Optimizing Active Database Transactions Using an Extended Multiversion Concurrency Control Protocol
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(2) INSTITUT NATIONAL DE RECHERCHE EN INFORMATIQUE ET EN AUTOMATIQUE. Optimizing Active Database Transactions Using an Extended Multiversion Concurrency Control Protocol Dimitri Tombroff, Francois Llirbat, Eric Simon. N 2519 Mars 1995. PROGRAMME 1. ISSN 0249-6399. apport de recherche.
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(232) y±± jrcn\"n;®\rj }¸y{k\qkpª 0 AA5@)D2zlxbnpz:wk\jljrc}~bkUbg}zk-zxgr(}bnp~b}xgk\zºjr~gjrc}rhzrc h3zxgrhk\zzrc ±ygrÍy{EÉ/ymU|gjr§sU¶Ä½?xQ|b} /zxgrf~bkQ}}yh{r'wk\ gyKwz })k\ 0AA5@D)24o°nX'k\h{ kgww|gjCµrz¹
(233) rr 3 @ bnpb C bnpb yK}!gkUzCwnp~bnph{rFkªÄh{kgw²Uy{gmzxgrc}r-zj nb}n\wzy{k\b}¶ Ég|gjlzxgrjo"k\jlr\
(234) zxgr3npbkp®\r'rgrcw|gzy{k\>yK}Swk\jjrcwz»n\}qªnpj»n\}}rjyKnX±y cnzy{k\>yK}Swk\bwrjgrc$¶ ½/j npb}n\wzykU @
(235) ¹!xhyKwlxwkUo"o)y{z }fbrª_k\jr¦zxgr3zjy{m\mUrj~bnpjzkpª }z npjz})yK}»}rjyKnX±y rc brª_k\jr ¶b½/j npb}ln\wzy{k\b} 3 npb C g¹!xhyKwx'wk\o"o)y{z-nXª_zrj
(236) zxgrFzjymUm\rj!~bnpjz
(237) kpª }z npjlz } npjrF}rjyKnX±y rc'nXª_zrj brcwnp|b}rFzxgr»wk\oqo)y{zCnXª_zrj nUw¿\|hy{jrcSnX± y{z }º{kwl²g}¶ +kp¹
(238) r®\rjc µzxgr)|b}npm\r)kpª!»Å-\iºÆzko"kUhyzlk\j-zxgr)zjy{m\m\rj-~bnjz }(kpª
(239) |g~*gnpzrqzj npb}nUw¯ zy{k\b}4wnp3j nXyK}rf}k\o"r"~gjlk\h{ro°}¶É/y{j }zc gk\zlrzlxgr)y{o"~bk\jlz npbwrfkpª:k\|gj)n\}}|goq~gzy{k\3zxbnpz nX±zjymUm\rj }!npjlrFhrªÇrjjlrc$¶ \|g~g~µkQ}r)zxbnpz yK}Cwlxbnpgm\rcÍzk"~brjªÇk\jlo }r®\rj n y{b}rjz }?y{Qzk qH24BD *5C
(240) F µnpbzxgr-zljy{m\m\rj
(241) yK}(hr¾bgrc§nU}
(242) y{o"o"rcUyKnpzlr\¶*½
(243) xgr zxgrFzjymUm\rjCnpbÍzxgrF~gjkU¯ m\j no ~bnjz }kªÄzxgr(zj nb}n\wzy{k\npjr+y{QzrjrcnX®\rc$¶µ½
(244) xhyK}
(245) o"rcnpb}
(246) zlxbnpz!nFgr¹¼y{zro wkU|hÃÍbr ¹!jy{zr¯M{kgw²UrcnXªÇzlrjGzxgr+¾bj }z
(247) zjy{m\mUrjG~bnpjzºkpª nb°n4}rjyKnX±y cnpzy{k\ªnp|h{z
(248) o)y{m\xhz:kgww|gjºy±ª nFwkUbw|gjjrhz:zlj npb}n\wzykU Q}nX J hrgrcw|gzrc}
(249) npb"¹+jy{zrc}ºbk\zx > 24B) *5C npbI 0 AA5@)D2 n\}!}xgk¹+k\§É/y{m\|gjr)g¶b½
(250) xgr4rchm\rc}
