170 lines
23 KiB
JSON
170 lines
23 KiB
JSON
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{
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"topic": "database-advanced",
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"type": "short_answer",
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"schema_version": "1.0.0",
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"generated": "2026-09-09T00:00:00+08:00",
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"questions": [
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{
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"id": "sa-001",
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"type": "short_answer",
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"difficulty": 2,
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"tags": [
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"mysql",
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"bplus-tree",
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"index",
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"composite-index",
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"covering-index"
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],
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"question": "隸ｷ隗｣驥� InnoDB 荳ｭ閨夂ｰ�ｴ｢蠑穂ｸ朱撼閨夂ｰ�ｴ｢蠑慕噪蛹ｺ蛻ｫ�悟ｹｶ隸ｴ譏手＃蜷育ｴ｢蠑慕噪譛蟾ｦ蜑咲ｼ蜴溷�蜥瑚ｦ�尠邏｢蠑慕噪蜷ｫ荵峨る宙蟇ｹ陦ｨ orders(user_id, order_id, amount, status)�瑚凶髴隕�ｫ俶譜謇ｧ陦御ｻ･荳倶ｸ臥ｧ肴衍隸｢�悟�蛻ｫ蠎泌ｦゆｽ戊ｮｾ隶｡邏｢蠑包ｼ歃n1. SELECT * FROM orders WHERE user_id = 100 AND order_id = 'A001'\n2. SELECT user_id, order_id FROM orders WHERE user_id = 100\n3. SELECT amount FROM orders WHERE order_id = 'A001'",
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"answer": "荳縲∬★邁�ｴ｢蠑穂ｸ朱撼閨夂ｰ�ｴ｢蠑慕噪蛹ｺ蛻ｫ�喀n閨夂ｰ�ｴ｢蠑包ｼ唔nnoDB 荳ｭ謨ｰ謐ｮ陦梧潔荳ｻ髞ｮ鬘ｺ蠎冗黄逅�ｭ伜お�梧ｯ丈ｸｪ InnoDB 陦ｨ譛我ｸ比ｻ�怏荳荳ｪ閨夂ｰ�ｴ｢蠑輔ゆｸｻ髞ｮ蜊ｳ閨夂ｰ�ｴ｢蠑包ｼ幄凶譌�荳ｻ髞ｮ�碁画叫隨ｬ荳荳ｪ蜚ｯ荳髱樒ｩｺ邏｢蠑包ｼ幃�豐｡譛牙�逕滓�髫占酪逧� row_id 菴應ｸｺ閨夂ｰ�ｴ｢蠑輔ょ掌蟄占鰍轤ｹ蟄伜お螳梧紛陦梧焚謐ｮ縲�n髱櫁★邁�ｴ｢蠑包ｼ井ｺ檎ｺｧ邏｢蠑包ｼ会ｼ壼掌蟄占鰍轤ｹ蟄伜お逧�弍荳ｻ髞ｮ蛟ｼ閠碁撼螳梧紛陦梧焚謐ｮ縲る夊ｿ�撼閨夂ｰ�ｴ｢蠑墓衍隸｢髱樒ｴ｢蠑募�譌ｶ�碁怙隕∵�ｹ謐ｮ荳ｻ髞ｮ蝗櫁｡ｨ�亥屓陦ｨ譟･隸｢�会ｼ悟叉騾夊ｿ�ｸｻ髞ｮ蜀榊芦閨夂ｰ�ｴ｢蠑穂ｸｭ譟･謇ｾ螳梧紛陦後�n\n莠後∵怙蟾ｦ蜑咲ｼ蜴溷��喀n閨泌粋邏｢蠑� (a, b, c) 謖我ｻ主ｷｦ蛻ｰ蜿ｳ逧�｡ｺ蠎丞源驟阪よ衍隸｢譚｡莉ｶ蠢�｡ｻ莉取怙蟾ｦ蛻怜ｼ蟋区燕閭ｽ蜻ｽ荳ｭ邏｢蠑輔ょ庄莉･霍ｳ霑�ｸｭ髣ｴ蛻怜雛�滉ｸ崎�縲ゆｾ句ｦ� (a, b, c) 邏｢蠑包ｼ係HERE a=1 AND c=3 蜿ｪ閭ｽ逕ｨ蛻ｰ a 蛻暦ｼ慶 蛻玲裏豕穂ｽｿ逕ｨ邏｢蠑輔�n\n荳峨∬ｦ�尠邏｢蠑包ｼ喀n蠖捺衍隸｢謇髴逧�園譛牙�驛ｽ蛹�性蝨ｨ譟蝉ｸｪ邏｢蠑穂ｸｭ譌ｶ�梧裏髴蝗櫁｡ｨ�檎ｧｰ荳ｺ隕�尠邏｢蠑輔�XPLAIN 荳ｭ Extra 蛻玲仞遉ｺ Using index 陦ｨ遉ｺ菴ｿ逕ｨ莠�ｦ�尠邏｢蠑輔�n\n髓亥ｯｹ荳臥ｧ肴衍隸｢逧�ｴ｢蠑戊ｮｾ隶｡�喀n1. WHERE user_id=100 AND order_id='A001'�壼ｻｺ閨泌粋邏｢蠑� (user_id, order_id)�御ｸ､蛻怜插蝨ｨ邏｢蠑穂ｸｭ�悟庄邊ｾ遑ｮ螳壻ｽ阪�n2. SELECT user_id, order_id WHERE user_id=100�壼ｻｺ閨泌粋邏｢蠑� (user_id, order_id)�蛍ser_id 逕ｨ莠手ｿ�ｻ､�蛍ser_id 蜥� order_id 蝮�惠邏｢蠑穂ｸｭ�梧桷謌占ｦ�尠邏｢蠑包ｼ梧裏髴蝗櫁｡ｨ縲�n3. SELECT amount WHERE order_id='A001'�壼ｺ泌黒迢ｬ蟒ｺ order_id 邏｢蠑包ｼ悟屏荳ｺ amount 荳榊惠閨泌粋邏｢蠑穂ｸｭ�亥叉菴ｿ譛芽＃蜷育ｴ｢蠑穂ｹ滓裏豕暮∩蜈榊屓陦ｨ蜿� amount�峨ょｦよ棡譟･隸｢鬚醍ｹ�ｼ悟庄閠�剔蟒ｺ隕�尠邏｢蠑� (order_id, amount) 譚･驕ｿ蜈榊屓陦ｨ縲�",
