Thaum cov ntsiab lus memtable tshaj qhov pib teeb tsa, memtable cov ntaub ntawv, uas suav nrog cov ntsuas ntsuas, muab tso rau hauv kab kom ntws mus rau disk. Koj tuaj yeem teeb tsa qhov ntev ntawm kab los ntawm kev hloov memtable_heap_space_in_mb lossis memtable_offheap_space_in_mb teeb tsa hauv cassandra.
Dab tsi yog Memtable thiab SSTable hauv Cassandra?
SSTable - qhov kawg ntawm cov ntaub ntawv hauv C. Lawv yog cov ntaub ntawv tiag tiag ntawm disk thiab tsis hloov pauv. … Cassandra tseem khaws cov ntaub ntawv nyob rau hauv lub cim xeeb qauv hu ua memtable thiab muab configurable durability. Lub memtable yog sau rov qab cache ntawm cov ntaub ntawv muab faib uas Cassandra ntsia los ntawm tus yuam sij.
Cassandra khaws cov ntaub ntawv sab hauv li cas?
Thaum sau ntawv tshwm sim, Cassandra khaws cov ntaub ntawv hauv lub cim xeeb hu ua memtable, thiab txhawm rau muab kev ruaj ntseg ruaj khov, nws kuj tseem sau rau hauv daim ntawv cog lus ntawm disk. Cov ntawv cog lus tau txais txhua qhov sau ua rau Cassandra node, thiab cov ntawv sau ruaj khov no muaj sia nyob mus ib txhis txawm tias lub zog tsis ua haujlwm ntawm lub node.
Memtable hauv Cassandra yog dab tsi?
Memtable yog an hauv-nco cache nrog cov ntsiab lus khaws cia ua tus yuam sij / kab. Memtable cov ntaub ntawv raug txheeb xyuas los ntawm qhov tseem ceeb; Txhua ColumnFamily muaj qhov sib cais Memtable thiab khaws cov ntaub ntawv kab ke los ntawm tus yuam sij. Cassandra sau yog thawj zaug sau rau CommitLog. Tom qab sau ntawv rau CommitLog, Cassandra sau cov ntaub ntawv rau memtable.
Ua li cas cov ntaub ntawvKev hloov pauv los ntawm Cassandra?
Kev Sau Npe- Thaum twg ib qho kev sau ntawv raug tswj hwm los ntawm Cassandra, cov ntaub ntawv tau sau ib txhij rau Memtable & Commit Log. Lub hom phiaj tseem ceeb ntawm Commit Log yog rov tsim dua Memtable yog tias lub pob tau poob, Commit Log yog cov ntaub ntawv tiaj tus uas tau tsim ntawm Disk. … yaml file.
