GFSã¯ããããæãæåãªåæ£ãã¡ã€ã«ã·ã¹ãã ã§ãã ä¿¡é Œæ§ã®é«ãã¹ã±ãŒã©ãã«ãªããŒã¿ã¹ãã¬ãŒãžã¯ãã€ã³ã¿ãŒãããäžã®ãã¹ãŠã®ããã¥ã¡ã³ãã®ããã«ãèšå€§ãªããŒã¿ãæ±ãã¢ããªã±ãŒã·ã§ã³ã«ãšã£ãŠäžå¯æ¬ ã§ãã GFSã¯Googleã®äž»èŠãªã¹ãã¬ãŒãžãã©ãããã©ãŒã ã§ãã GFSã¯ãèšå€§ãªéã®æ å ±ãä¿åããã³åŠçã§ãã倧èŠæš¡ãªåæ£ãã¡ã€ã«ã·ã¹ãã ã§ãã
GFSã¯ã次ã®åºæºã«åºã¥ããŠæ§ç¯ãããŸããã
- ãã®ã·ã¹ãã ã¯ãå€ãã®å Žåæ éããéåžžã®å®äŸ¡ãªæ©åšã§æ§æãããŠããŸãã é害ã®ç£èŠãããã³ã·ã¹ãã ã®æ©èœãå埩ããããã®æ©åšã®é害ã®å¯èœæ§ããããŸãã
- ã·ã¹ãã ã¯å€ãã®å€§ããªãã¡ã€ã«ãä¿åããå¿ èŠããããŸãã ååãšããŠããããã100 MB以äžã®æ°çŸäžã®ãã¡ã€ã«ã å€ãã®å Žåãæ°ã®ã¬ãã€ãã®ãã¡ã€ã«ãæ±ãå¿ èŠããããŸããããããå¹æçã«ä¿åããå¿ èŠããããŸãã å°ããªãã¡ã€ã«ãä¿åããå¿ èŠããããŸãããã·ã¹ãã ã¯ãããã«å¯ŸããŠæé©åãããŠããŸããã
- ååãšããŠãèªã¿åãã«ã¯2ã€ã®ã¿ã€ãããããŸãã倧éã®é£ç¶ããããŒã¿ã®èªã¿åããšãå°éã®ä»»æã®ããŒã¿ã®èªã¿åãã§ãã 倧ããªããŒã¿ã¹ããªãŒã ãèªã¿åããšãã¯ã1 MB以äžã®ãã©ã°ã¡ã³ããèŠæ±ããã®ãäžè¬çã§ãã 1ã€ã®ã¯ã©ã€ã¢ã³ãããã®ãã®ãããªé 次æäœã¯ãå€ãã®å Žåãåããã¡ã€ã«ã®é£ç¶éšåãèªã¿åããŸãã éåžžãå°ããªããŒã¿ãµã€ãºã®èªã¿åãã«ã¯æ°ãããã€ãã®ããªã¥ãŒã ããããŸãã éèŠãªã©ã³ã¿ã€ã ã¢ããªã±ãŒã·ã§ã³ã¯ããã®ãããªèŠæ±ãäžå®æ°èç©ãããã¡ã€ã«ã®å é ããã®ãªãã»ããã§äžŠã¹æ¿ããå¿ èŠããããŸãã ããã«ãããæ£æ©ãèªãã§ãããšãã«ååŸãèŠãã®ãé¿ããããšãã§ããŸãã
- å€ãã®å Žåããã¡ã€ã«ã«è¿œå ããå¿ èŠããã倧éã®é£ç¶ããããŒã¿ãæžã蟌ãæäœããããŸãã éåžžãæžã蟌ãããŒã¿ã®éã¯èªã¿åãã®å Žåãšåãé åºã§ãã ååãšããŠããã¡ã€ã«å ã®ä»»æã®å Žæãžã®å°éã®èšé²ã¯å¹ççã«å®è¡ãããŸããã
- ã·ã¹ãã ã¯ãè€æ°ã®ã¯ã©ã€ã¢ã³ããåæã«åããã¡ã€ã«ã«ããŒã¿ãè¿œå ããããšããå Žåãè€æ°ã®ã¯ã©ã€ã¢ã³ãã®äžŠåæäœã®å³å¯ã«å®çŸ©ãããã»ãã³ãã£ã¯ã¹ãå®è£ ããå¿ èŠããããŸãã ãã®å Žåãåäžã®ãã¡ã€ã«ã«å¯Ÿããæ°çŸã®æžã蟌ã¿èŠæ±ãåæã«å°çããããšããããŸãã ããã«å¯ŸåŠããããã«ããã¡ã€ã«ã«ããŒã¿ãè¿œå ããæäœã®ååæ§ããããçšåºŠã®åæã䌎ã£ãŠäœ¿çšãããŸãã ã€ãŸããèªã¿åãæäœãåä¿¡ããããšã次ã®æžã蟌ã¿æäœã®åãŸãã¯åŸã«å®è¡ãããŸãã
- çãã¬ã€ãã³ã·ãŒãããé«ãã¹ã«ãŒããããåªå ãããŸãã ãã®ãããGoogleã®ã»ãšãã©ã®ã¢ããªã±ãŒã·ã§ã³ã¯ã倧éã®ããŒã¿ãé«éã§åŠçããããšã奜ã¿ãäžè¬çã«èšãã°ãåäžã®èªã¿åãããã³æžã蟌ã¿æäœã®ããã©ãŒãã³ã¹ãæ¡åŒµã§ããŸãã
GFSã®ãã¡ã€ã«ã¯ãä»ã®ãã¡ã€ã«ã·ã¹ãã ãšåæ§ã«ããã£ã¬ã¯ããªã䜿çšããŠéå±€çã«ç·šæãããç¬èªã®æ¹æ³ã§èå¥ãããŸãã GFSã®ãã¡ã€ã«ã§éåžžã®æäœãå®è¡ã§ããŸãïŒäœæãåé€ãéããéãããèªã¿åããæžã蟌ã¿ã
ããã«ãGFSã¯ããã¯ã¢ãããŸãã¯ã¹ãããã·ã§ããããµããŒãããŠããŸãã ãã®ãããªããã¯ã¢ããããã¡ã€ã«ãŸãã¯ãã£ã¬ã¯ããªããªãŒçšã«äœã³ã¹ãã§äœæã§ããŸãã
GFSã¢ãŒããã¯ãã£

åçã¯å ã®èšäºããåãããŠããŸãã
