Mhoro, vaverengi veHabr! Musoro wechinyorwa ichi uchave wekushandiswa kwezvishandiso zvekugadzirisa njodzi muAERODISK Injini yekuchengetedza masisitimu. Pakutanga, taida kunyora mune chimwe chinyorwa nezvezvishandiso zviviri: kudzokorora uye metrocluster, asi, zvinosuruvarisa, chinyorwa chakazove chakareba, saka takakamura chinyorwa muzvikamu zviviri. Ngatibvei kubva nyore kuenda kune yakaoma. Muchinyorwa chino, isu tichamisa uye kuyedza synchronous replication - isu tichadonhedza imwe data data, uye zvakare kutyora nzira yekutaurirana pakati penzvimbo dze data toona zvinoitika.
Vatengi vedu vanowanzotibvunza mibvunzo yakasiyana-siyana nezve kudzokorora, saka tisati taenderera mberi nekumisikidza uye kuyedza kuita replicas, isu tichakuudza zvishoma nezve izvo kudzokorora mukuchengetedza.
Chimwe chezvinyorwa
Kudzokorora mumasisitimu ekuchengetera inzira inoenderera yekuve nechokwadi chekuzivikanwa kwedata pane akati wandei masisitimu ekuchengetedza panguva imwe chete. Nehunyanzvi, kudzokorora kunoitwa nenzira mbiri.
Synchronous replication - uku kukopa data kubva kune huru yekuchengetedza sisitimu kune iyo backup imwe, inoteverwa neinosungirwa kusimbiswa kubva kune ese ekuchengetedza masisitimu kuti iyo data yakanyorwa uye yakasimbiswa. Iri mushure mekusimbiswa pamativi ese (ese ari maviri ekuchengetedza masisitimu) iyo data inoonekwa seyakanyorwa uye inogona kushandiswa nayo. Izvi zvinova nechokwadi chekuzivikanwa kwedata pane ese masystem ekuchengetera anotora chikamu mune replica.
Zvakanakira nzira iyi:
- Data rinogara rakafanana pane ese ekuchengetedza masisitimu
Cons:
- Mutengo wepamusoro wemhinduro (yekukurumidza kutaurirana nzira, inodhura optical fiber, marefu-wave transceivers, nezvimwewo)
- Kurambidzwa kure (mukati memakumi emakumi emakiromita)
- Iko hakuna dziviriro kubva kune zvine musoro data huwori (kana data rakashatiswa (nemaune kana netsaona) pane huru yekuchengetera sisitimu, inongoerekana yashatiswa uye ipapo ipapo inoshatiswa pane iyo backup, sezvo iyo data inogara yakafanana (ndiyo gangaidzo)
Asynchronous replication - izvi zvakare kukopa data kubva kuhombe yekuchengetera system kune iyo backup imwe, asi nekumbononoka uye pasina chikonzero chekusimbisa kunyora kune rimwe divi. Iwe unogona kushanda nedata pakarepo mushure mekurekodha kune iyo huru yekuchengetedza system, uye pane backup yekuchengetedza system data ichave iripo mushure menguva yakati. Kuzivikanwa kweiyo data mune iyi kesi, hongu, haina kuvimbiswa zvachose. Iyo data pane backup yekuchengetedza system inogara idiki "munguva yakapfuura."
Pros of asynchronous replication:
- Yakaderera mutengo mhinduro (chero nzira dzekukurukurirana, optics sarudzo)
- Hapana zvirambidzo zvedaro
- Pane iyo backup yekuchengetedza sisitimu, data haiparare kana ikakuvadzwa pane iyo huru (zvinenge kwenguva yakati); kana data rikashatiswa, unogona kugara uchimisa replica kudzivirira huwori hwe data pane backup yekuchengetedza system.