(251) kpªGzlxgrF}rjyKnX±y cnpzy{k\3m\jnp~gx c Ãnbr±{rc3¹
(252) y{zxzlxgr-y{zro zxbnpzfwnp|b}rc}fnÔwk\ gyKwzc
(253) npjr'}xgkp¹!¨y{ÊzxhyK})¾bm\|gjlr\¶:½
(254) xh|b} Gnzlxgk\|gm\xEzlxgr§}ro°nQzyKw}qkpª û ëå K ú ÿ Rcë-ú_&è RXú_è _èôæMåç8ô KCæ_ëXè _èúMåÿ å ÿæMåçêô)ê ú_éXèúêl÷bæ_úÿô ÿ æMåçêô å éX è ôcèé(åçôFáè æMåçê ô. . . . . -. . . . . . . -. -. . . .. . . -. !. %. . -. . &. !. . . &. -. . &. "!. -. "!. . ô îìí. -. -. . . M6M ^]8_. -. -. !. . -. -.
(255) , "%* ;$ * , $(
(256) * (. T1. T2 w(x). T3. x. w(y). T2. T1. w(z) r(x). r(y). z. y T3. r(z). /É y{m\|gjlr - 5Gk\bw|gjljrQz
(257) rgrcw|gzy{k\'kpª¥3jyzlr¯_zxgrg¯
(258) rcn\'½/j npb}n\wzykUb}¶ zxgr'zjnpb}n\wzy{k\¹
(259) k\|hK¼gk\z"µr3wxbnpgmUrchEhr¾bhygm¼zxgr»zljy{m\m\rjn\}4y{o"o"rcUyKnpzr\
(260) kU|gj k\~gzyoy cnzy{k\'k\~g~bk\jlz|ghy{zf¹
(261) k\|hKµr(kh}zc¶ 7®\r;yªbzljy{m\m\rj } njr:hrª_rjjrc$ Xzxgro°nXy{)~gjk\h{roÈ}zy±±kgww|gj¹!xgr"wk\bw|gjjrhz¥¦jy{zr¯ zxgrg¯?rcn\Szj npb}nUwzy{k\b}!npjr-rgrcw|gzrc$¶ \|g~g~bkQ}r¹
(262) r-xbnX®\r-zxgjlrrFwk\bw|gjjrhzCrgrcw|gzy{k\b} kpª|g~*gnpzr(zj nb}n\wzy{k\b} 3 @ hnpb C QnU}:hr~hyKwzrcqy{»É/y{m\|gjr - ¶ 3 jrcnUg}:n;®\rj }¸y{k\fkpª wjlrcnpzrcµrªÇkUjr @ }ybwr Cfwk\o"oyz}CnXª_zrj(zxgrFzljy{m\m\rj(~bnpjz(kpª 3 }z npjz}¶ (}¸y{gmzxgr }no"rCnpjmU|go"rQzX jrcn\g}Gn(®Urj }¸y{k\fkpª )wjrcnpzlrc"µrªÇk\jlr ¶hÉ/ybn{\ jrcn\g}ºn-®\rj}¸y{k\ kpª q~gjkh|bwrcÍQ @ C ¶gu-}
(263) zxgr-¾bmU|gjrF}xgkp¹C} gzlxgrjr(yK}Cn"wgwlC {r-y{'zxgrF}rj3 yKnX±y cnpzy{k\'m\jnp~gx npbÍrrcw|gzykUyK}!gkUzCwk\jjrcwzX¶ ¥3r-¹
(264) y±±Ä}xgkp¹Êzxbnpz
(265) ¹!xgrgr®\rjC}|bwx»n)~gjlk\h{ro kww|gj} gzxgrjr+yK}CnÀwjyzyÃwnÃÂqjrcn\µ³ ´ k\~µrj npzy{k\ÍyK}}|grcSQzlxgr-zjy{m\m\rj(~bnpjz!kªAn)zlj npb}n\wzykU >zxbnz!kww|gj}CnXª_zrjCn¹!jy{zrp³ ´ k\~µrj npzy{k\4yK}}|grc4hFn
(266) zj nb}n\wzy{k\ _ cnpb-zlxgr:zljy{m\m\rj ~bnpjlzkpª }z npjz}$¹!xhy±{r:zlxgrGzjy{m\mUrj ~bnpjlzkª yÃ}4j|gghy{gmb¶A¥3r°zlxgrjrªÇkUjr"~gjk\~µkQ}rnS~gjk\zkgwkpGzxbnpz"hhbnpo)yKwnX±{Ô~gjlr®\rQz} }|bwlx Àwjy{zyKwnXKÂ"jrcnUg}ºªÇjlk\o xbnp~g~µrhygmµ¶ D !#$ ¬,4 DE& ,+ ,FG,;9 1324 ! )5"
(267) 576 8"9-:&/# ,; % , !. . . . . . ,. . . . . . . "!. . . .. .
