{"id":14249,"date":"2023-04-04T13:27:26","date_gmt":"2023-04-04T20:27:26","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/?p=14249"},"modified":"2025-06-13T23:00:08","modified_gmt":"2025-06-14T06:00:08","slug":"updating-sensor-data-exploring-couchbases-multi-model-options","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/ko\/updating-sensor-data-exploring-couchbases-multi-model-options\/","title":{"rendered":"\uc13c\uc11c \ub370\uc774\ud130 \uc5c5\ub370\uc774\ud2b8\ud558\uae30: Couchbase\uc758 \ub2e4\uc911 \ubaa8\ub378 \uc635\uc158 \uc0b4\ud3b4\ubcf4\uae30"},"content":{"rendered":"

\uce74\uc6b0\uce58\ubca0\uc774\uc2a4\ub294 \ub2e4\uc74c\uacfc \uac19\uc740 \uc6a9\ub3c4\ub85c \ub110\ub9ac \uc0ac\uc6a9\ub418\uace0 \uc788\uc2b5\ub2c8\ub2e4. <\/span>IoT \uc0ac\uc6a9 \uc0ac\ub840<\/span><\/a>\uc720\uc5f0\ud55c <\/span>\ub2e4\uc911 \ubaa8\ub378<\/span><\/a> \ub370\uc774\ud130 \uad00\ub9ac \uae30\ub2a5.<\/span><\/p>\n

\ucd5c\uadfc \uc800\ub294 \ud06c\ub8e8\uc988 \uc5c5\uacc4\uc758 \ud55c \uace0\uac1d\uacfc \ud568\uaed8 \uc77c\ud558\uace0 \uc788\uc5c8\ub294\ub370, \uc774 \uace0\uac1d\uc740 \uc120\ubc15\uc758 \uc218\uce58\ub97c \uae30\ub85d\ud558\ub294 \uc5ec\ub7ec \uc13c\uc11c\ub85c\ubd80\ud130 \uc790\uc8fc \uc5c5\ub370\uc774\ud2b8\ub97c \uc218\uc2e0\ud558\uace0 \uc800\uc7a5\ud558\uae30 \uc704\ud574 Couchbase\uac00 \ud544\uc694\ud588\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \ud310\ub3c5\uac12\uc774 \uc2dc\uac04 \uc21c\uc11c\uac00 \uc544\ub2cc \ub2e4\ub978 \uc21c\uc11c\ub85c \uce74\uc6b0\uce58\ubca0\uc774\uc2a4\uc5d0 \uc804\uc1a1\ub420 \uac00\ub2a5\uc131\uc774 \uc788\uc5c8\uc2b5\ub2c8\ub2e4. \uc0c8\ub85c\uc6b4 \uc13c\uc11c \uc218\uce58\uac00 \uc774\uc804 \uc218\uce58\ubcf4\ub2e4 \ud0c0\uc784\uc2a4\ud0ec\ud504\uac00 \ub2a6\uc740 \uacbd\uc6b0\uc5d0\ub9cc \uc800\uc7a5\ub420 \uc218 \uc788\ub3c4\ub85d \ud558\ub824\uba74 \uc5b4\ub5bb\uac8c \ud574\uc57c \ud560\uae4c\uc694?<\/span><\/p>\n

\uac01 \uc13c\uc11c\uc5d0\ub294 \ucd5c\uc2e0 \uc13c\uc11c \ud310\ub3c5\uac12\uc5d0 \ud574\ub2f9\ud558\ub294 \uace0\uc720 \ud0a4\uac00 \uc788\uc2b5\ub2c8\ub2e4. \uc624\uc804 10:43:00\uc758 \ud310\ub3c5\uac12\uc740 \uc624\uc804 10:42:30\uc758 \ud310\ub3c5\uac12\uc744 \ub36e\uc5b4\uc4f8 \uc218 \uc5c6\uc73c\uba70, \ud6c4\uc790\uac00 \ub098\uc911\uc5d0 \uc218\uc2e0\ub418\uc5c8\ub354\ub77c\ub3c4 \ub36e\uc5b4\uc4f8 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c\uc740 \uba87 \uac00\uc9c0 \uc0d8\ud50c \ud310\ub3c5\uac12\uacfc \uadf8 \ucc98\ub9ac \uc21c\uc11c\uc785\ub2c8\ub2e4(\ud0c0\uc784\uc2a4\ud0ec\ud504\uac00 \ubc18\ub4dc\uc2dc \uc2dc\uac04 \uc21c\uc11c\uac00 \uc544\ub2cc \uc810\uc5d0 \uc720\uc758\ud558\uc138\uc694):<\/span><\/p>\n

id: \"C-DI_Nautical_Speed\"\r\n{\r\n\u00a0 \u00a0 \"speed\": 15,\r\n\u00a0 \u00a0 \"unit\": \"knots\",\r\n\u00a0 \u00a0 \"timeStamp\": \"2023-03-10 10:43:00 AM\"\r\n}\r\n\r\nid: \"C-DI_Nautical_Speed\"\r\n{\r\n\u00a0 \u00a0 \"speed\": 15.1,\r\n\u00a0 \u00a0 \"unit\": \"knots\",\r\n\u00a0 \u00a0 \"timeStamp\": \"2023-03-10 11:43:00 AM\"\r\n},\r\n\r\nid: \"C-DI_Nautical_Speed\"\r\n{\r\n\u00a0 \u00a0 \"speed\": 14.9,\r\n\u00a0 \u00a0 \"unit\": \"knots\",\r\n\u00a0 \u00a0 \"timeStamp\": \"2023-03-10 10:42:30 AM\"\r\n}<\/pre>\n
\uc774 \ube14\ub85c\uadf8 \uac8c\uc2dc\ubb3c\uc5d0\uc11c\ub294 Couchbase\uc758 \ub2e4\uc911 \ubaa8\ub378 \uc635\uc158\uc774 \uc774\ub7ec\ud55c \uc2dc\ub098\ub9ac\uc624\ub97c \ud574\uacb0\ud558\uace0 \uc13c\uc11c \ub370\uc774\ud130 \uc5c5\ub370\uc774\ud2b8\ub97c \ud6a8\uc728\uc801\uc73c\ub85c \uad00\ub9ac\ud558\ub294 \ub370 \uc5b4\ub5bb\uac8c \ub3c4\uc6c0\uc774 \ub418\ub294\uc9c0 \uc0b4\ud3b4\ubd05\ub2c8\ub2e4.<\/span><\/p>\n
\uba40\ud2f0 \ubaa8\ub378\uc774\ub780 \ubb34\uc5c7\uc778\uac00\uc694?<\/h2>\n
\uba54\ubaa8\ub9ac \uc6b0\uc120 \uce90\uc2f1\uacfc JSON \ub370\uc774\ud130 \uc9c0\uc18d\uc131\uc744 \uacb0\ud569\ud558\uc5ec \ub370\uc774\ud130 \uad00\ub9ac\uc5d0 \ub300\ud55c \uc720\uc5f0\ud55c \uc811\uadfc \ubc29\uc2dd\uc744 \uc81c\uacf5\ud558\ub294 Couchbase\ub294 \ucd5c\ucd08\uc758 \ub2e4\uc911 \ubaa8\ub378 \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub77c\uace0 \ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. Couchbase\ub294 \ub3d9\uc77c\ud55c \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc778\uc2a4\ud134\uc2a4\uc5d0\uc11c \uc815\ud615, \ubc18\uc815\ud615, \ube44\uc815\ud615 \ub370\uc774\ud130\uc640 \uac19\uc740 \uc5ec\ub7ec \ub370\uc774\ud130 \uc720\ud615\uc744 \ucc98\ub9ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
