The Application Study on Choosing Course System Based on JBoss. Cache of Distributed Cache Technology. Hongwu Mo

Transcription

1 Appd Mns nd Mts Onn: ISSN: , Vs , pp d: / Tns T Pubtns, Swtznd T Apptn Study n Csng Cus Systm Bsd n JBss C f Dstbutd C Tngy Hngwu M GungX Agutu Vtn-Tn Cg,GungX NnNng Cn,53007 nzymw@163.m Kywds: JBss C, tngy, us stng systm Abstt. T Wb sv dys w stng us nn n g. Adptng JBss C t nstut dstbutd mut-v f pptn sv n sv t pbm f k tugput nd spnd tm ng ffty. 1. Intdutn Mst f t us stng systm dpt BS md, t Wb pptn sv nd dtbs sv n t sm mn, w n pmss t nsstny nd ntgty. W t studnts t s us, t t f qust, f t ptn f dtbs s s xutn, w d t t qust f uss n nt gt spns f ng tm, t dy tm s ng, vn us t bws tmut. Lkng nt t unt stutn f stng uss systm, t mpv sv quty f t Wb pptn sv, t nds t mk spndng mpvmnt. T tngy [1] s t sutn, t n t dt bjt f dtbs, s n t ntmdt pssng bjt nd sut bjt. It my wk nt vy w t nstut sv, ts pp w dpt dstbutd sv ust, tt s dpt Wb pptn sv dstbutd tngy [2,3], w n g mpv t g dng pbm f unt sv, mpv t tugput f Wb sv, du t spndng tm, sv t sbty pbm f dtbs. 2. T nyss f bjt nd dsgn f g md 2.1 T systm busnss pss nyss W studnt stts t s us, fst ss t us ks n t us pg, f t studnts s ts us nt t mt, tn sussfuy ss t us, f nt must s t uss. If t studnt ss t us sussfuy, w b d t sng t pg. H ss t t ks, nd t studnts s ts t d nt t mt, t studnt s v sussfu n us sng pss, f nt, t studnt must b s t ts. Dung ft t stng us, studnts n k t v ndtn f t stng uss by sut pg t nytm, w s nvnnt t mk djustmnt. Adng t t nyss bv, w n gt t stng us pss fgu s fgu 1. A gts svd. N pt f ntnts f ts pp my b pdud tnsmttd n ny fm by ny mns wtut t wttn pmssn f Tns T Pubtns, (# , Pnnsyvn Stt Unvsty, Unvsty Pk, USA-16/09/16,06:19:53)

2 2122 Fnts f Mnuftung nd Dsgn Sn IV St Cuss Cuss St Ts Studnts T mt numb f studnts Gt Rsuts Ys Fu? N Ys Rsuts f stng uss N Fu? T mt numb f ts Ts Fgu 1 T Subsystm pss f stng us 2.2 T nyss f bjt Adng nyss, t bjt n b d n g s stng us systm nudng t fwng bjt: us nfmtn bjt, n b dt bjt, s n b pg bjt fmd by us nfmtn. T mt pp nfmtn f us, t bngs t dt bjt. T std numb nfmtn f ts us, t bngs t dt bjt. T t nfmtn bjt, ts n b dt bjt s n b pg nfmtn fmd by t nfmtn. T nfmtn f t s mt numb, t bngs t dt bjt. T std pp f t, t bngs t dt bjt. T nfmtn f std us, t n b dt bjt pg bjt f sut fmd. S t nusn s tt ts mssg n b stg n t fm f dt bjt. 2.3 T ssftn f bjt T dt bjt f stng us w n b d s ts wn spty. S ts dt bjt n nt b d n unfm v. Adng t t spty f ts dt bjt, t n b ssfd t fn dt bjt, tv dt bjt nd su dt bjt. Rfn dt bjt mny mns t dt bjt d, tug ts dt bjt sdm d wtng ptn, but t s g munt f dng uss, t tv nd st f dt bjt n pdu ug dt bjt nty. Atv dt bjt mns t dt d nd wt. Ts dt bjt s ngb, nd xsts vy st tm. Rsu dt mns t dt bjt n d nd wt t t sm tm. Adng t nyss bv, t fn dt bjt f stng us nudng: us dt bjt, t dt bjt f mt pp f us, t dt bjt nd t dt bjt f t mt pp f t. Atv dt bjt nudng: stng us sut dt bjt, t dt bjt f std numb f us nd t dt bjt f std numb f t. 2.4 T dsgn f g md Adng t t nyss sut f bjt f stng us, t n b ssfd t t dffnt dt bjt. W w ts dt bjt, t nds t st stutu unt spndng t t ndpndnt st n mmy, w s d nmd. Ts nmd s st; ds nt ntf wt t. W t sv pptn pgms sng ust, t n st nmd f vy pptn pgm sptvy. At t sm nmd, f t sm knd f dt bjt, but t ntnt s dffnt, t nds t pss pttn t t nmd, w n sv t pbm f ntdtn f dt, w n mpv tv ffny. By ts, w gt nw g md f nw sv f dt bjt, s fgu 2.

