Taw qhia rau Caching – ib qhov kev kawm no

Taw qhia rau Kev Ntxuav Tes – Ib qho kev kawm ntawv booster

Txheej txheem cej luam : Kev kawm yog ib sab ntawm tej ntaub ntawv tseemceeb tshaj plaws, muab nws stand-alone, Web raws li, distributed lossis theem enterprise. Yog koj tsis muaj kev ua tau zoo yav tom ntej, ces koj ua hauj lwm yuav tau txoj kev hnyav ncawv. Caching yog ib qhov tseem ceeb tshaj plaws los xav txog. Lub hom phiaj ntawm tsab xov xwm no yog los tshawb fawb txawv caching concepts thiab lawv yuav siv.

Peb yeej tsis yuav khib peb lub sij hawm los dab ntau caching kev tshawb xav, theej, Peb yuav ceev nrooj dhia mus rau hauv cov tswv yim sib txawv caching.

Lub hom phiaj ntawm tsab xov xwm no yog los tshawb sib txawv mechanisms, uas yuav pab koj xaiv txoj kev uas zoo rau koj daim ntawv thov kev pab.

Dab tsi yog tuag?

Os, Kuv yuav coj ib lub sij hawm muab ib nyuag luv luv heev thiab piav txog kev tuag. Qhov no yog thawj zaug, leej twg xav tshawb caching thiab siv nws.

Li ntawd, tej yaam num tsim tawm, thov ua siab ntev thiab tos. Koj kuj tseem yuav ntxiv qhov tseem ceeb ntawm kev sib koom koj paub thiab sau ntawv rau hauv qab no. Kuv mas nws yeej ntxiv cov ntawv zoo nyob rau hauv kuv tsab xov xwm.

Caching yog ib lub tswvyim, uas yog siv los ntawm ntau txoj kev sib txawv. Caching txhais tau tias cia cov ntaub ntawv feem ntau siv cov ntaub ntawv ib ntus hauv ib qhov chaw nco lossis nco buffer. Caching yog ib lub sij hawm luv luv luv thiab ib ntus. Nws txo tus xov tooj hits rau cov ciam teb cia, ua tau zoo dua qub.

Tab sis npog, yuav tshawb xyuas ntau cov complexities. Peb yuav tau high-light cov chaw hauv qab no.

Yuav tsum nyeem – Li cas Caching System Java (JCS) ua haujlwm?

Caching cov tswv yim

Os, Peb yeej yuav tham txog kev sib txawv mechanisms uas yog lug siv nyob rau hauv txoj kev ua lag luam. Apart from daim ntawv teev npe, Muaj ob peb lwm txoj kev tseem, Tab sis peb yog tsuas focusing rau cov uas puas loj.

Scaling (Horizontal thiab Vertical): Scaling yuav tau horizontal lossis kev nyab xeeb. Nyob rau hauv kev ncaj ncees scaling ntau yam li RAM, CPU, HD yog ntxiv nyob hauv lub tshuab ib zaug xwb, uas ua tau zoo caching capabilities. Hauv horizontal scaling, Cov cav tov ntxiv, uas ua tau zoo caching efficiency. Ob leeg pab hauv daim ntawv thov txog qib uas yuav tsuas.

Txheej Txheem: Nyob rau hauv no hom caching, tej yam khoom muaj nyob rau hauv cov lus piv txwv uas muaj daim ntawv thov. Li ntawd, Nws muaj nws ib qho muaj zog binding ntawm cov khoom cached thiab daim ntawv thov kev pab thiab lawv muab ib yam nco hauv zos. Yog muaj ntau yam kev piv txwv ntawm daim ntawv thov, Ces synchronization yuav muaj kev sib tw loj. Qhov no yog qhov yooj yim tshaj plaws uas caching implement.
Nco tau phem faib: Qhov no yog ib qho DVR ib lwm implementation uas cachare cache pab. Os, Daim ntawv thov no tsis nruj nreem nrog cov khoom cache (tsis nyiam ua txheej txheem).Ib tug neeg tau txais kev pab yuav muab cov ntaub ntawv uas siv los mus saib tau cov ntaub ntawv cachees thiab sib tham nrog cov ntaub ntawv. Os, Cov ntaub ntawv yog muab rau tus raug tseem ceeb/tus nqi khub. Hom caching yog deployed hauv ib cheeb tsam clustered nrog ib zaug xwb logical saib.