\uc2dc\uac04\uc774 \uc9c0\ub0a8\uc5d0 \ub530\ub77c \uce74\uc6b0\uce58\ubca0\uc774\uc2a4\ub294 \ub2e4\uc74c\uacfc \uac19\uc740 \uae30\ub2a5\uc744 \ucd94\uac00\ud588\uc2b5\ub2c8\ub2e4. <\/span>SQL++<\/span><\/a>, <\/span>\uc804\uccb4 \ud14d\uc2a4\ud2b8 \uac80\uc0c9(FTS)<\/span><\/a>, <\/span>\uc774\ubca4\ud2b8<\/span><\/a>, <\/span>\ubd84\uc11d<\/span><\/a> \ub3c4\uad6c: \ub3d9\uc77c\ud55c \ub370\uc774\ud130 \ud480\uc5d0 \uc561\uc138\uc2a4\ud558\uace0, \uc0c9\uc778\ud558\uace0, \uc0c1\ud638 \uc791\uc6a9\ud558\uae30 \uc704\ud55c \uc5ec\ub7ec \ubaa8\ub378. \uc774\ub7ec\ud55c \ub2e4\uc911 \ubaa8\ub378 \uc811\uadfc \ubc29\uc2dd\uc740 Couchbase\ub97c \uae30\uc874 \ub370\uc774\ud130\ubca0\uc774\uc2a4\ubcf4\ub2e4 \ub354 \uc720\uc5f0\ud558\uac8c \ub9cc\ub4e4 \uc218 \uc788\uc9c0\ub9cc, \ub370\uc774\ud130\uc640 \uc0c1\ud638 \uc791\uc6a9\ud558\ub294 \ubc29\ubc95\uc774 \ud55c \uac00\uc9c0\ubfd0\uc778 \ub808\uac70\uc2dc \uc2dc\uc2a4\ud15c\uc5d0 \ube44\ud574 \uc7a5\ub2e8\uc810\uc5d0 \ub300\ud574 \uc870\uae08 \ub354 \uace0\ubbfc\ud574\uc57c \ud560 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
\uc13c\uc11c \ud310\ub3c5\uac12 \uc5c5\ub370\uc774\ud2b8\ub97c \uc704\ud55c \ub2e4\uc911 \ubaa8\ub378 \uc635\uc158<\/h2>\n
Couchbase\uc758 \ub2e4\uc911 \ubaa8\ub378 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc5d0\uc11c \uc774 \uc0ac\uc6a9 \uc0ac\ub840\uc5d0 \ub300\ud55c \uc13c\uc11c \ud310\ub3c5\uac12\uc744 \uc5c5\ub370\uc774\ud2b8\ud560 \ub54c \uace0\ub824\ud574\uc57c \ud560 \uba87 \uac00\uc9c0 \uc811\uadfc \ubc29\uc2dd\uc774 \uc788\uc2b5\ub2c8\ub2e4:<\/span><\/p>\n
    \n
  1. \n
      \n
    1. \ub099\uad00\uc801 \ub610\ub294 \ube44\uad00\uc801 \uc7a0\uae08 \uae30\ub2a5\uc744 \uac16\ucd98 \ud0a4-\uac12 API<\/span><\/li>\n
    2. ACID \ud2b8\ub79c\uc7ad\uc158\uc774 \ud3ec\ud568\ub41c \ud0a4-\uac12 API<\/span><\/li>\n
    3. SQL++ \uc5c5\ub370\uc774\ud2b8 \ubb38<\/span><\/li>\n
    4. \uc628\uc5c5\ub370\uc774\ud2b8 \uae30\ub2a5 \uc774\ubca4\ud2b8<\/span><\/li>\n<\/ol>\n<\/li>\n<\/ol>\n
      \uc774\ub7ec\ud55c \ubaa8\ub4e0 \uc635\uc158\uc5d0\ub294 \uc131\ub2a5, \ubcf5\uc7a1\uc131 \ubc0f \uc694\uad6c \uc0ac\ud56d \uce21\uba74\uc5d0\uc11c \uace0\uc720\ud55c \uc7a5\uc810\uacfc \uc7a5\ub2e8\uc810\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uac00\uc7a5 \uc801\ud569\ud55c \uc811\uadfc \ubc29\uc2dd\uc744 \uc120\ud0dd\ud558\ub294 \uac83\uc740 \uc5c5\ub370\uc774\ud2b8\uc758 \ud06c\uae30\uc640 \ube48\ub3c4, \ub3d9\uc2dc\uc131 \uc218\uc900, \uc804\ubc18\uc801\uc778 \uc131\ub2a5 \uc694\uad6c \uc0ac\ud56d \ub4f1\uc758 \uc694\uc778\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9d1\ub2c8\ub2e4.<\/span><\/p>\n
      \uad81\uadf9\uc801\uc73c\ub85c \uac00\uc7a5 \uc88b\uc740 \uc811\uadfc \ubc29\uc2dd\uc740 \uc2e4\uc81c \ub370\uc774\ud130 \ub610\ub294 \uc2e4\uc81c \ub370\uc774\ud130\uc758 \uadfc\uc0ac\uce58\ub97c \uc0ac\uc6a9\ud55c \uc2e4\uc81c \ud14c\uc2a4\ud2b8\ub97c \ud1b5\ud574\uc11c\ub9cc \uacb0\uc815\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uac1c\ubc1c\uc790\ub294 \uc7a5\ub2e8\uc810\uc744 \uac80\ud1a0\ud558\uace0 \ub2e4\uc591\ud55c \uc635\uc158\uc744 \uc2e4\ud5d8\ud568\uc73c\ub85c\uc368 Couchbase\uc758 \ub2e4\uc911 \ubaa8\ub378 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc5d0\uc11c \uc13c\uc11c \ud310\ub3c5\uac12\uc744 \uc5c5\ub370\uc774\ud2b8\ud558\ub294 \uac00\uc7a5 \ud6a8\uacfc\uc801\uc778 \ubc29\ubc95\uc744 \ud30c\uc545\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
      \uc774\ub7ec\ud55c \uc2dc\ub098\ub9ac\uc624\uc758 \ub300\ubd80\ubd84\uc740 \uc13c\uc11c \ubb38\uc11c\uac00 \uc774\ubbf8 \uc874\uc7ac\ud55c\ub2e4\uace0 \uac00\uc815\ud55c\ub2e4\ub294 \uc810\uc5d0 \uc720\uc758\ud558\uc138\uc694(\uc815\uc0c1 \uc0c1\ud0dc\uc5d0\uc11c\ub294 \uac00\uc7a5 \uc77c\ubc18\uc801\uc778 \uc2dc\ub098\ub9ac\uc624\uc785\ub2c8\ub2e4). \uadf8\ub807\uc9c0 \uc54a\uc740 \uacbd\uc6b0, \uc13c\uc11c \ubb38\uc11c\uac00 \uc874\uc7ac\ud558\uc9c0 \uc54a\ub294\ub2e4\uba74 \ub300\uccb4<\/em> \ub610\ub294 \uc5c5\ub370\uc774\ud2b8<\/em> \uc791\uc5c5\uc73c\ub85c \uc5c5\uc11c\ud2b8<\/em>\u00a0\ub97c \uc0ac\uc6a9\ud558\uc5ec \ubb38\uc11c\uac00 \uc5c6\ub294 \uacbd\uc6b0 \ubb38\uc11c\uac00 \uc0dd\uc131\ub418\uc5c8\ub294\uc9c0 \ud655\uc778\ud569\ub2c8\ub2e4. (\ub610\ub294 \uac01 \uc13c\uc11c\uc5d0 \ub300\ud55c \ubb38\uc11c\ub85c \uceec\ub809\uc158\uc744 '\uc2dc\ub4dc'\ud560 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4).<\/span><\/p>\n
      \uc774\uc81c \uac01 \uac00\ub2a5\uc131\uc744 \uc0b4\ud3b4 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
      \ub099\uad00\uc801 \ub610\ub294 \ube44\uad00\uc801 \uc7a0\uae08 \uae30\ub2a5\uc744 \uac16\ucd98 \ud0a4-\uac12 API<\/h2>\n
      Couchbase\uc758 \ub2e4\uc911 \ubaa8\ub378 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc5d0\uc11c \uc13c\uc11c \ud310\ub3c5\uac12\uc744 \uc5c5\ub370\uc774\ud2b8\ud558\ub294 \ud55c \uac00\uc9c0 \ubc29\ubc95\uc740 \ub099\uad00\uc801 \ub610\ub294 \ube44\uad00\uc801 \uc7a0\uae08\uc744 \uc0ac\uc6a9\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. \uc774 \uc7a0\uae08 \uba54\ucee4\ub2c8\uc998\uc740 Couchbase\uc5d0 \uc624\ub7ab\ub3d9\uc548 \uc874\uc7ac\ud574 \uc654\uc73c\uba70, \ub2e4\uc74c\uacfc \uac19\uc740 \uae30\uc220\uc744 \uc0ac\uc6a9\ud569\ub2c8\ub2e4. <\/span>CAS(\ube44\uad50 \ubc0f \uc2a4\uc651)<\/span><\/a> \ub97c \uc0ac\uc6a9\ud558\uc5ec \uac1c\ubcc4 \ubb38\uc11c\uc758 \uc870\uac74\ubd80 \uc5c5\ub370\uc774\ud2b8\ub97c \ubcf4\uc7a5\ud569\ub2c8\ub2e4.<\/span><\/p>\n
