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鐩稿叧鍘嗗彶鏂囩珷锛?/strong>闃呰鏈枃涔嬪墠锛屾偍鍙兘闇€瑕佸厛鐪嬩笅涔嬪墠鐨勭郴鍒?/strong>馃憞锛?/strong>
鎮熺氦锛氬笀鍌咃紝鏈€杩戝緢鏄儲浜哄憪锛?/span>
甯堝倕锛氳皝娆鸿礋鎴戝緬鍎夸簡锛?/span>
鎮熺氦锛氬搸锛屾渶杩戞暟鎹簱鍘嬪姏澶э紝瀵艰嚧寰掑効鍘嬪姏涔熷北澶с€?/span>
甯堝倕锛氭暟鎹簱鍘嬪姏澶э紝缂撳瓨鏉ヨВ鍐筹紝寰掑効锛岃刀绱т笂缂撳瓨鍛愩€傚氨濡傚悓鐜板湪杩欐槸鎵€鏈夌殑鈥?/span>濡栨€?/span>鈥濋兘鏄綘鍦ㄦ墦锛岃刀绱ц鈥?/span>鍏垝鈥濇嫤涓€閮ㄥ垎銆傝繖鏍蜂綘鐨勫帇鍔涘氨灏忎簡銆?/span>
鎮熺氦锛氱紦瀛樿繖鏄粈涔堜笢涓滐紵
甯堝倕锛氫负甯堜粖澶╁氨鏉ョ粰浣犳櫘鍙婁笅Memcached缂撳瓨銆?/span>
BTW锛氱紦瀛樼紦瀛橈紝璁╀綘鐨勫ご涓嶅啀鐤笺€?/span>
涓€銆佷綍涓篗emcached缂撳瓨
銆岀櫨搴︾櫨绉戙€嶏細
Memcached鏄竴涓?/span>鑷敱寮€婧?/span>鐨勶紝楂樻€ц兘锛?/span>鍒嗗竷寮忓唴瀛?/span>瀵硅薄缂撳瓨绯荤粺銆?/span>
Memcached鏄互LiveJournal鏃椾笅Danga Interactive鍏徃鐨凚rad Fitzpatric涓洪寮€鍙戠殑涓€娆捐蒋浠躲€傜幇鍦ㄥ凡鎴愪负mixi銆乭atena銆丗acebook銆乂ox銆丩iveJournal绛変紬澶氭湇鍔′腑鎻愰珮Web搴旂敤鎵╁睍鎬х殑閲嶈鍥犵礌銆?/span>
Memcached鏄竴绉嶅熀浜庡唴瀛樼殑key-value瀛樺偍锛岀敤鏉ュ瓨鍌ㄥ皬鍧楃殑浠绘剰鏁版嵁锛堝瓧绗︿覆銆佸璞★級銆傝繖浜涙暟鎹彲浠ユ槸鏁版嵁搴撹皟鐢ㄣ€丄PI璋冪敤鎴栬€呮槸椤甸潰娓叉煋鐨勭粨鏋溿€?/span>
Memcached绠€娲佽€屽己澶с€傚畠鐨勭畝娲佽璁′究浜庡揩閫熷紑鍙戯紝鍑忚交寮€鍙戦毦搴︼紝瑙ｅ喅浜嗗ぇ鏁版嵁閲忕紦瀛樼殑寰堝闂銆傚畠鐨凙PI鍏煎澶ч儴鍒嗘祦琛岀殑寮€鍙戣瑷€銆?/span>
涓€鑸殑浣跨敤鐩殑鏄紝閫氳繃缂撳瓨鏁版嵁搴撴煡璇㈢粨鏋滐紝鍑忓皯鏁版嵁搴撹闂鏁帮紝浠ユ彁楂樺姩鎬乄eb搴旂敤鐨勯€熷害銆佹彁楂樺彲鎵╁睍鎬с€?/span>
銆屽娣辨偀閫忋€?/span>
鎮熺氦锛氳繖淇℃伅閲忎笉灏戝憪锛屽笀鍌呮⒊鐞嗕笅鍛椼€?/span>
