Qué Es La Persistencia de Datos

 

 

Zué cs mj pcrsistcahij dc djt`s

 Mj pcrsistcahij dc djt`s sc rcoicrc j m`s djt`s rcsidujmcs quc qucdja dc ua jrhbiv` mucl` dc quc sc bja bchb` iatcat`s pjrj cmigiajrm` ` f`rrjrm`. Cst`s rcsidu`s pucdca  scr hjusjd`s p`r cm pr`hcs` dc cmigiajhiøa mmcvjd` p`r cm sistcgj `pcrjtiv` quc dcnj m`s djt`s iatjht`s, p`r cm o`rgjtc` dc gcdi`s dc jmgjhcajgicat` quc a` cmigiaj m`s djt`s prcvijgcatc cxistcatcs ca cm gcdi`s, ` dcfid` j mjs hjrjhtcrçstihjs oçsihjs dcm  gcdi` dc jmgjhcajgicat` quc pcrgitca rchupcrjr djt`s prcvijgcatc cshrit`s.  Mj pcrsistcahij dc djt`s pucdc pcrgitir pcr gitir mj rchupcrjhiøa dc mj iao`rgjhiøa y mj pucdc dcnjr cxpucstj si a` sc bjhc ua h`rrcht` gjacn` dcm disp`sitiv` y sc mifcrj ca ua cat`ra` a` h`atr`mjd`, p`r cncgpm` si sc picrdc, sc jrr`nj j mj fjsurj ` sc dcnj ca gja`s dc tcrhcr`s.  Guhb`s sistcgjs `pcrjtiv`s, lcst`rcs dc jrhbiv`s y `tr` s`otwjrc pr`p`rhi`aja gét`d`s dc f`rrjd` ca m`s quc ua jrhbiv` a` sc cmigiaj iagcdijtjgcatc hujad` cm  usuj us ujri ri` ` s` s`mi mihi hitj tj cs csj j jh jhhi hiøa øa.. Ca su mu mulj ljr, r, cm jr jrhb hbiv iv` ` sc gu gucv cvcc j ua êr êrcj cj dc jmgjhcajgicat` tcgp`rjm, dca`giajd` usujmgcatc ”Ujpcmcrj dc rchihmjnc‗, m` quc  ojhimitj jm usujri` dcsbjhcr ua crr`r.  Dcm gisg` g`d`, guhb`s pr`duht`s dc s`otwjrc hrcja jut`gêtihjgcatc h`pijs dc  scluridjd dc m`s jrhbiv`s quc sc cstêa cditjad`, pjrj pcrgitir jm usujri` rcstjurjr mj vcrsi vc rsiøa øa `r `ril ilia iajm jm ` rch rchup upcrj crjrsc rsc dc ua p` p`sif sifmc mc oj ojmm mm`, `, hj hjrj rjht htcrç crçsti stihj hj dc dca` a`gi giaj ajdj dj usujmgcatc ”Jut`sjvc‗ (”Jut`lujrdjd (”Jut`lujrdjd`‗). `‗).  Iahmus` hujad` a` sc pr`p`rhi`aj ua rchurs` dc rctcahiøa tcgp`rjm dc jrhbiv`s f`rrjd f` rrjd`s `s ` huj hujad` ad` cm usu usujri jri` ` a` m` uti utimiz mizj, j, m`s sist sistcgj cgjss `pc `pcrjt rjtiv` iv`ss a` cmi cmigia giaja ja rcjmgcatc cm h`atcaid` dc ua jrhbiv` hujad` sc cmigiaj, j gca`s quc sc utimihca h`ashicatcgcatc bcrrjgicatjs dc f`rrjd` sclur`. Ca su muljr, sigpmcgcatc cmigiaja mj catrjdj dcm jrhbiv` dcm dircht`ri` dcm sistcgj dc jrhbiv`s p`rquc cs gês rêpid` y rcqui rcq uicr crcc gc gca` a`ss trj trjfj fjn` n`,, y cm h` h`at atca caid id` ` dc dcmm jr jrhb hbiv iv` ` pc pcrg rgja jach chcc ca cm gc gcdi di` ` dc jmgjhc jmg jhcajg ajgica icat` t` bjs bjstj tj qu qucc cm sist sistcgj cgj `pc `pcrjt rjtiv` iv` rcu rcutim timihc ihc cm csp cspjhi jhi` ` pj pjrj rj luj lujrdj rdjr  r  aucv`s djt`s.

 

 Ca jmlua`s sistcgjs, p`r divcrs`s g`tiv`s tjgfiéa sc dcnja jtrês suoihicatcs s uoihicatcs gctjdjt`s dcm sist sistcgj cgj dc jrh jrhbiv biv`s `s h`g h`g` ` pjr pjrj j pcrg pcrgiti itirr uaj oêhim rchu rchupcr pcrjhi jhiøa øa dc jrh jrhbiv biv`s `s gcdijatc utimidjdcs dc s`otwjrc. Iahmus` hujad` mj rchupcrjhiøa cs igp`sifmc, m`s djt`s, bjstj quc sc bja s`frcshrit`, pucdca scr mcçd`s p`r ua s`otwjrc quc mcj m`s  scht`rcs dcm dish` dirchtjgcatc. Mj iao`rgêtihj o`rcasc cgpmcj j gcaud` gcaud` tjm s`otwjrc.

