ã»ãŒXNUMX幎åã«ç§ããã®èšäºãæžãããšãã
æšå¹Žã®æ £è¡ã¯ãåžå Žã®ç¶æ³ãåŸæ¥å¡ã«ãšã£ãŠæªãæ¹åã«åŸã ã«å€åããŠããããšã瀺ããŠããŸãã
- äžè¬çãªåŸæ¥å¡ãäŸç¶ãšããŠèªåèªèº«ã®éçšããŸãã¯å°ãªããšãåãå ¥ããããæ¡ä»¶ã§ã®éçšã«èå³ãããå ŽåïŒãã ããããªã³ããšã¯ã©ã¹ãããŒã«ã«ã¯è¿œå ã®ãªãã·ã§ã³ããããŸãïŒã
- ãã®å Žåãéçšäž»åŽã®äººäºã¯ãã®ããšã«ãŸã£ããèå³ããªãå¯èœæ§ããããŸãã
TL:DR 次ã«ãã€ã³ã¿ãã¥ãŒåãã€ã³ã¿ãã¥ãŒäžãã€ã³ã¿ãã¥ãŒåŸã®èå³æ·±ãæ°æ§ã®æé©åææ³ãšããã€ãã®ããã«æèã®æµãã«ã€ããŠèª¬æããŸãã èªãã§ããã«å察祚ãæããå¿ èŠã¯ãããŸããã
åŽååžå Žã§äœãå€ãã£ãã®ã
éå»æ°å¹Žéããã·ã¢é£éŠã®åŽååžå ŽïŒã¢ã¹ã¯ã¯ãå«ãïŒã¯äœåºŠãã²ã£ããè¿ã£ãã ããã«ã¯æ¬¡ã®ãããªå€ãã®èŠå ã圱é¿ããŸããã
- ãµãŒãã¹ã®ã¯ã©ãŠããžã®ç§»è¡ãã¢ãŠããœãŒã·ã³ã°ãªã©ã«ãããå€æ°ã®åŸæ¥å¡ã®éèŠãæžå°ã
- éèŠæ§é ããããšãã°ã·ã¹ãã 管çè ãã DevOps ãšã³ãžãã¢ã«å€æŽããŸã (èŠä»¶ã®ãªã¹ãã 10 è¡é·ããªããŸãã)
- äžéšã®åŽåè ã®ãã·ã¢é£éŠããã®ç§»äœïŒåž°éã¯äœåãæžå°ïŒ
- å°æ¹ããã®äººææµå ¥ã®çµç
- çµæžã¯ãå šäœãšããŠãããçµæžçã«ãªã£ã
- é·ãé話é¡ã«ãªã£ãŠããã®ãšåãã人å£çµ±èšãšæè²ã®ç©Žãã ããã§ãããã¯èµ·ãããŸãã - 25ã30幎éãä»æ¥ã®åŽåè ã¯äžè¬çã«ãäœããšãªããšãããç 究ãã1989幎ãã1999幎ã«åºççã¯å°ãäœäžããŸããã
ãã®çµæãã¢ã¹ã¯ã¯ã§åªç§ã§å®äŸ¡ãªåŽåè ãèŠã€ããããšã¯éåžžã«å°é£ã«ãªãïŒæã«ã¯äžå¯èœããããïŒãé«äŸ¡ãªåŽåè ãéãã ãã®ãéã¯ãããããŸããã
å°æ¹ã®å Žåãåªç§ãªåŸæ¥å¡ãäœããã®çç±ã§ã¢ã¹ã¯ã¯/ãµã³ã¯ãããã«ãã«ã¯ïŒããã³ãã以éïŒãžå»ããæ®ã£ãåŸæ¥å¡ã¯çŸåšã®è·å Žã«éåžžã«æºè¶³ããŠå®äœããŸããã
äŒæ¥ã¯ã©ã®ããã«åå¿ããŸããã?