甯堝倕锛氬ソ鍚э紝涓哄笀鐢ㄤ竴鍙ヨ瘽姒傚喌涓嬨€?/span>
BTW锛歁emcached鏄竴涓熀浜嶬-V鍐呭瓨瀛樺偍銆佸紑婧愩€佸厤璐广€侀珮鎬ц兘鐨勫垎甯冨紡缂撳瓨绯荤粺銆?/span>
鎮熺氦锛氬笀鍌咃紝寰掑効鐞嗚В浜嗭紝
Memcached锛圡emoryCached锛?/span>
灏辨槸浣跨敤K-V鐨勬柟寮忚繘琛屽唴瀛樺偍瀛橈紝鎬ц兘姣旇緝楂橈紝鏀寔鍒嗗竷寮忓鐞嗐€傜敱浜庡皢澶ч儴鍒嗙殑璇锋眰鏁版嵁閮界敱缂撳瓨杩涜澶勭悊杩斿洖锛屾墍浠ユ暟鎹簱鐨勫帇鍔涘氨鍑忓皯浜嗐€?/span>
甯堝倕锛氫负甯堣缁欎綘32涓禐銆?/span>
浜屻€丮emcached鐨勪竴浜涘熀鏈壒鎬?/span>
涓轰簡瀵逛簬Memcached鏈変竴涓洿濂界殑璁ょ煡锛屾垜浠渶瑕佸浜嶮emcached鐨勫熀鏈壒鎬ф湁涓€涓畝鍗曠殑鐞嗚В锛岃繖鏍蜂竴鏂归潰鏈夊姪浜庡浜嶮emcached鐨勪娇鐢紝鍙﹀涓€鏂归潰涔熸湁鍔╀簬鎶€鏈殑閫夊瀷銆?/span>
锛?锛?Memcached鏄娇鐢?/span>KV鍐呭瓨绠＄悊锛?/span>key鐨勯暱搴︽渶澶?50瀛楃锛?/span>value瀛樺偍鏈€澶т负1M锛屼笉鏀寔澶嶆潅鐨勬暟鎹被鍨嬶紙鍝堝笇銆佸垪琛ㄣ€侀泦鍚堢瓑锛夈€?/span>
锛?锛塎emcached涓嶆敮鎸佹寔涔呭寲锛堜笉鑳藉瓨鍦ㄧ鐩橈紝鍙兘瀛樺偍鍦ㄥ唴瀛樹腑锛夈€?/span>
锛?锛塎emcached鏀寔key杩囨湡锛?/span>杩囨湡鏃堕棿鏈€澶у彲浠ヨ揪鍒?0澶?/span>锛?/span>銆?/span>
锛?锛塎emcached浣跨敤闈為樆濉濱O澶嶇敤缃戠粶妯″瀷锛屼娇鐢ㄧ洃鍚嚎绋?宸ヤ綔绾跨▼鐨?/span>澶氱嚎绋嬫ā鍨?/span>銆?/span>
锛?锛塎emcached鍩轰簬c/s鏋舵瀯锛屽崗璁畝鍗曘€?/span>
鈥?/span>
涓夈€佹偀绾?00闂?/span>
3.1 key鍜寁alue鏄惁鏈夐檺鍒?/span>
Memcached鏄娇鐢?/span>KV鍐呭瓨绠＄悊锛?/span>key鐨勯暱搴︽渶澶?50瀛楃锛?/span>value瀛樺偍鏈€澶т负1M銆?/span>
3.2 memcached鏄敤浠€涔堟妧鏈疄鐜発ey杩囨湡鐨勶紵
鎳掓窐姹?/span>(lazy expiration)銆?/span>