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"keywords": [
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"閨夂ｰ�ｴ｢蠑�",
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"髱櫁★邁�ｴ｢蠑�",
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"莠檎ｺｧ邏｢蠑�",
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"蝗櫁｡ｨ",
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"荳ｻ髞ｮ",
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"蜿ｶ蟄占鰍轤ｹ",
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"譛蟾ｦ蜑咲ｼ",
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"隕�尠邏｢蠑�",
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"Using index",
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"閨泌粋邏｢蠑�"
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],
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"scoring_rubric": "貊｡蛻�10蛻�ｼ�1�画ｭ｣遑ｮ謠剰ｿｰ閨夂ｰ�ｴ｢蠑穂ｸ朱撼閨夂ｰ�ｴ｢蠑慕噪蛹ｺ蛻ｫ�亥性蜿ｶ蟄占鰍轤ｹ蟄伜お蜀�ｮｹ蟾ｮ蠑ゑｼ牙ｾ�3蛻�ｼ�2�画ｭ｣遑ｮ隗｣驥頑怙蟾ｦ蜑咲ｼ蜴溷�蠕�2蛻�ｼ�3�画ｭ｣遑ｮ隗｣驥願ｦ�尠邏｢蠑募ｾ�2蛻�ｼ�4�我ｸ蛾％譟･隸｢逧�ｴ｢蠑戊ｮｾ隶｡蜷�1蛻�らｼｺ蟆大屓陦ｨ讎ょｿｵ謇｣1蛻�ｼ檎ｼｺ蟆題ｦ�尠邏｢蠑穂ｸ散sing index蜈ｳ閨疲殴1蛻��",
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"explanation": "閨夂ｰ�ｴ｢蠑慕噪譬ｸ蠢�音蠕∵弍縲梧焚謐ｮ蜊ｳ邏｢蠑輔坂披泌掌蟄占鰍轤ｹ逶ｴ謗･蟄伜お螳梧紛陦梧焚謐ｮ�悟屏豁､荳荳ｪ陦ｨ蜿ｪ閭ｽ譛我ｸ荳ｪ閨夂ｰ�ｴ｢蠑輔る撼閨夂ｰ�ｴ｢蠑包ｼ井ｺ檎ｺｧ邏｢蠑包ｼ臥噪蜿ｶ蟄占鰍轤ｹ蜿ｪ蟄倅ｸｻ髞ｮ蛟ｼ�梧衍隸｢髱樒ｴ｢蠑募�譌ｶ髴隕√悟屓陦ｨ縲榊芦閨夂ｰ�ｴ｢蠑募�譟･荳谺｡縲よ怙蟾ｦ蜑咲ｼ蜴溷�譏ｯ閨泌粋邏｢蠑慕噪蛹ｹ驟崎ｧ���梧悽雍ｨ譏ｯ B+ 譬台ｻ主ｷｦ蛻ｰ蜿ｳ騾仙�謗貞ｺ冗噪扈捺桷蜀ｳ螳夂噪縲りｦ�尠邏｢蠑墓弍荳遘堺ｼ伜喧謇区ｮｵ�壼ｦよ棡邏｢蠑募ｷｲ扈丞桁蜷ｫ莠�衍隸｢髴隕∫噪謇譛牙��悟ｰｱ螳悟�荳埼怙隕∝屓陦ｨ�悟､ｧ蟷�㍼蟆� I/O縲りｿ吩ｸ芽��蜷梧桷謌蝉ｺ� MySQL 邏｢蠑穂ｼ伜喧逧�渕遑譯�楔縲�",
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"source": null,
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"related": []
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},
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{
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"id": "sa-002",
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"type": "short_answer",
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"difficulty": 3,
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"tags": [
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"mysql",
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"explain",
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"slow-query"
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],
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"question": "隸ｷ隗｣驥� MySQL EXPLAIN 謇ｧ陦瑚ｮ｡蛻剃ｸｭ type 蛻怜柱 Extra 蛻礼噪蟶ｸ隗∝ｼ蜿雁�蜷ｫ荵峨る宙蟇ｹ莉･荳区�譟･隸｢�瑚ｯｷ蛻�梵 EXPLAIN 霎灘�蟷ｶ扈吝�莨伜喧蟒ｺ隶ｮ�喀n\nSELECT u.name, o.total FROM users u JOIN orders o ON u.id = o.user_id WHERE o.created_at > '2025-01-01' AND u.status = 1 GROUP BY u.name ORDER BY o.total DESC LIMIT 10;\n\n蛛�ｮｾ EXPLAIN 霎灘�荳ｺ�嗾ype=ALL, rows=500000, Extra=Using temporary; Using filesort縲�",