ã·ã¹ãã ã«ã¯ãå®éã«ããŒã¿ãä¿åãããã¹ã¿ãŒãµãŒããŒãšãã£ã³ã¯ãµãŒããŒããããŸãã éåžžã GFSã¯ã©ã¹ã¿ãŒã¯ã1å°ã®ãã¹ã¿ãŒãã·ã³ãšããã£ã³ã¯ãµãŒããŒãã¡ã€ã«ïŒãã£ã³ã¯ãµãŒããŒïŒã®ãã©ã°ã¡ã³ããæ ŒçŽããå€æ°ã®ãã·ã³ã§æ§æãããŸãã 顧客ã¯ããããã¹ãŠã®ãã·ã³ã«ã¢ã¯ã»ã¹ã§ããŸãã GFSã®ãã¡ã€ã«ã¯ãæçã«åå²ãããŸã-ãã£ã³ã¯ïŒãã£ã³ã¯ããã©ã°ã¡ã³ããšèšãããšãã§ããŸãïŒã ãã£ã³ã¯ã®ãµã€ãºã¯åºå®ãããŠãããã«ã¹ã¿ãã€ãºã§ããŸãã ãã®ãããªåãã£ã³ã¯ã«ã¯ããã£ã³ã¯ã®äœææã«ãã¹ã¿ãŒã«ãã£ãŠçºè¡ãããäžæã®ã°ããŒãã«64ãããããŒããããŸãã ãã£ã³ã¯ãµãŒããŒã¯ãéåžžã®Linuxãã¡ã€ã«ã®ãããªãã£ã³ã¯ãããŒã«ã«ããŒããã©ã€ãã«ä¿åããŸãã ä¿¡é Œæ§ã®ããã«ãåãã£ã³ã¯ãä»ã®ãã£ã³ã¯ãµãŒããŒã«è€è£œã§ããŸãã 3ã€ã®ã¬ããªã«ãäžè¬çã«äœ¿çšãããŸãã
ãŠã£ã¶ãŒãã¯ããã¡ã€ã«ã·ã¹ãã å šäœã®ã¡ã¿ããŒã¿ãæäœããŸãã ã¡ã¿ããŒã¿ã«ã¯ãåå空éãããŒã¿ã¢ã¯ã»ã¹å¶åŸ¡æ å ±ããã£ã³ã¯ãžã®ãã¡ã€ã«ã®ãããã³ã°ããã£ã³ã¯ã®çŸåšã®äœçœ®ãå«ãŸããŸãã ãŸãããã¹ã¿ãŒã¯ã空ããã£ã³ã¯ã®ç®¡çãã¬ããŒãžã³ã¬ã¯ã·ã§ã³ïŒäžèŠãªãã£ã³ã¯ã®åéïŒããã£ã³ã¯ãµãŒããŒéã§ã®ãã£ã³ã¯ã®ç§»åãªã©ãã·ã¹ãã ã®ãã¹ãŠã®ã°ããŒãã«ã¢ã¯ãã£ããã£ãå¶åŸ¡ããŸãã ãŠã£ã¶ãŒãã¯ããã£ã³ã¯ãµãŒããŒãšåžžã«ã¡ãã»ãŒãžïŒHeartBeatã¡ãã»ãŒãžïŒã亀æããŠãæ瀺ãåºããã¹ããŒã¿ã¹ãå€æããŸãïŒãŸã çããŠãããã©ããã確èªããŸãïŒã
ã¯ã©ã€ã¢ã³ãã¯ãã¡ã¿ããŒã¿ã«é¢é£ããæäœãå®è¡ããããã«ã®ã¿ãŠã£ã¶ãŒããšå¯Ÿè©±ããŸãã ããŒã¿èªäœã«å¯Ÿãããã¹ãŠã®æäœã¯ããã£ã³ã¯ãµãŒããŒã§çŽæ¥å®è¡ãããŸãã GFS-ã·ã¹ãã ã¯POSIX APIããµããŒãããŠããªããããéçºè ã¯VNode Linuxã¬ãã«ããããå¿ èŠããããŸããã§ããã
éçºè ã¯ããŒã¿ãã£ãã·ã¥ã䜿çšããŸããããã¯ã©ã€ã¢ã³ãã¯ã¡ã¿ããŒã¿ããã£ãã·ã¥ããŸãã ãã£ã³ã¯ãµãŒããŒã§ã¯ãLinuxãªãã¬ãŒãã£ã³ã°ã·ã¹ãã ã¯æ¢ã«æã䜿çšãããŠãããããã¯ãã¡ã¢ãªã«ãã£ãã·ã¥ããŠããŸãã äžè¬ã«ããã£ãã·ã¥ãæåŠãããšããã£ãã·ã¥ã®æå¹æ§ïŒãã£ãã·ã¥ã®äžè²«æ§ïŒã®åé¡ã«ã€ããŠèããå¿ èŠããªããªããŸãã
ãã¹ã¿ãŒ
1ã€ã®ãŠã£ã¶ãŒãã䜿çšãããšãã·ã¹ãã ã¢ãŒããã¯ãã£ãå€§å¹ ã«ç°¡çŽ åãããŸãã ãã£ã³ã¯ã®è€éãªç§»åãå®è¡ããã°ããŒãã«ããŒã¿ã䜿çšããŠã¬ããªã±ãŒã·ã§ã³ãæŽçã§ããŸãã 1ã€ã®ãã¹ã¿ãŒã ããååšããããšãã·ã¹ãã ã®ããã«ããã¯ã«ãªãã¯ãã§ãããããã§ã¯ãããŸããã ã¯ã©ã€ã¢ã³ãããŠã£ã¶ãŒããä»ããŠããŒã¿ãèªã¿æžãããããšã¯ãããŸããã 代ããã«ãã©ã®ãã£ã³ã¯ãµãŒããŒãšéä¿¡ããå¿ èŠããããããŠã£ã¶ãŒãã«å°ããŠããããã£ã³ã¯ãµãŒããŒãšçŽæ¥éä¿¡ããŸãã
ã¯ã©ã€ã¢ã³ããããŒã¿ãèªã¿åãæ¹æ³ãæ€èšããŸãã ãŸãããã£ã³ã¯ã®ãµã€ãºãç¥ã£ãŠã
ãã¡ã€ã«åãšãã¡ã€ã«ã®å é ããã®çžå¯Ÿãªãã»ããã«ãããã¯ã©ã€ã¢ã³ãã¯ãã¡ã€ã«å ã®ãã£ã³ã¯ã®æ°ã決å®ããŸãã 次ã«ããã®ãã¡ã€ã«å ã®ãã¡ã€ã«åãšãã£ã³ã¯çªå·ãå«ãèŠæ±ããã¹ã¿ãŒã«éä¿¡ããŸãã ãã¹ã¿ãŒã¯ãåã¬ããªã«ã«1ã€ãã€ãå¿ èŠãªãã£ã³ã¯ãæ ŒçŽãããã£ã³ã¯ãµãŒããŒãçºè¡ããŸãã ãŸãããŠã£ã¶ãŒãã¯ã¯ã©ã€ã¢ã³ãã«ãã£ã³ã¯èå¥åãæäŸããŸãã