      CAS \uac12\uc740 \ubb38\uc11c\uac00 \ubcc0\uacbd\ub420 \ub54c\ub9c8\ub2e4 \ubcc0\uacbd\ub418\ub294 \uc784\uc758\uc758 \uc22b\uc790\uc785\ub2c8\ub2e4. \uac1c\ubc1c\uc790\ub294 CAS \uac12\uc744 \uc77c\uce58\uc2dc\ud0b4\uc73c\ub85c\uc368 \ucd5c\uc18c\ud55c\uc758 \uc624\ubc84\ud5e4\ub4dc\ub85c \uc13c\uc11c \ub370\uc774\ud130\ub97c \uc870\uac74\ubd80\ub85c \uc5c5\ub370\uc774\ud2b8\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uc139\uc158\uc5d0\uc11c\ub294 \uc774 \uc13c\uc11c \ub370\uc774\ud130 \uc0ac\uc6a9 \uc0ac\ub840\uc5d0 \ub099\uad00\uc801 \uc7a0\uae08\uacfc \ube44\uad00\uc801 \uc7a0\uae08\uc744 \uc5b4\ub5bb\uac8c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub294\uc9c0 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
      \ub099\uad00\uc801 \uc7a0\uae08<\/h3>\n
      \ub099\uad00\uc801 \uc7a0\uae08\uc740 Couchbase\uc5d0\uc11c \uc13c\uc11c \ub370\uc774\ud130\ub97c \uc5c5\ub370\uc774\ud2b8\ud558\ub294 \uac04\ub2e8\ud55c \uc811\uadfc \ubc29\uc2dd\uc73c\ub85c, \ub2e8 \uc138 \ub2e8\uacc4\ub9cc \uac70\uce58\uba74 \ub429\ub2c8\ub2e4:<\/span><\/p>\n
      \uadf8\ub9ac\uace0 <\/span>\uccab \ubc88\uc9f8 \ub2e8\uacc4<\/b> \ub294 \ubb38\uc11c \uac12\uacfc \ud574\ub2f9 \uba54\ud0c0\ub370\uc774\ud130(CAS \uac12 \ud3ec\ud568)\ub97c \ud3ec\ud568\ud558\ub294 \ud0a4\ub85c \ubb38\uc11c\ub97c \uac80\uc0c9\ud558\ub294 \uc791\uc5c5\uc744 \ud3ec\ud568\ud569\ub2c8\ub2e4.<\/span><\/p>\n
      \uac80\uc0c9\uc774 \uc644\ub8cc\ub418\uba74 <\/span>\ub450 \ubc88\uc9f8 \ub2e8\uacc4<\/b> \ub294 \ud0c0\uc784\uc2a4\ud0ec\ud504\uac00 \ub4e4\uc5b4\uc624\ub294 \ud0c0\uc784\uc2a4\ud0ec\ud504\ubcf4\ub2e4 \uc624\ub798\ub41c \uac83\uc778\uc9c0 \ud655\uc778\ud558\ub294 \uac83\uc785\ub2c8\ub2e4.<\/span><\/p>\n
      \uadf8\ub807\ub2e4\uba74 <\/span>\uc138 \ubc88\uc9f8 \ub2e8\uacc4<\/b> \ub294 \ubb38\uc11c\ub97c \uc0c8 \uac12\uc73c\ub85c \ubc14\uafb8\uace0 CAS \uac12\uc744 \ud568\uaed8 \uc81c\ucd9c\ud558\ub294 \uc791\uc5c5\uc744 \ud3ec\ud568\ud569\ub2c8\ub2e4.<\/span><\/p>\n
      \uc5ec\uae30\uc11c \"\ub099\uad00\uc801\uc778\" \ubd80\ubd84\uc774 \ub4f1\uc7a5\ud569\ub2c8\ub2e4. CAS \uac12\uc774 \uc77c\uce58\ud558\uba74 \uc791\uc5c5\uc774 \uc131\uacf5\ud55c \uac83\uc774\uace0 \uc13c\uc11c \ub370\uc774\ud130\uac00 \uc5c5\ub370\uc774\ud2b8\ub429\ub2c8\ub2e4. \uadf8\ub7ec\ub098 CAS \uac12\uc774 \uc77c\uce58\ud558\uc9c0 \uc54a\uc73c\uba74 \ub9c8\uc9c0\ub9c9 \uc77d\uae30 \uc791\uc5c5 \uc774\ud6c4 \uc13c\uc11c \ub370\uc774\ud130\uac00 (\ub2e4\ub978 \uc2a4\ub808\ub4dc\/\ud504\ub85c\uc138\uc2a4\uc5d0 \uc758\ud574) \uc5c5\ub370\uc774\ud2b8\ub418\uc5c8\uc74c\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4. \uc774 \uacbd\uc6b0 \ub2e4\uc74c\uacfc \uac19\uc740 \uc635\uc158\uc774 \uc788\uc2b5\ub2c8\ub2e4. <\/span>\uc791\uc5c5\uc744 \ub2e4\uc2dc \uc2dc\ub3c4\ud569\ub2c8\ub2e4.<\/b> \ub97c \uc124\uc815\ud558\ub294 \uac83\uc774 \uc88b\uc2b5\ub2c8\ub2e4. \ud2b9\uc815 \uc13c\uc11c \ubb38\uc11c\uac00 \uc790\uc8fc \uc5c5\ub370\uc774\ud2b8\ub420 \uac83\uc73c\ub85c \uc608\uc0c1\ud558\uc9c0 \uc54a\ub294\ub2e4\uba74 \ub099\uad00\uc801 \uc7a0\uae08\uc744 \uc0ac\uc6a9\ud558\ub294 \uac83\uc774 \uc88b\uc2b5\ub2c8\ub2e4(\uc7ac\uc2dc\ub3c4\uac00 \ub4dc\ubb3c\uae30 \ub54c\ubb38\uc5d0).<\/span><\/p>\n
      \ub2e4\uc74c\uc740 \uac04\ub2e8\ud55c \uc7ac\uc2dc\ub3c4 \ub85c\uc9c1\uc744 \uc0ac\uc6a9\ud55c \ub099\uad00\uc801 \uc7a0\uae08\uc758 \uc608\uc2dc\uc785\ub2c8\ub2e4:<\/span><\/p>\n
      \/\/ get existing sensor reading\r\nvar currentDoc = await _collection.GetAsync(sensorId);\r\nvar currentDocCas = currentDoc.Cas;\r\nvar currentReading = currentDoc.ContentAs<NauticalSpeed>();\r\n\r\n\/\/ check timestamps\r\nif (newSensorReading.TimeStamp > currentReading.TimeStamp)\r\n{\r\n\u00a0 \u00a0 \/\/ incoming reading is newer, update the record\r\n\u00a0 \u00a0 Console.WriteLine(\"Incoming sensor reading is newer. Updating.\");\r\n\u00a0 \u00a0 var retries = 3;\r\n\u00a0 \u00a0 while (retries > 0)\r\n\u00a0 \u00a0 {\r\n\u00a0 \u00a0 \u00a0 \u00a0 try\r\n\u00a0 \u00a0 \u00a0 \u00a0 {\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 await _collection.ReplaceAsync(sensorId, newSensorReading, options => options.Cas(currentDocCas));\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 return;\r\n\u00a0 \u00a0 \u00a0 \u00a0 }\r\n\u00a0 \u00a0 \u00a0 \u00a0 catch (CasMismatchException)\r\n\u00a0 \u00a0 \u00a0 \u00a0 {\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Console.WriteLine($\"CAS mismatch. Retries remaining: {retries}\");\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 retries--;\r\n\u00a0 \u00a0 \u00a0 \u00a0 }\r\n\u00a0 \u00a0 }\r\n\u00a0 \u00a0 Console.WriteLine(\"Retry max exceeded. Sensor reading was not updated.\");\r\n}\r\nelse\r\n{\r\n\u00a0 \u00a0 Console.WriteLine(\"Incoming sensor reading is not new. Ignoring.\");\r\n\u00a0 \u00a0 \/\/ incoming reading is not newer, so do nothing\r\n\u00a0 \u00a0 \/\/ (or possibly update a log, or whatever else you want to do)\r\n}<\/pre>\n