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"answer": "荳縲》ype 蛻怜ｸｸ隗∝ｼ�井ｻ主･ｽ蛻ｰ蟾ｮ�会ｼ喀n1. system�夊｡ｨ蜿ｪ譛我ｸ陦鯉ｼ檎ｳｻ扈溯｡ｨ�梧怙莨倥�n2. const�夐夊ｿ�ｸｻ髞ｮ謌門髪荳邏｢蠑募黒陦梧衍謇ｾ�梧怙螟壼源驟堺ｸ陦鯉ｼ悟ｦ� WHERE id=1縲�n3. eq_ref�壼�閨疲衍隸｢荳ｭ�瑚｢ｫ鬩ｱ蜉ｨ陦ｨ騾夊ｿ�ｸｻ髞ｮ謌門髪荳邏｢蠑戊ｿ幄｡檎ｭ牙ｼ蛹ｹ驟搾ｼ梧ｯ乗ｬ｡蜈ｳ閨泌宵蛹ｹ驟堺ｸ陦後�n4. ref�夐夊ｿ�勸騾夂ｴ｢蠑戊ｿ幄｡檎ｭ牙ｼ蛹ｹ驟搾ｼ悟庄閭ｽ霑泌屓螟夊｡後�n5. range�夂ｴ｢蠑戊激蝗ｴ謇ｫ謠擾ｼ悟ｦ� WHERE id > 10縲仝HERE id IN (1,2,3)縲�n6. index�壼�邏｢蠑墓沖謠擾ｼ碁″蜴�紛荳ｪ邏｢蠑墓�托ｼ井ｸ榊屓陦ｨ�峨�n7. ALL�壼�陦ｨ謇ｫ謠擾ｼ梧怙蟾ｮ�悟ｺ泌ｰｽ驥城∩蜈阪�n\n莠後・xtra 蛻怜ｸｸ隗∝ｼ�喀n1. Using index�夊ｦ�尠邏｢蠑包ｼ梧裏髴蝗櫁｡ｨ�悟･ｽ縲�n2. Using where�售erver 螻りｿ幄｡御ｺ�｢晏､冶ｿ�ｻ､�御ｸ榊ｮ悟�蝨ｨ蟄伜お蠑墓梼螻ょｮ梧�縲�n3. Using temporary�壻ｽｿ逕ｨ莠�ｸｴ譌ｶ陦ｨ�悟ｸｸ隗∽ｺ� GROUP BY / DISTINCT 遲画桃菴懶ｼ碁怙蜈ｳ豕ｨ諤ｧ閭ｽ縲�n4. Using filesort�夐怙隕�｢晏､匁賜蠎乗桃菴懶ｼ梧悴蛻ｩ逕ｨ邏｢蠑墓賜蠎擾ｼ悟庄閭ｽ譏ｯ諤ｧ閭ｽ逑ｶ鬚医�n5. Using join buffer�夊ｿ樊磁譟･隸｢荳ｭ陲ｫ鬩ｱ蜉ｨ陦ｨ譌�蜿ｯ逕ｨ邏｢蠑包ｼ御ｽｿ逕ｨ莠� Join Buffer縲�n6. Select tables optimized away�壻ｼ伜喧蝎ｨ逶ｴ謗･莉守ｴ｢蠑墓�扈溯ｮ｡菫｡諱ｯ荳ｭ闔ｷ蜿也ｻ捺棡�梧裏髴謇ｫ謠剰｡ｨ縲�n\n荳峨�宙蟇ｹ扈吝ｮ壽衍隸｢逧�ｼ伜喧蟒ｺ隶ｮ�喀n蠖灘燕 type=ALL 陦ｨ遉ｺ蜈ｨ陦ｨ謇ｫ謠� orders 陦ｨ�域� users 陦ｨ�会ｼ罫ows=500000 隸ｴ譏取沖謠丈ｺ�､ｧ驥剰｡後�xtra 荳ｭ Using temporary 蜥� Using filesort 隸ｴ譏� GROUP BY 蜥� ORDER BY 驛ｽ譌�豕募茜逕ｨ邏｢蠑輔�n\n莨伜喧謗ｪ譁ｽ�喀n1. 荳ｺ orders 陦ｨ蟒ｺ邏｢蠑� (created_at, user_id, total)窶披把reated_at 逕ｨ莠� WHERE 霑�ｻ､�蛍ser_id 逕ｨ莠� JOIN�荊otal 逕ｨ莠手ｦ�尠謗貞ｺ丞柱 SELECT縲�n2. 荳ｺ users 陦ｨ蟒ｺ邏｢蠑� (status, id, name)窶披敗tatus 霑�ｻ､�景d 蜈ｳ閨費ｼ系ame 隕�尠 GROUP BY縲�n3. 螯ょ�鬘ｵ荳肴ｷｱ�悟庄閠�剔蟒ｶ霑溷�閨比ｼ伜喧�壼�譟･蟄先衍隸｢闔ｷ蜿� id 蛻苓｡ｨ�悟�蜈ｳ閨泌叙螳梧紛謨ｰ謐ｮ縲�n4. 菴ｿ逕ｨ SHOW WARNINGS 譟･逵倶ｼ伜喧蝎ｨ驥榊�蜷守噪 SQL�檎｡ｮ隶､譟･隸｢譏ｯ蜷ｦ陲ｫ豁｣遑ｮ莨伜喧縲�",
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"keywords": [
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"EXPLAIN",
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"type",
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"ALL",
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"const",
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"eq_ref",
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"ref",
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"range",
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"Extra",
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"Using temporary",
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"Using filesort",
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"Using index",
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"諷｢譟･隸｢",
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"蜈ｨ陦ｨ謇ｫ謠�",
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"邏｢蠑戊ｮｾ隶｡"
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],
