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[HBASE-10212] New rpc metric: number of active handler - HBase - [issue]
...The attached patch adds a new metric: number of active handler threads. We found this is a good metric to measure how busy of a server. If this number is too high (compared to the total numb...
http://issues.apache.org/jira/browse/HBASE-10212    Author: Chao Shi, 2014-05-20, 15:17
[HBASE-9969] Improve KeyValueHeap using loser tree - HBase - [issue]
...LoserTree is the better data structure than binary heap. It saves half of the comparisons on each next(), though the time complexity is on O(logN).Currently A scan or get will go through two...
http://issues.apache.org/jira/browse/HBASE-9969    Author: Chao Shi, 2014-03-25, 05:36
[HBASE-10305] Batch update performance drops as the number of regions grows - HBase - [issue]
...In our use case, we use a small number (~5) of proxy programs that read from a queue and batch update to HBase. Our program is multi-threaded and HBase client will batch mutations to each RS...
http://issues.apache.org/jira/browse/HBASE-10305    Author: Chao Shi, 2014-01-10, 19:06
[HBASE-9811] ColumnPaginationFilter is slow when offset is large - HBase - [issue]
...Hi there, we are trying to migrate a app from MySQL to HBase. One kind of the queries is pagination with large offset and small limit. We don't have too many such queries and so both MySQL a...
http://issues.apache.org/jira/browse/HBASE-9811    Author: Chao Shi, 2013-12-03, 21:38
[HBASE-8884] Pluggable RpcScheduler - HBase - [issue]
...Today, the RPC scheduling mechanism is pretty simple: it execute requests in isolated thread-pools based on their priority. In the current implementation, all normal get/put requests are usi...
http://issues.apache.org/jira/browse/HBASE-8884    Author: Chao Shi, 2013-10-28, 17:09
[HBASE-9683]  Port HTrace support to 0.94 - HBase - [issue]
...Port HTrace (HBASE-6524) to 0.94. This patch includes a wire-format change on writable RPC. It serializes the traceID and spanID in class Invocation. This should be compatible with old versi...
http://issues.apache.org/jira/browse/HBASE-9683    Author: Chao Shi, 2013-10-18, 18:29
[HBASE-8802] totalCompactingKVs may overflow - HBase - [issue]
...I happened to get a very large region (mistakely bulk loading tons of HFile into a signle region). When it's getting compacted, the webUI shows a overflow totalCompactingKVs. I found this is...
http://issues.apache.org/jira/browse/HBASE-8802    Author: Chao Shi, 2013-09-23, 20:28
[HBASE-9101] Addendum to pluggable RpcScheduler - HBase - [issue]
...This patch fixes the review comments from stack and a small fix: Make RpcScheduler fully pluggable. One can write his/her own implementation and add it to classpath and specify it by config ...
http://issues.apache.org/jira/browse/HBASE-9101    Author: Chao Shi, 2013-09-14, 04:38
[HBASE-9444] EncodedScannerV2#isSeeked does not behave as described in javadoc - HBase - [issue]
...I hit this when my tool is scanning HFiles using the scanner. I found isSeeked behaves different whether the HFiles are prefix-encoded or not.There is a test case in my patch that demonstrat...
http://issues.apache.org/jira/browse/HBASE-9444    Author: Chao Shi, 2013-09-11, 14:42
[expand - 4 more] - Re: Delete all data before a given timestamp - HBase - [mail # user]
...Yes, this is what we did now. We maintained a lower bound of timestamp for scan. Once an index build is done, we increase it to a higher value.   On Wed, Jul 17, 2013 at 2:50 AM, Jimmy ...
   Author: Chao Shi, 2013-07-17, 03:35
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NEW: Monitor These Apps!
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