Cons:
- Dhata munzvimbo dzakasiyana dze data hadzisi kufanana
Saka, kusarudzwa kwekudzokorora modhi kunoenderana nezvinangwa zvebhizinesi. Kana zvakakosha kwauri kuti iyo backup data centre ine chaiyo data seyakanyanya data data (kureva, bhizinesi rinodiwa reRPO = 0), ipapo uchafanirwa kuburitsa mari uye kutsungirira zvipimo zvesynchronous. replica. Uye kana kunonoka mune data data kunogamuchirwa kana pasina mari chete, saka iwe unofanirwa kushandisa iyo asynchronous nzira.
Ngatitoreiwo zvakasiyana tiratidze modhi yakadai (kunyanya, topology) semetrocluster. Mune metrocluster modhi, synchronous replication inoshandiswa, asi, kusiyana neyakajairwa replica, metrocluster inobvumira ese ari maviri ekuchengetedza masisitimu kuti ashande mune inoshanda mode. Avo. iwe hauna kupatsanurwa pakati peanoshanda uye akamirira data nzvimbo. Zvishandiso zvinoshanda panguva imwe chete nemasisitimu maviri ekuchengetedza, ayo ari munyama munzvimbo dzakasiyana dze data. Nguva dzekuderera panguva dzetsaona mune yakadaro topology idiki kwazvo (RTO, kazhinji maminetsi). Muchinyorwa chino hatizotarise kuita kwedu metrocluster, nekuti iyi inyaya hombe uye ine simba, saka isu tichapa yakaparadzana, inotevera chinyorwa kwairi, mukuenderera mberi neichi.
Zvakare, kazhinji, kana tichitaura nezve kudzokorora tichishandisa masisitimu ekuchengetedza, vanhu vazhinji vane mubvunzo unonzwisisika: > "Mazhinji maapplication ane maturusi avo ekudzokorora, sei uchishandise kudzokorodza pamasisitimu ekuchengetedza? Zviri nani here kana kuti zvakaipa?
Iko hakuna mhinduro yakajeka pano, saka heino nharo dzeKUTI neCONS:
Nharo dzezvekudzokorodza kwekuchengetedza:
- Kureruka kwemhinduro. Nechishandiso chimwe chete, unogona kudzokorora yako yese seti yedata, zvisinei nemhando yekuremerwa uye mashandisirwo. Kana iwe ukashandisa replica kubva kumaapplication, uchafanirwa kugadzirisa yega yega application zvakasiyana. Kana pane anodarika 2 azvo, saka izvi zvinonyanya kushanda nesimba uye zvinodhura (kudzokorodza kwekunyorera kunowanzoda rezinesi rakasiyana uye kwete remahara pachikumbiro chega chega. Asi zvakawanda pane izvo pazasi).
- Iwe unogona kutevedzera chero chinhu - chero application, chero data - uye inogara ichienderana. Mazhinji (akawanda) maapplication haana kugona kudzokorora, uye replicas kubva kune yekuchengetedza system ndiyo chete nzira yekupa dziviriro kubva kunjodzi.
- Iko hakuna chikonzero chekubhadhara zvakanyanya kune application replication mashandiro. Semutemo, haina kudhura, senge marezinesi ekuchengetedza system replica. Asi iwe unofanirwa kubhadharira rezinesi rekuchengetedza kudzokorora kamwe, uye rezinesi rekushandisa replica rinoda kutengwa kune yega yega application zvakasiyana. Kana paine akawanda maapplication akadaro, saka zvinodhura peni rakanaka uye mutengo wemarezinesi ekuchengetedza kudzokorora unova kudonha mubhaketi.
Nharo DZEKUPEDZA kudzokororwa kwekuchengetedza:
- Replica kuburikidza nemashandisirwo ane mamwe mashandiro kubva pakuona kwezvishandiso pachazvo, iyo application inoziva data rayo zvirinani (zviri pachena), saka kune dzimwe sarudzo dzekushanda navo.