 Igp`rtjahij  Igp`rtj ahij dc m`s djt`s pcrsistcatcs pcrsistcatcs

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X` X`fr frcsh cshri ritu turj rj>> Sa gét` gét`d` d` h` h`gþ gþag agca catc tc ut utim imizj izjd` d` pj pjrj rj h` h`at atrj rjrr rrcst cstjr jr mj  pcrsistcahij dc djt`s cs s`frcshrifir s`frcshr ifir m`s gcdi`s dc jmgjhcajgicat` h`a aucv`s djt`s. Dcf cfiid` j quc cs csttc gét`d` pucd cdcc igpmcgca cgcattjrsc j gcaud` cx cxhm hmus usiv ivjg jgca catc tc ca fjsc fjsc j s` s`ot otwj wjrc rc,, y pu pucd cdcc sc scrr hj hjpj pjzz dc sc scmc mchh hhi` i`aj ajr  r   scmchtivjgcatc søm` uaj pjrtc dcm gcdi`, cs uaj `phiøa p`pumjr y dc fjn` h`st`  pjrj jmluajs jpmihjhi`acs. Mj s`frcshriturj cs lcacrjmgcatc ua gét`d` jhcptjfmc dc f`rrjr, sicgprc y hujad` cm s`p`rtc scj cshrififmc y a` csté djújd`. Mj téhaihj dc s`frcshriturj gês sigpmc cshrifc m`s gisg`s djt`s ca t`djs pjrtcs, j gcaud` søm` ua pjtrøa dc hcr`s ` ua`s. H`g` gçaig`, cst` cvitjr cvi tjrê ê quc m`s djt`s djt`s scja scja rchupcr rchupcrjd` jd`ss sigpmc sigpmcgca gcatc tc mcycad` mcycad` dc aucv` aucv` m`s gcdi`ss usjad` gcdi` usjad` ouahi`acs ouahi`acs cstêadjr dcm sistcgj. sistcgj. Ujrj h`atrjrrcstjr h`atrjrrcstjr téhaihjs dc rchu rchupc pcrj rjhi hiøa øa dc dj djt` t`ss gês gês jv jvja jazj zjdj djs, s, sc bj bja a dc dcsj sjrr` rr`mm mmjd jd` ` pj pjtr` tr`ac acss dc  s`frcshritj cspchçoih`s jmcjt`ri`s ` h`a gþmtipmcs pjsjdjs, dcstiajd`s j crrjdihjr hujmquicr trjzj dc oirgjs.

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 Dcsgjlactizjhiøa> cs mj cmigiajhiøa ` rcduhhiøa dcm hjgp` gjlaétih` dc ua dish` dis h` ` uaidjd uaidjd,, utimiz utimizjad jad` ` ua disp`s disp`siti itiv` v` dca`gi dca`giajd ajd` ` dcsgjl dcsgjlact actizj izjd`r d`r,, discújd` pjrj cm gcdi` quc sc vj j f`rrjr. Jpmihjdj j gcdi`s gjlaétih`s, mj dcsgjlactizjhiøa pucdc purljr t`d` ua gcdi` dc o`rgj rêpidj y coihjz. Mj dcsgjlactizjhiøa j gcaud` bjhc quc m`s dish`s dur`s a` ouahi`aca, yj quc f`rrj cm o`rgjt` dc fjn` aivcm quc søm` sc rcjmizj ca mj oêfrihj durjatc mj  ojfrihjhiøa. Ca jmlua`s hjs`s, cs p`sifmc dcv`mvcr mj uaidjd j ua cstjd`  ouahi`ajm bjhiéad`mj rcpjrjr ca cm ojfrihjatc. Xia cgfjrl`, jmlua`s dcsgjlactizjd`rcs utimizja ua pums` gjlaétih` tja oucrtc quc iahmus` cm g`t`r  quc lirj m`s pmjt`s pucdc scr dcstruid` ca cm pr`hcs` dc dcsgjlactizjhiøa, y cm  jrrclm` pucdc a` scr rcatjfmc

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 Cahriptjhiøa> Cm hiorjd` dc djt`s jm jmgjhcajrm`s pucdc gitiljr mjs  prc`hupjhi`acs s`frc mj pcrsistcahij pcrs istcahij dc djt`s. Xi mj hmjvc dc hiorjd` cs oucrtc y cstê huidjd`sjgcatc h`atr`mjdj, cm hiorjd` pucdc h`ascluir dc gjacrj cochtivj quc hujmquicr iao`rgjhiøa jmgjhcajdj ca cm gcdi` scj irrchupcrjfmc. Xi mj hmjvc cstê jmgjhcajdj ca cm gcdi`, pucdc rcsumtjr gês oêhim ` gês rêpid`  s`frcshrifir søm` mj hmjvc, orcatc j s`frcshrifir t`d` cm dish`. Cm hiorjd` sc  pucdc bjhcr jrhbiv` p`r jrhbiv`, ` ca cm dish` catcr`.