äŒæ¥ã¯æšæ¥ããããã¯ä»æ¥ãåŸæ¥å¡ãå¿ èŠãšããŠããŸãã äŒæ¥ã«ã¯åŸæ¥å¡ãæè²ããæéãæ欲ãè³éããããŸãããã人äºéšéããæé©åããããŠããŸãã
次㮠XNUMX ã€ã®ãªãã·ã§ã³ããããŸãã
- å€éšè«è² æ¥è ã«ç³è«æžãæåºããŸããå€éšè«è² æ¥è ã¯ãäœããèŠã€ãã£ãå Žåã«åããŠãããŒã¿ããŒã¹ãã³ãã¯ã·ã§ã³ããã©ã㯠ãªã¹ããšãã¯ã€ã ãªã¹ã (ãã¡ããã誰ããåŠå®ããã§ããããããã©ã㯠ãªã¹ãã¯ãã§ã«å°ãªããšãäžåºŠã¯è¡šé¢åããŠããŸã)ãããã³æ€çŽ¢çµéšãæã£ãŠããŸãã
- é¢æ¥ãšè©Šçšæéã®ãã¹ãŠã®æ®µéã§ãå¿ èŠãªæ çµã¿ã«åãŸãããã«å·§åŠãªããªãã¯ãå®è¡ããŸãã
ãã®æçš¿ã§ã¯ããã®ãããªå·§åŠãªããªãã¯ããªã¹ãããããšã«å°å¿µããŸãã
1. å€éšå§èšå ïŒä»£çåºã»ããªãŒãšãŒãžã§ã³ãïŒã§æ¢ã
å¥çŽã¯åæã«è€æ°ã®ä»£çåºã«ç· çµãããå¯èœæ§ããããŸãã ãã®çµæã2ã3 ã®ç°ãªãçµç¹ãããã³ã³ãã¹ãã®ç¬¬ XNUMX ã¹ããŒãžã«ã»ãŒé²åºãããšãããç§ãã¡ã®ãã¬ã³ããªãŒãªè¥ããã€ãã¯äŒæ¥ã§åããã人ããšããèªåã¡ãŒã«ãåãåããŸããããããæžãã ãã§æžã¿ãŸããåæããŸãã ãŸããéµéã¯èªååãããŠãããŸãã ãªã¯ãšã¹ãã«å¯Ÿããå±¥æŽæžã®éžæã¯ããŒã¯ãŒãã«åºã¥ããŠè¡ãããŸãã
å±¥æŽæžã«ã¯ Linux (èŠãããšããããŸãã) ãŸã㯠Java (ç§ã®å¥œããªèšèªã§ã¯ãããŸãã) ãšæžãããŠããå ŽåããããŸããã*linux* ãéžæããå Žåã¯ããã§ååã§ãã
åŸæ¥å¡ (人äºã代çåº) ã® KPI ã¯ãé»è©±ãéµéã確èªæžã¿ã®é¢æ¥ã®æ°ããããŠäžè¬çã«ã¯ãããã«éãããå±¥æŽæžã®æ°ã«åºã¥ããŠèšç®ã§ããããããµã³ãã«ã«ããªãã®å±¥æŽæžãå«ãŸããŠããã°ããã®åŸã¯é»è©±ãåŸ ã€å¿ èŠãããå¯èœæ§ãé«ãããç§ã¯ããªãã«æçŽãæžããŸãããã®ãããªèŠæ ããªããã°è¯ãã®ã§ããããã ããäœãä»æ¥ã¯ä»äºã®æ¥ã®çãäžã§ããããªãã¯ãŸã æ®ã£ãŠããŸããã®ãããªéžæè¢ã¯ãããŸãããç§ã®è©±ãèããŠãã ãããããããåŸã§é»è©±ãããããæçŽãæžãããããã€ããã¯ãããŸãããã
ãã®çµæã
- åè£è ã倧éã®èªåã¡ãŒã«ïŒã¹ãã ïŒãåä¿¡ãã
- ãã¹ãŠã¯é¡§å®¢ã«è¡ããŸãã
ããã¯ãã¹ãŠã顧客ãšåŸæ¥å¡ã®äž¡æ¹ãããçšåºŠã€ã©ã€ã©ããããã®ã§ãããç¹ã«äººäºéšããã®æ¬¡ã®ãããªèŠæ ãèæ ®ãããšã次ã®ãããªãã®ã§ããããããä»äºãèå³æ·±ããã®ã«ãªãå¯èœæ§ã¯åžžã«ãããç¹å®ã®ææ¡ã®ç¹åŸŽãç解ããå¿ èŠããããŸãã