- Vagadziri vemamwe maapplication havavimbise kuenderana kwedata ravo kana kudzokorora kuchiitwa uchishandisa chechitatu-bato maturusi. *
* - thesis ine nharo. Semuenzaniso, mugadziri anozivikanwa weDBMS anga achizivisa zviri pamutemo kwenguva yakareba kuti DBMS yavo inogona kungodzokororwa kazhinji vachishandisa nzira yavo, uye kumwe kudzokororwa (kusanganisira masisitimu ekuchengetedza) "haisi chokwadi." Asi hupenyu hwaratidza kuti handizvo. Zvingangodaro (asi izvi hazvina chokwadi) iyi haisiriyo nzira yakatendeseka yekutengesa kutengesa mamwe marezinesi kune vatengi.
Nekuda kweizvozvo, muzviitiko zvakawanda, kudzokorora kubva kune yekuchengetedza system kuri nani, nekuti Iyi isarudzo yakapfava uye isingadhure, asi pane nyaya dzakaomarara apo chaiyo application mashandiro anodiwa, uye zvinodikanwa kuti ushande ne-application-level replication.
Waita nedzidziso, zvino dzidzira
Isu tichagadzirisa replica mune yedu lab. Mumamiriro erabhoritari, takatevedzera nzvimbo mbiri dzedata (chaizvoizvo, machira maviri ari padyo aiita kunge ari muzvivakwa zvakasiyana). Iyo inomira ine maviri Injini N2 ekuchengetedza masisitimu, ayo akabatana kune mumwe nemumwe netambo dzemaziso. Sevha yemuviri inomhanya Windows Server 2016 yakabatana kune ese ekuchengetedza masisitimu uchishandisa 10Gb Ethernet. Chimiro chiri nyore, asi izvi hazvichinje essence.
Schematically inoita seizvi:
Sezvineiwo, kudzokororwa kwakarongwa sezvinotevera:
Zvino ngatitarisei mashandiro ekudzokorora atinawo iko zvino.
Maitiro maviri anotsigirwa: asynchronous uye synchronous. Zvine musoro kuti iyo synchronous mode inogumira nedaro uye nzira yekutaurirana. Kunyanya, synchronous mode inoda kushandiswa kwefiber sefizikisi uye 10 Gigabit Ethernet (kana yakakwirira).
Chinhambwe chinotsigirwa chekudzokorora kunoenderana makiromita makumi mana, kukosha kwekunonoka kweiyo optical chiteshi pakati pe data data inosvika 40 milliseconds. Muzhinji, ichashanda nekunonoka kukuru, asi ipapo pachava nekuderera kwakasimba panguva yekurekodha (izvo zvinewo musoro), saka kana uri kuronga synchronous replication pakati pe data data, unofanira kutarisa kunaka kwe optics uye kunonoka.
Izvo zvinodikanwa zveasynchronous replication hazvina kukomba zvakadaro. Kunyanya, ivo havapo zvachose. Chero kushanda kweEthernet kubatana kuchaita.
Parizvino, iyo AERODISK ENGINE yekuchengetedza sisitimu inotsigira kudzokorora kune block zvishandiso (LUNs) kuburikidza neEthernet protocol (pamusoro pemhangura kana optical). Kune mapurojekiti uko kudzokorora kuburikidza nemucheka weSAN pamusoro peFiber Channel kunodiwa, isu tiri kuwedzera mhinduro yakakodzera, asi haisati yagadzirira, saka kwatiri, Ethernet chete.
Kudzokorora kunogona kushanda pakati pese ENGINE akatevedzana ekuchengetedza masisitimu (N1, N2, N4) kubva kujunior masisitimu kuenda kune vakuru uye zvinopesana.
Kushanda kwemamodhi maviri ekudzokorora kwakafanana zvachose. Pazasi pane rumwe ruzivo nezve izvo zviripo:
- Kudzokorora "imwe kune imwe" kana "imwe kune imwe", kureva, iyo yekare vhezheni ine nzvimbo mbiri dzedata, huru uye backup.
- Kudzokorora "mumwe kune vakawanda" kana "mumwe kune vakawanda", kureva. imwe LUN inogona kudzokororwa kune akati wandei ekuchengetedza masisitimu kamwechete
- Activate, deactivate, uye "reverse" kudzokorora, zvichiteerana, kugonesa, kudzima, kana kushandura nzira yekudzokorora.