      \ube44\uad00\uc801 \uc7a0\uae08<\/h3>\n
      \ube44\uad00\uc801 \uc7a0\uae08<\/span><\/a> \ub294 \uac19\uc740 \ubb38\uc81c\uc5d0 \uc811\uadfc\ud558\ub294 \ub610 \ub2e4\ub978 \ubc29\ubc95\uc785\ub2c8\ub2e4. \ub099\uad00\uc801 \uc7a0\uae08\uacfc \ub9c8\ucc2c\uac00\uc9c0\ub85c \uc138 \ub2e8\uacc4\ub85c \uad6c\uc131\ub418\uc9c0\ub9cc \uc57d\uac04\uc758 \ucc28\uc774\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
      \uadf8\ub9ac\uace0 <\/span>\uccab \ubc88\uc9f8 \ub2e8\uacc4<\/b> \ub294 <\/span>\uac00\uc838\uc624\uae30 \ubc0f \uc7a0\uae08<\/span><\/i> \ud0a4\ubcc4\ub85c \ubb38\uc11c\ub97c \uc7a0\uadf8\uace0 CAS \uac12\uc744 \uae30\ub85d\ud569\ub2c8\ub2e4. \ubb38\uc11c\ub97c \ub2e8\uc21c\ud788 \uc77d\ub294 \ub099\uad00\uc801 \uc7a0\uae08\uacfc \ub2ec\ub9ac, \ube44\uad00\uc801 \uc7a0\uae08\uc5d0\uc11c\ub294 \ubb38\uc11c\uac00 \uba85\uc2dc\uc801\uc73c\ub85c \uc7a0\uae41\ub2c8\ub2e4. \uc989, \ubb38\uc11c\uac00 \uc7a0\uae08 \ud574\uc81c\ub420 \ub54c\uae4c\uc9c0 \ub2e4\ub978 \ud504\ub85c\uc138\uc2a4\uac00 \ubb38\uc11c\ub97c \ubcc0\uacbd\ud560 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
      \uc5d0\uc11c <\/span>\ub450 \ubc88\uc9f8 \ub2e8\uacc4<\/b>\ub099\uad00\uc801 \uc7a0\uae08\uacfc \ub9c8\ucc2c\uac00\uc9c0\ub85c \ud0c0\uc784\uc2a4\ud0ec\ud504\uac00 \ub4e4\uc5b4\uc624\ub294 \ud0c0\uc784\uc2a4\ud0ec\ud504\ubcf4\ub2e4 \uc624\ub798\ub418\uc5c8\ub294\uc9c0 \ud655\uc778\ud569\ub2c8\ub2e4.<\/span><\/p>\n
      \uadf8\ub807\ub2e4\uba74 <\/span>\uc138 \ubc88\uc9f8 \ub2e8\uacc4<\/b>\ub97c \uc785\ub825\ud558\uba74 \ubb38\uc11c\uac00 \uc0c8 \uac12\uc73c\ub85c \ub300\uccb4\ub418\uace0 CAS \uac12\uacfc \ud568\uaed8 \uc81c\ucd9c\ub429\ub2c8\ub2e4.<\/span><\/p>\n
      \ube44\uad00\uc801 \uc7a0\uae08\uc758 1\ub2e8\uacc4\uc5d0\uc11c\ub294 \ud0c0\uc784\uc544\uc6c3 \uae30\uac04\ub3c4 \uc9c0\uc815\ud574\uc57c \ud569\ub2c8\ub2e4. \uc65c \uadf8\ub7f4\uae4c\uc694? \uc624\ub958\ub098 \ucda9\ub3cc\ub85c \uc778\ud574 3\ub2e8\uacc4\uac00 \ubc1c\uc0dd\ud558\uc9c0 \uc54a\uc744 \uc218 \uc788\uc73c\uba70, \uacb0\uad6d \ubb38\uc11c\uac00 \uc7a0\uae08 \ud574\uc81c\ub418\uc5b4\uc57c \ud558\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4.<\/span><\/p>\n
      \uc13c\uc11c \ubb38\uc11c\uac00 \ub9ce\uc774 \uc5c5\ub370\uc774\ud2b8\ub420 \uac83\uc73c\ub85c \uc608\uc0c1\ud55c\ub2e4\uba74 \ube44\uad00\uc801\uc73c\ub85c \uc811\uadfc\ud558\ub294 \uac83\uc774 \ub354 \ub098\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ud558\uc9c0\ub9cc \uc7a0\uae08\uc73c\ub85c \uc778\ud574 \ubb38\uc11c\uac00 \uc7a0\uae08 \ud574\uc81c\ub418\uae30\ub97c \uae30\ub2e4\ub9ac\ub294 \ub2e4\ub978 \ud504\ub85c\uc138\uc2a4\uc758 \uc9c0\uc5f0 \uc2dc\uac04\uc774 \ub2e8\ucd95\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
      \ube44\uad00\uc801 \uc7a0\uae08\uc758 \uc608\ub97c \ub4e4\uc5b4 \uc124\uba85\ud558\uc790\uba74 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/span><\/p>\n
      \/\/ get current sensor data\r\nvar maxLockTime = TimeSpan.FromSeconds(30);\r\nvar currentDoc = await _collection.GetAndLockAsync(sensorId, maxLockTime);\r\nvar currentDocCas = currentDoc.Cas;\r\nvar currentReading = currentDoc.ContentAs<NauticalSpeed>();\r\n\r\n\/\/ check timestamps against new reading\r\nif (newSensorReading.TimeStamp > currentReading.TimeStamp)\r\n{\r\n\u00a0 \u00a0 \/\/ incoming reading is newer, update the record\r\n\u00a0 \u00a0 Console.WriteLine(\"Incoming sensor reading is newer. Updating.\");\r\n\u00a0 \u00a0 await _collection.ReplaceAsync(sensorId, newSensorReading, options => options.Cas(currentDocCas));\r\n\u00a0 \u00a0 return;\r\n}\r\nelse\r\n{\r\n\u00a0 \u00a0 await _collection.UnlockAsync(sensorId, currentDocCas);\r\n\u00a0 \u00a0 Console.WriteLine(\"Incoming sensor reading is not new. Ignoring.\");\r\n\u00a0 \u00a0 \/\/ incoming reading is not newer, so do nothing\r\n\u00a0 \u00a0 \/\/ (or possibly update a log, or whatever else you want to do)\r\n}<\/pre>\n
      CAS \uc7a0\uae08 \ud2b8\ub808\uc774\ub4dc \uc624\ud504<\/h3>\n
      CAS \uc7a0\uae08\uacfc \uad00\ub828\ud574\uc11c\ub294 \uace0\ub824\ud574\uc57c \ud560 \uc7a5\ub2e8\uc810\uc774 \uc788\uc2b5\ub2c8\ub2e4. \ub099\uad00\uc801 \uc7a0\uae08\uc740 \ucda9\ub3cc\uc774 \ub4dc\ubb3c \ub54c \uc798 \uc791\ub3d9\ud558\uc9c0\ub9cc \uc7ac\uc2dc\ub3c4 \uac00\ub2a5\uc131\uc744 \ucc98\ub9ac\ud558\uae30 \uc704\ud574 \uc801\uc808\ud55c \uc7ac\uc2dc\ub3c4 \ub85c\uc9c1\uc744 \uad6c\ud604\ud574\uc57c \ud569\ub2c8\ub2e4.<\/span><\/p>\n