2. é¢æ¥åãé¢æ¥äžãé¢æ¥åŸã®ãã£ã¹ã«ãã·ã§ã³æ®µéã§ã®å·§åŠãªããªãã¯
æè¿ãç§ãã¡ã¯ãã·ã¢äººã®åºå®çµŠãžã®é¡æã«ã€ããŠåã³è°è«ããŸãã...絊æã¯120äžã«ãŒãã«ãååæããšã®ããŒãã¹ã¯190絊æã幎俞ã¯120...äžããããæ絊ã¯180äžã«ãŒãã«ã§ãã åè£è 㯠190 ã§ã¯äžååã ãšèšããç§ã« XNUMX ãææ¡ããŸãã ããããç§ãã¡ã¯ããªãã« XNUMX ãã«ãæäŸããŸããããã¯è¯ãããšã§ããã圌ããæ¯ææ¯æã£ãŠãããã°ã®è©±ã§ãã ä¿èšŒãå å®ããŠããããšãããŒãã¹ãå¥å¥ªãããããšã絊äžãåãäžãããããä¿ç®¡ããããããå¯èœæ§ãããããšã¯æããã§ã...ããã¯å®å®ãæããã¬ãã¢ã«äžä»£ã§ãããã? ïŒã€ã³ã¿ãŒãããããåŒçšïŒ
2.1 é¢æ¥åã®ã³ã
- ããã«ã¡ã¯ãç§ãã¡ã¯äººæãæ¢ããŠããŸãã å®éããã®çµç¹ã¯åŸæ¥å¡ãæ¢ããŠããã®ã§ã¯ãªãããäºååœ¹å šäœã®ããã®ãæ ç¹ãåéããŠããã®ã ã ãã®ãããæãè¿ãã®é»è©±ã¯ã»ãšãã©æ¥ãªããªããŸãã
- 絊äžã®æ瀺ã¯äžåãªãããåå¥ã®å¯Ÿå¿çãè¡ã£ãŠãããŸããã ãã®æ¹æ³ã®çç±ã¯ããã£ãŠããŸãããäžè¬ã«ã2ã3 åã®é¢æ¥åã«ãã©ãŒã¯ãçºè¡šãããªãå Žåãããã¯æªãå åã§ãã
- ç³åããã絊äžã¯ç·é¡ã§ãã (å°ãªããšãå人æåŸçšã®åãçµ±äžç€ŸäŒçšã®åã§ã¯ãããŸãã)ãKPI 㯠100% ã§ãå¯èœãªãã¹ãŠã®ããŒãã¹ãå«ãŸããŠããŸãã
- èšèŒãããŠãã絊æã¯å šãããããŸããã ããšãã°ãæ¬ å¡ã¯ãæ倧 200 åããšè¡šç€ºãããŸãããå®éã«ã¯ãæ倧 150 åïŒããŒãã¹ä»ãïŒãïŒã¢ã¹ã¯ã¯ã®å ŽåïŒããŸãã¯ãã®å°åã§ã¯ãæ倧 80 åãïŒå®éã«ã¯ 50 å以äžïŒã«ãªãå¯èœæ§ããããŸãã ã©ã¡ãã®å Žåãå®æ°ã§ãããæ°å€ã¯åæšäºå ¥ãããŠããŸãã
- ãããªã«å€ããäžããããšã¯ã§ããŸããã ããã§ã®åé¡ã¯ããªãã¯ã®é åã§ã¯ãããŸããããå«ç 宀㧠XNUMX ïœ XNUMX ãæåŸã«ååãããã£ãšå¯èœæ§ãããããšã«æ°ã¥ãããšããããŸãã å€ãã®å ŽåãååãšçµŠäžã«ã€ããŠè©±ãåãããšã®çŠæ¢ãšçµã¿åãããããŸãã
- ã¯ã©ã¹ A ã®ãªãã£ã¹ããããåºã Zh ã«ãããŸããã¢ã¹ã¯ã¯ã®äŸãšããŠã¯ãå°äžé R é§ ã«ãã K ã®ãªãã£ã¹ããããŸãã
- ã¯ã©ã¹ A ãªãã£ã¹ã§ããããã¥ã¢ã³ã¹ãç°ãªããŸããè·å Žã¯é¡§å®¢ã®å Žæã«ãªããŸãã