- Kudzokorora kunowanikwa kune ese ari maviri RDG (Raid Distributed Boka) uye DDP (Dynamic Disk Pool) madziva. Nekudaro, maLUN eRDG dziva anogona kungodzokororwa kune imwe RDG. Zvimwe chete neDDP.
Kune mamwe akawanda madiki maficha, asi hapana imwe pfungwa yekuanyora; isu tichazvitaura patinenge tichigadzira.
Kugadzirisa replication
Iyo yekuseta maitiro iri nyore uye ine nhanho nhatu.
- Network setup
- Storage setup
- Kuisa mitemo (makonesheni) uye mepu
Chinhu chakakosha pakumisikidza kudzokorora ndechekuti matanho maviri ekutanga anofanirwa kudzokororwa pane yekure yekuchengetedza sisitimu, nhanho yechitatu - chete pane iyo huru.
Kugadzira network resources
Danho rekutanga nderekugadzirisa network ports kuburikidza iyo inodzokorodza traffic ichafambiswa. Kuti uite izvi, unofanirwa kugonesa madoko uye kuseta yavo IP kero muFront-end adapter chikamu.
Mushure meizvi, isu tinofanirwa kugadzira dziva (mune yedu RDG) uye chaiyo IP yekudzokorora (VIP). VIP ikero yeIP inoyangarara yakasungirirwa kune maviri "pamuviri" kero dzekuchengetedza zvinodzora (zviteshi zvatakangogadzira). Ichi chichava chikuru chekudzokorora interface. Iwe unogona zvakare kushanda kwete neVIP, asi neVLAN, kana iwe uchida kushanda netagged traffic.
Maitiro ekugadzira VIP yereplica haana kunyanya kusiyana nekugadzira VIP yeI/O (NFS, SMB, iSCSI). Muchiitiko ichi, tinogadzira VIP yenguva dzose (isina VLAN), asi iva nechokwadi chekuratidza kuti ndeyekudzokorora (pasina chinongedzo ichi hatizokwanisi kuwedzera VIP kumutemo munhanho inotevera).
Iyo VIP inofanirwa kunge iri mune imwechete subnet seIP ports pakati painoyangarara.
Tinodzokorora zvigadziriso izvi pane imwe nzvimbo yekuchengetedza iri kure, ine IP yakasiyana, hongu.
VIPs kubva kune akasiyana masisitimu ekuchengetedza anogona kunge ari mune akasiyana subnets, chinhu chikuru ndechekuti kune routing pakati pavo. Muchiitiko chedu, muenzaniso uyu unonyatsoratidzwa (192.168.3.XX uye 192.168.2.XX)
Izvi zvinopedzisa kugadzirirwa kwechikamu chetiweki.
Kugadzirisa kuchengetedza
Kumisikidza kuchengetera replica kunosiyana kubva kune zvakajairwa chete pakuti isu tinoita mepu kuburikidza neyakakosha menyu "Replication Mepu". Zvikasadaro zvese zvakangofanana neyakajairwa setup. Zvino, muhurongwa.
Mune dziva rakambogadzirwa R02, unofanirwa kugadzira LUN. Ngatiigadzirei toidaidza kuti LUN1.
Isu tinodawo kugadzira iyo LUN yakafanana pane yekure yekuchengetedza system yehukuru hwakafanana. Isu tinosika. Kuti tidzivise kuvhiringidzika, ngatifonere iyo iri kure LUN LUN1R
Kana isu taida kutora LUN yatovepo, saka tichigadzira replica, isu taizoda kudzikisa iyi inobereka LUN kubva kumugadziri, uye kungogadzira isina chinhu LUN yehukuru hwakafanana pane iri kure yekuchengetedza system.
Iyo yekuchengetedza setup yapera, ngatienderere mberi nekugadzira mutemo wekudzokorora.
Kumisikidza mitemo yekudzokorora kana kudzokorora zvinongedzo
Mushure mekugadzira maLUN pane yekuchengetedza sisitimu, inova yekutanga panguva ino, isu tinogadzirisa mutemo wekudzokorora LUN1 pane yekuchengetedza system 1 kusvika LUN1R pane yekuchengetedza system 2.