      \uc774\ub7ec\ud55c \uc808\ucda9\uc810\uc744 \uc704\ud574 \uace0\uae09 \ub610\ub294 \ud2b9\uc218 \uc7ac\uc2dc\ub3c4\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc774 \uc0ac\uc6a9 \uc0ac\ub840\uc5d0\uc11c\ub294 \uc7ac\uc2dc\ub3c4 \ud69f\uc218\uac00 \ub9ce\uac70\ub098 \ud310\ub3c5\uac12\uc774 \ub9e4\uc6b0 \uc624\ub798\ub41c \uacbd\uc6b0 \uc218\uc2e0 \uc13c\uc11c \ud310\ub3c5\uac12\uc744 '\ud3ec\uae30'\ud558\uace0 \ud3d0\uae30\ud558\ub294 \uac83\uc774 \ud5c8\uc6a9\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
      \ubc18\uba74 \ube44\uad00\uc801 \uc7a0\uae08\uc740 '\ub354 \uc548\uc804\ud55c' \uc811\uadfc \ubc29\uc2dd\uc774\uc9c0\ub9cc \uc7a0\uae08\uc774 \uc131\ub2a5\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5\uc744 \uba85\ud655\ud788 \uc774\ud574\ud574\uc57c \ud569\ub2c8\ub2e4. \uc7a0\uadf8\uba74 \ubb38\uc11c\uac00 \uc7a0\uae08 \ud574\uc81c\ub420 \ub54c\uae4c\uc9c0 \uae30\ub2e4\ub824\uc57c \ud558\ub294 \ub2e4\ub978 \ud504\ub85c\uc138\uc2a4\uc758 \ub300\uae30 \uc2dc\uac04\uc774 \ub298\uc5b4\ub0a0 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
      \uc0b0 \uac70\ub798<\/h2>\n
      \uc13c\uc11c \uc5c5\ub370\uc774\ud2b8 \ubb38\uc81c\uc5d0 \ub300\ud55c \ub610 \ub2e4\ub978 \uc7a0\uc7ac\uc801 \ud574\uacb0\ucc45\uc740 ACID \ud2b8\ub79c\uc7ad\uc158\uc744 \uc0ac\uc6a9\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. \uc774 \uc811\uadfc \ubc29\uc2dd\uc740 \uc774 \uc0ac\uc6a9 \uc0ac\ub840\uc5d0\uc11c \ub2e8\uc77c \ubb38\uc11c\ub97c \uc5c5\ub370\uc774\ud2b8\ud558\ub294 \ub370\ub294 \uacfc\ub3c4\ud560 \uc218 \uc788\uc9c0\ub9cc \uc5ec\ub7ec \ubb38\uc11c\ub97c \uc6d0\uc790 \ub2e8\uc704\ub85c \uc5c5\ub370\uc774\ud2b8\ud574\uc57c \ud558\ub294 \ub2e4\ub978 \uc0ac\uc6a9 \uc0ac\ub840\uc5d0\uc11c\ub294 \uc720\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
      \uc13c\uc11c \ub370\uc774\ud130\uc758 \ubb38\uc81c\uc810\uc740 \ube60\ub978 \uc18d\ub3c4\ub85c \ub4e4\uc5b4\uc62c \uc218 \uc788\ub2e4\ub294 \uac83\uc785\ub2c8\ub2e4. \ud604\uc7ac \ub370\uc774\ud130\ub97c \ud655\uc778\ud558\uace0 \ub4e4\uc5b4\uc624\ub294 \uc13c\uc11c \ub370\uc774\ud130\ub85c \uc5c5\ub370\uc774\ud2b8\ud558\ub294 \uc0ac\uc774\uc5d0 \ub2e4\ub978 \uc218\uce58\uac00 \ub4e4\uc5b4\uc62c \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \ubb38\uc81c\ub97c \ubc29\uc9c0\ud558\uae30 \uc704\ud574 ACID \ud2b8\ub79c\uc7ad\uc158\uc744 \uc0ac\uc6a9\ud558\uc5ec \ub370\uc774\ud130\ub97c \uc870\uac74\ubd80\ub85c \uc5c5\ub370\uc774\ud2b8\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
      \uc544\ub798 \uc0d8\ud50c \ucf54\ub4dc\ub294 ACID \ud2b8\ub79c\uc7ad\uc158\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc13c\uc11c \ubb38\uc11c\ub97c \uc5c5\ub370\uc774\ud2b8\ud558\ub294 \ubc29\ubc95\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4. \uc774 \ud2b8\ub79c\uc7ad\uc158\uc740 \uc13c\uc11c\ub2f9 \ud55c \ubc88\uc5d0 \ud558\ub098\uc758 \uc5c5\ub370\uc774\ud2b8 \uc791\uc5c5\ub9cc \uc218\ud589\ud560 \uc218 \uc788\ub3c4\ub85d \ud558\uc5ec \uc5ec\ub7ec \uac1c\uc758 \uc218\uc2e0 \uc13c\uc11c \ud310\ub3c5\uac12\uc774 \uc11c\ub85c \uac04\uc12d\ud558\ub294 \uac83\uc744 \ubc29\uc9c0\ud569\ub2c8\ub2e4.<\/span><\/p>\n
      var transaction = Transactions.Create(_cluster, TransactionConfigBuilder.Create()\r\n\u00a0 \u00a0 .DurabilityLevel(DurabilityLevel.None)); \/\/ set to 'none' because I'm using a single-node dev cluster\r\n\u00a0 \u00a0 \/\/ for more details see: https:\/\/docs.couchbase.com\/dotnet-sdk\/current\/howtos\/distributed-acid-transactions-from-the-sdk.html\r\n\r\nawait transaction.RunAsync(async (context) =>\r\n{\r\n\u00a0 \u00a0 \/\/ get existing sensor reading\r\n\u00a0 \u00a0 var currentDoc = await context.GetAsync(_collection, sensorId);\r\n\u00a0 \u00a0 var currentReading = currentDoc.ContentAs<NauticalSpeed>();\r\n\r\n\u00a0 \u00a0 \/\/ check timestamps\r\n\u00a0 \u00a0 if (newSensorReading.TimeStamp > currentReading.TimeStamp)\r\n\u00a0 \u00a0 {\r\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ incoming reading is newer, update the record\r\n\u00a0 \u00a0 \u00a0 \u00a0 Console.WriteLine(\"Incoming sensor reading is newer. Updating.\");\r\n\u00a0 \u00a0 \u00a0 \u00a0 await context.ReplaceAsync(currentDoc, newSensorReading);\r\n\u00a0 \u00a0 }\r\n\u00a0 \u00a0 else\r\n\u00a0 \u00a0 {\r\n\u00a0 \u00a0 \u00a0 \u00a0 Console.WriteLine(\"Incoming sensor reading is not new. Ignoring.\");\r\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ incoming reading is not newer, so do nothing\r\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ (or possibly update a log, or whatever else you want to do)\r\n\u00a0 \u00a0 }\r\n});<\/pre>\n
      \uc0b0 \uac70\ub798 \ud2b8\ub808\uc774\ub4dc \uc624\ud504<\/h2>\n
