Hello there, I designed a row key for queries that need best performance (~100 ms) which looks like this:
userId-date-sessionId These queries(scans) are always based on a userId and sometimes additionally on a date, too. That's no problem with the key above. However, another kind of queries shall be based on a given time range whereas the outermost left userId is not given or known. In this case I need to get all rows covering the given time range with their date to create a daily reporting. As I can't set wildcards at the beginning of a left-based index for the scan, I only see the possibility to scan the index of the whole table to collect the rowKeys that are inside the timerange I'm interested in. Is there a more elegant way to collect rows within time range X? (Unfortunately, the date attribute is not equal to the timestamp that is stored by hbase automatically.) Could/should one maybe leverage some kind of row key caching to accelerate the collection process? Is that covered by the block cache? Thanks in advance for any advice. regards Chris