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"scoring_rubric": "貊｡蛻�10蛻�ｼ�1�画ｭ｣遑ｮ隗｣驥� type 蛻苓�蟆�4荳ｪ蟶ｸ隗∝ｼ�亥性蜈ｨ陦ｨ謇ｫ謠就LL�牙ｾ�3蛻�ｼ�2�画ｭ｣遑ｮ隗｣驥� Extra 蛻苓�蟆�3荳ｪ蟶ｸ隗∝ｼ�亥性Using temporary蜥袈sing filesort�牙ｾ�3蛻�ｼ�3�蛾宙蟇ｹ扈吝ｮ壽衍隸｢扈吝�閾ｳ蟆�2譚｡蜷育炊莨伜喧蟒ｺ隶ｮ蠕�2蛻�ｼ�4�芽�豁｣遑ｮ隸�悪 type=ALL 蜥� Extra=Using temporary; Using filesort 逧�琉鬚伜ｹｶ蜈ｳ閨泌芦蜈ｷ菴楢｡ｨ蠕�2蛻��",
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"explanation": "EXPLAIN 譏ｯ MySQL 諷｢譟･隸｢蛻�梵逧��ｸ蠢�ｷ･蜈ｷ縲Ｕype 蛻怜渚譏�莠�ｭ伜お蠑墓梼譟･謇ｾ謨ｰ謐ｮ逧�婿蠑擾ｼ窟LL 譏ｯ譛蟾ｮ逧��陦ｨ謇ｫ謠擾ｼ慶onst/eq_ref 譏ｯ譛莨倡噪蜊戊｡梧衍謇ｾ縲�xtra 蛻玲少遉ｺ莠�｢晏､匁鴬陦御ｿ｡諱ｯ�啅sing temporary 陦ｨ遉ｺ髴隕∝�蟒ｺ荳ｴ譌ｶ陦ｨ譚･螳梧� GROUP BY�袈sing filesort 陦ｨ遉ｺ髴隕�｢晏､也噪謗貞ｺ乗桃菴懶ｼ瑚ｿ吩ｸ､閠�惠螟ｧ謨ｰ謐ｮ驥丈ｸ区弍荳･驥咲噪諤ｧ閭ｽ髫先ぅ縲ょ惠譛ｬ萓倶ｸｭ�荊ype=ALL + Using temporary + Using filesort 扈�粋陦ｨ譏取衍隸｢螳悟�豐｡譛牙茜逕ｨ蛻ｰ邏｢蠑包ｼ碁怙隕�夊ｿ�ｷｻ蜉�蜷磯ら噪閨泌粋邏｢蠑墓擂蜷梧慮隕�尠霑�ｻ､縲∬ｿ樊磁蜥梧賜蠎城怙豎ゅ�",
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"source": null,
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"related": []
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},
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{
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"id": "sa-003",
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"type": "short_answer",
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"difficulty": 3,
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"tags": [
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"redis",
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"cluster",
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"slot",
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"consistent-hashing"
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],
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"question": "Redis Cluster 菴ｿ逕ｨ 16384 荳ｪ slot 蟇ｹ謨ｰ謐ｮ霑幄｡悟�迚�りｯｷ蝗樒ｭ費ｼ喀n1. slot 逧�ｼ門捷闌�峩蜥悟�驟肴婿蠑乗弍莉荵茨ｼ歃n2. 蠖灘ｮ｢謌ｷ遶ｯ蜿鷹∽ｸ荳ｪ GET key 蜻ｽ莉､譌ｶ�軍edis Cluster 螯ゆｽ慕｡ｮ螳夊ｯ･ key 蠎碑ｯ･逕ｱ蜩ｪ荳ｪ闃らせ螟�炊�歃n3. 蝨ｨ郤ｿ謇ｩ螳ｹ�亥｢槫刈荳荳ｪ譁ｰ闃らせ�臥噪螳梧紛豬∫ｨ区弍莉荵茨ｼ溽ｼｩ螳ｹ譌ｶ髴隕∵ｳｨ諢丈ｻ荵茨ｼ歃n4. 螯よ棡蝨ｨ謇ｩ螳ｹ霑�ｨ倶ｸｭ�悟ｮ｢謌ｷ遶ｯ隶ｿ髣ｮ莠�ｸ荳ｪ豁｣蝨ｨ霑∫ｧｻ荳ｭ逧� slot�御ｼ壼書逕滉ｻ荵茨ｼ�",
|
||
|
|
"answer": "1. Slot 郛門捷荳主�驟搾ｼ喀n郛門捷闌�峩荳ｺ 0-16383�亥� 16384 荳ｪ slot�峨よｯ丈ｸｪ Redis Cluster 闃らせ雍溯ｴ｣荳驛ｨ蛻� slot縲ょ�驟肴婿蠑冗罰 cluster.conf 荳ｭ逧� cluster-config-file 隶ｰ蠖包ｼ碁ｻ倩ｮ､蝮�劇蛻��縲ゆｾ句ｦ� 3 闃らせ髮�ｾ､�瑚鰍轤ｹ A 雍溯ｴ｣ 0-5460�瑚鰍轤ｹ B 雍溯ｴ｣ 5461-10922�瑚鰍轤ｹ C 雍溯ｴ｣ 10923-16383縲�n\n2. Key 蛻ｰ闃らせ逧�ｷｯ逕ｱ�喀n隶｡邂怜�蠑擾ｼ嘖lot = CRC16(key) % 16384縲�RC16 譏ｯ蠕ｪ邇ｯ蜀嶺ｽ呎�｡鬪檎ｮ玲ｳ輔ょｮ｢謌ｷ遶ｯ�亥ｦ� redis-cli�牙惠蜿鷹∝多莉､蜑榊�隶｡邂� slot�檎┯蜷取�ｹ謐ｮ髮�ｾ､蜈�焚謐ｮ��lot 蛻ｰ闃らせ逧�丐蟆��邉ｻ�牙ｰ�ｯｷ豎ょ書騾∝芦蟇ｹ蠎皮噪 master 闃らせ縲ょｦよ棡隸ｷ豎ょ書蛻ｰ莠�漠隸ｯ闃らせ�瑚ｯ･闃らせ莨夊ｿ泌屓 MOVED 驥榊ｮ壼髄蜩榊ｺ費ｼ悟ｮ｢謌ｷ遶ｯ譖ｴ譁ｰ霍ｯ逕ｱ郛灘ｭ伜錘驥榊書縲３edis 3.2+ 霑俶髪謖� ASK 荳ｴ譌ｶ驥榊ｮ壼髄�育畑莠� slot 霑∫ｧｻ荳ｭ�峨�n\n3. 