      \uc131\ub2a5\uc744 \uadf9\ub300\ud654\ud558\ub824\uba74 \uac00\ub2a5\ud55c \ud55c \ud0a4-\uac12 API\ub97c \uc0ac\uc6a9\ud574\uc57c \ud569\ub2c8\ub2e4. \uadf8\ub7ec\ub098 Couchbase\uc5d0\uc11c \ubd84\uc0b0 ACID \ud2b8\ub79c\uc7ad\uc158\uc744 \uc0ac\uc6a9\ud558\uba74 \ud2b8\ub79c\uc7ad\uc158\uc744 \uc870\uc815\ud558\uae30 \uc704\ud574 (\ubc31\uadf8\ub77c\uc6b4\ub4dc\uc5d0\uc11c) \ucd94\uac00\ub85c \ud0a4-\uac12 \uc791\uc5c5\uc774 \uc2e4\ud589\ub418\uae30 \ub54c\ubb38\uc5d0 \uc57d\uac04\uc758 \uc624\ubc84\ud5e4\ub4dc\uac00 \ubc1c\uc0dd\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. Couchbase\uc758 \ub370\uc774\ud130\ub294 \uc790\ub3d9\uc73c\ub85c \ubd84\uc0b0\ub418\ubbc0\ub85c \ub124\ud2b8\uc6cc\ud06c\ub97c \ud1b5\ud574 \uc5ec\ub7ec \uc11c\ubc84\ub85c \uc791\uc5c5\uc774 \uc870\uc815\ub420 \uac00\ub2a5\uc131\uc774 \ub192\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
      CAS \uc791\uc5c5\ubcf4\ub2e4 ACID \ud2b8\ub79c\uc7ad\uc158\uc744 \uc0ac\uc6a9\ud558\uba74 \uc5bb\uc744 \uc218 \uc788\ub294 \ud55c \uac00\uc9c0 \uc774\uc810\uc740 Couchbase \ud2b8\ub79c\uc7ad\uc158 \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0 \uc774\ubbf8 \uc815\uad50\ud55c \uc7ac\uc2dc\ub3c4 \ub85c\uc9c1\uc774 \ub0b4\uc7a5\ub418\uc5b4 \uc788\ub2e4\ub294 \uc810\uc785\ub2c8\ub2e4. \uc774\ub294 \uc7ac\uc2dc\ub3c4 \ub85c\uc9c1\uc744 \uc9c1\uc811 \uc791\uc131\ud558\uc9c0 \uc54a\uc544\ub3c4 \ub418\ub294 \ubc29\ubc95\uc774 \ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub610\ud55c \uc0ac\uc6a9 \uc0ac\ub840\uc5d0 \uc5ec\ub7ec \uc13c\uc11c \ubb38\uc11c\ub97c \uc5c5\ub370\uc774\ud2b8\ud558\ub294 \uac83\uc774 \ud3ec\ud568\ub41c \uacbd\uc6b0 ACID \ud2b8\ub79c\uc7ad\uc158\uc774 \uad8c\uc7a5\ub429\ub2c8\ub2e4(\uc2e4\uc81c\ub85c\ub294 \ud544\uc218\uc77c \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4).<\/span><\/p>\n
      SQL++ \uc5c5\ub370\uc774\ud2b8 \uc791\uc5c5<\/h2>\n
      \uc870\uac74\ubd80 \uc5c5\ub370\uc774\ud2b8\ub97c \uc218\ud589\ud558\ub294 \ub610 \ub2e4\ub978 \uc811\uadfc \ubc29\uc2dd\uc740 SQL++ UPDATE \ucffc\ub9ac\ub97c \uc0ac\uc6a9\ud558\ub294 \uac83\uc785\ub2c8\ub2e4.<\/span><\/p>\n
      \ub2e4\uc74c\uc740 \uad6c\ud604 \uc608\uc2dc\uc785\ub2c8\ub2e4:<\/span><\/p>\n
      var retries = 3;\r\nwhile (retries > 0)\r\n{\r\n\u00a0 \u00a0 try\r\n\u00a0 \u00a0 {\r\n\u00a0 \u00a0 \u00a0 \u00a0 await _cluster.QueryAsync<dynamic>(@\"UPDATE sensordata s\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 USE KEYS $sensorId\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 SET s.speed = $newSpeed, s.unit = $newUnit, s.timeStamp = $newTimeStamp\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 WHERE DATE_DIFF_STR($newTimeStamp, s.timeStamp, 'millisecond') > 0\", options =>\r\n\u00a0 \u00a0 \u00a0 \u00a0 {\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 options.Parameter(\"sensorId\", sensorId);\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 options.Parameter(\"newSpeed\", sensorReading.Speed);\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 options.Parameter(\"newUnit\", sensorReading.Unit);\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 options.Parameter(\"newTimeStamp\", sensorReading.TimeStamp);\r\n\u00a0 \u00a0 \u00a0 \u00a0 });\r\n\u00a0 \u00a0 \u00a0 \u00a0 return;\r\n\u00a0 \u00a0 }\r\n\u00a0 \u00a0 c atch (CasMismatchException)\r\n\u00a0 \u00a0 {\r\n\u00a0 \u00a0 \u00a0 \u00a0 Console.WriteLine($\"UPDATE CAS mismatch, tries remaining: {retries}\");\r\n\u00a0 \u00a0 \u00a0 \u00a0 retries--;\r\n\u00a0 \u00a0 }\r\n}\r\nConsole.WriteLine(\"Max retries exceeded, sensor not updated\");<\/pre>\n
      (\ucc38\uace0\ub85c \uc5d0\ud3ec\ud06c \ud0c0\uc784\uc2a4\ud0ec\ud504\ub97c \uc0ac\uc6a9\ud558\uba74 \uc131\ub2a5\uc774 \ud5a5\uc0c1\ub420 \uac00\ub2a5\uc131\uc774 \ub192\uc2b5\ub2c8\ub2e4).<\/span><\/i><\/p>\n
      \ucf54\ub4dc\uc5d0\uc11c \uc9d0\uc791\ud560 \uc218 \uc788\ub4ef\uc774, SQL++ \ucffc\ub9ac\ub294 \uc55e\uc11c KV API \uc608\uc81c\uc5d0\uc11c\uc640 \ub9c8\ucc2c\uac00\uc9c0\ub85c \uc2e4\uc81c\ub85c \ub4a4\uc5d0\uc11c CAS\ub97c \uc0ac\uc6a9\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
      SQL++ \ud2b8\ub808\uc774\ub4dc \uc624\ud504<\/h2>\n
      \uc870\uac74\ubd80 \uc5c5\ub370\uc774\ud2b8\ub97c \uc704\ud55c SQL++ \uc811\uadfc \ubc29\uc2dd\uc5d0\ub294 \uba87 \uac00\uc9c0 \ub2e8\uc810\uc774 \uc788\uc2b5\ub2c8\ub2e4. \ube44\ub85d <\/span>\uc0ac\uc6a9 \ud0a4<\/span><\/em> \uc808\uc744 \uc0ac\uc6a9\ud558\uba74 \uc778\ub371\uc2a4\uac00 \ud544\uc694\ud558\uc9c0 \uc54a\uc9c0\ub9cc \ucffc\ub9ac\ub294 \uc5ec\uc804\ud788 \ucffc\ub9ac \uc11c\ube44\uc2a4\uc5d0\uc11c \uad6c\ubb38 \ubd84\uc11d\ud574\uc57c \ud569\ub2c8\ub2e4. <\/span>\ub9ce\uc740 \ub2e8\uacc4\uac00 \ud3ec\ud568\ub429\ub2c8\ub2e4.<\/span><\/a>. \ub2e4\ub978 \ucef4\ud3ec\ub10c\ud2b8\uac00 \uc774\ubbf8 \ucffc\ub9ac \uc11c\ube44\uc2a4\ub97c \uc0ac\uc6a9\ud558\uace0 \uc788\ub294 \uacbd\uc6b0 \uc2dc\uc2a4\ud15c\uc5d0 \ucd94\uac00\uc801\uc778 \ubd80\ub2f4\uc744 \uc904 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