Memcached 鍐呴儴涓嶄細鐩戣璁板綍鏄惁杩囨湡锛岃€屾槸鍦?/span>get鏃舵煡鐪嬭褰曠殑鏃堕棿鎴筹紝妫€鏌?/span>璁板綍鏄惁杩囨湡銆傝繖绉嶆妧鏈绉颁负lazy锛堟儼鎬э級expiration銆傚洜姝わ紝Memcached涓嶄細鍦ㄨ繃鏈熺洃瑙嗕笂鑰楄垂CPU鏃堕棿銆?/span>
3.3 鍒犻櫎鏈哄埗(缂撳瓨绛栫暐)
Memcached鐨勭紦瀛樼瓥鐣ユ槸LRU锛堟渶杩戞渶灏戜娇鐢級鍔犱笂鍒版湡澶辨晥绛栫暐銆傚綋浣犲湪memcached鍐呭瓨鍌ㄦ暟鎹」鏃讹紝浣犳湁鍙兘浼氭寚瀹氬畠鍦ㄧ紦瀛樼殑澶辨晥鏃堕棿銆傚綋memcached鏈嶅姟鍣ㄧ敤瀹屽垎閰嶇殑鍐呮椂锛屽け鏁堢殑鏁版嵁琚鍏堟浛鎹紝鐒跺悗涔熸槸鏈€杩戞湭浣跨敤鐨勬暟鎹€傚湪LRU涓紝memcached浣跨敤鐨勬槸涓€绉峀azyExpiration绛栫暐锛岃嚜宸变笉浼氱洃鎺у瓨鍏ョ殑key/vlue瀵规槸鍚﹁繃鏈燂紝鑰屾槸鍦ㄨ幏鍙杒ey鍊兼椂鏌ョ湅璁板綍鐨勬椂闂存埑锛屾鏌ey/value瀵圭┖闂存槸鍚﹁繃鏈燂紝杩欐牱鍙噺杞绘湇鍔″櫒鐨勮礋杞姐€?/span>
BTW锛歁emcached鐨勭紦瀛樼瓥鐣ュ氨鏄疞RU+鍒版湡澶辨晥锛涗娇鐢ㄦ噿娣樻卑锛屽綋鑾峰彇key鐨勬椂鍊欒Е鍙戙€?/span>
瀵逛簬Memcached鐨凩RU鍜屾垜浠箣鍓嶈鐨凩RU鏈変綍鍖哄埆鍛愶紵
3.4 瀛樺偍鏂瑰紡
鍐呭瓨瀛樺偍鏂瑰紡, 闈炴寔涔呮€у瓨鍌?/span>銆傛墍鏈夋暟鎹兘淇濆瓨鍦ㄥ唴瀛樹腑锛屽瓨鍙栨暟鎹瘮纭洏蹇紝褰撳唴瀛樻弧鍚庯紝閫氳繃LRU绠楁硶鑷姩鍒犻櫎涓嶄娇鐢ㄧ殑缂撳瓨锛屼絾娌℃湁鑰冭檻鏁版嵁鐨勫鐏鹃棶棰橈紝閲嶅惎鏈嶅姟锛屾墍鏈夋暟鎹細涓㈠け銆?/span>
3.5 Memcached鍒嗗竷寮忔槸濡備綍瀹炵幇鐨?/span>
memcached鏈韩鏄竴涓潪甯歌交閲忕骇鐨勬湇鍔★紝涓嶆敮鎸佷富杈呭悓姝ワ紝涔熸病鏈夐泦缇ょ殑姒傚康銆備絾涓轰簡鍙墿灞曟€э紝memcached鏈嶅姟鍣ㄧ鍜?memcached 瀹㈡埛绔粨鍚堣捣鏉ュ彲浠ユ瀯鎴愪竴涓垎甯冨紡绯荤粺銆?/span>
鍦╩emcached鍒嗗竷寮忕郴缁熶腑锛屽悇涓?memcached 鑺傜偣涔嬮棿鏃犻』閫氫俊锛屾墍浠ユ墿灞曟€ч潪甯稿ソ銆?/span>
->Memcached鐨勫垎甯冨紡鐗圭偣锛?/span>
鈥?>: 鏈嶅姟鍣ㄧ涓嶅叧蹇冨垎甯冨紡锛氭湇鍔＄鐨勫悇涓狹emcached閮芥槸鐙珛閮ㄧ讲锛屼箣闂翠笉鐩镐簰閫氫俊锛岃繖鏍锋湇鍔＄閮ㄧ讲澶氫釜Memcached灏卞緢绠€鍗曘€?/span>
3.6 Memcached鐨勯泦缇ゆ柟妗堟湁鍝簺锛?/span>