次ã«ãã¯ã©ã€ã¢ã³ãã¯ãã©ã®ã¬ããªã«ãæé©ãïŒéåžžã¯æãè¿ãã¬ããªã«ïŒã決å®ãããã£ã³ã¯ãšãã£ã³ã¯ã®å é ããã®ãªãã»ããã§æ§æãããèŠæ±ãéä¿¡ããŸãã ããŒã¿ãããã«èªã¿åãããã«ããŠã£ã¶ãŒãã®ä»å ¥ã¯å¿ èŠãããŸããã å®éã«ã¯ãååãšããŠã1ã€ã®èªã¿åãèŠæ±ã®ã¯ã©ã€ã¢ã³ãã¯äžåºŠã«è€æ°ã®ãã£ã³ã¯ãå«ã¿ããã¹ã¿ãŒã¯1ã€ã®åçã§åãã£ã³ã¯ã®åº§æšãæäŸããŸãã
ãã£ã³ã¯ãµã€ãºã¯ãã·ã¹ãã ã®éèŠãªæ©èœã§ãã ååãšããŠã64ã¡ã¬ãã€ãã«èšå®ãããŠãããéåžžã®ãã¡ã€ã«ã·ã¹ãã ã®ãããã¯ãµã€ãºãããã¯ããã«å€§ãããªã£ãŠããŸãã ãµã€ãºããã£ã³ã¯ã®ãµã€ãºãããå°ããå€ãã®ãã¡ã€ã«ãæ ŒçŽããå¿ èŠãããå Žåãäœåãªã¡ã¢ãªã倧éã«æ¶è²»ããããšã¯æããã§ãã ãããããã®ãããªå€§ããªãã£ã³ã¯ãµã€ãºã®éžæã¯ãGoogleãã¯ã©ã¹ã¿ãŒã§è§£æ±ºããªããã°ãªããªãã¿ã¹ã¯ã«ãããã®ã§ãã ååãšããŠãã€ã³ã¿ãŒãããäžã®ãã¹ãŠã®ããã¥ã¡ã³ãã«ã€ããŠäœããèæ ®ããå¿ èŠãããããããããã®ã¿ã¹ã¯ã®ãã¡ã€ã«ã¯éåžžã«å€§ãããªããŸãã
ã¡ã¿ããŒã¿
ãŠã£ã¶ãŒãã¯ããã¡ã€ã«ãšãã£ã³ã¯ã®ããŒã ã¹ããŒã¹ããã£ã³ã¯ãžã®ãã¡ã€ã«ã®ãããã³ã°ããã£ã³ã¯ã®ã¬ããªã«ã®äœçœ®ã®3ã€ã®éèŠãªã¿ã€ãã®ã¡ã¿ããŒã¿ãä¿åããŸãã ãã¹ãŠã®ã¡ã¿ããŒã¿ã¯ãã¹ã¿ãŒã®ã¡ã¢ãªã«ä¿åãããŸãã ã¡ã¿ããŒã¿ã¯ã¡ã¢ãªã«ä¿åãããããããŠã£ã¶ãŒãã®æäœã¯é«éã§ãã ãŠã£ã¶ãŒãã¯ãã·ã¹ãã å ã®ç¶æ³ãç°¡åãã€å¹ççã«èªèããŸãã ããã¯ã°ã©ãŠã³ãã§ãã£ã³ã¯ãµãŒããŒãã¹ãã£ã³ããŸãã ãããã®å®æã¹ãã£ã³ã¯ããã£ã³ã¯ãµãŒããŒã®ããŒããã©ã€ãã®è² è·ãšç©ºãã¹ããŒã¹ã®ãã©ã³ã¹ããšãããã«ãã¬ããŒãžã³ã¬ã¯ã·ã§ã³ãè¿œå ã®ã¬ããªã±ãŒã·ã§ã³ããã£ã³ã¯ãµãŒããŒãå©çšã§ãããã£ã³ã¯ã移åããå Žåã«äœ¿çšãããŸãã
ãŠã£ã¶ãŒãã¯ãã£ã³ã¯ã®äœçœ®ã远跡ããŸãã ãã£ã³ã¯ãµãŒããŒãèµ·åãããšããã¹ã¿ãŒã¯ãã®ãã£ã³ã¯ãèšæ¶ããŸãã ãã®ããã»ã¹ã§ã¯ããŠã£ã¶ãŒãã¯ãã£ã³ã¯ã®ãã¹ãŠã®åããšãã£ã³ã¯ãµãŒããŒã®ç¶æ ãç£èŠããŸãã ãããã£ãŠã圌ã¯åãã£ã³ã¯ã®äœçœ®ã«é¢ãããã¹ãŠã®æ å ±ãæã£ãŠããŸãã
ã¡ã¿ããŒã¿ã®éèŠãªéšåã¯ãæäœã®ãã°ã§ãã ãŠã£ã¶ãŒãã¯ãäžé£ã®éèŠãªã¡ã¿ããŒã¿ã®å€æŽãä¿åããŸãã æäœãã°ã®ãããã®ããŒã¯ã«åºã¥ããŠãã·ã¹ãã ã®è«çæéã決å®ããŸãã ãã¡ã€ã«ãšãã£ã³ã¯ã®ããŒãžã§ã³ã決å®ããã®ã¯ããã®è«ççãªæéã§ãã
æäœãã°ã¯éèŠãªéšåã§ãããããå®å šã«ä¿åããå¿ èŠãããããã®å€æŽã¯ãã¹ãŠãã¡ã¿ããŒã¿ãå€æŽãããå Žåã«ã®ã¿ã¯ã©ã€ã¢ã³ãã«è¡šç€ºãããå¿ èŠããããŸãã æäœãã°ã¯è€æ°ã®ãªã¢ãŒããã·ã³ã«è€è£œãããã·ã¹ãã ã¯ãã®ãã°ããªã¢ãŒããã£ã¹ã¯ã®ãã¹ã¿ãŒãã£ã¹ã¯ããã³ãã£ã¹ã¯ã«ä¿åããåŸã«ã®ã¿ã¯ã©ã€ã¢ã³ãæäœã«å¿çããŸãã
ãŠã£ã¶ãŒãã¯ãæäœã®ãã°ãå®è¡ããŠã·ã¹ãã ã®ç¶æ ã埩å ããŸãã æäœãã°ã®ãµã€ãºã¯æ¯èŒçå°ãããææ°ã®æäœã®ã¿ãä¿åãããŸãã ãã®ããã»ã¹ã§ã¯ããã°ã®ãµã€ãºãç¹å®ã®å€ãè¶ ãããšãŠã£ã¶ãŒããã³ã³ãããŒã«ãã€ã³ããäœæããã·ã¹ãã ãæãè¿ãã³ã³ãããŒã«ãã€ã³ãã«ã®ã¿åŸ©å ã§ããŸãã ããã«ãã°ã§ãããã€ãã®æäœãåå®è¡ã§ãããããã·ã¹ãã ã¯æåŸã®ã³ã³ãããŒã«ãã€ã³ããšçŸåšã®æå»ã®éã®ãã€ã³ãã«ããŒã«ããã¯ã§ããŸãã
ã·ã¹ãã ã®çžäºäœçš