      \uc804\ubc18\uc801\uc73c\ub85c SQL++ \uc811\uadfc \ubc29\uc2dd\uc740 \ucffc\ub9ac \uad6c\ubb38 \ubd84\uc11d\uc5d0 \ub300\ud55c \uc624\ubc84\ud5e4\ub4dc\uac00 \ucd94\uac00\ub41c\ub2e4\ub294 \uc810\uc5d0\uc11c KV API\uc640 \ub9e4\uc6b0 \uc720\uc0ac\ud558\ubbc0\ub85c, SQL++\ub85c \ud45c\ud604\ub418\ub294 \ubcf5\uc7a1\ud55c \ub85c\uc9c1\uc774 \ud2b9\ubcc4\ud788 \ud544\uc694\ud558\uac70\ub098 KV API\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc5c6\ub294 \uacbd\uc6b0\uac00 \uc544\ub2c8\ub77c\uba74 \ucd5c\uc120\uc758 \uc120\ud0dd\uc774 \uc544\ub2d0 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
      \uc774\ubca4\ud2b8<\/h2>\n
      \ub9c8\uc9c0\ub9c9\uc73c\ub85c \ub2e4\ub8e8\uace0\uc790 \ud558\ub294 \uc811\uadfc \ubc29\uc2dd\uc740 \uc774\ubca4\ud2b8 \ud65c\uc6a9\uc785\ub2c8\ub2e4.<\/span><\/p>\n
      CouchBase\uc758 \uc774\ubca4\ud2b8\ub294 \ub370\uc774\ud130 \ubcc0\uacbd \uc774\ubca4\ud2b8\uc5d0 \ube44\ub3d9\uae30\uc801\uc73c\ub85c \uc751\ub2f5\ud558\ub294 JavaScript \ud568\uc218\ub97c \uc791\uc131\ud558\uace0 \uc774\ub97c CouchBase \ud074\ub7ec\uc2a4\ud130\uc5d0 \ubc30\ud3ec\ud558\ub294 \uac83\uc73c\ub85c \uad6c\uc131\ub429\ub2c8\ub2e4.<\/span><\/p>\n
      \uc774 \ud2b9\uc815 \uc0ac\uc6a9 \uc0ac\ub840\uc758 \uacbd\uc6b0, \ucc98\uc74c\uc5d0\ub294 \uc13c\uc11c \ud310\ub3c5\uac12\uc758 \uc704\uce58\ub85c '\uc2a4\ud14c\uc774\uc9d5' \uceec\ub809\uc158\uc744 \uc0ac\uc6a9\ud558\ub294 \uac83\uc774 \uac00\uc7a5 \uc88b\uc740 \ubc29\ubc95\uc774\ub77c\uace0 \uc0dd\uac01\ud569\ub2c8\ub2e4. \uc21c\uc11c\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/span><\/p>\n
        \n
      1. \n
          \n
        1. \uc218\uc2e0\ub418\ub294 \uc13c\uc11c \ud310\ub3c5\uac12\uc740 '\uc2a4\ud14c\uc774\uc9d5' \uceec\ub809\uc158\uc5d0 \uae30\ub85d\ub429\ub2c8\ub2e4.<\/span><\/li>\n
        2. \uc774\ubca4\ud2b8 \uc628\uc5c5\ub370\uc774\ud2b8<\/em> \ud568\uc218\ub294 \uc0c8\ub85c\uc6b4 \uc13c\uc11c \ud310\ub3c5\uac12\uc5d0 \uc751\ub2f5\ud569\ub2c8\ub2e4.<\/span><\/li>\n
        3. \uadf8\ub9ac\uace0 \uc628\uc5c5\ub370\uc774\ud2b8<\/em> \ud568\uc218\ub294 \"\ud604\uc7ac\" \uceec\ub809\uc158\uc758 \ud574\ub2f9 \ubb38\uc11c\uc5d0 \ub300\ud574 \ud0c0\uc784\uc2a4\ud0ec\ud504\ub97c \ud655\uc778\ud569\ub2c8\ub2e4.<\/span><\/li>\n
        4. \ud0c0\uc784\uc2a4\ud0ec\ud504\uac00 \ub354 \ucd5c\uc2e0\uc778 \uacbd\uc6b0 '\ud604\uc7ac' \uceec\ub809\uc158\uc758 \ubb38\uc11c\uac00 \uc5c5\ub370\uc774\ud2b8\ub429\ub2c8\ub2e4.<\/span><\/li>\n<\/ol>\n<\/li>\n<\/ol>\n
          \uc628\uc5c5\ub370\uc774\ud2b8<\/span><\/em> \ubb38\uc11c\uac00 \uc0dd\uc131\ub418\uba74 \uc2e4\ud589\ub429\ub2c8\ub2e4. <\/span>\ub610\ub294<\/span><\/i> \uc5c5\ub370\uc774\ud2b8\ub418\ubbc0\ub85c \uc774\uc804 \ubb38\uc11c\ub97c \uc2a4\ud14c\uc774\uc9d5 \uc0c1\ud0dc\ub85c \ub450\uc5b4\ub3c4 \uad1c\ucc2e\uc2b5\ub2c8\ub2e4(\uc774\ub807\uac8c \ud558\uba74 \uc774\ubca4\ud2b8 \ucf54\ub4dc\uac00 \uac04\uc18c\ud654\ub429\ub2c8\ub2e4). \ub610\ud55c \uceec\ub809\uc158\uc5d0 TTL\uc744 \uc124\uc815\ud558\uc5ec \ud55c\ub3d9\uc548 \uc13c\uc11c \uc218\uce58\uac00 \uc5c5\ub370\uc774\ud2b8\ub418\uc9c0 \uc54a\uc73c\uba74 \uc790\ub3d9\uc73c\ub85c \uc815\ub9ac\ub418\ub3c4\ub85d \ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
          \ub2e4\uc74c\uc740 \uc774 \ub514\uc790\uc778\uacfc \ud568\uaed8 \uc791\ub3d9\ud558\ub294 \uc774\ubca4\ud2b8 \ud568\uc218\uc758 \uc608\uc2dc\uc785\ub2c8\ub2e4:<\/span><\/p>\n
          function OnUpdate(doc, meta) {\r\n\u00a0 \u00a0 \/\/ Only process documents with a \"timestamp\"\r\n\u00a0 \u00a0 if (doc.timestamp) {\r\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ Extract timestamp and sensor ID from the staged document\r\n\u00a0 \u00a0 \u00a0 \u00a0 var stagedTimestamp = doc.timestamp;\r\n\r\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ note that this will loop indefinitely\r\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ but you can also limit it to a certain number of reties if you wish\r\n\u00a0 \u00a0 \u00a0 \u00a0 while(true) {\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ Get the current document for the same sensor ID from the \"destination\" collection\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 var currentDoc = dst_col[meta.id];\r\n\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ If there is no current document, or the staged timestamp is later than the current timestamp, update the current document\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (!currentDoc || stagedTimestamp > currentDoc.timestamp) {\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ dst_col is a READ+WRITE