- ã¯ã©ã¹ A ãªãã£ã¹ã§ãããé§è»ã¹ããŒã¹ã¯æäŸãããªããšãã泚æç¹ããããŸãã æçš¿ãæžãããšã
éç©è³ªçãªåæ© - ããã«å«ãŸãããã® ããã®åŸãããã§ã¯èªè»¢è»é§è»å Žã®ã¿ãå«ãŸããŠããŸããããäžæ¹ãäžéšã®ãã¯ã©ã¹Aããªãã£ã¹ã§ã¯ãé§è»å Žã¯ãããã©ã«ãã§ãæäœæéã«å«ãŸããŠããŸããã
çŸä»£ã®ç¶æ³ã§ã¯ãè»ããã€ã¯ãèªè»¢è»ãããã³ã¹ã¯ãŒã¿ãŒãå é»ããããã®ã³ã³ã»ã³ããåããå±æ ¹ä»ãé§è»ã¹ããŒã¹ã®æç¡ã«ã€ããŠå°ããå¿ èŠããããŸãã ããããã®å Žæã¯ããã£ããåŸãã§ã¯ãªããä»ãã§ãã
é¢æ¥åã«åè£è ãæé€ãã
- èªååã·ã¹ãã ã䜿çšãããšããçŸåšã®ä»äºã«å±¥æŽæžã衚瀺ããªããèšå®ã«é¢ä¿ãªããåŸæ¥å¡ã®å±¥æŽæžã®æŽæ°ã远跡ã§ããŸãã
- ç¯ãããã€ãªããã«ãã£ãŠãååã«ããããªç€Ÿå¡ãéè·ãããããšç¥ãããããšãã§ããããã«ãªããæã«ã¯æ§ã ã§èå³æ·±ãå¹æãçãŸããããšããããŸãã çµå±ãæ é·ã®ãªãŒã«ãé¢ããã€ããã¯ãªãã£ãããã§ãããçµå±ã¯é¢ããªããã°ãªããªãããšãåãããŸããã ãã¡ããããã®ãµãé ç®ã¯åãªãåã§ãããçŸå®ã«ã¯èµ·ãããŸããã
2.2 é¢æ¥äžã®ã³ã
- é¢æ¥ã®æ®µéã§äžå®ã®éé¡ã確èªããéçšå¥çŽæžã§éé¡ãæ¹ããŠç¢ºèªããŸãã é©ãã¹ãããšã«ãããã¯èµ·ãããŸãã
- è©Šçšæéã®æ¡ä»¶ãææ§ã ããšãã°ãè©Šçšæéäžã®çµŠäžã¯ 30% æžé¡ãããå¯èœæ§ããããŸãããè©Šçšæé㯠XNUMX ãæã§ããå ŽåããããŸãããXNUMX ãæã§ããå ŽåããããŸã (ãã·ã¢é£éŠã®åŽåæ³ã«ããã°ãéåžžã®è·ã«ã€ããŠã¯ãã以äžã®çµŠäžã¯èªããããŠããŸããã -éåžžã®ããžã·ã§ã³ã§ãå¯èœã§ãïŒã
- æçœã§ã¯ãªããã€ã³ãã䌎ããæé»ã®è€éãªããŒãã¹ ã·ã¹ãã ã ããšãã°ãããŒãã¹ã¯å®éã«åŠçãè¡ããªããã°åŸãããŸããã
- ãŸã£ããç°ãªãæ¹åã®è³ªåãåŸæ¥å¡ã«äžããåçŽãã€éåžžã®ãã¬ãã·ã£ãŒã ãäœãå幎åã«äžåºŠäœ¿ã£ããã¯ãããžãŒã®å®è£ ã«ã€ããŠãããªãã¯ç¥ããªãã®ã§ããã - ããããç§ãã¡ã¯ããªãã«ãã£ãšæåŸ ããŠããŸããããããªãã¯çŽæããŠããããã§ããN ã® 1/2 ã§ä»ããåå ããŠããããŸãããã 3 幎以å ã«è©±ãåãã話ãåããããããããªãã®çµŠæã 5 ããŒã»ã³ãåŒãäžããã§ããããç§ãã¡ã¯ããªãã®å¯èœæ§ãèŠåºããŠããŸãã
