Video: SQL ib txwm nyob ntawm pawg yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Taw qhia. SQL ntawv Server Ib txwm On yog ib qho yooj yim tsim kev daws teeb meem los muab siab muaj ( HA ) thiab kev puas tsuaj (DR). Nws yog tsim los ntawm Windows Failover Pawg , tab sis peb tsis xav tau kev sib koom cia ntawm qhov tsis ua haujlwm pawg nodes. Tag nrho cov nodes koom yuav tsum yog ib feem ntawm qhov ua tsis tiav pawg.
Khaws qhov no hauv kev xav, dab tsi yog SQL ib txwm nyob?
SQL ntawv Server AlwaysOn muab ib tug high-muaj peev xwm thiab Disaster-recovery daws rau SQL ntawv Server 2012. Nws ua rau kev siv uas twb muaj lawm SQL ntawv Server nta, tshwj xeeb yog Failover Clustering, thiab muab cov peev txheej tshiab xws li pab pawg muaj. Nws aims muab ntau granular tswj kom ua tiav High Availability.
Qhov thib ob, dab tsi yog pawg hauv SQL? Ib Microsoft SQL ntawv Server Pawg tsis muaj dab tsi ntau tshaj li kev sau ntawm ob lossis ntau lub cev servers nrog kev nkag mus rau qhov sib koom ua ke uas muab cov khoom siv disk xav tau los khaws cov ntaub ntawv database. Cov servers no raug xa mus rau "nodes".
Qhov sib thooj, puas yog ib txwm xav tau pawg?
Ib txwm Ntawm cov pab pawg muaj, cov kev muaj siab thiab kev puas tsuaj rov qab los hauv SQL Server 2012 (11. x), xav tau Windows Server Failover Ua pawg (WSFC).
Qhov txawv ntawm AlwaysOn thiab pawg hauv SQL Server yog dab tsi?
Lub ntsiab txawv yog a pawg piv txwv muaj tib binaries ntsia thiab teeb tsa ntawm ob lossis hom pawg nodes (lub cev los yog virtual tshuab) thiab cov ntaub ntawv database yog zaum ntawm ib qho kev sib koom disk. Nrog Pab Pawg Availability, ob lossis ntau daim ntawv theej ntawm tib lub database yog synchronized hla ntau cov nodes.
Pom zoo:
Dab tsi yog qhov sib txawv ntawm pab pawg cov ntaub ntawv thiab cov ntaub ntawv tsis yog pawg?
Ob leeg yog cov ntaub ntawv muaj txiaj ntsig ntawm cov ntaub ntawv tab sis qhov sib txawv ntawm lawv yog cov ntaub ntawv tsis muaj ntaub ntawv yog rawdata. Qhov no txhais tau hais tias nws nyuam qhuav tau sau tab sis tsis txheeb rau hauv ib pawg lossis cov chav kawm. Ntawm qhov tod tes, groupeddata yog cov ntaub ntawv uas tau teeb tsa ua pawg los ntawm cov ntaub ntawv nyoos
Qhov chaw nyob ntawm lub cev thiab qhov chaw nyob qhov chaw nyob yog dab tsi?
Qhov sib txawv yooj yim ntawm Logical thiab lub cev chaw nyob yog qhov chaw nyob Logical yog tsim los ntawm CPU hauv kev xav ntawm ib qho kev pab cuam. Ntawm qhov tod tes, qhov chaw nyob ntawm lub cev yog qhov chaw nyob uas muaj nyob hauv lub cim xeeb. Cov txheej txheem ntawm txhua qhov chaw nyob uas tsim los ntawm CPU fora program hu ua Logical Address Space
Dab tsi yog qhov txawv ntawm cov pab pawg thiab cov pab pawg tawm?
Nyob rau hauv sociology thiab kev puas siab puas ntsws, ib pab pawg neeg yog ib pawg neeg sib raug zoo uas tus neeg puas siab puas ntsws qhia tias yog ib tug tswv cuab. Los ntawm qhov sib txawv, ib pab pawg tawm yog ib pawg neeg sib raug zoo uas ib tus neeg tsis txheeb xyuas
Dab tsi yog qhov txawv ntawm ib pawg kev ruaj ntseg thiab pab pawg faib khoom?
Pawg Kev Ruaj Ntseg-Cov pab pawg siv los tiv thaiv kev nkag mus rau hauv kev siv network los ntawm kev tso cai; lawv kuj tuaj yeem siv los xa email. Distribution Groups-Cov pab pawg uas tsuas yog siv tau los xa email xwb; lawv muaj kev koom tes ruaj khov uas tsis tuaj yeem siv los nkag mus rau cov peev txheej network
Lub luag haujlwm ntawm pawg pawg yog dab tsi?
Ua haujlwm nrog Lub Luag Haujlwm hauv Failover Cluster Manager. Txhua lub tshuab virtual muaj ntau tau suav tias yog lub luag haujlwm hauv Failover Clustering terminology. Lub luag haujlwm suav nrog cov khoom tiv thaiv nws tus kheej nrog rau cov txheej txheem siv los ntawm Failover Clustering rau kev teeb tsa thiab lub xeev cov ntaub ntawv hais txog cov khoom tiv thaiv