ã·ã¹ãã ã¢ãŒããã¯ãã£ã«ã€ããŠã¯äžèšã§èª¬æããŸãããããã«ãããæäœã®å®è¡ã«ããããŠã£ã¶ãŒãã®ä»å ¥ãæå°éã«æããããŸãã 次ã«ãã¯ã©ã€ã¢ã³ãããã¹ã¿ãŒãããã³ãã£ã³ã¯ãµãŒããŒãããŒã¿ã移åããã¢ãããã¯æžã蟌ã¿æäœãå®è¡ããããã¯ã¢ããïŒã¹ãããã·ã§ããïŒãäœæããããã«ã©ã®ããã«çžäºäœçšããããèŠãŠã¿ãŸãããã
ãã£ã³ã¯å ã®åå€æŽã¯ããã¹ãŠã®ã¬ããªã«ã«è€è£œãããã¡ã¿ããŒã¿ãå€æŽããå¿ èŠããããŸãã GFSã§ã¯ããŠã£ã¶ãŒãã¯ãã®ãã£ã³ã¯ãä¿åãããµãŒããŒã®1ã€ã«ãã£ã³ã¯ïŒãªãŒã¹ïŒãæäŸããŸãã ãã®ãããªãµãŒããŒã¯ããã©ã€ããªã¬ããªã«ãšåŒã°ããŸãã æ®ãã®ã¬ããªã«ã¯ã»ã«ã³ããªãšããŠå®£èšãããŸãã ãã©ã€ããªã¬ããªã«ã¯ãã£ã³ã¯å ã®é£ç¶ããå€æŽãåéãããããã®å€æŽãçºçãããšãã¹ãŠã®ã¬ããªã«ã¯ãã®ã·ãŒã±ã³ã¹ã«åŸããŸãã
ãã£ã³ã¯ã®æææš©ã®ã¡ã«ããºã ã¯ããã¹ã¿ãŒã®è² è·ãæå°éã«æããããã«èšèšãããŠããŸãã ã¡ã¢ãªãå²ãåœãŠããšããæåã«60ç§åŸ æ©ããŸãã ãããŠããã©ã€ããªã¬ããªã«ãå¿ èŠãªå Žåããã¹ã¿ã«ãã®ééãæ¡åŒµããããèŠæ±ã§ããååãšããŠè¯å®çãªåçãåãåããŸãã ãã®åŸ æ©æéäžããŠã£ã¶ãŒãã¯å€æŽãå ã«æ»ãããšãã§ããŸãã
ããŒã¿ãèšé²ããããã»ã¹ã詳现ã«æ€èšããŠãã ããã å³ã®ã¹ãããã§ç€ºãããŠããŸãããã·ã³ã¹ããªãŒã ã¯å¶åŸ¡ãããŒãšå€ªåã®ããŒã¿ãããŒã«å¯Ÿå¿ããŠããŸãã

ãã®ã°ã©ãã£ãã¯ãå ã®èšäºããåãããŠããŸãã
- ã¯ã©ã€ã¢ã³ãã¯ãã©ã®ãã£ã³ã¯ãµãŒããŒããã£ã³ã¯ãææãããã®ãã£ã³ã¯ãä»ã®ã¬ããªã«ã®ã©ãã«ãããããŠã£ã¶ãŒãã«å°ããŸãã å¿ èŠã«å¿ããŠããã¹ã¿ãŒã¯ææããŠãã誰ãã«ãã£ã³ã¯ãæž¡ããŸãã
- ãã¹ã¿ãŒã¯ãã©ã€ããªã¬ããªã«ã§å¿çããæ®ãã®ïŒã»ã«ã³ããªïŒã¬ããªã«ã§å¿çããŸãã ã¯ã©ã€ã¢ã³ãã¯ãã®ããŒã¿ãããã«åŠçããããã«ä¿åããŸãã ããã§ããã©ã€ããªã¬ããªã«ãå©çšã§ããªããªã£ãå Žåã«ã®ã¿ãã¯ã©ã€ã¢ã³ãã¯ãã¹ã¿ãŒãšéä¿¡ããå¿ èŠããããŸãã
- 次ã«ãã¯ã©ã€ã¢ã³ãã¯ãã¹ãŠã®ã¬ããªã«ã«ããŒã¿ãéä¿¡ããŸãã 圌ã¯ãããã©ã³ãã ãªé åºã§è¡ãããšãã§ããŸãã åãã£ã³ã¯ãµãŒããŒã¯ãå¿ èŠã«ãªããæéåãã«ãªããŸã§ç¹å¥ãªãããã¡ãŒã«ä¿åããŸãã
- ãã¹ãŠã®ã¬ããªã«ããã®ããŒã¿ãåãå ¥ãããšãã¯ã©ã€ã¢ã³ãã¯ãã©ã€ããªã¬ããªã«ã«æžã蟌ã¿èŠæ±ãéä¿¡ããŸãã ãã®èŠæ±ã«ã¯ãã¹ããã3ã§éä¿¡ãããããŒã¿ã®IDãå«ãŸããŠããŸãããã©ã€ããªã¬ããªã«ã¯ãåä¿¡ãããã¹ãŠã®å€æŽãå®è¡ããé åºãèšå®ããŸããè€æ°ã®ã¯ã©ã€ã¢ã³ããã䞊è¡ããŠå®è¡ãããå ŽåããããŸãã ãããŠããããã®å€æŽããã®ç¹å®ã®é åºã§ããŒã«ã«ã«å®è¡ããŸãã
- ãã©ã€ããªã¬ããªã«ã¯ãæžã蟌ã¿èŠæ±ããã¹ãŠã®ã»ã«ã³ããªã¬ããªã«ã«è»¢éããŸãã åã»ã«ã³ããªã¬ããªã«ã¯ããã©ã€ããªã¬ããªã«ã§æå®ãããé åºã§ãããã®å€æŽãå®è¡ããŸãã
- ã»ã«ã³ããªã¬ããªã«ã¯ããããã®æäœãæ£åžžã«å®äºããããšãå ±åããŸãã
- ãã©ã€ããªã¬ããªã«ã¯ãã¯ã©ã€ã¢ã³ãã«å¿çãéä¿¡ããŸãã ã¬ããªã«ã§çºçãããšã©ãŒãã¯ã©ã€ã¢ã³ãã«éä¿¡ãããŸãã ãã©ã€ããªã¬ããªã«ã§ã®èšé²äžã«ãšã©ãŒãçºçããå Žåãã»ã«ã³ããªã¬ããªã«ãžã®èšé²ã¯çºçããŸãããããã§ãªãå Žåããã©ã€ããªã¬ããªã«ãšã»ã«ã³ããªã¬ããªã«ã®ãµãã»ããã§èšé²ãçºçããŸããã ãã®å Žåãã¯ã©ã€ã¢ã³ãã¯ãšã©ãŒãåŠçãã次ã«ãããã©ããããã決å®ããŸãã