Kurongeka kunogadzirwa mu "Remote replication" menyu
Ngatigadzirei mutemo. Kuti uite izvi, unofanirwa kutsanangura mugamuchiri weiyo replica. Ikoko tinoisawo zita rekubatanidza uye rudzi rwekudzokorora (synchronous kana asynchronous).
Mumunda we "remote system" tinowedzera yedu yekuchengetedza system2. Kuwedzera, unofanirwa kushandisa manejimendi ekuchengetedza IP masisitimu (MGR) uye zita reiyo kure LUN yatichaita kudzokorora (munyaya yedu, LUN1R). Kudzora IPs inodiwa chete padanho rekuwedzera chinongedzo; kudzokorora traffic haizofambiswe kuburikidza navo; iyo yakambo gadziridzwa VIP ichashandiswa kune izvi.
Parizvino padanho rino isu tinokwanisa kuwedzera anopfuura imwe kure sisitimu ye "imwe kune vakawanda" topology: tinya bhatani rekuti "wedzera node", sepamufananidzo pazasi.
Muchiitiko chedu, pane imwe chete nzira iri kure, saka tinozvigumira kune izvi.
Mutemo wakagadzirira. Ndokumbira utarise kuti inowedzerwa otomatiki kune vese vatori vechikamu (munyaya yedu pane maviri acho). Iwe unogona kugadzira yakawanda yakadai mitemo sezvaunoda, kune chero nhamba yeLUNs uye mune chero nzira. Semuenzaniso, kuenzanisa mutoro, tinogona kudzokorora chikamu cheLUNs kubva pakuchengetera sisitimu 1 kune yekuchengetera system 2, uye chimwe chikamu, pane zvinopesana, kubva pakuchengetera system 2 kusvika kune yekuchengetedza system 1.
Storage system1. Pakarepo mushure mekusikwa, kuwiriranisa kwakatanga.
Storage system2. Isu tinoona mutemo mumwechete, asi kuwiriranisa kwakatopera.
LUN1 pane yekuchengetedza system 1 iri muPrimary basa, kureva kuti, inoshanda. LUN1R pane yekuchengetera sisitimu 2 iri mubasa reSekondari, kureva kuti, iri pakamisikidzwa kana gadziriro yekuchengetera 1 ikatadza.
Iye zvino isu tinokwanisa kubatanidza LUN yedu kumugamuchiri.
Isu tichabatana kuburikidza neSCSI, kunyangwe ichigonawo kuitwa kuburikidza neFC. Kumisikidza mepu kuburikidza neSCSI LUN mune replica hakuna kumbosiyana neyakajairwa mamiriro, saka isu hatingatarise izvi zvakadzama pano. Kana paine, maitiro aya anotsanangurwa muchinyorwa "".
Musiyano chete ndewekuti isu tinogadzira mepu mu "Replication Mepu" menyu
Takagadzira mepu ndokupa LUN kumuenzi. Muridzi akaona LUN.
Isu tinoigadzira kuita faira renzvimbo.
Ndizvozvo, kuseta kwapera. Miedzo ichauya inotevera.
Kuedza
Tichaedza matatu makuru mascenario.
- Kugara uchichinja Sekondari > Puraimari. Kugara tichichinja basa kunodiwa kana, semuenzaniso, isu tinofanirwa kuita mamwe mabasa ekudzivirira munzvimbo huru yedata uye panguva ino, kuitira kuti data ivepo, tinoendesa mutoro kune backup data center.
- Emergency role switching Sekondari> Yepuraimari (data centre kutadza). Ichi ndicho chiitiko chikuru chekuti kudzokorora kuripo, izvo zvinogona kubatsira kupona kutadza kwedata data data pasina kumisa kambani kwenguva yakareba.
