You insert 500 rows with key "x" And 1000 rows with key "y" You make a query getting all rows. It will only show two rows, the ones with the latest timestamps. /Justus
Från: Rana Aich [mailto:[email protected]] Skickat: den 29 juli 2010 08:23 Till: [email protected] Ämne: Re: Consequences of Cassandra key NOT unique Thanks for your reply! I thought in that case a new row would be inserted with a new timestamp and cassandra will report the new row. But how this will affect my range query? It would not affect it. On Wed, Jul 28, 2010 at 7:03 PM, Benjamin Black <[email protected]<mailto:[email protected]>> wrote: If you write new data with a key that is already present, the existing columns are overwritten or new columns are added. There is no way to cause a duplicate key to be inserted. On Wed, Jul 28, 2010 at 6:16 PM, Rana Aich <[email protected]<mailto:[email protected]>> wrote: > Hello, > I was wondering what may the pitfalls in Cassandra when the Key value is not > UNIQUE? > Will it affect the range query performance? > Thanks and regards, > raich > >
