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Re: Getting intermittent errors while insertind data into HBase - HBase - [mail # user]
...Why spring? Why a DAO?I’m not suggesting that using Spring or a DAO is wrong, however, you really should justify it. Since it looks like you’re trying to insert sensor data (based on the nam...
   Author: Michael Segel, 2015-05-21, 12:15
Re: Scan vs Get - HBase - [mail # user]
...C’mon, really? Do they really return the same results? Let me put it this way… are you walking through the same code path?  ...
   Author: Michael Segel, 2015-05-20, 02:56
[expand - 2 more] - Re: Ruby shell versions for HBase 2.0 - HBase - [mail # dev]
...So… Silly question… Do you really need to worry about backward’s compatibility? How many people have customized HBaseShell ? What are the common customizations and if you port HBase shell, h...
   Author: Michael Segel, 2015-05-13, 17:06
[expand - 1 more] - Re: MR against snapshot causes High CPU usage on Datanodes - HBase - [mail # user]
...Without knowing your exact configuration… The High CPU may be WAIT IOs,  which would mean that you’re cpu is waiting for reads from the local disks. What’s the ratio of cores (physical)...
   Author: Michael Segel, 2015-05-13, 17:01
[expand - 1 more] - Re: Regions and Rowkeys - HBase - [mail # user]
...Yeah, its about time.What a slacker! :-P ...
   Author: Michael Segel, 2015-05-12, 13:21
Re: Mapping Over Cells - HBase - [mail # user]
...How large is the max file size? How large are your regions? How much memory are you allocating to your region server? How many rows are too large that cause the OOM error? The key is trying ...
   Author: Michael Segel, 2015-05-11, 22:52
Re: transaction management - HBase - [mail # dev]
...I think you need to spend more time thinking through HBase-10070. You may end up creating more problems than  you solve. But more to the point, OP is asking for managing transactions ac...
   Author: Michael Segel, 2015-05-11, 01:02
Re: How to Restore the block locality of a RegionServer ? - HBase - [mail # user]
...First, understand why you had to create an ‘auto restart’ script. Taking down HBase completely (probably including zookeeper) and do a full restart would probably fix the issue of data local...
   Author: Michael Segel, 2015-05-09, 22:37
Re: MapReduce on Sanpshots - HBase - [mail # user]
..."WARNING: This feature bypasses HBase-level security completely since the files are read from the hdfs directly. The user who is running the scan / job has to have read permissions to the da...
   Author: Michael Segel, 2015-05-08, 18:24
[expand - 2 more] - Re: RowKey hashing in HBase 1.0 - HBase - [mail # user]
...Jeremy, I think you have to be careful in how you say things. While over time, you’re going to get an even distribution, the hash isn’t random. Its consistent so that hash(x) = y  and w...
   Author: Michael Segel, 2015-05-07, 02:03
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elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB