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[expand - 1 more] - Re: Downsides of not using any sink groups - Flume - [mail # user]
...In my case the sinks are pointing to a group of machines so one of these may go down leaving others running. Without sink groups in this case there will not be no backoff but seems that it w...
   Author: Pankaj Gupta, 2013-08-23, 07:46
Re: Architectural questions - Flume - [mail # user]
...Hi Hari,  Just curios about the performance improvement, can you provide the number of the JIRA that improves performance in 1.3.1?  Thanks, Pankaj   On Wed, Aug 14, 2013 at 2...
   Author: Pankaj Gupta, 2013-08-18, 05:50
[expand - 12 more] - Re: Lock contention in FileChannel - Flume - [mail # user]
...I am getting very good performance by removing the groups altogether and keeping a high number of total sinks (64). If I organize sinks into groups of 4 I loose parallelism and don't get as ...
   Author: Pankaj Gupta, 2013-08-15, 06:04
[expand - 4 more] - Re: Configuring flume for better throughput - Flume - [mail # user]
...Also, agent1.sinks.hdfs-sink1-1.hdfs.threadsPoolSize = 1, might seem odd but we only write to one file on HDFS per sink, so 1 seems to be the right value. In any case, I've tried increasing ...
   Author: Pankaj Gupta, 2013-08-01, 02:24
[expand - 5 more] - Re: Questions about HBase - HBase - [mail # user]
...I'm not sure what caused so many index block misses. At the time I ran the experiment had over 12 GB of RAM assigned to block cache. My understanding is that since I had restarted HBase befo...
   Author: Pankaj Gupta, 2013-06-06, 02:52
Re: Getting less write throughput due to more number of columns - HBase - [mail # user]
...Would prefix compression (https://issues.apache.org/jira/browse/HBASE-4676) improve this?   This is an important question in terms of schema design. Given the choice of storing a value ...
   Author: Pankaj Gupta, 2013-03-28, 14:26
[expand - 1 more] - Re: Does HBase RegionServer benefit from OS Page Cache - HBase - [mail # user]
...Thanks a lot for the explanation. It's good to know that MSlab is stable and safe to enable (we don't have it enable right now, we're using 0.92). This would allow us to more freely allocate...
   Author: Pankaj Gupta, 2013-03-24, 00:31
[expand - 1 more] - Re: querying data on the basis of timestamp - HBase - [mail # user]
...Hi Ted,  Thanks for the response, it does look very relevant. Here's my understanding, (looking at the relevant code in the patch and around it): Each StoreFile knows the range of value...
   Author: Pankaj Gupta, 2013-03-15, 14:05
Flume HDFS Sink using indexed LZO - Flume - [mail # user]
...Hi,  Is it possible to have Flume HDFS Sink write to HDFS in indexed LZO format. I see in documentation that there is support for LZO but is that LZO indexed. My use case is to write in...
   Author: Pankaj Gupta, 2012-12-06, 19:04
Changing hadoop configuration without restarting service - MapReduce - [mail # user]
...Hi,  Is it possible to change hadoop configuration files such as core-site.xml and get the changes take effect without having to restart hadoop services?  Thanks, Pankaj...
   Author: Pankaj Gupta, 2012-12-03, 23:59
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