£SQL CLI Ò²»á½øÈë¿ÉÊÓ»¯Ä£Ê½£¬²¢²»¶ÏË¢ÐÂչʾ¹ýÂ˺óµÄ½á¹û£º

Ò²¿ÉÒÔµ½ http://localhost:8081 ²é¿´ Flink ×÷ÒµµÄÔËÐÐÇé¿ö¡£

ʵÀý2£ºGroup Aggregate

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Òò´Ë£¬ÎÒÃÇ¿ÉÒÔ°´Õճ˿ÍÊýpsgCnt×ö·Ö×飬ʹÓà COUNT(*) ¼ÆËã³öÿ¸ö·Ö×éµÄʼþÊý£¬×¢ÒâÔÚ·Ö×éǰÐèÒªÏȹýÂ˳öisInNYCµÄÊý¾Ý¡£ÔÚ SQL CLI ÖÐÔËÐÐÈçÏ Query£º

SELECT psgCnt, COUNT(*) AS cnt
FROM Rides
WHERE isInNYC(lon, lat)
GROUP BY psgCnt;

SQL CLI µÄ¿ÉÊÓ»¯½á¹ûÈçÏÂËùʾ£¬½á¹ûÿÃë¶¼ÔÚ·¢Éú±ä»¯¡£²»¹ý×î´óµÄ³Ë¿ÍÊý²»»á³¬¹ý 6 ÈË¡£

ʵÀý3£ºWindow Aggregate

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´Ë´¦Ðè񻃾¼°µ½´°¿Ú¼ÆË㣨ÿ5·ÖÖÓ£©£¬ËùÒÔÐèÒªÓõ½ Tumbling Window µÄÓï·¨¡£¡°Ã¿¸öÇø¿é¡± ËùÒÔ»¹Òª°´ÕÕ toAreaId ½øÐзÖ×鼯Ëã¡£¡°½øÈëµÄ³µÁ¾Êý¡± ËùÒÔÔÚ·Ö×éǰÐèÒª¸ù¾Ý isStart ×ֶιýÂ˳ö½øÈëµÄÐгµ¼Ç¼£¬²¢Ê¹Óà COUNT(*) ͳ¼Æ³µÁ¾Êý¡£×îºó»¹ÓÐÒ»¸ö ¡°ÖÁÉÙÓÐ5Á¾³µ×ÓµÄÇø¿é¡± µÄÌõ¼þ£¬ÕâÊÇÒ»¸ö»ùÓÚͳ¼ÆÖµµÄ¹ýÂËÌõ¼þ£¬ËùÒÔ¿ÉÒÔÓà SQL HAVING ×Ó¾äÀ´Íê³É¡£

×îºóµÄ Query ÈçÏÂËùʾ£º

SELECT
toAreaId(lon, lat) AS area,
TUMBLE_END(rideTime, INTERVAL '5' MINUTE) AS window_end,
COUNT(*) AS cnt
FROM Rides
WHERE isInNYC(lon, lat) and isStart
GROUP BY
toAreaId(lon, lat),
TUMBLE(rideTime, INTERVAL '5' MINUTE)
HAVING COUNT(*) >= 5;

ÔÚ SQL CLI ÖÐÔËÐÐºó£¬Æä¿ÉÊÓ»¯½á¹ûÈçÏÂËùʾ£¬Ã¿¸ö area + window_end µÄ½á¹ûÊä³öºó¾Í²»»áÔÙ·¢Éú±ä»¯£¬µ«ÊÇ»áÿ¸ô 5 ·ÖÖÓ»áÊä³öÒ»Åúд°¿ÚµÄ½á¹û¡£ÒòΪ Docker »·¾³ÖеÄsourceÎÒÃÇ×öÁË10±¶µÄ¼ÓËÙ¶ÁÈ¡£¨Ïà¶ÔÓÚԭʼËÙ¶È£©£¬ËùÒÔÑÝʾµÄʱºò£¬´ó¸Åÿ¸ô30Ãë¾Í»áÊä³öÒ»Åúд°¿Ú¡£

