Cov txheej txheem:
Video: Koj nkag siab dab tsi los ntawm cov txheej txheem ntau yam?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Multiversion Concurrency Control. Multiversion Concurrency Control (MVCC) yog ib txoj hauv kev los tswj qhov sib xws ntawm cov ntaub ntawv nkag los ntawm ntau cov neeg siv concurrently. MVCC siv lub snapshot rho tawm lav uas ua kom ntseeg tau tias txhua qhov kev sib pauv ib txwm pom cov ntaub ntawv zoo ib yam.
Yog li, dab tsi yog cov txheej txheem tswj hwm kev sib koom ua ke?
Lub kaw lus tswj hwm kev sib koom ua ke tuaj yeem siv ib-theem lossis ob-theem locking raws tu qauv
- Ib-theem Xauv raws tu qauv.
- Ob-theem Xauv raws tu qauv.
- Distributed Ob-theem Locking Algorithm.
- Distributed Timestamp Concurrency Control.
- Cov duab tsis sib haum xeeb.
- Distributed Optimistic Concurrency Control Algorithm.
Tsis tas li ntawd, Multiversion schemes hauv DBMS yog dab tsi? Abstract. Concurrency tswj tswv yim siv ntau lub versions ntawm cov ntaub ntawv khoom yog nthuav tawm uas tso cai rau nce concurrency. Cov tswv yim muab qhov tsim nyog version rau txhua qhov kev thov nyeem. Kev ua lag luam muab cov ntawv thov uas tuaj yeem rhuav tshem cov ntaub ntawv ncaj ncees raug rho tawm.
Tsis tas li ntawd, dab tsi yog kev tswj hwm kev tswj hwm hauv DBMS?
Concurrency tswj yog tus txheej txheem hauv DBMS rau kev tswj hwm kev ua haujlwm ib txhij tsis muaj kev sib cav sib ceg. Kev nkag mus tau yooj yim heev yog tias txhua tus neeg siv tsuas yog nyeem cov ntaub ntawv. Concurrency tswj yog siv los daws cov kev tsis sib haum xeeb uas feem ntau tshwm sim nrog ntau tus neeg siv.
Multi Version Concurrency Control hauv postgresql yog dab tsi?
MVCC, uas sawv cev rau multiversion concurrency tswj , yog ib qho ntawm cov txheej txheem tseem ceeb Postgres siv los ua kev lag luam. MVCC tso Postgres khiav ntau cov lus nug uas kov tib kab ib txhij, thaum khaws cov lus nug cais tawm ntawm ib leeg.
Pom zoo:
Dab tsi yog qhov tsis zoo ntawm cov txheej txheem txheej txheem?
Ib qho tsis zoo ntawm kev siv Procedural Programming raws li ib txoj hauv kev programming yog qhov tsis muaj peev xwm rov siv tau cov lej thoob plaws hauv qhov program. Yuav tsum rov sau tib hom code ntau zaus thoob plaws ib qho kev pab cuam tuaj yeem ntxiv rau tus nqi tsim kho thiab lub sijhawm ntawm qhov project. Lwm qhov tsis zoo yog qhov nyuaj ntawm kev kuaj xyuas yuam kev
Dab tsi yog lub tswv yim los tswj cov kev txwv ntawm kev nkag mus ntawm cov peev txheej thaum ntau cov xov raug tua hauv Redis?
xauv Khaws qhov no hauv kev txiav txim siab, Redis ua li cas nrog kev sib raug zoo? Ib qho kev pabcuam ib leeg tuaj yeem muab tau sib npaug ntawm I / O qib los ntawm kev siv I / O (de) multiplexing mechanism thiab lub voj xwm txheej (uas yog dab tsi Redis ua ).
Dab tsi yog cov kev pabcuam muab rau txheej txheej network los ntawm cov ntaub ntawv txuas txheej?
Cov kev pabcuam tseem ceeb yog hloov cov ntaub ntawv pob ntawv los ntawm txheej txheej network ntawm lub tshuab xa mus rau txheej txheej network ntawm lub tshuab txais. Hauv kev sib txuas lus tiag tiag, cov ntaub ntawv txuas txheej xa cov khoom ntawm lub cev thiab lub cev nruab nrab
Dab tsi ntawm cov hauv qab no yog hais txog cov txheej txheem ntawm tus kheej muaj cov kev pabcuam uas sib txuas lus los tsim ib daim ntawv thov software ua haujlwm?
Ib qho kev pabcuam-oriented architecture yog teeb tsa cov kev pabcuam tus kheej uas sib txuas lus nrog ib leeg los tsim ib daim ntawv thov software ua haujlwm. Nyob rau hauv ib tug ntau-tiered network: kev ua hauj lwm ntawm tag nrho cov network yog sib npaug ntawm ntau theem ntawm servers
Dab tsi yog qhov haujlwm ntawm OSI txheej txheej txheej txheej txheej txheem router ua haujlwm li cas?
Hauv Cov Qauv Qhib Kev Sib Txuas Sib Txuas (OSI) kev sib txuas lus, txheej txheej txheej txheem nyob ntawm Txheej 5 thiab tswj kev teeb tsa thiab rhuav tshem ntawm kev sib txuas ntawm ob qhov kev sib txuas lus kawg. Kev sib txuas lus ntawm ob qhov kawg yog hu ua kev sib txuas