(268)
(269)
(270) . ¥3r;¾bj }z
(271) jrcwnX±gk\z npzykUb} ghr¾bhyzykUb} npbfjrc}|h{z }?ª_jk\o 0 ( "
(272) 2npb 0 u \!2¸¶ u gnpz nbn\}rSyK}n}rzkpªkUgrcwz}¶Gu ½ jnpb}n\wzy{k\ -yK}npÊk\jhrjrcÊ~bnXy{j'³ "!$#% ´ ¹!xgrjl&r yK}
(273) zlxgrF}rz
(274) kpªk\~µrj npzy{k\b}ºy{ ' npb( #% yK}
(275) zlxgr-rrcw|gzy{k\kUj hrj!kpªzlxgrc}r-k\~brjnp¯ zy{k\b}¶?rcn\fk\j
(276) ¹!jy{zr(k\~brjnpzy{k\b}ºrrcw|gzlrcfQ njrCgkUzrcI * 0 2bkUj 0 2¸ \jrc}~µrcwzy{®\r{\¶ ½/j npb}nUwzy{k\b}-zrjlo)y{bnpzr"ry{zxgrj)h nwkUo"o)y{z"4³ A) ºª_k\j ´!kUjnp3npµk\jz"x³ C AªÇk\j _´ ¶Æ rz +* 3 ! @ !-,.,., /10¬µr§n'}rz)kpªCzlj npb}n\wzykUb}¶ u( (* $'32 kpª yK}"nS~bnpjzyKnX!k\jhrj ³ 4!$#%5-´
(277) ¹!xgrjr yK}(zxgr}rz+kpªGk\~brjnpzy{k\b}+rrcw|gzrcÍQzlj npb}n\wzykUb}
(278) y{ 4 *npb6 #%5>yK} zxgr4rrcw|gzykU»k\j hrj+kpªÄzlxgkQ}r-k\~µrj npzy{k\b}¶ ½
(279) ¹
(280) k°xhyK}zkUjy{rc} 2 npb 2 npjr >* 87 )9 y±ªC³ yÇ´!zlxgr§npjr)hr¾bgrc'kp®\rj(zxgr }no"r§}rzqkpªFzj npb}ln\w3 zy{k\b}"npb@ ³_y±y_´Fy±ª 3 npb @ npjrz¹
(281) kÔwk\ gyKwzy{gmk\~brjnpzy{k\b}fnpb 3 # 5 D @ zxgr 3 # 5 L @ ¶u(ExhyK}zk\jl 2;: yK}
(282) $> y±ª-ª_k\j"r®\rj¨z¹
(283) k§zlj npb}n\wzykUb} ( '. (. . . . . . . . . . . . ,. . ,. ó M ó N 54.
(284) .
(285) !