Window Aggregate Óë Group Aggregate µÄÇø±ð

´ÓʵÀý2ºÍʵÀý3µÄ½á¹ûÏÔʾÉÏ£¬¿ÉÒÔÌåÑé³öÀ´ Window Aggregate Óë Group Aggregate ÊÇÓÐһЩÃ÷ÏÔµÄÇø±ðµÄ¡£ÆäÖ÷ÒªµÄÇø±ðÊÇ£¬Window Aggregate Êǵ±window½áÊøÊ±²ÅÊä³ö£¬ÆäÊä³öµÄ½á¹ûÊÇ×îÖÕÖµ£¬²»»áÔÙ½øÐÐÐ޸쬯äÊä³öÁ÷ÊÇÒ»¸ö Append Á÷¡£¶ø Group Aggregate ÊÇÿ´¦ÀíÒ»ÌõÊý¾Ý£¬¾ÍÊä³ö×îеĽá¹û£¬Æä½á¹ûÊÇÔÚ²»¶Ï¸üÐµģ¬¾ÍºÃÏñÊý¾Ý¿âÖеÄÊý¾ÝÒ»Ñù£¬ÆäÊä³öÁ÷ÊÇÒ»¸ö Update Á÷¡£

ÁíÍâÒ»¸öÇø±ðÊÇ£¬window ÓÉÓÚÓÐ watermark £¬¿ÉÒÔ¾«È·ÖªµÀÄÄЩ´°¿ÚÒѾ­¹ýÆÚÁË£¬ËùÒÔ¿ÉÒÔ¼°Ê±ÇåÀí¹ýÆÚ״̬£¬±£Ö¤×´Ì¬Î¬³ÖÔÚÎȶ¨µÄ´óС¡£¶ø Group Aggregate ÒòΪ²»ÖªµÀÄÄЩÊý¾ÝÊǹýÆÚµÄ£¬ËùÒÔ״̬»áÎÞÏÞÔö³¤£¬Õâ¶ÔÓÚÉú²ú×÷ÒµÀ´Ëµ²»ÊǺÜÎȶ¨£¬ËùÒÔ½¨Òé¶Ô Group Aggregate µÄ×÷ÒµÅäÉÏ State TTL µÄÅäÖá£

ÀýÈçͳ¼ÆÃ¿¸öµêÆÌÿÌìµÄʵʱPV£¬ÄÇô¾Í¿ÉÒÔ½« TTL ÅäÖÃ³É 24+ Сʱ£¬ÒòΪһÌìǰµÄ״̬һ°ãÀ´Ëµ¾ÍÓò»µ½ÁË¡£

SELECT DATE_FORMAT(ts, 'yyyy-MM-dd'), shop_id, COUNT(*) as pv
FROM T
GROUP BY DATE_FORMAT(ts, 'yyyy-MM-dd'), shop_id

µ±È»£¬Èç¹û TTL ÅäÖõØÌ«Ð¡£¬¿ÉÄÜ»áÇå³ýµôһЩÓÐÓõÄ״̬ºÍÊý¾Ý£¬´Ó¶øµ¼ÖÂÊý¾Ý¾«È·ÐÔµØÎÊÌâ¡£ÕâÒ²ÊÇÓû§ÐèҪȨºâµØÒ»¸ö²ÎÊý¡£

ʵÀý4£º½« Append Á÷дÈë Kafka

ÉÏһС½Ú½éÉÜÁË Window Aggregate ºÍ Group Aggregate µÄÇø±ð£¬ÒÔ¼° Append Á÷ºÍ Update Á÷µÄÇø±ð¡£ÔÚ Flink ÖУ¬Ä¿Ç° Update Á÷Ö»ÄÜдÈëÖ§³Ö¸üеÄÍⲿ´æ´¢£¬Èç MySQL, HBase, ElasticSearch¡£Append Á÷¿ÉÒÔдÈëÈÎÒâµØ´æ´¢£¬²»¹ýÒ»°ãдÈëÈÕÖ¾ÀàÐ͵Äϵͳ£¬Èç Kafka¡£

ÕâÀïÎÒÃÇÏ£Íû½«¡°Ã¿10·ÖÖӵĴî³ËµÄ³Ë¿ÍÊý¡±Ð´ÈëKafka¡£

ÎÒÃÇÒѾ­Ô¤¶¨ÒåÁËÒ»ÕÅ Kafka µÄ½á¹û±í Sink_TenMinPsgCnts£¨training-config.yaml ÖÐÓÐÍêÕûµÄ±í¶¨Ò壩¡£

