Ho sebetsa le polokelo ea Apache Cassandra NoSQL?
Ka la 23 May, Odnoklassniki e memela baetsi ba nang le phihlelo ofising ea bona St. Petersburg bakeng sa , e inehetseng ho sebetsa le Apache Cassandra. Se bohlokoa feela ke boiphihlelo ba hau le Cassandra le takatso ea hau ea ho bo arolelana.
Re lokile Apache Cassandra ka 2010 ho boloka lintlha tsa lifoto. Hajoale re basebelisi ba kholo ka ho fetisisa ba Apache Cassandra ho RuNet le e 'ngoe ea tse kholo ka ho fetisisa Europe. Re na le lihlopha tse fetang lekholo tse fapaneng tse sebelisitsoeng ka bobeli ho boloka tlhaiso-leseling e fapaneng ea sehlahisoa - litlelase, lipuisano, melaetsa, le ho laola lintlha tsa bohlokoa tsa meaho - ho etsa limmapa tse hlakileng ho li-disk tsa polokelo e kholo ea binary - , tsamaiso ea data ea ka hare ea leru joalo-joalo.
Ka kakaretso, ka Cassandra e laola li-petabyte tsa data ho pholletsa le li-node tse likete. Nakong ena, re bokelletse boiphihlelo bo boholo ba ho tsamaisa, ho nts'etsapele le ho sebetsa litharollo tse thehiloeng ho Cassandra esita le ho iketsetsa tsa rona. .
Hona joale re rata ho arolelana sena sohle le uena - ho sebelisa linyeoe tsa sebele ho tloha ho itloaetsa le ntle le liphiri; Ketsahalo e tla tšoaroa ka mokhoa oa puisano e phelang pakeng tsa barupeluoa, ho bolelang hore puisano e tla nka boholo ba nako. ba itokiselitse ho arolelana maikutlo le mekhoa ea bona. Ketsahalo e tla tšoaroa ke и .
Lihlooho e tla ba life?
Tšebeliso:
Ha re shebeng meralo e tloaelehileng ea li-node le lihlopha mecheng e fapaneng ea tlhahiso. Re tla tšohla mokhoa oa ho holisa lihlopha ha palo ea data le meroalo e ntse e eketseha le mokhoa oa ho khutlisa li-node tse hlōlehileng ka phello e fokolang bakeng sa bareki. A re arolelaneng bohloko mme re hlophise rake e tsebahalang. A re fumane hore na re ka beha lihlopha joang leihlo e le hore re utloisise esale pele hore na hantle-ntle ke eng e sa sebetseng hantle. Ha re bue ka mathata a ho tsamaisa mefuta e mecha ea Cassandra.
Tshebetso:
Ha re leke ho utloisisa hore na re shebe metrics efe le hore na ke eng e ka fetoloang ho ntlafatsa metrics. Ha re boneng hore na re ikoetlise hape kapa che, 'me haeba ho joalo, joang. Re tla supa litšitiso ho meralo le ts'ebetsong ea Cassandra mme re shebe maqheka a mang a boenjiniere a ho sebetsana le ona. A re ke re ama ka bohloko kamehla tokiso le compaction ntle le tshebetso degradation.
Ho mamella liphoso:
Hardware ha e tšoarelle ka ho sa feleng, kahoo likotsi li etsahala ka linako tsohle, 'me letsoho la mosebetsi-'moho le ka' na la thothomela 'me re tla tlosa lintho tse sa hlokahaleng, kahoo re tla buisana ka ho hlaphoheloa ka mor'a ho hlōleha ha li-disks, mechine kapa litsi tsa data, hammoho le ho khutlela morao ka mokhoa o tsitsitseng. state from backups haeba ho na le liphoso tsa opareitara.
'me u bolelle metsoalle le basebetsi-'moho le uena ka ketsahalo ena.
Source: www.habr.com