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RE: Parent/child relation - go vertical, horizontal, or many tables? - HBase - [mail # user]
...Just to chime in with my usual take on this (seems like the tall vs. wide d iscussion happens every few weeks...)  For "get all children of a parent", doing a get() on the wide table vs...
   Author: Jonathan Gray, 2011-02-11, 20:48
RE: CHANGES.txt in trunk vs branch? - HBase - [mail # dev]
...I like the approach Todd outlines, but have been doing it as Stack describe s.  +1 on moving to Todd/Hadoop approach.  In addition, for JIRA, we should pro bably put the fix versio...
   Author: Jonathan Gray, 2011-02-07, 20:56
RE: Master node Question - HBase - [mail # user]
...Unfortunately, this is not the case for the HDFS NameNode.  HDFS does not s upport out-of-the-box backup master nodes.  There are a few different techn iques people use for NameNod...
2 emails [+ more]    Author: Jonathan Gray, 2011-02-07, 19:42
RE: How long can I have a table open? - HBase - [mail # user]
...What's the nature of the stability problems?  These are issues seen server- side or just client-side?  Restarting your long-running clients fixes the issues?  nd th , ave a &n...
2 emails [+ more]    Author: Jonathan Gray, 2011-02-07, 19:36
RE: Amazon EC2 - HBase - [mail # user]
...There are others who have had far more experience than I have with HBase +  EC2, so will let them chime in.  But I personally recommend against this di rection if you expect to hav...
   Author: Jonathan Gray, 2011-02-07, 19:35
RE: Fastest way to read only the keys of a HTable? - HBase - [mail # user]
...If you only need to consider a single column family, use Scan.addFamily() o n your scanner.  Then there will be no impact of the other column families.  e...
   Author: Jonathan Gray, 2011-02-03, 20:15
RE: Region Servers Crashing during Random Reads - HBase - [mail # user]
...How much heap are you running on your RegionServers?  6GB of total RAM is on the low end.  For high throughput applications, I wo uld recommend at least 6-8GB of heap (so 8+ GB of ...
   Author: Jonathan Gray, 2011-02-03, 20:13
RE: doing a scan that will return random columns in a table's family - HBase - [mail # user]
...Result is just the client-side class which wraps whatever the server return s.  The ability to do this query is not really about whether Result has the  methods to get at this data...
   Author: Jonathan Gray, 2011-02-03, 18:18
RE: HBase roadmaps - HBase - [mail # dev]
...+1 on dropping 0.20.7  ....
   Author: Jonathan Gray, 2011-01-21, 06:42
RE: performance regression after hbase restart - HBase - [mail # user]
...In HBase 0.90.0 there is a new "retain assignment" configuration parameter  that makes it so your cluster keeps the same region assignment between full  cluster restarts.  It ...
   Author: Jonathan Gray, 2011-01-21, 03:37
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