蝨ｨ郤ｿ謇ｩ螳ｹ豬∫ｨ具ｼ喀na) 蜷ｯ蜉ｨ譁ｰ闃らせ蟷ｶ蜉�蜈･髮�ｾ､�嗷edis-cli --cluster add-node <new_node> <existing_node>\nb) 蛻�� slot�嗷edis-cli --cluster reshard <node>�梧欠螳夊ｦ∬ｿ∫ｧｻ逧� slot 謨ｰ驥丞柱逶ｮ譬�鰍轤ｹ縲らｳｻ扈滉ｼ夊�蜉ｨ騾画叫貅占鰍轤ｹ縲�nc) 霑∫ｧｻ霑�ｨ具ｼ壼ｯｹ豈丈ｸｪ隕∬ｿ∫ｧｻ逧� slot�梧ｺ占鰍轤ｹ謇ｧ陦� MIGRATE 蜻ｽ莉､蟆� slot 荳ｭ逧�園譛� key 霑∫ｧｻ蛻ｰ逶ｮ譬�鰍轤ｹ縲りｿ∫ｧｻ譛滄龍貅占鰍轤ｹ蟇ｹ霑∫ｧｻ荳ｭ逧� key 逧��謫堺ｽ應ｼ夊ｧｦ蜿� ASK 驥榊ｮ壼髄縲�nd) 遑ｮ隶､螳梧��嗷edis-cli --cluster check 鬪瑚ｯ�寔鄒､迥ｶ諤√�n\n郛ｩ螳ｹ豕ｨ諢丈ｺ矩｡ｹ�喀na) 蜈亥ｰ�ｦ∽ｸ狗ｺｿ闃らせ逧� slot 霑∫ｧｻ蛻ｰ蜈ｶ莉冶鰍轤ｹ��eshard�峨�nb) 遑ｮ隶､隸･闃らせ荳顔噪謇譛� slot 蟾ｲ霑∫ｧｻ螳梧ｯ包ｼ�luster nodes 荳ｭ隸･闃らせ荳榊�雍溯ｴ｣莉ｻ菴� slot�峨�nc) 蛻�髯､闃らせ�嗷edis-cli --cluster del-node縲�nd) 豕ｨ諢擾ｼ壼ｦよ棡隕∽ｸ狗ｺｿ逧�弍 master 闃らせ�碁怙隕∝�螟�炊蜈ｶ slave 闃らせ�亥� del slave�悟� del master�梧�閠��蟆� slave 扈大ｮ壼芦蜈ｶ莉� master�峨�n\n4. 隶ｿ髣ｮ霑∫ｧｻ荳ｭ slot 逧�｡御ｸｺ�喀nRedis Cluster 蝨ｨ slot 霑∫ｧｻ霑�ｨ倶ｸｭ謾ｯ謖� ASK 驥榊ｮ壼髄縲ょ�菴捺ｵ∫ｨ具ｼ喀n- 螳｢謌ｷ遶ｯ蜿鷹∝多莉､蛻ｰ貅占鰍轤ｹ縲�n- 貅占鰍轤ｹ蜿醍鴫隸･ slot 豁｣蝨ｨ霑∫ｧｻ蛻ｰ逶ｮ譬�鰍轤ｹ��MPORTING 迥ｶ諤�ｼ会ｼ悟ｦよ棡 key 霑伜惠貅占鰍轤ｹ蛻呎ｭ｣蟶ｸ螟�炊�帛ｦよ棡 key 蟾ｲ霑∬ｵｰ�瑚ｿ泌屓 ASK 驥榊ｮ壼髄蛻ｰ逶ｮ譬�鰍轤ｹ縲�n- 螳｢謌ｷ遶ｯ謾ｶ蛻ｰ ASK 蜷趣ｼ悟髄逶ｮ譬�鰍轤ｹ蜿鷹� ASKING + 蜴溷多莉､縲よｳｨ諢� ASK 譏ｯ蜊墓ｬ｡驥榊ｮ壼髄�御ｸ堺ｼ壽峩譁ｰ螳｢謌ｷ遶ｯ逧� slot 霍ｯ逕ｱ郛灘ｭ假ｼ井ｸ� MOVED 荳榊酔�峨�n- 霑∫ｧｻ螳梧�蜷趣ｼ梧ｺ占鰍轤ｹ蜿鷹� MOVED�悟ｮ｢謌ｷ遶ｯ豌ｸ荵�峩譁ｰ霍ｯ逕ｱ縲�",
|
||
|
|
"keywords": [
|
||
|
|
"16384",
|
||
|
|
"CRC16",
|
||
|
|
"slot",
|
||
|
|
"MOVED",
|
||
|
|
"ASK",
|
||
|
|
"reshard",
|
||
|
|
"MIGRATE",
|
||
|
|
"cluster",
|
||
|
|
"蛻�援",
|
||
|
|
"謇ｩ螳ｹ",
|
||
|
|
"郛ｩ螳ｹ",
|
||
|
|
"驥榊ｮ壼髄"
|
||
|
|
],
|
||
|
|
"scoring_rubric": "貊｡蛻�10蛻�ｼ�1�画ｭ｣遑ｮ謠剰ｿｰ slot 郛門捷闌�峩蜥� CRC16 霍ｯ逕ｱ譛ｺ蛻ｶ蠕�3蛻�ｼ�2�画ｭ｣遑ｮ隗｣驥� MOVED 蜥� ASK 驥榊ｮ壼髄逧�玄蛻ｫ蠕�2蛻�ｼ�3�画ｭ｣遑ｮ謠剰ｿｰ謇ｩ螳ｹ螳梧紛豬∫ｨ具ｼ�dd-node + reshard + MIGRATE�牙ｾ�3蛻�ｼ�4�画ｭ｣遑ｮ隸ｴ譏守ｼｩ螳ｹ豕ｨ諢丈ｺ矩｡ｹ�亥�霑∫ｧｻ slot 蜀榊唖髯､闃らせ�牙ｾ�2蛻�らｼｺ蟆� CRC16 蜈ｬ蠑乗殴1蛻�ｼ梧ｷｷ豺� MOVED 蜥� ASK 謇｣1蛻��",
|
||
|
|
"explanation": "Redis Cluster 菴ｿ逕ｨ蜩亥ｸ梧ｧｽ��ash slot�牙ｮ樒鴫謨ｰ謐ｮ蛻�援�梧弍蜈ｸ蝙狗噪蛻�ｸ�ｼ丞嶋蟶梧婿譯医�16384 霑吩ｸｪ謨ｰ蟄礼噪騾画叫譏ｯ譚�｡｡莠�鰍轤ｹ謨ｰ驥丈ｸ企剞�育ｺｦ 1000 荳ｪ�牙柱豈丈ｸｪ闃らせ髴隕∫ｻｴ謚､逧� slot 菴榊崟螟ｧ蟆擾ｼ�16384/8=2048 蟄苓鰍�牙錘逧�ｻ捺棡縲�RC16%16384 菫晁ｯ∽ｺ�焚謐ｮ蝨ｨ闃らせ髣ｴ逧�插蛹蛻�ｸ��OVED 蜥� ASK 逧�ｮｾ隶｡菴鍋鴫莠��蟶�ｼ冗ｳｻ扈滉ｸｭ縲悟ｼｺ荳閾ｴ霍ｯ逕ｱ縲堺ｸ弱御ｸｴ譌ｶ霑�ｸ｡霍ｯ逕ｱ縲咲噪蛻�ｦｻ�窟SK 莉�惠霑∫ｧｻ譛滄龍菴ｿ逕ｨ荳比ｸ肴峩譁ｰ螳｢謌ｷ遶ｯ郛灘ｭ假ｼ碁∩蜈堺ｺ��螻霍ｯ逕ｱ菫｡諱ｯ逧�ｸ堺ｸ閾ｴ縲�",
|
||
|
|
"source": null,
|
||
|
|
"related": []
|
||
|
|
},
|
||
|
|
{
|
||
|
|
"id": "sa-004",
|
||
|
|
"type": "short_answer",
|
||
|
|
"difficulty": 4,
|
||
|
|
"tags": [
|
||
|
|
"mysql",
|
||
|
|
"lock",
|
||
|
|
"deadlock"
|
||
|
|
],
|
||
|
|
"question": "隸ｷ隸ｦ扈�ｧ｣驥� MySQL InnoDB 荳ｭ莉･荳倶ｸ臥ｧ埼煤逧�玄蛻ｫ蜥悟ｺ皮畑蝨ｺ譎ｯ�喀n1. 陦碁煤��ecord Lock�噂n2. 髣ｴ髫咎煤��ap Lock�噂n3. 荳ｴ髞ｮ髞�ｼ�ext-Key Lock�噂n\n蟷ｶ蝗樒ｭ比ｻ･荳矩琉鬚假ｼ喀n- 蝨ｨ蜿ｯ驥榊､崎ｯｻ��R�蛾囈遖ｻ郤ｧ蛻ｫ荳具ｼ御ｻ･荳� SQL 莨壻ｺｧ逕滉ｻ荵育ｱｻ蝙狗噪髞�ｼ歃n SELECT * FROM accounts WHERE balance BETWEEN 1000 AND 5000 FOR UPDATE;\n �亥∞隶ｾ balance 蛻玲怏邏｢蠑包ｼ悟ｼ蛻�ｸ�ｸｺ 500, 2000, 8000�噂n- 莉荵域弍豁ｻ髞�ｼ櫪ySQL 螯ゆｽ墓｣豬区ｭｻ髞�ｼ溷ｦゆｽ暮｢�亟豁ｻ髞�ｼ�",
|
||
|
|