(286) #"%$& '()* +,. :npb Fry{zxgrjn
(287) k\~brjnpzy{k\b}(kpª ' º~gjrcwrchr°nX±
(288) k\~brj nzy{k\b}(kpª Fk\j-®UyKwr¯_®\rj }n ¶$uC xhyK}zk\jl 2 yÃ} (8$? ( y±ª
(289) y{z-yK}-rc¿U|hy{®nX{rhz)zk»n}rjyKnXGxhyK}zkUj\¶JB!gr°hrzlrjo)y{grc}(y±ª 2 yK}°}rjyKnX±y cnhr¦QnpbnX{ ygmzlxgr $>
(290) * $&> kpª 2 gk\zrc 4³ 2 ´ ¶½
(291) xhyK})yK} n'Uy{jrcwzrcmUj np~gx¹!xgrjrgkghrc}"npjlr°zxgr»wkUo"o)y{zzrc¨zjnpb}n\wzy{k\b};y{ 2 npb¨zxgrjrfyK} nprchm\r y±ªFk\grkpª ç})k\~µrj npzy{k\¼~gjrcwrchrc}fnpbwk\ gyKwz }q¹
(292) y{zxEk\grkª ç} k\~µrj npzy{k\ ¶gu(»xhyK}zlk\j 2 yK}C}rjyKnX±y cnhryªy{z }(}rjyKnX±y cnpzy{k\'m\j np~gxfyK}!nUwwl±yKwp¶ ·¸§n)o)|h{zy{®\rj }ykU§gnpz nbn\}r\ grcn\wlx»¹+jy{zr-k\~brjnpzy{k\»kªAnpkUgrcwz ~gjlkh|bwrc}(n)gr¹ 8$4
(293) * kpª ¶!½
(294) xQ|b}qª_k\jfrcn\wlx kUgrcwz GzlxgrjrSyÃ}Sn¦±yÃ}z»kpªF®\rj}¸y{k\b}f¹!jy{zzr "! $!-,., ¹!xgrjrzlxgr»}|gb}wjy{~gzqyÃ}qzxgrfy{bhrEkpªCzlxgrzj npb}nUwzy{k\zxbnpz)¹!jkUzr°zlxgr®\rj }¸y{k\ʳzlxQ|b}
(295) jr~gjlrc}rQz}Fzlxgr"®\rj }¸y{k\¨kpª wjrcnpzrc¦Q ¸ ´ ¶$u 8$4
(296) *)
(297) * $ ³ )´!yK}4zxgr }rc¿U|grbwr°kª:k\~µrj npzy{k\b};k\'zxgr"®\rj }ykUb}-kpª
(298) k\grcwz }-}|ggo)y{zzrc Q'zj nb}n\wzy{k\b}¶67ºn\wlx ¹!jy{zr-kU~brj npzykU 0 2byK}
(299) ofnp~g~brcqy{hzk 0 2 nbfrcn\wxkU~brj npzykU * 0 2µyÃ}?o°np~g~brc¬y{Qzk *8& 0
(300) 2 ªÇkUj}kUo"r $¶$uzj nb}n\wzy{k\ $&? < ?:
(301) :H=
(302) $&* 'A y{ 2 y±ª*0 2 2 ¶ "+k\zyKwr)zxgr k\h{"wk\ gyKwzy{gm"k\~µrj npzy{k\b}Äy njr %& 0 2*npby* 0 2gª_k\jG}k\oqr ! 'b nb c¶Q½
(303) ¹
(304) k . . &. ,. !. . !. . . . ,. . . . !. . "!. ). ). . xhyK}zk\jyrc}qnpjr"rc¿U|hy{®nX{rhz"y±ªCzxgr¦xbnc®Ur"zxgr}npo"r"kU~brj npzykUb}¶uC xhyK}zk\jSyK} *
(305) : >*>
(306) $> ( yªµy{zyÃ}Arc¿\|hy{®pnX{rQz
