SSAS update the cube while the underlying data is updating -


can underlying data being used ssas cube updating while cube updating?

we process our cube in full once week clean (process update , process indexes during week). however, there demand process data in full more once. data warehouse has daily jobs update data , our full cube process takes 24 hours. stage our daily updates after jobs , full cube processing done in way avoid colliding data load jobs. but, if meet demand of processing data more once, run times when data warehouse updating.

does cause cube processing take longer waits underlying data changes stop? or, grab snapshot goes?

thank you!

the default standard read-locks. can verify in datasource cube - it'll "read committed" isolation level. means it'll take locks , release them reads. if data modified after read starts, may included in cube process if row hasn't been read yet.

have considered either snapshot isolation, or setting database read committed snapshot mode? did latter dw , haven't looked back. have cube process incrementally after regular etl loads, , rcs can sql queries against dw while etl loading (readers don't block writers).


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