"answer": "荳縲∽ｸ臥ｧ埼煤逧�玄蛻ｫ�喀n1. 陦碁煤��ecord Lock�会ｼ夐煤螳夂ｴ｢蠑戊ｮｰ蠖墓悽霄ｫ縲ょ宵髞∽ｽ剰ｯ･陦鯉ｼ悟�莉紋ｺ句苅蜿ｯ莉･菫ｮ謾ｹ蜷御ｸ闌�峩逧��莉冶｡後よ弍譛扈�ｲ貞ｺｦ逧�煤縲�n\n2. 髣ｴ髫咎煤��ap Lock�会ｼ夐煤螳夂ｴ｢蠑戊ｮｰ蠖穂ｹ矩龍逧�龍髫呻ｼ亥叉荳､荳ｪ邏｢蠑募ｼ荵矩龍逧�激蝗ｴ�会ｼ御ｸ埼煤螳夊ｮｰ蠖墓悽霄ｫ縲ら岼逧�弍髦ｲ豁｢蜈ｶ莉紋ｺ句苅蝨ｨ髣ｴ髫吩ｸｭ謠貞�譁ｰ隶ｰ蠖包ｼ檎畑莠手ｧ｣蜀ｳ蟷ｻ隸ｻ髣ｮ鬚倥ゆｾ句ｦらｴ｢蠑募ｼ荳ｺ 5 蜥� 10�悟�髣ｴ髫咎煤蜿ｯ閭ｽ髞∽ｽ� (5, 10) 霑吩ｸｪ闌�峩縲�n\n3. 荳ｴ髞ｮ髞�ｼ�ext-Key Lock�会ｼ夊｡碁煤 + 髣ｴ髫咎煤逧�ｻ�粋�碁煤螳壻ｸ荳ｪ邏｢蠑戊ｮｰ蠖募所蜈ｶ蜑埼擇逧�龍髫吶ょ叉髞∝ｮ� [gap, record]縲�nnoDB 蝨ｨ RR 髫皮ｦｻ郤ｧ蛻ｫ荳狗噪鮟倩ｮ､蜉�髞∵婿蠑上ゆｾ句ｦらｴ｢蠑募ｼ荳ｺ 5, 10, 15�御ｸｴ髞ｮ髞∝庄閭ｽ髞∽ｽ� (5, 10] 霑吩ｸｪ蛹ｺ髣ｴ縲�n\n莠後�宙蟇ｹ扈吝ｮ� SQL 逧�煤蛻�梵�喀nSELECT * FROM accounts WHERE balance BETWEEN 1000 AND 5000 FOR UPDATE;\n邏｢蠑募ｼ蛻�ｸ�ｸｺ 500, 2000, 8000縲�n\n蝨ｨ RR 髫皮ｦｻ郤ｧ蛻ｫ荳具ｼ喀n- balance 蝨ｨ 1000-5000 闌�峩蜀�噪邏｢蠑募ｼ蜿ｪ譛� 2000�梧園莉･莨壼ｯｹ balance=2000 霑呵｡悟刈陦碁煤縲�n- 逕ｱ莠� BETWEEN 1000 AND 5000 逧�激蝗ｴ�瑚ｿ倅ｼ壼惠荳､萓ｧ髣ｴ髫吝刈髣ｴ髫咎煤��(500, 1000) 蜥� (2000, 5000)窶披泌ｮ樣刔譏ｯ蟾ｦ髣ｭ蜿ｳ蠑逧�玄髣ｴ縲�n- 扈ｼ蜷郁ｵｷ譚･�壻ｸｴ髞ｮ髞∬ｦ�尠 (500, 2000] + (2000, 5000)�悟叉髦ｲ豁｢蝨ｨ豁､闌�峩蜀�薯蜈･譁ｰ蛟ｼ�亥ｦ� balance=3000 逧�ｮｰ蠖包ｼ会ｼ悟酔譌ｶ髞∽ｽ丞ｷｲ蟄伜惠逧� 2000 霑呵｡後�n\n荳峨∵ｭｻ髞∫嶌蜈ｳ�喀n1. 豁ｻ髞∝ｮ壻ｹ会ｼ壻ｸ､荳ｪ謌門､壻ｸｪ莠句苅莠堤嶌謖∵怏蟇ｹ譁ｹ髴隕∫噪髞�ｼ悟ｽ｢謌仙ｾｪ邇ｯ遲牙ｾ�ｼ梧ｰｸ霑懈裏豕慕ｻｧ扈ｭ謇ｧ陦後�n\n2. MySQL 譽豬区惻蛻ｶ�唔nnoDB 菴ｿ逕ｨ縲檎ｭ牙ｾ�崟縲搾ｼ�ait-for graph�画｣豬区ｭｻ髞√らｻｴ謚､荳荳ｪ莠句苅萓晁ｵ門�邉ｻ蝗ｾ�悟ｦよ棡蝗ｾ荳ｭ蜃ｺ邇ｰ邇ｯ霍ｯ�悟�蟄伜惠豁ｻ髞√�nnoDB 譛我ｸ荳ｪ innodb_deadlock_detect 蜿よ焚謗ｧ蛻ｶ譏ｯ蜷ｦ蠑蜷ｯ譽豬具ｼ磯ｻ倩ｮ､蠑蜷ｯ�峨りｿ伜庄莉･騾夊ｿ� innodb_lock_wait_timeout 隶ｾ鄂ｮ髞∫ｭ牙ｾ�ｶ�慮縲�n\n3. 豁ｻ髞∝､�炊�壽｣豬句芦豁ｻ髞∝錘�栗nnoDB 騾画叫荳荳ｪ縲御ｻ｣莉ｷ譛蟆上咲噪莠句苅霑幄｡悟屓貊夲ｼ磯壼ｸｸ譏ｯ譖ｴ譁ｰ譛蟆題｡檎噪莠句苅�会ｼ悟ｹｶ蜷題ｯ･莠句苅霑泌屓髞呵ｯｯ ERROR 1213 (40001): Deadlock found縲�n\n4. 豁ｻ髞�｢�亟謗ｪ譁ｽ�喀na) 菫晄戟莠句苅蟆ｽ驥冗洒蟆擾ｼ悟㍼蟆第戟髞∵慮髣ｴ縲�nb) 莠句苅荳ｭ逧� SQL 謖牙崋螳夐｡ｺ蠎剰ｮｿ髣ｮ陦ｨ蜥瑚｡鯉ｼ碁∩蜈堺ｺ､蜿牙刈髞√�nc) 蜷育炊隶ｾ隶｡邏｢蠑包ｼ御ｽｿ SQL 閭ｽ邊ｾ遑ｮ髞∝ｮ夐怙隕∫噪陦鯉ｼ碁∩蜈榊､ｧ闌�峩蜉�髞�ｼ亥ｦゆｽｿ逕ｨ隕�尠邏｢蠑募㍼蟆鷹煤闌�峩�峨�nd) 蝨ｨ荳壼苅蜈∬ｮｸ逧�ュ蜀ｵ荳矩剄菴朱囈遖ｻ郤ｧ蛻ｫ荳ｺ READ COMMITTED��C�会ｼ軍C 荳区ｲ｡譛蛾龍髫咎煤�悟､ｧ螟ｧ髯堺ｽ取ｭｻ髞∵ｦら紫縲�ne) 菴ｿ逕ｨ SELECT ... FOR UPDATE NOWAIT 謌� SKIP LOCKED 驕ｿ蜈埼煤遲牙ｾ��",
|
||
|
|
"keywords": [
|
||
|
|
"陦碁煤",
|
||
|
|
"Record Lock",
|
||
|
|
"髣ｴ髫咎煤",
|
||
|
|
"Gap Lock",
|
||
|
|
"荳ｴ髞ｮ髞�",
|
||
|
|
"Next-Key Lock",
|
||
|
|
"豁ｻ髞�",
|
||
|
|
"遲牙ｾ�崟",
|
||
|
|
"innodb_deadlock_detect",
|
||
|
|
"蟷ｻ隸ｻ",
|
||
|
|
"RR髫皮ｦｻ郤ｧ蛻ｫ",
|
||
|
|
"FOR UPDATE"
|
||
|
|
],
|
||
|
|
"scoring_rubric": "貊｡蛻�10蛻�ｼ�1�画ｭ｣遑ｮ蛹ｺ蛻�ｸ臥ｧ埼煤逧�ｮ壻ｹ牙柱蛹ｺ蛻ｫ蠕�3蛻�ｼ�2�画ｭ｣遑ｮ蛻�梵扈吝ｮ� SQL 莠ｧ逕溽噪髞∫ｱｻ蝙句所闌�峩蠕�3蛻�ｼ�3�画ｭ｣遑ｮ隗｣驥頑ｭｻ髞∝ｮ壻ｹ牙柱譽豬区惻蛻ｶ蠕�2蛻�ｼ�4�臥ｻ吝�閾ｳ蟆�3譚｡譛画譜逧�ｭｻ髞�｢�亟謗ｪ譁ｽ蠕�2蛻�る龍髫咎煤闌�峩蛻�梵髞呵ｯｯ謇｣1蛻�ｼ梧悴謠仙所 RC 髫皮ｦｻ郤ｧ蛻ｫ髯堺ｽ取ｭｻ髞∵殴1蛻��",
|
||
|
|
"explanation": "InnoDB 逧�煤譛ｺ蛻ｶ蝗ｴ扈戊ｧ｣蜀ｳ蟷ｻ隸ｻ髣ｮ鬚倩瑚ｮｾ隶｡縲ょ惠 RR 髫皮ｦｻ郤ｧ蛻ｫ荳具ｼ御ｸｴ髞ｮ髞�ｼ�ext-Key Lock�画弍鮟倩ｮ､蜉�髞∵婿蠑擾ｼ悟ｮ�ｻ灘粋莠�｡碁煤蜥碁龍髫咎煤逧�ｼ倡せ�壽里髞∽ｽ丞ｷｲ譛芽ｮｰ蠖暮亟豁｢陲ｫ菫ｮ謾ｹ�悟処髞∽ｽ城龍髫咎亟豁｢譁ｰ隶ｰ蠖墓薯蜈･縲ら炊隗｣髞∫噪闌�峩蟇ｹ莠取ｭｻ髞�｢�亟閾ｳ蜈ｳ驥崎ｦ≫披泌ｾ亥､壽ｭｻ髞∵ｭ｣譏ｯ蝗�荳ｺ莠句苅髞∝ｮ壻ｺ�ｿ�､ｧ逧�激蝗ｴ�亥ｦり激蝗ｴ譟･隸｢譌�邊ｾ遑ｮ邏｢蠑募ｯｼ閾ｴ髞∝�陦ｨ髣ｴ髫呻ｼ会ｼ御ｽｿ荳､荳ｪ莠句苅逧�煤闌�峩莠ｧ逕滉ｺ､蜿峨る剄菴朱囈遖ｻ郤ｧ蛻ｫ蛻ｰ RC 譏ｯ荳遘肴ｿ霑帑ｽ�怏謨育噪遲也払�悟屏荳ｺ RC 荳句宵譛芽｡碁煤豐｡譛蛾龍髫咎煤�御ｽ�ｻ｣莉ｷ譏ｯ蜿ｯ閭ｽ蜃ｺ邇ｰ荳榊庄驥榊､崎ｯｻ縲�",
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||
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"source": null,
|
||
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|