(307) zk-nC}rjyKnXbxhyK}zk\j4kp®\rjzlxgr?}lnpo"r!}rzkpªbzjnpb}n\wzy{k\b} rgrcw|gzrcSk®Urjnf}¸y{gmp{r"®\rj }ykU§gnpz nbn\}r\¶$½
(308) xgr 8$4
(309) *
(310) $> ()* $&> kpª:n xhyK}zkUj 2 ³SÅ 4³ 2 ´´yK}-nUy{jrcwzrc'mUj np~gx'¹!xgkQ}r)gkghrc}-jr~gjlrc}rQzFwkUo"o)y{zzrc zj nb}n\wzy{k\b}¶g½
(311) xgrjlr-yK}!npSrchm\r y{§SÅ F³ 2 ´y±ª ³_y_´ * 0 2 2 ªÇk\j(}k\o"r ³zxbnpzºyK} CjrcnUg}¯M¯Mª_jk\o ' ¸´ . . ,. . ,. . . . . .. . \|bwlx§npSrchm\r-yK}-wnX±{rc'np 4³ 2 ´ÄrchmUrFy{ 0 ( "
(312) 2¶gu-gUyzykUbnXGrchm\rc}(npjrhr¾bgrc'n\} ª_kp±kp¹C}¶É k\jGrcnUwxfk\grcwz \zxgrjr+yK}!n-zlk\z nXbk\jhrjC³¸gk\zrcg´k\nX± zlj npb}n\wzykUb}zxbnpz ¹!jy{zr ¶ B!grnUgg}
(313) zxgrFrchmUr ' Czk°SÅ F³ 2 ´y 3k\gr-kpªzxgr(ªÇk{kp¹
(314) y{gmfxgkpKg}
(315) 5 ³_y±y_´Eª_k\j!}k\oqr npb U jrcn\g}¯M¯Mª_jk\o 4npb ³_y±y±y_´Gª_k\jC}kUo"r npb U -jrcn\g}¯M¯Mª_jk\o nb . . ( '. . . . . .. . .. . ½
(316) xgrc}rfn\gUy{zy{k\bnXGrchm\rc}4npjr"wnX±{rc 8$ (* * $&< 8$ >< ; ¶µuC hx yK}zlk\jSyK}(k\gr¯wk\~h }rjyKnX±y cnph{r)y±ªyz}!o)|h{zy{®\rj }¸y{k\'}rjyKnX±y cnpzy{k\'m\j n~gxfyÃ}+n\wwl±yKwq³?0 (
(317) 2_´ ¶ "!. . "!. . ' ;)(+*,(.-/( . "!$#&%" '. ( '. ¥¦rCgkp¹Ê~gjrc}rhz
(318) k\|gj 7gzrbhrc»SÅ-\iGÆS~gjk\zlkwkp gwnX±{rc#7º»Å-\iºÆ¶\·¸zxhyK}
(319) ~gjk\zkU¯ wkp µ¹:r)UyK}zy{gm\|hyK}x $&> <!: *) zj npb}nUwzy{k\b} ggk\zlrc» zj npb}nUwzy{k\b} hª_jk\o |g~$gnpzr)zj ng¯ }n\wzykUb}¶QSk\jrkp®\rjX y{z
(320) ¹
(321) y±± µrwkUQ®\rhy{rhz
(322) zkF}|g*Uy{®UyKhrF|g~*gnzrCzlj npb}n\wzykUb}y{QzlkFzj ng¯ }n\wzykUb}(zxbnpz!k\h{'xbnX®\rnq~gjk\mUj npo ~bnpjlzF³_y¶ r\¶Ã bgkj|h{r4yK}(zjy{m\m\rjlrcµ´?npbSzjnpb}n\wzy{k\b} zxbnpzfxbnX®\rbkUzx>n3~gjkUm\j npo ~bnjz¬nbEn¦zjy{m\m\rjf~bnpjzc¶º½
(323) xgrSªÇk\jlo"rj°npjr'wnX±{rcÊ¥3jy{zr zj nb}n\wzy{k\ʳgkUzrc3¥ zjnpb}n\wzy{k\b}Á´¹+xgrjrcn\})zxgrÍKnpzrj°npjlr¬wnX±{rc¼¥3jy{zr¯_zxgrg¯?rcn\ zj nb}n\wzy{k\b}+³gk\zlrcf1 ¥ 0 Ezlj npb}n\wzykUb}´ ¶gÉ/y{m\|gjrc}