äžèšã®äŸã¯ãäœæè ãããŒã¿ã¹ããªãŒã ãšå¶åŸ¡ã¹ããªãŒã ãåé¢ããããšã瀺ããŠããŸãã å¶åŸ¡ãããŒããã©ã€ããªã¬ããªã«ã®ã¿ã«è¡ãå ŽåãããŒã¿ãããŒã¯ãã¹ãŠã®ã¬ããªã«ã«è¡ããŸãã ããã¯ããããã¯ãŒã¯ã§ããã«ããã¯ãçºçããããšãåé¿ãããã®ä»£ããã«åãã·ã³ã®åž¯åå¹ ãåºã䜿çšããããã«è¡ãããŸãã ãŸããããã«ããã¯ãšéè² è·æ¥ç¶ãåé¿ããããã«ããããã¯ãŒã¯ããããžã«å¿ããŠãæãè¿ããã€ããŒãžã®äŒéæ¹åŒã䜿çšãããŸãã ã¯ã©ã€ã¢ã³ããããŒã¿ããã£ã³ã¯ãµãŒããŒS1 ã...ã S4ã«éä¿¡ãããšä»®å®ããŸãã ã¯ã©ã€ã¢ã³ãã¯ãæãè¿ããµãŒããŒã«ããŒã¿ãéä¿¡ããŸãïŒ S1ãšããŸãïŒã 次ã«ãæãè¿ããµãŒããŒã«è»¢éããŸãïŒ S2ãšããŸãïŒã 次ã«ã S2ã¯ããããæãè¿ãS3ãŸãã¯S4ã«éä¿¡ããŸãã
ãŸãã TCPãä»ããéä¿¡ããŒã¿ã®ãã±ããã®ãã€ãã©ã€ã³åã䜿çšããããšã«ãããé 延ãæå°éã«æããããŸã ã ã€ãŸãããã£ã³ã¯ãµãŒããŒãããŒã¿ã®äžéšãåä¿¡ãããšããã«ãããŒã¿ã®éä¿¡ãéå§ããŸãã ãããã¯ãŒã¯ã®èŒ»èŒ³ããªãå Žåã Rã¬ããªã«ããšã«Bãã€ãã®ããŒã¿ãéä¿¡ããçæ³çãªæéã¯B / T + RLã«ãªããŸããããã§ã Tã¯ãããã¯ãŒã¯åž¯åå¹ ã§ã Lã¯2ã€ã®ãã·ã³éã§1ãã€ããéä¿¡ãããšãã®é 延ã§ãã
GFSã¯ãããŒã¿ããã¡ã€ã«ã«ã¢ãããã¯ã«è¿œå ãããªã©ã®æäœããµããŒãããŸãã éåžžããã¡ã€ã«ã«ããŒã¿ãæžã蟌ããšãããã®ããŒã¿ãšãªãã»ããã瀺ããŸãã è€æ°ã®ã¯ã©ã€ã¢ã³ããåæ§ã®æäœãå®è¡ããå Žåããããã®æäœãåé 眮ããããšã¯ã§ããŸããïŒèª€ã£ãæäœã«ã€ãªããå¯èœæ§ããããŸãïŒã ããŒã¿ããã¡ã€ã«ã«è¿œå ããã ãã®å Žåããã®å Žåã¯ããŒã¿èªäœã®ã¿ãæå®ããŸãã GFSã¯ãã¢ãããã¯æäœã«ãã£ãŠããããè¿œå ããŸãã äžè¬çã«ãã»ã«ã³ããªã¬ããªã«ã®1ã€ã§æäœã倱æããå Žåã GFSã¯ãšã©ãŒãè¿ããããŒã¿ã¯ã¬ããªã«ããšã«ç°ãªããŸãã
GFSã®ãã1ã€ã®èå³æ·±ãç¹ã¯ãã·ã¹ãã ã®æäœãã»ãšãã©äžæããããšãªããã»ãŒç¬æã«äœæããããã¡ã€ã«ãŸãã¯ãã£ã¬ã¯ããªããªãŒã®ããã¯ã¢ããïŒã¹ãããã·ã§ãããšãèšããŸãïŒã§ãã ããã¯ã ã³ããŒãªã³ã©ã€ããšåæ§ã®ãã¯ãããžãŒã«ãã£ãŠå®çŸãããŸã ã ãŠãŒã¶ãŒã¯ãã®æ©èœã䜿çšããŠãããŒã¿åå²ãäœæããããäžéç¹ãšããŠãããçš®ã®å®éšãéå§ããŸãã
ãŠã£ã¶ãŒãæäœ
ãã¹ã¿ãŒã¯ãã·ã¹ãã å ã®éèŠãªãªã³ã¯ã§ãã 圌ã¯ãã£ã³ã¯ã®ã¬ããªã«ã管çããŸããé 眮ã«é¢ãã決å®ãè¡ããæ°ãããã£ã³ã¯ãäœæããã·ã¹ãã å ã®ããŸããŸãªã¢ã¯ãã£ããã£ã調æŽããŠãã£ã³ã¯ãå®å šã«è€è£œãããã£ã³ã¯ãµãŒããŒã®è² è·ãåæ£ããæªäœ¿çšã®ãªãœãŒã¹ãæ§ç¯ããŸãã
ã»ãšãã©ã®ãã¡ã€ã«ã·ã¹ãã ãšã¯ç°ãªãã GFSã¯ãã¡ã€ã«ã®æ§æããã£ã¬ã¯ããªã«ä¿åããŸããã GFSã¯ãåãã¹ãã¡ã¿ããŒã¿ã«ãããããããŒãã«ãšããŠããŒã ã¹ããŒã¹ãè«ççã«è¡šããŸãã ãã®ãããªããŒãã«ã¯ãããŠçŽ ïŒãããã®ãŸãã«ãã¹ã®èŸæžïŒã®åœ¢ã§ã¡ã¢ãªã«å¹æçã«ä¿åã§ããŸãã ãã®ããªãŒã®åé ç¹ïŒãã¡ã€ã«ãŸãã¯ãã£ã¬ã¯ããªãžã®çµ¶å¯Ÿãã¹ã«å¯Ÿå¿ïŒã«ã¯ãããã¯ãèªã¿æžãããããã®å¯Ÿå¿ããããŒã¿ããããŸãã åãŠã£ã¶ãŒãæäœã«ã¯ãããã€ãã®ããã¯ãå¿ èŠã§ãã ãã®æç¹ã§ãã·ã¹ãã ã¯èªã¿åã/æžã蟌ã¿ããã¯ã䜿çšããŸãã éåžžãæäœã/d1/d2/.../dn/leafã§æ©èœããå Žåã / d1ã/ d1 / d2ã...ãd1 / d2 /.../ dnããã³ããã¯ã«èªã¿åãããã¯ãèšå®ããŸãã d1 / d2 /.../ dn / leafã«å¯Ÿããèªã¿åããŸãã¯æžã蟌ã¿çšã ãã®å Žåã ãªãŒãã¯ãã£ã¬ã¯ããªãŸãã¯ãã¡ã€ã«ã®ããããã§ãã