"related": []
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||
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},
|
||
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|
{
|
||
|
|
"id": "sa-005",
|
||
|
|
"type": "short_answer",
|
||
|
|
"difficulty": 4,
|
||
|
|
"tags": [
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||
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|
"redis",
|
||
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|
"sentinel",
|
||
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|
"hybrid-persistence",
|
||
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"slow-query"
|
||
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],
|
||
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|
"question": "隸ｷ蛻�悪蝗樒ｭ比ｻ･荳倶ｸ蛾Κ蛻��螳ｹ�喀n\n荳縲ヽedis 蜩ｨ蜈ｵ��entinel�画ｨ｡蠑擾ｼ喀n1. 蜩ｨ蜈ｵ闃らせ荵矩龍螯ゆｽ暮我ｸｾ leader�滄㊦逕ｨ莉荵育ｮ玲ｳ包ｼ歃n2. 謨�囿霓ｬ遘ｻ��ailover�臥噪螳梧紛豬∫ｨ区弍莉荵茨ｼ歃n\n莠後ヽedis 豺ｷ蜷域戟荵�喧��ybrid Persistence�会ｼ喀n1. RDB 蜥� AOF 蜷��逧�ｼ倡ｼｺ轤ｹ譏ｯ莉荵茨ｼ歃n2. 豺ｷ蜷域戟荵�喧譏ｯ螯ゆｽ慕ｻ灘粋 RDB 蜥� AOF 逧�ｼ蘗OF rewrite 逧��菴捺ｵ∫ｨ区弍莉荵茨ｼ歃n3. 謨�囿諱｢螟肴慮�梧ｷｷ蜷域戟荵�喧逧�△螟肴ｵ∫ｨ区弍諤取�ｷ逧�ｼ歃n\n荳峨ヽedis 蜀�ｭ倅ｼ伜喧�喀n1. 螯ゆｽ墓賜譟･ Redis 荳ｭ逧�､ｧ key 髣ｮ鬚假ｼ溷､ｧ key 譛牙頭莠帛些螳ｳ�歃n2. Redis 逧��蟄俶ｷ俶ｱｰ遲也払譛牙頭莠幢ｼ溷推閾ｪ騾ら畑莉荵亥惻譎ｯ��",
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"answer": "荳縲ヽedis 蜩ｨ蜈ｵ�喀n1. Leader 騾我ｸｾ驥�畑 Raft 邂玲ｳ包ｼ喀n- 豈丈ｸｪ Sentinel 闃らせ豈冗ｧ貞髄蜈ｶ莉冶鰍轤ｹ蜿鷹� PING縲�n- 蠖捺汾荳ｪ Sentinel 蜿醍鴫 master 蝨ｨ down-after-milliseconds 譌ｶ髣ｴ蜀�裏蜩榊ｺ費ｼ梧��ｮｰ荳ｺ SDOWN�井ｸｻ隗ゆｸ狗ｺｿ�峨�n- 蠖� quorum�域ｳ募ｮ壻ｺｺ謨ｰ�我ｸｪ Sentinel 驛ｽ譬�ｮｰ荳ｺ SDOWN 譌ｶ�稽aster 陲ｫ譬�ｮｰ荳ｺ ODOWN�亥ｮ｢隗ゆｸ狗ｺｿ�峨�n- Sentinel 蜿題ｵｷ leader 騾我ｸｾ�壽ｯ丈ｸｪ Sentinel 蜷大�莉� Sentinel 蜿鷹� Sentinel is-master-down-by-addr 蜻ｽ莉､隸ｷ豎よ兜逾ｨ縲�n- 豈丈ｸｪ Sentinel 蝨ｨ荳荳ｪ驟咲ｽｮ郤ｪ蜈�ｼ�poch�我ｸｭ蜿ｪ閭ｽ謚穂ｸ逾ｨ�悟�蛻ｰ蜈亥ｾ励�n- 闔ｷ蠕� quorum+1 逾ｨ�亥叉雜�ｿ�濠謨ｰ�臥噪 Sentinel 謌蝉ｸｺ leader�梧鴬陦梧腐髫懆ｽｬ遘ｻ縲�n\n2. 謨�囿霓ｬ遘ｻ豬∫ｨ具ｼ喀na) Leader Sentinel 莉� slave 蛻苓｡ｨ荳ｭ遲幃画眠 master�喀n - 謗帝勁蟾ｲ荳狗ｺｿ逧�∵妙郤ｿ譌ｶ髣ｴ霑�柄逧�ｼ郁ｶ�ｿ� down-after-milliseconds * 10�峨《lave-priority=0 逧�鰍轤ｹ縲�n - 莨伜�騾画叫 offset 譛螟ｧ�域焚謐ｮ譛譁ｰ�臥噪 slave縲�nb) 蟇ｹ騾我ｸｭ逧� slave 謇ｧ陦� SLAVEOF NO ONE�御ｽｿ蜈ｶ謌蝉ｸｺ master縲�nc) 蜷大�莉� slave 蜿鷹� SLAVEOF <new_master_ip> <port>�御ｽｿ螳�ｻｬ螟榊宛譁ｰ master縲�nd) 譖ｴ譁ｰ sentinel.conf 荳ｭ逧� master 蝨ｰ蝮�碁夂衍螳｢謌ｷ遶ｯ譁ｰ逧� master縲�n\n莠後ヽedis 豺ｷ蜷域戟荵�喧�喀n1. RDB 莨倡ｼｺ轤ｹ�喀n莨倡せ�壽枚莉ｶ邏ｧ蜃托ｼ梧△螟埼溷ｺｦ蠢ｫ�碁ょ粋螟�ｻｽ蜥檎∪髫ｾ諱｢螟阪�n郛ｺ轤ｹ�壻ｸ､谺｡蠢ｫ辣ｧ荵矩龍逧�焚謐ｮ蜿ｯ閭ｽ荳｢螟ｱ�亥叙蜀ｳ莠� RDB 髣ｴ髫費ｼ会ｼ嫻ork 蟄占ｿ帷ｨ区慮蜿ｯ閭ｽ蜊�逕ｨ霎�､壼�蟄倥�n\nAOF 莨倡ｼｺ轤ｹ�喀n莨倡せ�壽焚謐ｮ螳牙�諤ｧ鬮假ｼ�verysec 遲也払譛螟壻ｸ｢1遘呈焚謐ｮ�会ｼ悟庄隸ｻ諤ｧ蠑ｺ縲�n郛ｺ轤ｹ�壽枚莉ｶ菴鍋ｧｯ螟ｧ�梧△螟埼溷ｺｦ諷｢�磯怙驥肴叛謇譛牙�蜻ｽ莉､�峨�n\n2. 豺ｷ蜷域戟荵�喧��edis 4.0+�径of-use-rdb-preamble yes�会ｼ喀n蝨ｨ AOF rewrite 譌ｶ�御ｸ榊�譏ｯ郤ｯ蜻ｽ莉､驥肴叛�瑚梧弍�喀na) 蜈井ｻ･ RDB 譬ｼ蠑丞ｰ�ｽ灘燕蜈ｨ驥乗焚謐ｮ蜀吝� AOF 譁�ｻｶ螟ｴ驛ｨ��DB preamble�峨�nb) rewrite 譛滄龍逧�｢樣㍼蜀吝多莉､霑ｽ蜉�蝨ｨ RDB 謨ｰ謐ｮ荵句錘��OF 譬ｼ蠑擾ｼ峨�nc) 譛扈� AOF 譁�ｻｶ = RDB 譬ｼ蠑冗噪蜈ｨ驥乗焚謐ｮ + AOF 譬ｼ蠑冗噪蠅樣㍼謨ｰ謐ｮ縲�n\nAOF rewrite 豬∫ｨ具ｼ喀n1) Redis 蛻帛ｻｺ蟄占ｿ帷ｨ区鴬陦� rewrite�育ｱｻ莨ｼ RDB 逧� fork�峨�n2) 蟄占ｿ帷ｨ矩″蜴��蟄俶焚謐ｮ�檎函謌先眠逧� AOF 譁�ｻｶ�域ｷｷ蜷域ｨ｡