- ããŸããŸãªäººãžã®è€æ°ã®ã€ã³ã¿ãã¥ãŒã è¯ããŠã2人ã®ç°ãªãSBãææªã®å Žåã¯ãå šå¡ã䞊ãã§æèŠããŸãšãããã€ã³ã¿ãã¥ãŒã®ã¢ã€ãã¢ã®ã³ããŒã«ãªãã ããã éšåçã« - ãããã³ã°ã«é¢ãããã¹ãã®åçŸã åŸæ¥å¡ã®å Žåãé¢æ¥ã ã㧠2 ïœ 3 é±éãã 1.5 ïœ 2 ãæãããæ倱ãçºçããŸãã ãã€ã誰ãšäœåã®é¢æ¥ãèšç»ãããŠããããããã«æ確ã«ããŸãã åé¡ã¯ããããã®é¢æ¥ãå®éã«ïŒå®åçã«ïŒå¿ èŠã§ãããšåæã«ãæåã®åè£è ã§ã¯ãªããšæãããåè£è ãçªç¶æåŠããå Žåãåè£è ãåŒãçããããã®æ段ã§ããå¯èœæ§ãããããšã§ãã
2.3 é¢æ¥åŸã®ã³ã
- ä¿çããŠããã ãããæãè¿ããé»è©±ãããŠããã ããŸãã 翻蚳: ããå°ãæ°ã«å ¥ã£ã (ãŸãã¯å°ã䟡å€ãäœã) åè£è ããã§ã« 1.5 人 (ãŸã㯠XNUMX 人) ããŸããã圌ãæåŠããå Žåã¯é£çµ¡ããå¯èœæ§ããããŸãããããã¯ç¢ºå®ã§ã¯ãããŸããã ç§ã®ãä¿çãèšé²ã¯ XNUMX ãæã§ãã (ç§ã¯åŸ ã¡ãŸããã§ãã)ã
- ãæåã®çµŠæã¯XNUMXãæç®ã®éäžã«æ¯æãããããšãã£ãè€éãªçµŠæã®æ¯æãæ¹æ³ã
- ææåŽåå¥çŽã®ç»é²ã ææéçšå¥çŽã¯ãã¹ãŠã®åœäºè ã«ãšã£ãŠã¡ãªããããããŸãããå Žåã«ãã£ãŠã¯ç¡è²¬ä»»ãªéçšäž»ããããå©çšããŠåŸæ¥å¡ã«å§åããããå¯èœæ§ããããŸãã
- å®éã®åŽåæéã®è€éãªèšé²ã ããã«ã¯å€ãã®ãªãã·ã§ã³ããããŸãã ãã®åé¡ã¯ãå€åæ¥ã®éå§ããå§ãŸããæéå€åŠçãšäŒèšäžè¬ã«è³ããŸã§ãåžžã«æ確ã«ããŠãã ããã
- åŠçã«å¯Ÿããå®éã®æ¯æãã ãå€åæéãäžèŠåãªã®ã§ã20æåéå€ãç¿æ £ã§ã¯ãããŸãããããšããäžèšããå§ãŸããããŸããŸãªå·¥å€«ã調æŽã®äœå°ããããŸãã
- ãåœçªãããªã³ã³ãŒã«ãšãåŒã°ããŸãã ãã®è©±é¡ã¯æè¿ããããã£ã¹ã«ãã·ã§ã³ã§ãããã¯ç§ãã¡ã«ãšã£ãŠå¿ é ã§ããããšããèšèãšãšãã«è©±é¡ã«ãªããŸããã ãã®åé¡ã¯ 3 ã€åã®è·å Žã§ç§ã«åœ±é¿ãåãŒããŸããããã®å 容ã¯æ¬¡ã®ãšããã§ããæ³å®äŒæ¥ã«ã¯ãã©ã¡ãã (ãŸãã¯äž¡æ¹) ã®æ¥ã¯ 2 ïœ 3 æéåã«è·å Žã«å°çããæºåãã§ããŠããå¿ èŠããããŸãã