ããã¯ã¢ãã/ home / userãã/ save / userã®éãããã¯ã¡ã«ããºã ããã¡ã€ã«/ home / user / fooã®äœæãé²ãæ¹æ³ã®äŸã瀺ããŸãããã ããã¯ã¢ããæäœã¯ã / homeããã³/ saveã«èªã¿åãããã¯ãèšå®ãã / home / userããã³/ save / userã«æžã蟌ã¿ããã¯ãèšå®ããŸã ã ãã¡ã€ã«äœææäœã«ã¯ã / homeããã³/ home / userã®èªã¿åãããã¯ãšã / home / user / fooã®æžã蟌ã¿ããã¯ãå¿ èŠã§ãã ãããã£ãŠã / home / userã«ç«¶åããããã¯ãããããã2çªç®ã®æäœã¯æåã®æäœãå®äºãããŸã§å®è¡ãããŸããã ãã¡ã€ã«ãäœæãããšãã芪ãã£ã¬ã¯ããªã®æžã蟌ã¿ããã¯ã¯äžèŠã§ãèªã¿åãããã¯ã®ã¿ãå¿ èŠã§ããããã«ããããã®ãã£ã¬ã¯ããªãåé€ãããªããªããŸãã
GFSã¯ã©ã¹ã¿ãŒã¯é«åºŠã«åæ£ãããéå±€åãããŠããŸãã éåžžããã®ãããªã¯ã©ã¹ã¿ãŒã«ã¯ãç°ãªãã©ãã¯ã«é 眮ãããæ°çŸã®ãã£ã³ã¯ãµãŒããŒããããŸãã ãããã®ãµãŒããŒã¯ãäžè¬çã«èšãã°ãåãã©ãã¯ãŸãã¯å¥ã®ã©ãã¯ã«ããå€æ°ã®ã¯ã©ã€ã¢ã³ããå©çšã§ããŸãã ç°ãªãã©ãã¯ã®2å°ã®ãã·ã³éã®æ¥ç¶ã¯ã1ã€ä»¥äžã®ã¹ã€ãããçµç±ã§ããŸãã ãã«ãã¬ãã«é ä¿¡ã¯ãä¿¡é Œæ§ãé«ããã¹ã±ãŒã©ãã«ã§æé ãªäŸ¡æ Œã®ããŒã¿é ä¿¡ã®ããã®éåžžã«è€éãªã¿ã¹ã¯ã§ãã
ã¬ããªã«ãã±ãŒã·ã§ã³ããªã·ãŒã¯ãããŒã¿ã®ä¿¡é Œæ§ãšå¯çšæ§ãæ倧åãããããã¯ãŒã¯åž¯åå¹ ã®äœ¿çšãæ倧åããããããã£ãæºããããšããŸãã ã¬ããªã«ã¯ãç°ãªããã©ã€ããŸãã¯ç°ãªããã·ã³ã ãã§ãªããç°ãªãã©ãã¯ã«ãé 眮ããå¿ èŠããããŸãã ããã«ãããã©ãã¯å šäœãç Žæãããããããã¯ãŒã¯ããåæããããããå Žåã§ãããã£ã³ã¯ã«ã¢ã¯ã»ã¹ã§ããŸãã ãã®é 眮ã§ã¯ãèªã¿åãã¯ãããã¯ãŒã¯åž¯åå¹ ãšã»ãŒçãããªããŸãããèšé²äžã®ããŒã¿ã¹ããªãŒã ã¯ããŸããŸãªã©ãã¯ãééããå¿ èŠããããŸãã
ãã¹ã¿ãŒããã£ã³ã¯ãäœæãããšããã¬ããªã«ãé 眮ããå ŽæãéžæããŸãã ããã«ã¯ããã€ãã®èŠå ããããŸãã
- å¹³åãã£ã¹ã¯è² è·ãæå°ã®ãã£ã³ã¯ãµãŒããŒã«æ°ããã¬ããªã«ãé 眮ããããšããå§ãããŸãã ããã«ãããæéã®çµéãšãšãã«ãç°ãªããµãŒããŒã®ãã£ã¹ã¯äœ¿çšçãåçåãããŸãã
- åãã£ã³ã¯ãµãŒããŒã§æ°ããäœæããããã£ã³ã¯ã®æ°ãå¶éããããšããå§ãããŸãã ãã£ã³ã¯ã®äœæèªäœã¯è¿ éãªæäœã§ãããšããäºå®ã«ããããããããã®ãã£ã³ã¯ãžã®ãã®åŸã®ããŒã¿ã®èšé²ã䌎ããŸãããããã¯ãã§ã«å°é£ãªæäœã§ãããããã«ããã·ã¹ãã ã®ããŸããŸãªéšåãžã®ããŒã¿ãã©ãã£ãã¯ã®éã«äžåè¡¡ãçããå¯èœæ§ããããŸãã
- äžèšã®ããã«ããã£ã³ã¯ãç°ãªãã©ãã¯ã«åæ£ããããšãæãŸããã§ãã
ã¬ããªã«ã®æ°ããŠãŒã¶ãŒãèšå®ããå€ãäžåããšããã¹ã¿ãŒã¯ãã£ã³ã¯ãåã³è€è£œããŸãã ããã¯ãããã€ãã®çç±ã§çºçããå¯èœæ§ããããŸãããã£ã³ã¯ãµãŒããŒã䜿çšã§ããªããªã£ãããã£ã¹ã¯ã®1ã€ãæ éããããŸãã¯ã¬ããªã«ã®æ°ãèšå®ããå€ãå¢å ããã è€è£œããå¿ èŠãããåãã£ã³ã¯ã«ã¯åªå é äœãäžããããŸããããããããã€ãã®èŠå ã«äŸåããŸãã ãŸããã¬ããªã«ã®æ°ãæãå°ãªããã£ã³ã¯ã®åªå é äœãé«ããªããŸãã 第äºã«ãã¢ããªã±ãŒã·ã§ã³å®è¡ã®ä¿¡é Œæ§ãé«ããããã«ãã¯ã©ã€ã¢ã³ãã®äœæ¥ã®é²è¡ããããã¯ãããã£ã³ã¯ã®åªå é äœ