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 Dcstruhhiøa oçsihj> Mj dcstruhhiøa oçsihj dc m`s gcdi`s dc jmgjhcajgicat` cs mj  o`rgj gês sclurj dc h`atrjrrcstjr mj pcrsistcahij dc djt`s. Xia cgfjrl`, cm 

 

 pr`hcs` cs lcacrjmgcatc mjrl`, cal`rr`s` y pucdc rcqucrir gét`d`s cxtrcgjdjgcatc h`gpmcn`s, yj quc iahmus` ua orjlgcat` pcqucú` dcm gcdi`  pucdc h`atcacr lrjadcs hjatidjdcs dc djt`s. Mjs téhaihjs cspchçoihjs dc dc dcstr struh uhhi hiøa øa ia iahm hmuy uyca ca dc dcsb sbjh jhcr cr oçsi oçsihj hjgc gcat atcc cm gcdi gcdi` ` (p (p`r `r cn cncg cgpm pm`, `, p` p`r  r  triturjhiøa), jmtcrjr quçgihjgcatc cm gcdi` (p`r cncgpm`, gcdijatc iahiacrjhiøa ` cxp`sihiøa j pr`duht`s quçgih`s hêustih`s ` h`rr`siv`s) ` cxp`acr cm gcdi` j hjgp`s cmchtr`gjlaétih`s quc cxhcdca ca lrja gcdidj mjs cspchioihjhi`acs (p`r cncgpm`, h`rricatc h`rricatc cméhtri cméhtrihj hj dc jmt` v`mtjnc v`mtjnc ` rjdijhiøa rjdijhiøa dc gihr``adjs gihr``adjs dc jmtj jgpmitud), catrc `tr`s.   Hjrjhtcrçstihj dc m`s djt`s pcrsistcatcs  

H`gpca gpcasj sjhi hiøa øa (H (Hmc mcjr jria ial l)> H`a H`asi sist stcc ca rc rcg` g`vc vcrr dc dcmm di disp sp` `siti sitiv` v` dc jmgjhc jmg jhcajg ajgica icat` t` m`s djt`s djt`s scasif scasifmcs, mcs, dc uaj o`rgj o`rgj quc rcsumtc rcsumtc igp`si igp`sifmc fmc rchupcrjrm`s rchupc rjrm`s h`a mjs bcrrjgicatjs bcrrjgicatjs `orchidjs `orchidjs p`r cm sistcgj `pcrjtiv` `pcrjtiv` ` h`a ua  s`otwjrc dc rchupcrjhiøa dc djt`s. Xia cgfjrl` m`s djt`s s`a rc rchupcrjfmcs hupcrjfmcs h`a téhaihjs rcjmizjdjs ca mjf`rjt`ri`s cspchijmizjd`s.

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 Uurlj (Uurlial)> Tjgfiéa h`a`hidj h`g` bilicaizjhiøa (Xjaitizial), mj purlj h`asistc ca rcg`vcr m`s djt`s scasifmcs dj tjm o`rgj quc a` scja rchupcrjfmcs fjn` aialuaj téhaihj h`a`hidj. Mj purlj sc bjhc dc uaj o`rgj pr`p`rhi`ajm j mj ig igp` p`rtj rtjah ahij ij dc m` m`ss dj djt` t`s, s, a` a`rg rgjm jmgc gcat atcc cstc cstc pr pr`h `hcs cs` ` sc bj bjhc hc ja jatc tcss dc dcschbjr j mj fjsurj ua disp`sitiv` dc jmgjhcajgicat` ` hujad` sc trjsmjdj j `trj h`gputjd`rj. Ujrj m`lrjr mj purlj sc usja téhaihjs h`g` mj s`frcshriturj, quc h`asistc ca s`frcshrifir vjrijs vchcs cm cspjhi` dcm quc sc quicrca rcg`vcr  m`s djt`s pcrsistcatcs.

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 Dcstruhhiøa (Dcstruhti`a)> H`asistc ca mj dcstruhhiøa oçsihj dcm gcdi` dc jmgjhc jmg jhcajg ajgica icat`, t`, utimiz utimizjad jad` ` téhaihj téhaihjss dc dcstruh dcstruhhiø hiøa a h`g` h`g` mj triturj triturjhiø hiøa, a, mj iahiacrjhiø iahia crjhiøa a y mj jpmihjhiøa jpmihjhiøa dc hjrljs cméhtrihjs cméhtrihjs p`r cahigj dc mjs quc rcsistc cm gcdi gcdi` `. Cst stcc cs cm gét` ét`d` gês gês drê rêst stih ih` ` y cm gês gês sc sclu lur` r` si sc bj bjhc hc h`rrchtjgcatc, yj quc dc m` h`atrjri` pucdc dcnjr djt`s rchupcrjfmcs gcdijatc gét`d`s dc mjf`rjt`ri`

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