ALIAS\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 dst_col[meta.id] = doc;\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ the whole document is overwritten, but you can also choose to override certain fields if you wish\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ src_col is a READ ALIAS\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 var result = couchbase.get(src_col, meta);\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (result.success) {\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (result.meta.cas == meta.cas) {\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ the document was unchanged in the stage collection we are done\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 break;\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 doc = result.doc;\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 stagedTimestamp = doc.timestamp;\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 } else {\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (result.error.key_not_found) {\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ this might be okay, assuming 'staging' collection gets cleaned up or has a TTL\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ again, this will depend on what kind of retry logic you have\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 break;\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 } else {\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 log('failure could not read stage adv. get: id',meta.id,'result',result);\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }\r\n\u00a0 \u00a0 \u00a0 \u00a0 }\r\n\u00a0 \u00a0 }\r\n}<\/pre>\n
          \ud574\ub2f9 \uc774\ubca4\ud2b8 \ud568\uc218\uc5d0 \ub300\ud55c \uad6c\uc131\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/span><\/p>\n
          \"Eventing<\/p>\n
          \uc774\ubca4\ud2b8 \ud2b8\ub808\uc774\ub4dc \uc624\ud504<\/h2>\n
          \uc774 \ucf54\ub4dc\uc5d0\uc11c \ub099\uad00\uc801\uc778 CAS \uc7a0\uae08\uc774 \uc0ac\uc6a9\ub418\uace0 \uc788\uc74c\uc744 \ub2e4\uc2dc \ud55c \ubc88 \uc8fc\ubaa9\ud558\uc138\uc694. \uc0ac\uc2e4 \uc774 \ucf54\ub4dc\ub294 \uc55e\uc11c KV API\ub97c \uc0ac\uc6a9\ud55c \ucf54\ub4dc\uc758 \uc790\ubc14\uc2a4\ud06c\ub9bd\ud2b8 \ubc84\uc804\uc774\ub77c\uace0 \ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
          \ud55c \uac00\uc9c0 \uc911\uc694\ud55c \ucc28\uc774\uc810\uc740 \uc774 \uae30\ub2a5\uc774 Couchbase \ud074\ub7ec\uc2a4\ud130 \uc790\uccb4\uc5d0\uc11c \uc2e4\ud589\ub41c\ub2e4\ub294 \uac83\uc785\ub2c8\ub2e4. \uc774\uac83\uc774 \ubc14\ub85c \uc774\ubca4\ud2b8 \uae30\ub2a5\uc758 \ud575\uc2ec \uc774\uc810\uc785\ub2c8\ub2e4. \uc13c\uc11c \ub370\uc774\ud130\uc758 \ucd9c\ucc98\uac00 \uc5b4\ub514\ub4e0 \uc0c1\uad00\uc5c6\uc774 Couchbase\uc758 \uc774\ubca4\ud2b8 \uae30\ub2a5\uc740 \ub370\uc774\ud130\uac00 \ucc98\ub9ac\ub418\ub3c4\ub85d \ubcf4\uc7a5\ud569\ub2c8\ub2e4. \ub85c\uc9c1\uc744 \ub370\uc774\ud130\uc5d0 \uac00\uae5d\uac8c \uc720\uc9c0\ud569\ub2c8\ub2e4. \ub300\uc2e0 KV API\ub97c \uc0ac\uc6a9\ud558\ub294 \ud074\ub77c\uc774\uc5b8\ud2b8\uac00 \ub450 \uac1c \uc774\uc0c1\uc774\ub77c\uba74 \ub3d9\uc77c\ud55c \ucf54\ub4dc\ub97c \ub450 \uac1c \uc774\uc0c1 \uad6c\ud604\ud574\uc57c \ud55c\ub2e4\ub294 \ub73b\uc785\ub2c8\ub2e4. \uc774\ub807\uac8c \ud558\uba74 \ub85c\uc9c1\uc744 \uc5ec\ub7ec \uacf3\uc5d0\uc11c \uc5c5\ub370\uc774\ud2b8\ud574\uc57c \ud558\ubbc0\ub85c \ub85c\uc9c1\uc774 \ubcc0\uacbd\ub420 \ub54c \ubb38\uc81c\uac00 \ubc1c\uc0dd\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
          \uadf8\ub7ec\ub098 SQL++\uc640 \ub9c8\ucc2c\uac00\uc9c0\ub85c \uc774\ubca4\ud2b8\uc5d0\ub3c4 \uc57d\uac04\uc758 \uc624\ubc84\ud5e4\ub4dc\uac00 \ubc1c\uc0dd\ud569\ub2c8\ub2e4. \uc774 \uacbd\uc6b0\uc5d0\ub294 \uc5ec\ub7ec \uceec\ub809\uc158\uacfc \uc774\ubca4\ud2b8 \uc11c\ube44\uc2a4 \uc790\uccb4\uc785\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \ud504\ub85c\ub355\uc158 \ud658\uacbd\uc5d0\uc11c Couchbase\uc758 \ucd94\uac00 \ub178\ub4dc\uac00 \ud544\uc694\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub610\ud55c \ud604\uc7ac Couchbase Server \ucee4\ubba4\ub2c8\ud2f0\uc5d0\uc11c\ub294 Eventing\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
          \uc694\uc57d<\/h2>\n
          Couchbase\ub294 \uc0ac\uc6a9 \uc0ac\ub840\uc5d0 \ub9de\ub294 \uc635\uc158\uacfc \uc808\ucda9\uc548\uc744 \uc81c\uacf5\ud558\ub294 \ub2e4\uc911 \ubaa8\ub378 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc785\ub2c8\ub2e4. \uc774 \uac8c\uc2dc\ubb3c\uc5d0\uc11c\ub294 \uc13c\uc11c \ub370\uc774\ud130 \uc5c5\ub370\uc774\ud2b8\uc758 \uc0ac\uc6a9 \uc0ac\ub840\uc5d0 \ub300\ud574 4\uac00\uc9c0 \ub370\uc774\ud130 \uc561\uc138\uc2a4 \ud328\ud134\uacfc \uac01\uac01\uc758 \uc7a5\ub2e8\uc810\uc744 \ub2e4\ub8e8\uc5c8\uc2b5\ub2c8\ub2e4:<\/span><\/p>\n