Tab sis npog, Yuav ua li cas daim ntawv thov paub qhov uas cov ntaub ntawv cached yog muab rau ib cheeb tsam clustered? nug? Thiab, Lo lus teb yog – caching neeg siv algorithms los nrhiav kev qhia txog cov ntaub ntawv.

Nyob rau hauv-nco database: Kev txhim kho databases yog nrov heev rau kev txhim kho. Os, Cov ntaub ntawv yog muab cia rau hauv RAM es cov disk nyuaj. Cov ntaub ntawv yog muab rau hauv cov ntaub ntawv compressed thiab nws yuav siv tau SQL.
Tshooj 1 cache: L1 cache yog ib qho kev sib kho kom haum. Nws tshwm sim ntev li qhov kev sib kho tshwm sim. Tag nrho cov ntaub ntawv belongs rau ib zaug xwb yuav muab stored li ntawd qhib xwb. Nws tsis tau muab qhia los ntawm ntau zaus sib kho.

Tshooj 2 cache: Rau lwm cov tes, L2 cache yog qhib lub Hoobkas. Nws yuav muab tau ntau zaug nyob rau hauv lub hoobkas zaug. Nws puas lawm thaum lub Hoobkas qhib yog kaw. Hom caching no yog ib theem dua L1 cache.

Koj kuj mus xyuas tau – Muab daim ntawv qhia txog Java 9 thiab Java 10 Tshiab

Txoj kev sib tw: Raws li tham txog saum toj no, txuag tau yooj yim los yog txoj yooj yim hauv qhov xwm. Yooj yim uas yuav siv tau yooj yim, tiam sis txoj kev caching yuav siv sij hawm, siv zog thiab tsim kom muaj.

Tom qab no yog ib co kev sib tw txoj kev sib tw los ntawm cov developers/architects.

Synchronization ntawm cached cov ntaub ntawv nyob rau hauv ib cheeb tsam faib
Npaj kom muaj kev ua txaus nti
Kom refreshing mechanism
Kev kawm thiab kev nco ntsoov siv
Kev txhawj xeeb txog tej teeb meem
Daim ntawv qhia txog kev ua hauj lwm
Kev cia siab rau, muaj scalability thiab scalability

tshawb kawm – Ntau tsab xov xwm ntawm Java thiab J2E

Xaus: Nyob rau hauv tsab xov xwm no peb twb sim tshawb ntau yaam ntawm caching. Peb muaj kuj them ntau yam caching tswv yim thiab lawv qoj. Muaj ntau lwm txoj kev kuj, tiam sis lub tswvyim yooj yim nyob tib yam li tham txog saum toj no. Vam cia no tsab xov xwm no yuav pab kom koj to taub.

Sau ntawv los ntawm Kaushik (Founder thiab CEO of www.techalpine.com) – Kaushik yog ib tug Technical Architect los ntawm profession, ntau tshaj 20 Xyoo kev ua lag luam hauv NWS kev lag luam. Passionate txog lub tshuab ntiaj teb. Xav ua software tsim, technologies, Ntawv loj, AI thiab tshuab uas pheejyig npaum licas. Qhia thiab mentoring nws kev txawj ntau tshaj 12 xyoo. Tseem, muab kev koom tes rau hauv internet/offline, sib tham, yug noj yug haus, kev cob qhia thiab kev coach.

Yog hais tias koj muaj tej lus nug, email kuv @ techalpineit@gmail.com. Kuv yuav nyiam hnov ntawm koj.

Ib txhia ntxiv nyiam – Koj yuav tau saib.