鍥犱负memcached鐨勬湇鍔″櫒骞朵笉鏀寔闆嗙兢锛屾墍浠ユ湁涓ょ鏂规鏀寔
锛?锛変唬鐞嗙鏀寔闆嗙兢锛堟€ц兘浼氭湁鎵€鎹熻€楋紝澶ф20%锛夛紱
锛?锛変竴绉嶆槸瀹㈡埛绔敮鎸侀泦缇ゃ€?/span>
BTW锛氭帹鑽愪娇鐢ㄥ鎴风銆傜敱涓婇潰鍙煡涓€鑸殑搴旂敤涓璵emcached鏈嶅姟绔泦缇や笉鐢ㄥ仛澶宸ヤ綔锛岄儴缃蹭竴鍫唌emcached鏈嶅姟鍣ㄥ氨鍙互浜嗐€?/span>
Memcached闆嗙兢鍜寃eb鏈嶅姟闆嗙兢鏄笉涓€鏍风殑锛?鎵€鏈塎emcached鐨勬暟鎹€诲拰鎵嶆槸鏁版嵁搴撶殑鏁版嵁銆傛瘡鍙癕emcached閮芥槸閮ㄥ垎鏁版嵁銆傦紙锛堜竴鍙癿emcached鐨勬暟鎹紝灏辨槸涓€閮ㄥ垎mysql鏁版嵁搴撶殑鏁版嵁锛夛級
3.7 Memcached纰板埌绉掓潃涓氬姟鎬庝箞鐜╋紵
濡傛灉纰板埌鐢靛晢绉掓潃绛夐珮骞跺彂鐨勪笟鍔★紝涓€瀹氳浜嬪厛棰勭儹锛屾垨鑰呭叾瀹冩€濇兂瀹炵幇锛屼緥濡傦細绉版潃鍙槸鑾峰彇璧勬牸锛岃€屼笉鏄灛闂寸鏉€鍒版墜鍟嗗搧銆?/span>
閭ｄ箞浠€涔堟槸鑾峰彇璧勬牸锛熷氨鏄湪鏁版嵁搴撲腑锛屾妸0鏍囨垚1.灏辨湁璧勬牸鍟︺€傚啀鎱㈡參鐨勫幓棰嗗彇鍟嗗搧璁㈠崟銆傚洜涓虹鏉€杩囩▼澶暱浼氬崰鐢ㄦ湇鍔″櫒璧勬簮銆?/span>
BTW锛氭牳蹇冨氨鏄簨鍏堥鐑€佽幏鍙栬祫鏍?/span>
杩樿寰?2306鐨勭伀杞︾エ浣欑エ鏌ヨ鍢涳紝涓€寮€濮嬬殑鏃跺€欙紝璁捐鎴愭椂鏃舵洿鏂颁綑绁ㄦ暟閲忥紝鍚庢潵璋冩暣涓烘湁绁ㄦ棤绁紝瀵逛簬鐢ㄦ埛鑰岃█锛屼笉鍏冲績杩樺墿涓嬪灏戠エ锛屽叧蹇冪殑鏄湁娌℃湁绁ㄣ€傛姠绁ㄦ垚鍔熶箣鍚庯紝灏辫幏鍙栦簡绁ㄧ殑璧勬牸锛岃嚦浜庝笅鍗曟敮浠樺湪45鍒嗛挓鍐呮搷浣滃畬鎴愬嵆鍙紝鍚﹀垯绁ㄨ閲婃斁鍑烘潵銆?/span>
3.8 Memcached鏈嶅姟鍦ㄤ笟鍔″簲鐢ㄥ満鏅腑鐨勫伐浣滄祦绋?/span>
锛?锛夋煡璇細褰搘eb绋嬪簭闇€瑕佽闂悗绔暟鎹簱鑾峰彇鏁版嵁鏃朵細浼樺厛璁块棶Memcached鍐呭瓨缂撳瓨锛屽鏋滅紦瀛樹腑鏈夋暟鎹氨鐩存帴鑾峰彇杩斿洖鍓嶇鏈嶅姟鍙婄敤鎴凤紝濡傛灉娌℃湁鏁版嵁锛堟病鏈夊懡涓級锛屽湪鐢辩▼搴忚姹傚悗绔殑鏁版嵁搴撴湇鍔″櫒锛岃幏鍙栧埌瀵瑰簲鐨勬暟鎹悗锛岄櫎浜嗚繑鍥炵粰鍓嶇鏈嶅姟鍙婄敤鎴锋暟鎹锛岃繕浼氭妸鏁版嵁鏀惧埌Memcached鍐呭瓨涓繘琛岀紦瀛橈紝绛夊緟涓嬫璇锋眰琚闂紝Memcache鍐呭瓨濮嬬粓鏄暟鎹簱鐨勬尅绠墝锛屼粠鑰屽ぇ澶х殑鍑忚交鏁版嵁搴撶殑璁块棶鍘嬪姏锛屾彁楂樻暣涓綉绔欐灦鏋勭殑鍝嶅簲閫熷害锛屾彁鍗囦簡鐢ㄦ埛浣撻獙銆?/span>