圢åŒçã«ã¯ãããªãã¯ä»äºäžã§ã¯ãªãã圌ãã¯ãã®æéã®ããã«ããªãã«æ¯æã矩åã¯ãããŸããïŒãããŠåœŒãã¯ããŸãã - ãéã¯ãããŸããããããªãã¯ææ ¢ããŸãïŒããã¢ã¹ã¯ã¯ã®å Žåã2æéåã«å°çãããšããããšã¯ãããªããæ¯èŒçäœè£ãããããšãæå³ããŸãèªç±ã§ãå°å³ã§ããäŒãã§ããŸãã ãããã£ãŠãå®å šã«èªç±ãªæéãããã°ãXNUMXæ¥ã ãã§ãªãXNUMXæ¥åãå Žåã«ãã£ãŠã¯é±æ«å šäœã倱ãããããŒããã¥ãŒã®ããã«ããŒãã£ã«è¡ãããšã¯ã§ããªããªããŸãã
æ°å¹Žåããã®è·å Žã§ã¯é¢æ¥ã§ãå²å¢è³éã¯ããããããå€åé »åºŠã¯ãããããã§ãããšèª¬æãåããŸããã ãã®æã¯åã£ãŠããŸãããã次ã®è·å Žã§ã¯ç»é²ãããŸã§æããŠãããªããããããŸããã
- ãã£ãªã¢ã®æé·ããã³ãã®ä»ã®æ瞟ãšè©äŸ¡ã ããã©ãŒãã³ã¹ãåäžããããšåæã«ããã©ãŒãã³ã¹ãæãªãå¯èœæ§ããããã XNUMX ã€ã®ã¡ã«ããºã ã äžæ¹ã§ã錻ã®åã«ãã³ãžã³ãã¶ãäžãããšãå®éã«éãèµ°ããããã«ãªããŸãã ãã®äžæ¹ã§ããã®ãã³ãžã³ã®å¯èœæ§ãã®ãã®ãããã°ããã®éã¯èµ°ãã®ã«åœ¹ç«ã€ããšããããŸããããã³ãžã³ã«å°éããã®ãæ ¹æ¬çã«äžå¯èœã§ãããšå€æããåŸã¯ããã³ãžã³ãè¿œããããããšã¯ãã¯ãããã»ã©é¢çœããªããªããŸãã
- å°çã ãçœè²è³éãã®å¢å ã¯ããã¯ããçµ±äžç€ŸäŒçšïŒOSNã匷å¶å»çä¿éºãVNiMïŒãšå·å®³ãšå人æåŸçšã®æ¯æããå¿ ãããæçã§ãããšã¯éããªããšããäºå®ã«åž°çããããå°çãããã°ãéžæè¢ã¯ãã€ã§ãå¯èœã§ããã
- 瀟å ç ä¿®ãªã©ã®éç©è³ªçãªã¢ãããŒã·ã§ã³ã®äžéšãæžäŸ¡ååŽããŸãã ãã®ãããªãã¬ãŒãã³ã°ã¯ç©æ¥µçã«è¡ãããšãã§ããå®éã«ã¯ãå幎ããšã«ãç§ãã¡ã®ããã«åãããšãã§ããŠãšãŠãå æ ã§ãããšããåæ¥ã®ã¹ããŒãªãŒããã®ä»ã®ããŒã ã²ãŒã ã§æ§æãããããšããããŸãã ç§ãå人çã«èŠããšããã«ãããšãå€åæ¥ã®åŸã®ãã¬ãŒãã³ã°ã¯ããã¯ããŠã«ä¹ã£ãŠè¡ãããšããåŸæ¥å¡ã«çµŠæãããããäžããããšãã©ã®ããã«äŒããããããããŠãããããæåã§æåŸã«äŒã人ãã¡ãšããŒã ãäœãããšã«ãªããæéã"
- éç©è³ªçåæ©ã®äžéšã®æžäŸ¡ååŽã 5 幎ã»ã©åã«ã¯ãè
ã䌞ã°ããŠæ°ãããã¯ãããžãŒãç©æ¥µçã«ç 究ããèœåãå¿
èŠã§ããã æè¿ã§ã¯ãç¡æãŸãã¯ã»ãŒç¡æã®ã³ãŒã¹ãåæããã ã㧠XNUMX ããŒãžåã®ããã¹ããå¿
èŠã«ãªããŸããããšãã°ãããã§ã¯ã
ãŽã€ãšã ãŠã§ã¢ ã ããã«ã¹ãã¬ãŒãž ã·ã¹ãã ãšãã¥ã¬ãŒã¿ã®éžæ ã ããã«MSã©ã AWS ã Azure ã®æè²æ©é¢åããµãã¹ã¯ãªãã·ã§ã³ã¯èšããŸã§ããããŸããã
æå人ã®ãããã§
åºæïŒ habr.com