ÔÚÖ´ÐÐ Query ǰ£¬ÎÒÃÇÏÈÔËÐÐÈçÏÂÃüÁÀ´¼à¿ØÐ´Èëµ½ TenMinPsgCnts topic ÖеÄÊý¾Ý£º

docker-compose exec sql-client /opt/kafka-client/bin/kafka-console-consumer.sh --bootstrap-server kafka:9092 --topic TenMinPsgCnts --from-beginning

ÿ10·ÖÖӵĴî³ËµÄ³Ë¿ÍÊý¿ÉÒÔʹÓà Tumbling Window À´ÃèÊö£¬ÎÒÃÇʹÓà INSERT INTO Sink_TenMinPsgCnts À´Ö±½Ó½« Query ½á¹ûдÈëµ½½á¹û±í¡£

INSERT INTO Sink_TenMinPsgCnts
SELECT
TUMBLE_START(rideTime, INTERVAL '10' MINUTE) AS cntStart,
TUMBLE_END(rideTime, INTERVAL '10' MINUTE) AS cntEnd,
CAST(SUM(psgCnt) AS BIGINT) AS cnt
FROM Rides
GROUP BY TUMBLE(rideTime, INTERVAL '10' MINUTE);

ÎÒÃÇ¿ÉÒÔ¼à¿Øµ½ TenMinPsgCnts topic µÄÊý¾ÝÒÔ JSON µÄÐÎʽдÈëµ½ÁË Kafka ÖУº

ʵÀý5£º½« Update Á÷дÈë ElasticSearch

×îºóÎÒÃÇʵ¼ùһϽ«Ò»¸ö³ÖÐø¸üÐ嵀 Update Á÷дÈë ElasticSearch ÖС£ÎÒÃÇÏ£Íû½«¡°Ã¿¸öÇøÓò³ö·¢µÄÐгµÊý¡±£¬Ð´Èëµ½ ES ÖС£

ÎÒÃÇÒ²ÒѾ­Ô¤¶¨ÒåºÃÁËÒ»ÕÅ Sink_AreaCnts µÄ ElasticSearch ½á¹û±í£¨training-config.yaml ÖÐÓÐÍêÕûµÄ±í¶¨Ò壩¡£¸Ã±íÖÐÖ»ÓÐÁ½¸ö×Ö¶Î areaId ºÍ cnt¡£

ͬÑùµÄ£¬ÎÒÃÇҲʹÓà INSERT INTO ½« Query ½á¹ûÖ±½ÓдÈëµ½ Sink_AreaCnts ±íÖС£

INSERT INTO Sink_AreaCnts
SELECT toAreaId(lon, lat) AS areaId, COUNT(*) AS cnt
FROM Rides
WHERE isStart
GROUP BY toAreaId(lon, lat);

ÔÚ SQL CLI ÖÐÖ´ÐÐÉÏÊö Query ºó£¬Elasticsearch »á×Ô¶¯µØ´´½¨ area-cnts Ë÷Òý¡£Elasticsearch ÌṩÁËÒ»¸ö REST API ¡£ÎÒÃÇ¿ÉÒÔ·ÃÎÊ

²é¿´area-cntsË÷ÒýµÄÏêϸÐÅÏ¢£º http://localhost:9200/area-cnts

²é¿´area-cntsË÷ÒýµÄͳ¼ÆÐÅÏ¢£º http://localhost:9200/area-cnts/_stats

·µ»Øarea-cntsË÷ÒýµÄÄÚÈÝ£ºhttp://localhost:9200/area-cnts/_search

ÏÔʾ Çø¿é 49791 µÄÐгµÊý£ºhttp://localhost:9200/area-cnts/_search?q=areaId:49791

Ëæ×Å Query µÄÒ»Ö±ÔËÐУ¬ÄãÒ²¿ÉÒԹ۲쵽һЩͳ¼ÆÖµ£¨_all.primaries.docs.count, _all.primaries.docs.deleted£©ÔÚ²»¶ÏµÄÔö³¤£ºhttp://localhost:9200/area-cnts/_stats

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