ãŠã£ã¶ãŒãã¯ãåªå 床ãæãé«ããã£ã³ã¯ãéžæããŠã³ããŒãããã£ã³ã¯ãµãŒããŒã®1ã€ã«æ瀺ãäžããå©çšå¯èœãªã¬ããªã«ããã³ããŒããŸãã æ°ããã¬ããªã«ã¯ãäœææãšåãçç±ã§é 眮ãããŸãã
åäœäžããã¹ã¿ãŒã¯åžžã«ã¬ããªã«ã®ãã©ã³ã¹ãåããŸãã ã·ã¹ãã å ã®ã¬ããªã«ã®ååžã«å¿ããŠãã¬ããªã«ã移åããŠãã£ã¹ã¯äœ¿çšçãšè² è·åæ£ãåçåããŸãã ãŸãããã¹ã¿ãŒã¯ã©ã®ã¬ããªã«ãåé€ãããã決å®ããå¿ èŠããããŸãã ååãšããŠãããŒããã©ã€ãã®ç©ºã容éãæãå°ãªããã£ã³ã¯ãµãŒããŒã«ããã¬ããªã«ã¯åé€ãããŸãã
ãŠã£ã¶ãŒãã«ãããã1ã€ã®éèŠãªæ©èœã¯ãã¬ããŒãžã³ã¬ã¯ã·ã§ã³ã§ãã ãã¡ã€ã«ãåé€ãããšãã GFSã¯ç©ºããã£ã¹ã¯å®¹éãããã«æ»ãå¿ èŠã¯ãããŸããã ããã¯ããã£ã³ã¯ã®ã¬ãã«ãšãã¡ã€ã«ã¬ãã«ã®äž¡æ¹ã§çºçããéåžžã®ã¬ããŒãžã³ã¬ã¯ã·ã§ã³äžã«è¡ãããŸãã èè ã¯ããã®ã¢ãããŒãã«ããã·ã¹ãã ãããã·ã³ãã«ã§ä¿¡é Œæ§ãé«ããªããšèããŠããŸãã
ã¢ããªã±ãŒã·ã§ã³ããã¡ã€ã«ãåé€ãããšããŠã£ã¶ãŒãã¯ä»ã®å€ãã®ãã¡ã€ã«ãšåæ§ã«ããã®äºå®ããã°ã«èšé²ããŸãã ãã ãã解æŸããããªãœãŒã¹ãããã«åŸ©å ããå¿ èŠã¯ãªãããã¡ã€ã«ã®ååãå€æŽãããã ãã§ããã¡ã€ã«åã«åé€æéãè¿œå ããããŠãŒã¶ãŒã«ã¯èŠããªããªããŸãã ãŸãããŠã£ã¶ãŒãã¯ããã¡ã€ã«ã·ã¹ãã åå空éã®å®æçãªã¹ãã£ã³äžã«ã3æ¥ä»¥äžåã«ãŠãŒã¶ãŒã«ãã£ãŠåé€ããããã¹ãŠã®é ããã¡ã€ã«ãåé€ããŸãïŒãã®ééã¯æ§æãããŠããŸãïŒã ãããŸã§ã¯ããã¡ã€ã«ã¯ã·ã¹ãã ã«é ããããŸãŸã§ããããªã«ããªã®ããã«èªã¿åããŸãã¯ååãå€æŽã§ããŸãã ãŠã£ã¶ãŒãã«ãã£ãŠé衚瀺ã®ãã¡ã€ã«ãåé€ããããšãããã«é¢ããæ å ±ãã¡ã¿ããŒã¿ããåé€ããããã®ãã¡ã€ã«ã®ãã¹ãŠã®ãã£ã³ã¯ãããããåãé¢ãããŸãã
ãã¡ã€ã«åå空éã®éåžžã®ã¹ãã£ã³ã«å ããŠããŠã£ã¶ãŒãã¯ãã£ã³ã¯åå空éã®åæ§ã®ã¹ãã£ã³ãå®è¡ããŸãã ãŠã£ã¶ãŒãã¯ããã¡ã€ã«ããåæããããã£ã³ã¯ãå€å¥ããã¡ã¿ããŒã¿ããåé€ããŸãããã£ã³ã¯ãµãŒããŒãšã®éåžžã®éä¿¡äžã«ãæå®ããããã£ã³ã¯ãå«ããã¹ãŠã®ã¬ããªã«ãåé€ããå¯èœæ§ã«ã€ããŠã®ä¿¡å·ãéä¿¡ããŸãã ã¬ããŒãžã³ã¬ã¯ã·ã§ã³ãžã®ãã®ã¢ãããŒãã«ã¯å€ãã®å©ç¹ããããŸããã1ã€ã®æ¬ ç¹ããããŸããã·ã¹ãã å ã®å Žæããªããªã£ãŠãåé€ã延æãããšãç©ççã«åé€ããããŸã§æªäœ¿çšã¹ããŒã¹ãå¢å ããŸãã ãã ããåé€ãããããŒã¿ãå埩ããå¯èœæ§ãåé€äžã®æè»ãªè² è·åæ£ã®å¯èœæ§ãããã³èª€åäœã®å Žåã«ã·ã¹ãã ã埩å ããæ©èœããããŸãã
èã¯ã©ãã·ã¥æ§ãšãšã©ãŒèšºæ
ã·ã¹ãã ã®äœæè ã¯ãæãé£ããåé¡ã®1ã€ã¯ã·ã¹ãã ã³ã³ããŒãã³ãã®é »ç¹ãªé害ã§ãããšèããŠããŸãã ã³ã³ããŒãã³ãã®éãšå質ã«ããããããã®é害ã¯åãªãäŸå€ã§ã¯ãªããæšæºã«ãªããŸãã ã³ã³ããŒãã³ãé害ã¯ããã®ã³ã³ããŒãã³ããžã®ã¢ã¯ã»ã¹äžèœããŸãã¯ããã«æªãããšã«ãç ŽæããããŒã¿ã®ååšã«ãã£ãŠåŒãèµ·ããããå¯èœæ§ããããŸãã GFSã¯ãé«éãªã«ããªãšã¬ããªã±ãŒã·ã§ã³ãšãã2ã€ã®ã·ã³ãã«ãªæŠç¥ã§ã·ã¹ãã ã®çšŒåãç¶æããŸãã