3 Appd Mns nd Mts Vs C sv C sv C sv Nm C 1: MyBsDt Sub:Cuss,T, Nm C 2: MyAtvDt Sub:C_unt,T_unt, Nm C 3: MySuDt Fgu 2 C g md dsgn In t stng systm f ts pp, w w nm t fn dt bjt ssftn s MyBsDt. And t pss pttn dng t dffnt ntnt, t dvds nt dt bjt pttn, t uuum t mt t numb f dt bjt pttn, t dt bjt pttn nd t s mt numb f dt bjt pttn. Atv dt bjt ss s nmd MyAtvDt, s ssfd t t sut f stng uuum dt bjt pttn, us std numb pttn, t std numb f t pttn, t. su dt bjt ss s nmd s MySuDt. 3 Cnstutn f JBss C bsd n dstbutd mut-v 3.1 Dstbutd mut-v g ttu dsgn Adng t t spty f t systm f stng us, t d bjt mst s dt bjt. W w nstut dstbutd, w n dd t dtbs sv nd Wb pptn sv. T sv n t dt bjt f dtbs sv, w n ffty sv t pbm f sbty f dtbs sv; gty du t pssu f dtbs sv. T fgu 3 sws t nstutn f t dstbutd ttu f Wb pptn sv, mny ssfd dt y, y, pptn sv y nd us y. Uss Ly n t p A L n t p A L n t p A L Wb Apptn Sv Ly v S C v S C v S C C DtBs Dt Ly Fgu 3 Dstbutd ttu

4 2124 Fnts f Mnuftung nd Dsgn Sn IV W us vsts pptn sv ntnt, t pptn pgm f Wb pptn sv k wt t n b gt n t spndng sv. If t dt bjt ds nt xst n t sv, tn k t t nd svs f dstbutd, unt fnd ut t dt bjt ndd. If t ds nt xst n t v dstbutd, tn gs t ptn dtbs, t gt dt bjt ndd, nd ty t d ts bjt t dstbutd. Expt st up sv, t s nd t st up pptn sv y nd, w mpv t spd f us dt tv. It nds t mk su pptn sv y nd unfm wt sv bjt. Objt s tv fm dtbs sv t dstbutd, fm st t pptn sv y nd t nt, w fms t dstbutd mut-v f Wb pptn sv. Wn us snds ut qust, sv fst k t wt xsts spndng bjt, f nt, tn gs t sv tt s y s, f t gts t, t tun t sut nd fs t f pptn y nd t nt. If nt fund, t gs t dtbs t fnd dt bjt, nd t t sv nd t pptn sv y nd t nt t t sm tm. 3.2 T sutn f nstutng t Wb pptn sv dstbutd mut-v bsd n JBss C JBss C s py f t tnstn, t ws t ntps v pptn dt t mpv pptn sv [4-6]. C sv nds fm t g stutu, t nds usng JGup t mutst mmuntn, t dt f nds s pd utmty, w fms dstbutd ust. Usng JBss C t st up dstbutd btwn Wb pptn sv nd dtbs, t fm y, s fsb sutn t du t pssu f dtbs sv. JBss C3.0 JBssAS 5.0 Dt Sv JBss C3.0 Sq sv 2008 JBss C3.0 C Ly Uss Fgu 4 Dstbutd nfgutn bsd n JBss C (1) Rpng sttgy dsgn T pmt nfgutn f JBss C. Cnfgutn bsd n XML dumnt, w tw f t ky pmt must b nfgud. WkUpIntvSnds pmt dfns w mu tm td unnng pmnt. PyCss pmt dfns w sttgy s dptd t pmnt. If t ds nt nfgud, t w b dptd t pmnt sttgy bsd n LRU gtm. It s n b pd by t p sttgy. Nmng nd dstbutn. W sttng up JBss C dstbutd, dng t t bjt ss nyss f t 2 ptn, t nds t nm sv dffnt nd pttn, t dffnt typ f dt. Tt s MyBsDt s nmd t st fn dt, MyAtvDt s nmd t st tv dt nd MySuDt s nmd t st su dt.