- Kupatsanurwa kwematanho ekutaurirana pakati penzvimbo dzedata. Kutarisa maitiro akarurama ezvirongwa zviviri zvekuchengetera mumamiriro ezvinhu apo nokuda kwechimwe chikonzero nzira yekukurukurirana pakati pe data data haiwaniki (somuenzaniso, mucheri wakachera panzvimbo isiri iyo uye akaputsa maziso erima).
Kutanga, isu tichatanga kunyora dhata kune yedu LUN (kunyora mafaera ane random data). Isu tinobva tangoona kuti nzira yekutaurirana pakati pemasisitimu ekuchengetedza iri kushandiswa. Izvi zviri nyore kunzwisisa kana iwe ukavhura mutoro wekutarisa wezviteshi zvine basa rekudzokorora.
Masisitimu ese ari maviri ekuchengetedza ikozvino ane "anobatsira" data, tinogona kutanga bvunzo.
Zvingoitika, ngatitarisei huwandu hwehashi hweimwe yemafaira tonyora pasi.
Nguva dzose kuchinja basa
Iko kushanda kwekuchinja mabasa (kuchinja mafambiro ekudzokorodza) kunogona kuitwa nechero system yekuchengetedza, asi iwe uchazoda kuenda kune ese, sezvo uchizoda kudzima mepu paPrimary, uye kuigonesa paSekondari (inozove yePrimary. )
Zvichida mubvunzo unonzwisisika unomuka: wadii kuita izvi otomatiki? Mhinduro ndeiyi: zviri nyore, kudzokorora inzira yakapusa yekutsungirira njodzi, yakavakirwa chete pamabasa emaoko. Kuti uite otomatiki aya ma operation, kune metrocluster modhi; inongozviitira otomatiki, asi kumisikidzwa kwayo kwakanyanya kuoma. Isu tichanyora nezve kumisikidza metrocluster muchinyorwa chinotevera.
Pachirongwa chikuru chekuchengetedza, tinodzima mepu kuti tive nechokwadi chekuti kurekodha kunomira.
Zvino pane imwe yemasisitimu ekuchengetedza (hazvina basa, pane hombe kana backup) mu "Remote replication" menyu, sarudza yedu yekubatanidza REPL1 uye tinya "Shandura basa".
Mushure memasekondi mashoma, LUN1R (backup yekuchengetedza system) inova Yekutanga.
Isu tinomepu LUN1R ine yekuchengetedza system2.
Mushure meizvi, yedu E: drive inosungirirwa otomatiki kune muenzi, chete panguva ino "yakasvika" kubva kuLUN1R.
Zvingoitika, isu tinofananidza iyo hash sums.
Sezvineiwo. Muedzo wakapasa.
Failover. Data center kukundikana
Parizvino, iyo huru yekuchengetedza sisitimu mushure mekugara ichichinja ndeye yekuchengetedza system 2 uye LUN1R, zvichiteerana. Kutevedzera tsaona, tinodzima magetsi pane ese ekuchengetedza ma controller2.
Hapasisina nzira yekuiwana.
Ngationei zviri kuitika pane yekuchengetedza system 1 (iyo backup imwe panguva iyoyo).
Isu tinoona kuti Primary LUN (LUN1R) haisipo. Meseji yekukanganisa yakaonekwa mumatanda, mupaneru yeruzivo, uye zvakare mumutemo wekudzokorora pachawo. Saizvozvo, data kubva kune iyo host parizvino haisi kuwanikwa.
Shandura basa reLUN1 kuita Puraimari.
Ndiri kuita mepu kune muridzi.
Ita shuwa kuti drive E inoonekwa pane iyo host.
Isu tinotarisa hashi.
Zvese zvakanaka. Iyo yekuchengetedza sisitimu yakapona nekudonha kwe data data, iyo yaive inoshanda. Nguva yakatarwa yatakapedza tichibatanidza kudzokorodza "kudzoserwa" uye kubatanidza iyo LUN kubva kunzvimbo yekuchengetedza data yaive ingangoita maminetsi matatu. Zviri pachena kuti mukugadzirwa kwechokwadi zvinhu zvese zvakanyanya kuomarara, uye nekuwedzera kune zviito zvine masisitimu ekuchengetedza, iwe unofanirwa kuita mamwe akawanda mashandiro pane network, pane mauto, mumaapplication. Uye muhupenyu nguva iyi ichava yakareba.
