Cov txheej txheem:

Dab tsi yog deadlock koj yuav ua li cas zam nws?
Dab tsi yog deadlock koj yuav ua li cas zam nws?

Video: Dab tsi yog deadlock koj yuav ua li cas zam nws?

Video: Dab tsi yog deadlock koj yuav ua li cas zam nws?
Video: Ua Li Ntawv Tsis Yog - David Yang Ft. Keeneng Vang (Official Lyrics Video) 2024, Kaum ib hlis
Anonim

Deadlocks tuaj yeem tiv thaiv los ntawm kev tiv thaiv tsawg kawg yog ib qho ntawm plaub yam uas yuav tsum tau muaj:

  1. 7.4.1 Kev Sib Koom Tes. Muab cov peev txheej xws li cov ntaub ntawv nyeem nkaus xwb ua tsis lead rau deadlocks .
  2. 2 Tuav thiab Tos.
  3. 3 Tsis muaj preemption.
  4. 4 Lub voj voog tos.

Ntawm no, dab tsi yog deadlock thiab yuav tiv thaiv li cas?

Hauv computer science, kev tuag kev tiv thaiv algorithms yog siv nyob rau hauv concurrent programming thaum ntau cov txheej txheem yuav tsum tau ntau tshaj ib qho kev pab. A kev tuag kev tiv thaiv algorithm npaj cov kev pab cuam los ntawm txhua tus txheej txheem los xyuas kom meej tias yam tsawg kawg ib txheej txheem ib txwm muaj peev xwm tau txais tag nrho cov peev txheej uas nws xav tau.

Tsis tas li ntawd, peb yuav ua li cas kom tsis txhob muaj kev cuam tshuam hauv DBMS? Deadlock hauv DBMS

  1. Deadlock Avoidance - Thaum lub database yog daig nyob rau hauv ib tug deadlock, Nws yog ib txwm zoo dua kom tsis txhob lub deadlock es tsis txhob restarting los yog rho tawm cov database.
  2. Deadlock Detection -
  3. Tos-for-graph yog ib txoj hauv kev los xyuas qhov xwm txheej deadlock.
  4. Kev tiv thaiv Deadlock -

Kuj paub, dab tsi yog deadlock piav nrog piv txwv?

A kev tuag yog ib qho xwm txheej uas ob lub khoos phis tawj sib koom sib koom ua ke tau zoo tiv thaiv ib leeg los ntawm kev nkag mus rau cov peev txheej, ua rau ob qho kev pabcuam tsis ua haujlwm. Qhov no coj mus rau qhov teeb meem ntawm lub kev tuag . Ntawm no yog qhov yooj yim tshaj plaws piv txwv : Program 1 thov cov peev txheej A thiab tau txais nws.

Dab tsi yog cov yam ntxwv ntawm kev tuag?

Qhov xwm txheej deadlock tuaj yeem tshwm sim yog tias plaub yam hauv qab no tuav ib txhij hauv ib qho system:

  • Kev sib nrig sib cais. Yam tsawg kawg ib qho peev txheej yuav tsum tau tuav hauv hom tsis sib koom; uas yog, tsuas yog ib txheej txheem ntawm ib lub sij hawm tuaj yeem siv cov peev txheej.
  • Tuav thiab tos.
  • Tsis muaj preemption.
  • Lub voj voog tos.

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