蠑丈ｸ句�蜀� RDB 譬ｼ蠑丞�驥乗焚謐ｮ�悟�蜀吝｢樣㍼蜻ｽ莉､�峨�n3) rewrite 譛滄龍逧��蜻ｽ莉､蜷梧慮蜀吝�譌ｧ AOF 譁�ｻｶ逧�ｼ灘�蛹ｺ蜥梧眠 AOF 譁�ｻｶ蟆ｾ驛ｨ縲�n4) 蟄占ｿ帷ｨ句ｮ梧�蜷趣ｼ御ｸｻ霑帷ｨ句ｰ�ｼ灘�蛹ｺ荳ｭ逧�｢樣㍼謨ｰ謐ｮ霑ｽ蜉�蛻ｰ譁ｰ AOF 譁�ｻｶ縲�n5) 蜴溷ｭ先崛謐｢譌ｧ AOF 譁�ｻｶ荳ｺ譁ｰ AOF 譁�ｻｶ縲�n\n3. 謨�囿諱｢螟肴ｵ∫ｨ具ｼ喀na) 譽譟･譏ｯ蜷ｦ蠑蜷ｯ豺ｷ蜷域戟荵�喧��of-use-rdb-preamble�峨�nb) 螯よ棡蠑蜷ｯ�壼�莉･ RDB 譁ｹ蠑乗△螟榊�驥乗焚謐ｮ�亥ｿｫ騾滂ｼ会ｼ檎┯蜷朱㍾謾ｾ RDB 荵句錘逧� AOF 蜻ｽ莉､諱｢螟榊｢樣㍼謨ｰ謐ｮ縲�nc) 螯よ棡譛ｪ蠑蜷ｯ郤ｯ AOF 讓｡蠑擾ｼ夐㍾謾ｾ謇譛� AOF 蜻ｽ莉､�郁ｾ���峨�nd) 螯よ棡蜿ｪ譛� RDB�夂峩謗･蜉�霓ｽ RDB 譁�ｻｶ�域怙蠢ｫ�御ｽ�庄閭ｽ荳｢螟ｱ譛霑第焚謐ｮ�峨�ne) 諱｢螟堺ｼ伜�郤ｧ�哂OF > RDB�亥ｦよ棡荳､閠��蟄伜惠�峨�n\n荳峨ヽedis 蜀�ｭ倅ｼ伜喧�喀n1. 螟ｧ key 謗呈衍譁ｹ豕包ｼ喀na) redis-cli --bigkeys�壽沖謠城寔鄒､�梧伽蜃ｺ豈丈ｸｪ謨ｰ謐ｮ邀ｻ蝙倶ｸｭ譛螟ｧ逧� key縲�nb) redis-cli --memkeys�壽潔蜀�ｭ倅ｽｿ逕ｨ驥乗賜蠎上�nc) SCAN + MEMORY USAGE�夐″蜴�園譛� key�檎畑 MEMORY USAGE 蜻ｽ莉､騾蝉ｸｪ譽譟･縲�nd) 菴ｿ逕ｨ RDB 蟾･蜈ｷ�亥ｦ� rdb�臥ｦｻ郤ｿ蛻�梵 dump.rdb 譁�ｻｶ縲�ne) 蝨ｨ Redis 6.0+ 菴ｿ逕ｨ OBJECT HELP 蜥� DEBUG 譽譟･縲�n\n螟ｧ key 蜊ｱ螳ｳ�喀na) 謫堺ｽ懷ｻｶ霑滄ｫ假ｼ咼EL 螟ｧ key 蜿ｯ閭ｽ髦ｻ蝪樔ｸｻ郤ｿ遞具ｼ�edis 4.0+ 蟾ｲ謾ｹ荳ｺ蠑よｭ･蛻�髯､�峨�nb) 鄂醍ｻ懷ｸｦ螳ｽ蜊�逕ｨ�夊ｯｻ蜀吝､ｧ key 豸郁怜､ｧ驥冗ｽ醍ｻ懆ｵ�ｺ舌�nc) 蜀�ｭ倅ｸ榊插�壼惠 Cluster 荳ｭ蜿ｯ閭ｽ蟇ｼ閾ｴ譟蝉ｸｪ闃らせ蜀�ｭ倩ｿ懷､ｧ莠主�莉冶鰍轤ｹ縲�nd) 謖∽ｹ�喧蜿怜ｽｱ蜩搾ｼ喃ork 譌ｶ螟ｧ key 蠅槫刈蜀呎慮螟榊宛��OW�臥噪蜀�ｭ伜ｼ髞縲�ne) 霑�悄蛻�髯､蠑髞�壼､ｧ key 霑�悄譌ｶ蜿ｯ閭ｽ騾�謌千洒證ら噪諤ｧ閭ｽ謚門勘縲�n\n2. 蜀�ｭ俶ｷ俶ｱｰ遲也払��8遘搾ｼ会ｼ喀na) noeviction�磯ｻ倩ｮ､�会ｼ壼�蟄俶ｻ｡譌ｶ諡堤ｻ晏�蜈･�瑚ｿ泌屓髞呵ｯｯ縲るょ粋荳榊�隶ｸ謨ｰ謐ｮ荳｢螟ｱ逧�惻譎ｯ縲�nb) allkeys-lru�壽園譛� key 荳ｭ豺俶ｱｰ譛霑第怙蟆台ｽｿ逕ｨ逧�るょ粋辜ｭ轤ｹ謨ｰ謐ｮ譏取仞逧�夂畑蝨ｺ譎ｯ縲�nc) volatile-lru�壼宵蝨ｨ隶ｾ鄂ｮ莠�ｿ�悄譌ｶ髣ｴ逧� key 荳ｭ豺俶ｱｰ LRU�
|
||
|
|
"keywords": [
|
||
|
|
"Sentinel",
|
||
|
|
"Raft",
|
||
|
|
"leader騾我ｸｾ",
|
||
|
|
"SDOWN",
|
||
|
|
"ODOWN",
|
||
|
|
"quorum",
|
||
|
|
"failover",
|
||
|
|
"豺ｷ蜷域戟荵�喧",
|
||
|
|
"RDB",
|
||
|
|
"AOF",
|
||
|
|
"rewrite",
|
||
|
|
"fork",
|
||
|
|
"aof-use-rdb-preamble",
|
||
|
|
"螟ｧkey",
|
||
|
|
"bigkeys",
|
||
|
|
"MEMORY USAGE",
|
||
|
|
"noeviction",
|
||
|
|
"allkeys-lru",
|
||
|
|
"allkeys-lfu",
|
||
|
|
"volatile-ttl"
|
||
|
|
],
|
||
|
|
"scoring_rubric": "貊｡蛻�15蛻�ｼ壼鐙蜈ｵ驛ｨ蛻�5蛻�ｼ�eader騾我ｸｾ邂玲ｳ�2蛻� + 謨�囿霓ｬ遘ｻ豬∫ｨ�3蛻�ｼ会ｼ帶ｷｷ蜷域戟荵�喧驛ｨ蛻�5蛻�ｼ�DB/AOF莨倡ｼｺ轤ｹ1蛻� + 豺ｷ蜷亥次逅�2蛻� + 諱｢螟肴ｵ∫ｨ�2蛻�ｼ会ｼ帛�蟄倅ｼ伜喧驛ｨ蛻�5蛻�ｼ亥､ｧkey謗呈衍2蛻� + 蜊ｱ螳ｳ1蛻� + 豺俶ｱｰ遲也払2蛻�ｼ峨よｯ丈ｸｪ驛ｨ蛻�ｭ泌�譬ｸ蠢�ｦ∫せ蜊ｳ蜿ｯ蠕怜��檎ｻ�鰍荳榊ｮ梧紛驟梧ュ謇｣蛻��",
|
||
|
|
"explanation": "Redis 逧�ｫ伜庄逕ｨ譁ｹ譯育ｻ丞紙莠�ｸｻ莉寂�蜩ｨ蜈ｵ竊辰luster 逧�ｼ碑ｿ帙ょ鐙蜈ｵ騾夊ｿ� Raft 邂玲ｳ暮我ｸｾ leader 譚･蜊剰ｰ�腐髫懆ｽｬ遘ｻ�碁∩蜈堺ｺ�я陬る琉鬚倥よｷｷ蜷域戟荵�喧譏ｯ Redis 4.0 逧�㍾隕∵隼霑幢ｼ悟ｮ�ｻ灘粋莠� RDB 逧�ｿｫ騾滓△螟榊柱 AOF 逧�焚謐ｮ螳牙�諤ｧ�碁夊ｿ�軍DB螟ｴ + AOF蟆ｾ縲咲噪譁�ｻｶ譬ｼ蠑擾ｼ御ｽｿ謨�囿諱｢螟肴里蠢ｫ蜿亥�縲ょ�蟄倅ｼ伜喧譁ｹ髱｢�悟､ｧ key 譏ｯ Redis 霑千ｻｴ荳ｭ譛蟶ｸ隗∫噪諤ｧ閭ｽ譚謇倶ｹ倶ｸ�瑚悟�蟄俶ｷ俶ｱｰ遲也払逧�画叫髴隕∵�ｹ謐ｮ荳壼苅蝨ｺ譎ｯ逧�焚謐ｮ驥崎ｦ∵ｧ縲∬ｮｿ髣ｮ讓｡蠑丞柱譌ｶ謨域ｧ譚･扈ｼ蜷亥愛譁ｭ縲りｿ吩ｸ蛾Κ蛻��蜷梧桷謌蝉ｺ� Redis 逕滉ｺｧ邇ｯ蠅�ｿ千ｻｴ逧��ｸ蠢�衍隸�ｽ鍋ｳｻ縲�",
|
||
|
|
"source": null,
|
||
|
|
"related": []
|
||
|
|
}
|
||
|
|
]
|
||
|
|
}
|