Pano ndinoda kunyora kuti zvinhu zvose, muedzo wakapedzwa zvakabudirira, asi ngatirege kukurumidza. Iyo huru yekuchengetedza sisitimu "inonyepa", tinoziva kuti payaka "wa", yaive muPrimary basa. Chii chinoitika kana ikangoerekana yatendeuka? Pachave neaviri maPrimary mabasa, ayo akaenzana nehuwori hwedata? Ngatizviongororei zvino.
Ngatitenderei pakarepo kubatidza pasi pekuchengetedza system.
Iyo inoremedza kwemaminetsi mashoma uye yozodzokera kushumiro mushure menguva pfupi yekuwiriranisa, asi muchikamu cheSekondari.
Zvese zvakanaka. Kuparadzana-uropi hakuna kuitika. Isu takafunga nezve izvi, uye nguva dzose mushure mekudonha sisitimu yekuchengetera inosimuka kuenda kuSekondari, zvisinei nekuti yaive basa ripi "muhupenyu." Iye zvino tinogona kutaura chokwadi kuti iyo data centre yekutadza bvunzo yakabudirira.
Kukundikana kwenzira dzekukurukurirana pakati pe data centers
Basa guru rebvunzo iyi ndere kuve nechokwadi chekuti gadziriro yekuchengetera haitangi kuita zvisinganzwisisike kana ikarasikirwa kwenguva pfupi nzira dzekutaurirana pakati pemagadzirirwo maviri ekuchengetedza uye wozoonekwa zvakare.
Saka. Isu tinobvisa waya pakati pezvigadziriso zvekuchengetedza (ngatifungidzire kuti dzakacherwa neanochera).
PaPrimary tinoona kuti hapana kubatana neSecondary.
KuSecondary tinoona kuti hapana kubatana nePrimary.
Zvese zvinoshanda zvakanaka, uye isu tinoramba tichinyora data kune iyo huru yekuchengetedza system, ndiko kuti, ivo vanovimbiswa kuve vakasiyana neiyo backup, ndiko kuti, ivo "vakaparadzana".
Mumaminitsi mashomanana tino "gadzirisa" nzira yekukurukurirana. Pakangoona masisitimu ekuchengetedza angoonana, kuwiriranisa data kunobva kwaitwa otomatiki. Hapana chinodiwa kubva kumutungamiriri pano.
Pashure penguva yakati, kuwiriranisa kunopedzwa.
Kubatana kwakadzoreredzwa, kurasikirwa kwematanho ekutaurirana hakuna kukonzera chero mamiriro ekukurumidzira, uye mushure mekuchinja, kuwiriranisa kwakaitika otomatiki.
zvakawanikwa
Takaongorora dzidziso - chii chinodiwa uye nei, ndepapi zvakanakira uye kupi zvakaipira. Ipapo isu tinomisikidza synchronous replication pakati peaviri ekuchengetedza masisitimu.
Tevere, bvunzo dzekutanga dzakaitwa kune yakajairwa switching, data center kutadza uye kutadza kwekutaura chiteshi. Muzviitiko zvese, iyo yekuchengetedza system yakashanda zvakanaka. Iko hakuna kurasikirwa kwedata uye mashandiro ekutonga anochengeterwa kushoma kune yemanyorero mamiriro.
Nguva inotevera isu tichaomesa mamiriro acho uye toratidza mashandiro ese aya mantiki mune otomatiki metrocluster mune inoshanda-inoshanda modhi, ndiko kuti, kana ese ari maviri ekuchengetedza masisitimu ari ekutanga, uye hunhu kana yekutadza system yekuchengetera izere otomatiki.
Ndapota nyora mhinduro, tichafara kugamuchira kutsoropodzwa kwakanaka uye mazano anoshanda.
Kusvikira nguva inotevera.
Source: www.habr.com