å®éãé«éãªã«ããªãšã¯ããã·ã³ãåèµ·åããããšã§ãã åæã«ãèµ·åæéãéåžžã«çããããå°ããªåé¡ãçºçããŸãããäœæ¥ã¯æ£åžžã«ç¶è¡ãããŸãã ãã£ã³ã¯è€è£œã«ã€ããŠã¯äžèšã§èª¬æããŸããã ã¬ããªã«ã®1ã€ã䜿çšã§ããªããªã£ãå ŽåããŸãã¯ãã£ã³ã¯ã¬ããªã«ãå«ãããŒã¿ãç Žæããå Žåããã¹ã¿ãŒã¯ãã£ã³ã¯ãè€è£œããŸãã ç Žæãããã£ã³ã¯ã¯ããã§ãã¯ãµã ãèšç®ããããšã§æ±ºå®ãããŸãã
ã·ã¹ãã ã§ã®ã¬ããªã±ãŒã·ã§ã³ã®ãã1ã€ã®ã¿ã€ãã¯ãã»ãšãã©èšåãããŠããŸãããããã¹ã¿ãŒã¬ããªã±ãŒã·ã§ã³ã§ãã æäœãã°ãšãã§ãã¯ãã€ã³ããè€è£œãããŸãã ã·ã¹ãã å ã®ãã¡ã€ã«ã®åå€æŽã¯ãæäœãã°ããã¹ã¿ãŒã«ãã£ãŠãã£ã¹ã¯ã«æžã蟌ãŸããåŸãããã³ãã°ãã¬ããªã±ãŒãããããã·ã³ã®ãã£ã¹ã¯ã«ã®ã¿çºçããŸãã å°ããªåé¡ãçºçããå ŽåããŠã£ã¶ãŒããåèµ·åããå ŽåããããŸãã ããŒããã©ã€ããŸãã¯ãŠã£ã¶ãŒãã®ä»ã®éèŠãªã€ã³ãã©ã¹ãã©ã¯ãã£ã«åé¡ãããå ŽåãGFSã¯ããŠã£ã¶ãŒãããŒã¿ãè€è£œããããã·ã³ã®1ã€ã§æ°ãããŠã£ã¶ãŒããéå§ããŸãã ã¯ã©ã€ã¢ã³ãã¯DNSãä»ããŠãŠã£ã¶ãŒãã«ã¢ã¯ã»ã¹ããDNSã¯æ°ãããã·ã³ã«åå²ãåœãŠã§ããŸãã æ°ãããã¹ã¿ãŒã¯ãæ£ç¢ºãªã³ããŒã§ã¯ãªããå€ããã®ã®åœ±ã§ãã ãããã£ãŠããã¡ã€ã«ãžã®èªã¿åãå°çšã¢ã¯ã»ã¹ããããŸãã ã€ãŸãã圌ã¯æ¬æ Œçãªãã¹ã¿ãŒã«ã¯ãªããããã¹ã¿ãŒã®æäœããã³ãã®ä»ã®æ§é ã®ãã°ã®ã¿ãç¶æããŸãã
ã·ã¹ãã ã®éèŠãªéšåã¯ãããŒã¿ã®æŽåæ§ãç¶æããæ©èœã§ãã éåžžã®GFSã¯ã©ã¹ã¿ãŒã¯ãæ°åå°ã®ããŒããã£ã¹ã¯ãåããæ°çŸå°ã®ãã·ã³ã§æ§æãããŠããããããã®ãã£ã¹ã¯ã¯ããããŸããã»ã©ã®å®å®æ§ã§æ éããããŒã¿ã®ç Žæã«ã€ãªãããŸãã ã·ã¹ãã ã¯ã¬ããªã±ãŒã·ã§ã³ã䜿çšããŠããŒã¿ãå埩ã§ããŸããããã®ããã«ã¯ããŒã¿ãå£åããŠãããã©ãããç解ããå¿ èŠããããŸãã ç°ãªããã£ã³ã¯ãµãŒããŒäžã®ç°ãªãã¬ããªã«ã®åçŽãªæ¯èŒã¯éå¹ççã§ãã ããã«ãç°ãªãã¬ããªã«éã§ããŒã¿ã®äžæŽåãçºçããããŒã¿ã®éããçããå¯èœæ§ããããŸãã ãããã£ãŠãåãã£ã³ã¯ãµãŒããŒã¯ãããŒã¿ã®æŽåæ§ãåå¥ã«å€æããå¿ èŠããããŸãã
åãã£ã³ã¯ã¯ãé·ãã64 Kãã€ãã®ãããã¯ã«åå²ãããŸãã ãã®ãããªåãããã¯ã¯ã 32ãããã®ãã§ãã¯ãµã ã«å¯Ÿå¿ããŠããŸãã ä»ã®ã¡ã¿ããŒã¿ãšåæ§ã«ããããã®éã¯ã¡ã¢ãªã«ä¿åããããŠãŒã¶ãŒããŒã¿ãšã¯å¥ã«å®æçã«ãã°ã«ä¿åãããŸãã
ããŒã¿ãèªã¿åãåã«ããã£ã³ã¯ãµãŒããŒã¯ããŠãŒã¶ãŒãŸãã¯å¥ã®ãã£ã³ã¯ãµãŒããŒã«ãã£ãŠèŠæ±ãããããŒã¿ãšäº€å·®ãããã£ã³ã¯ãããã¯ã®ãã§ãã¯ãµã ããã§ãã¯ããŸãã ã€ãŸãããã£ã³ã¯ãµãŒããŒã¯ç ŽæããããŒã¿ãé åžããŸããã ãã§ãã¯ãµã ãäžèŽããªãå Žåããã£ã³ã¯ãµãŒããŒã¯èŠæ±ãéä¿¡ãããã·ã³ã«ãšã©ãŒãè¿ãããã¹ã¿ãŒã«å ±åããŸãã ãŠãŒã¶ãŒã¯å¥ã®ã¬ããªã«ããããŒã¿ãèªã¿åãããšãã§ãããŠã£ã¶ãŒãã¯å¥ã®ã¬ããªã«ã®ããŒã¿ããå¥ã®ã³ããŒãäœæããŸãã ãã®åŸããŠã£ã¶ãŒãã¯ãã®ç Žæããã¬ããªã«ãåé€ããããã«ãã®ãã£ã³ã¯ãµãŒããŒã«æ瀺ããŸãã
æ°ããããŒã¿ãè¿œå ããå Žåããã§ãã¯ãµã ã®æ€èšŒã¯è¡ãããããããã¯ã®æ°ãããã§ãã¯ãµã ãæžã蟌ãŸããŸãã ãã£ã¹ã¯ãç ŽæããŠããå Žåããã®ããŒã¿ãèªã¿åãããšãããšãã«å€å¥ãããŸãã ãããã®ãããã¯ã®ããŒã¿ã®äžéšã¯äžæžãããããæŽåæ§ããã§ãã¯ããå¿ èŠããããããèšé²æã«ã¯ããã£ã³ã¯ãµãŒããŒã¯èšé²ãè¡ãããå¢çãšäº€å·®ããæåãšæåŸã®ãããã¯ã®ã¿ãæ¯èŒããŸãã