(324) "npb4jrc}~µrcwzy{®\r{§}xgkp¹Êxgkp¹Êk\~br¯ j npzykUb}ºyK}}|grcSQ»ÓnpbÍ¥Bzlj npb}n\wzykUb}Cnpjlr-~gjkwrc}l}rchzxgr½/j npb}ln\wzy{k\»'npbnpm\rj ³½!¦´ ¶pu(°¼zj nb}n\wzy{k\)¾bj}zk\gz nXy{b}
(325) n
(326) $> $ gk\zrc fª_jk\o½!¨¶\½
(327) xgrfr®\rj jrcn\µ³ ´Gm\rz}
(328) zxgrFoqkQ}z!jrcwrhz(®\rj }¸y{k\Skpª xbnc®Uy{gm¬nzy{o"rc}z npoq~{rc}}+zxbnp»kUjCrc¿U|bnXzk. ô îìí. M6M ^]8_.
(329) s. , "%* ;$ * , $(
(330) * .
(331)
(332) . /. 7. :/.
(333) !"$#
(334) . %&(' *)+-, 5656&5 89 ) ,. . " *)+-,0/ 1324. ( #:; < = =
(335) >?
(336) @BA . = =
(337) C!#:1EDFHG. & 56565 9 )+-, I. /. : /*)+-,. É/y{m\|gjr4%5+7grcw|gzy{k\»kªAnp» zj nb}n\wzy{k\
(338) J: !"
(339) . /. 7. %&(' *)+-, 5656&5 89 ) ,. . 56565 XW )Y, VU7 &. /. & 56565 9 )+-,. F$(
(340) C ? #
(341) I . ?( K!LA;ME N 1 POE>?
(342) Q " K!
(343) 6 . ;C @ @ R?S : ; A N " #:T @U1 = ?(": * $ =
(344) / . V. V. . >?T
(345) ;LA!;MJ Y N 1 POE>?
(346) Q " K!
(347) 6 . ;C @ @ R?S : ; A N $( T = E>Z $ =
(348) /*Y. V. ./ . V. . W *)+-,0/ (1[24 W)X+H,_ \]^^ / ;1`K: T D = #:FK: ; = >?
(349) @a $ =
(350) E#:1EDF$ W 0)X+H, A = A!;M =. ./. /É ymU|gjr+5+7Ärcw|gzy{k\SkpªGn)¥7zj npb}nUwzy{k\ ¶
(351) rcnUg}(y{ nÍ¥ zj npb}ln\wzy{k\SªÇk{kp¹zxgr"|b}|bn Q\iºÆ~gjk\zlkwkp /¹!xgrjrcn\}4nf¹!jy{zrp³ ´ wjrcnzrc}-n"gr¹È®Urj }¸y{k\'kpª ³_y±ª yK}-¹!jyzlzrª_k\j(zxgr4¾bj }z(zy{o"rp´ ¶ (Grª_k\jr"wk\oqo)y{zzy{gmb $n ¥7zj nb}n\wzy{k\fk\gz nXy{b}ºy{z } $ ) +
(352) * # $ ³gk\zrc$ 2x/´ gn\}}kgwlyKnpzrc}
(353) zxhyK}
(354) h|go)brj(zk rcn\wlx»kª y{z }!®Urj }¸y{k\b} bnbfjr{rcn\}rc}(nX± y{z }º{kwl²g}¶ É/ymU|gjr "}xgkp¹C}
(355) xgkp¹>zlxgr-k\~brj nzy{k\b}ºyK}}|grcSh¬n)¥ 0 zj npb}nUwzy{k\b}!npjr-~gjlkwrc}}rc$¶ ½
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