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RE: question on indexes in RDBMS vs. noSQL self created indexes...(disk space wise) - HBase - [mail # user]
... Correct.  Nulls take up no space.   Secondary indexes in an RDBMS use additional space.  Primary indexes may no t depending on the db.  s  Designs will most li...
   Author: Jonathan Gray, 2010-12-22, 01:44
RE: Jean-Daniel: RE: some data replication support in hbase? - HBase - [mail # user]
...Seems like hooking into replication would be a good approach.  There's also a JIRA open about a changes API.  https://issues.apache.org/ji ra/browse/HBASE-3247  Or you could u...
   Author: Jonathan Gray, 2010-12-21, 21:30
RE: 0.90.0RC2 tomorrow? - HBase - [mail # dev]
...+1 on RC  re k up if ason...
   Author: Jonathan Gray, 2010-12-21, 06:08
RE: partitioning and map/reduce &hbase hashcodes - HBase - [mail # user]
...HBase doesn't hashcode anything.  It does strict lexicographical ordering o f the row keys themselves.  So yes, keys with similar prefixes may be in th e same partition / next to e...
   Author: Jonathan Gray, 2010-12-19, 19:33
RE: Facebook Messages Team Tech Talk - HBase - [mail # user]
...Article in The Register... http://www.theregister.co.uk/2010/12/17/facebook _messages_tech/  ...
   Author: Jonathan Gray, 2010-12-17, 23:33
[expand - 1 more] - RE: Cluster Size/Node Density - HBase - [mail # user]
...You meant 15TB/45TB right?  Your numbers seem in the realm of possibility.  You should try it out on yo ur 10 node cluster if you can.  I've done applications like this in the...
   Author: Jonathan Gray, 2010-12-17, 22:46
[expand - 4 more] - RE: question about multi-transaction queries - HBase - [mail # user]
...Have you looked at the thrift support?  Plenty of people are using HBase fr om PHP via Thrift.  I don't think there is MultiPut or MultiGet support but there is work curre ntly und...
   Author: Jonathan Gray, 2010-12-17, 22:26
[expand - 3 more] - RE: Results from a Map/Reduce - HBase - [mail # user]
...If you do aggregation, your queries will most likely be well under a second .  The aggregates should reduce the amount of data that needs to be read by  several orders of magnitude...
   Author: Jonathan Gray, 2010-12-17, 22:25
RE: [RFC] Deployment layout and server configurations - HBase - [mail # user]
...Hey Imran,  This looks reasonable but it's hard to say without knowing what the read/wr ite workload is like.  You say all searches are done using Solr... will tha t also be hosted...
   Author: Jonathan Gray, 2010-12-17, 06:11
RE: Recommended setup for a small cluster - HBase - [mail # user]
...That sounds right.  One node would have NN, HMaster, and ZK.  Others would  have DN and RS.  You could put the SNN on any of the slave nodes I suppose.  se...
   Author: Jonathan Gray, 2010-12-15, 06:19
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