锛?锛夋洿鏂帮細褰撶▼搴忔洿鏂帮紝淇敼鎴栧垹闄ゆ暟鎹簱涓凡鏈夌殑鏁版嵁鏃讹紝浼氬悓鏃跺彂閫佽姹傞€氱煡Memcached宸茬粡缂撳瓨鐨勫悓涓€涓狪D鍐呭鐨勬棫鏁版嵁澶辨晥锛屼粠鑰屼繚璇丮emcache涓暟鎹拰鏁版嵁搴撲腑鐨勬暟鎹竴鑷淬€?/span>
3.9 Memcached涓轰粈涔堟€ц兘楂橈紵
memcached 鎬ц兘楂樼殑鍘熷洜涓昏鍦ㄤ簬 libevent浜嬩欢鏈哄埗銆?/span>澶氱嚎绋?/span>銆佸叏鍐呭瓨鎿嶄綔銆佹ā鍨嬬畝鍗曪紙鏃堕棿澶嶆潅搴?O(1)锛屽敖閲忛伩鍏嶉攣鏈哄埗锛夈€?/span>
memcached 鎵€鏈夌殑鎿嶄綔閮芥槸 O(1) 锛圠RU绠楁硶锛?/span>锛宻et/get 鎿嶄綔涓嶅簲璇ュ嚭鐜版粸鍚庯紝涓€涓姹傛甯告儏鍐典笅涓嶅埌 1ms 灏辫兘杩斿洖锛屽鏋滈亣鍒?Hang锛岄偅鍙兘鏄繛鎺ユ暟杩囧銆佷骇鐢熶簡 swap銆侀亣鍒颁簡缃戠粶闂銆?/span>
閰嶇疆鐩稿杈冮珮鐨勬湇鍔″櫒锛屾瘡绉掑彲浠ュ鐞?200,000+ 鐨勮姹傦紝鍗充娇鍦ㄥ緢鎱㈢殑鏈哄櫒涓婏紝姣忕澶勭悊鍑犵櫨娆′篃姣棤鍘嬪姏銆?/span>
3.10 memcache涓轰粈涔堣兘淇濊瘉杩愯鎬ц兘
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3.11 鏄惁鏀寔澶嶆潅鐨勬搷浣?/span>
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3.12 寰堝皯浼氬嚭鐜板唴瀛樼鐗囷紵
娴垂瀛樺偍绌洪棿锛屾潵鍑忓皯鍐呭瓨纰庣墖銆?/span>
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锛?锛?/span>Memcached锛歁emcached鏄竴涓熀浜嶬-V鍐呭瓨瀛樺偍銆佸紑婧愩€佸厤璐广€侀珮鎬ц兘鐨勫垎甯冨紡缂撳瓨绯荤粺銆傦紙鍑犱釜鍏抽敭璇嶈璁颁綇锛氬唴瀛橈紝KV,楂樻€ц兘銆佸垎甯冨紡锛?/span>
锛?锛夊唴瀛樺偍瀛橈細鍏ㄩ儴鏁版嵁瀛樻斁浜庡唴瀛樹腑锛屾棤鎸佷箙鎬у瓨鍌ㄧ殑璁捐锛岄噸鍚湇鍔″櫒锛屽唴瀛橀噷鐨勬暟鎹細涓㈠け銆傦紙瀛樻斁鍐呭瓨銆佷笉鏀寔鎸佷箙鍖栵級銆?/span>
锛?锛塊V鍌ㄥ瓨锛氫娇鐢╧ey-value鐨勬柟寮忓偍瀛樻暟鎹紝key鐨勬渶澶ч暱搴︽槸250涓瓧绗︼紝value鍌ㄥ瓨鏈€澶у€兼槸1M銆?/span>