5 Appd Mns nd Mts Vs (2) Cnstutng dstbutd mut-v JBss C suppts mut-v, tt s suppt sv y nd. L ds nt ptpt ust, nd ds nt mmunt wt t f ust, by dptng s, us n mdfy md t ny tm. Sv y dpts t ttu t fm ust. T ust nds st up b gup st mmuntn by usng JGup, t updt f n dpt synnus synnus md t py. In ts s, st up nfgutn f s TC.xm, n w st up ust nm, py md nd JGup mmuntn nfgutn t. nd tn dpy t t JBss pptn sv. In t dstbutd bsd n JBss C, wn t us snd ut qust t, t sv fst k nd pptn sv wt ty xst spndng dt. If nt, tn t gs t JBss C sv tt s y t s, f fnd t, t tun t dt nd updt pptn sv nd nt. If nt fnd, tn t gs t dtbs t fnd t dt, nd t JBss C sv nd updt pptn sv nd nt. T ust ttu bv, usng t JBss C dpyd n mdd y, t sbty nd t v f pfmn nd vbty f pptn sv s gty mpvmnt. M dt, mpv t sbty f sv ttu zs t pssbty f mpttn f dtbs su, mks m fxbty. T ttu f xpnsbty n dynmy djust us t dffnt sv nds dng t t usg f su, w mpv t spndng tm nd du t dy. T g vbty ust f JBss C n du t st f dt w n f nds ds nt wk. 4. T pptn pt f dstbutd tngy n stng us systm T pptn sv f Gungx Vtn nd Tn Cg f Agutu s JBssAS. Bf m t us t, w ty t us LdRunn 8.1 t mk pssu tst n JBss C dstbutd mut-v. Fst us t VuGn f LdRunn t mk t spt f tw nvnmnt f nn stng us systm w s stup bf nd ft. Tn w us Cnt t smut 50 vtu uss, 100 vtu uss, 150 vtu uss, 200 vtu uss, 250 vtu uss t vst ts systm. And tn mp t sut, w fnd tt, ft nfgung, t tugput f sv (s fg. 5) nd k tug t (s fg.6) mk gt mpvmnt. Fg.5 T tugput f mpsn f vng nt

6 2126 Fnts f Mnuftung nd Dsgn Sn IV Fg.6 T k tug t mpsn f vng nt Aft vftn, t tngy f dstbutd bsd n JBss C s ppd t t stng us systm f Gungx Vtn nd Tn Cg f Agutu; fftvy sv t pbms f Wb pptn sv dwntm w sv tusnd vsts vst t t sm tm. Cnstutng dstbutd mut-v n t Wb pptn sv, t n gty mpv t sv quty f Wb pptn sv, w t y s nug svs. S t s fsb sutn t mpv Wb pptn sv pfmn. 5. Cnusn T t ssu f wdy usd g dng f stng us systm, t nstut dstbutd mut-v n sttng up Wb pptn sv, by t pt pptn nd smutn vftn fund tt t mk mpvmnt n t pfmn f Wb pptn sv, t pvds fsb mtd t sv t dy vn dwntm pbm f g s stng us systm. 6. Aknwdgmnt T s wk ws supptd by sntf s fund f gungx pvn dutn dptmnt (NO LX620) Rfns [1] Lng Cn.Rsu Atn n Mddw f Stmng Dt[R].Nw Yk:ACM Intntn Cnfn Pdng Ss,2004,pp [2] D.Rss,E.Tun.Tstng J2EE ustng pfmn nd wt w fund t In Pdngs f 23d Sympsum n Rb Dstbutd Systms[C].Fnps,Bz:SRDS,2004,pp [3] Xu Jnng,Hu Qngng,Wng-Cn L.Pfmn vutn f n ptm pmnt py f wss dt dssmntn[j].ieee Tnstns n Knwdg nd Dt Engnng,2004,16(1): [4] S L,Hn Yngj.An SPN bsd ntgtd md f wb pftng nd ng[j].jun f Cmput Sn nd Tngy,2006,21(4): [5] Yng L, Ln Zu, Jun W, Hu Zng, T Hung. Squnt Pttn-Bsd C Rpmnt n Svt Cntn[J].Cm,Ity:ICWE,2007,pp [6] Cuus B G,Dm J,Kngbg T.Dstbutd Systms-Cnpts nd Dsgn[M]. Bn, Gmny: Addsn-W sy,2000.