Hi all,
I'm thinking of to switch from RDBMS to No-SQL database, but having lots of
unanswered questions in my mind.
Please correct me if I'm wrong, is Hbase not suitable for small environments?
Like if we have 1 million records with no cluster or maybe 2 machines, is it
not required?
As far as I know, Hbase does not support querying, but having Pig to perform
SQL like queries. It is multi dimensional hashmap distributed across the
network to be accessed fast by key. So if we need to query something then we
need to index it by ourselves.
1) If we have a user list, and a potential "Give me all people above/beyond age
30" query, then do we need to create an index from the beginning of the first
data as:
above_30_list : value: [ A, B, C ]beyond_30_list :value: [ X, Y, Z ] ?
2) What if we need just people at age 45. Then do we need to get all above_30
and scan each of them one by one?
3) If we need so many various queries, then should we create such keys as I
wrote above for all potential queries? And entering the data to all that
indexes when inserting.
4) Parallelizing across clusters to share scanning is what HBase or Map Reduce
technique does to solve this issue?
In short words, I'm willing to switch Hbase for my applications, and wondering
how can I do all these kind of operations in HBase with better performance than
I do in RDBMSs.
Thanks so much.
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