锛?锛夐珮鎬ц兘缂樼敱锛?/span>libevent浜嬩欢鏈哄埗銆?/span>澶氱嚎绋?/span>銆佸叏鍐呭瓨鎿嶄綔銆佹ā鍨嬬畝鍗曘€佹墍鏈夋搷浣滈兘鏄疧(1)銆?/span>
锛?锛夊垎甯冨紡瀹炵幇锛氭湇鍔＄姝ｅ父閮ㄧ讲锛屽鏈嶇瀹炵幇銆?/span>
锛?锛夌紦瀛樼瓥鐣ワ細LRU+鍒版湡澶辨晥+鎳掓窐姹般€傦紙涓嶄細鐩戞帶瀛樺叆鐨刱ey/vlue瀵规槸鍚﹁繃鏈燂紝鑰屾槸鍦ㄨ幏鍙杒ey鍊兼椂鏌ョ湅璁板綍鐨勬椂闂存埑锛屽綋鍐呭瓨涓紦瀛樼殑鏁版嵁瀹归噺杈惧埌鍚姩鏃惰瀹氱殑鍐呭瓨鍊兼椂锛屽氨鑷姩浣跨敤LRU绠楁硶鍒犻櫎杩囨湡鐨勭紦瀛樻暟鎹€傦級
BTW锛?/span>
Memcached鏄ぇ浣紝缂撳瓨瀹冩潵鎼烇紱
鍐呭瓨KV鍌ㄥ瓨鐪熸湁鏁堬紱
澶氱嚎绋嬨€乴ibevent浜嬩欢銆佸唴瀛樻搷浣滄€ц兘楂橈紱
鍒嗗竷寮忓疄鐜版湁涓€濂楋紝鏈嶅姟绔笉绠★紝瀹㈡埛绔痟ash鎼炶捣鐪熼珮妗ｏ紱
缂撳瓨娣樻卑鏈夌瓥鐣ワ紝LRU绠楁硶鏈€杩戞渶灏戝氨娣樻卑銆佸埌鏈熸棤鏁坘ey涓嶈锛?/span>
閰嶄笂鎳掓窐姹帮紝娣樻卑娣樻卑Memcached鐪熷帀瀹炽€?/span>
鎴戝氨鏄垜锛屾槸棰滆壊涓嶄竴鏍风殑鐑熺伀銆?br class="mq-338">鎴戝氨鏄垜锛屾槸涓庝紬涓嶅悓鐨勫皬鑻规灉銆?/code>脿鎮熺┖瀛﹂櫌锛?span class="mq-342">https://t.cn/Rg3fKJD
瀛﹂櫌涓湁Spring Boot鐩稿叧鐨勮绋嬶紒鐐瑰嚮銆?/span>闃呰鍘熸枃銆嶈繘琛屾煡鐪嬶紒
SpringBoot瑙嗛锛歨ttps://t.cn/R3QepWG
Spring Cloud瑙嗛锛歨ttps://t.cn/R3QeRZc
SpringBoot Shiro瑙嗛锛歨ttps://t.cn/R3QDMbh
SpringBoot浜ゆ祦骞冲彴锛歨ttps://t.cn/R3QDhU0
SpringData鍜孞PA瑙嗛锛歨ttps://t.cn/R1pSojf
SpringSecurity5.0瑙嗛锛歨ttps://t.cn/EwlLjHh
Sharding-JDBC鍒嗗簱鍒嗚〃瀹炴垬锛歨ttps://t.cn/E4lpD6e
~瑙嗛瀛︿範璇剧▼骞村害鏈€浣庝环 锛?span class="mq-376">鐐?/span>鍑汇€?/span>闃呰鍘熸枃銆嶈繘琛屾煡鐪?/span>~
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