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[HBASE-10659] [89-fb] Optimize the threading model in HBase write path - HBase - [issue]
...Recently, we have done multiple prototypes to optimize the HBase (0.89)write path. And based on the simulator results, the following model is able to achieve much higher overall throughput w...
http://issues.apache.org/jira/browse/HBASE-10659    Author: Liyin Tang, 2014-03-06, 01:41
[HBASE-7193] [89-fb] Print the detail exceptions info from the RetriesExhaustedException - HBase - [issue]
...The hbase client only prints the name of exception for the RetriesExhaustedException logging purpose, which failed to provide any useful debug information.So this jira is to enhance the logg...
http://issues.apache.org/jira/browse/HBASE-7193    Author: Liyin Tang, 2014-03-05, 10:55
[HBASE-10502] [89-fb] ParallelScanner: a client utility to perform multiple scan requests in parallel. - HBase - [issue]
...ParallelScanner is a utility class for the HBase client to perform multiple scan requests in parallel. It requires all the scan requests having the same caching size for the simplicity purpo...
http://issues.apache.org/jira/browse/HBASE-10502    Author: Liyin Tang, 2014-02-11, 18:58
[HBASE-10360] [89-fb] Expose the HRegionLocations for each HTable in an efficient way - HBase - [issue]
...HTable.getHRegionInfo() will return all the RegionServer address for each HRegion by scanning the META table. Actually, the HConnectionManger could cache these data and refresh the client lo...
http://issues.apache.org/jira/browse/HBASE-10360    Author: Liyin Tang, 2014-01-16, 01:39
[HBASE-10342] RowKey Prefix Bloom Filter - HBase - [issue]
...When designing HBase schema for some use cases, it is quite common to combine multiple information within the RowKey. For instance, assuming that rowkey is constructed as md5(id1) + id1 + id...
http://issues.apache.org/jira/browse/HBASE-10342    Author: Liyin Tang, 2014-01-15, 18:49
[HBASE-10275] [89-fb] Guarantee the sequenceID in each Region is strictly monotonic increasing - HBase - [issue]
...HBASE-8741 has implemented the per-region sequence ID. It would be even better to guarantee that the sequencing is strictly monotonic increasing so that HLog-Based Async Replication is able ...
http://issues.apache.org/jira/browse/HBASE-10275    Author: Liyin Tang, 2014-01-15, 06:25
[HBASE-10083] [89-fb] Better error handling for the compound bloom filter - HBase - [issue]
...When RegionServer failed to load a bloom block from HDFS due to any timeout or other reasons, it threw out the exception and disable the entire bloom filter for this HFile. This behavior doe...
http://issues.apache.org/jira/browse/HBASE-10083    Author: Liyin Tang, 2013-12-05, 00:47
[HBASE-10009] Fix potential OOM exception in HTableMultiplexer - HBase - [issue]
...HTableMultiplexer is our thread safe non-blocking api. HTableMultiplexer.getHTable is supposed to cache HTable instance, but it fails to do so if it is called on a table with same name but a...
http://issues.apache.org/jira/browse/HBASE-10009    Author: Liyin Tang, 2013-11-20, 03:24
[HBASE-7266] [89-fb] Using pread for non-compaction read request - HBase - [issue]
...There are 2 kinds of read operations in HBase: pread and seek+read.Pread, positional read, is stateless and create a new connection between the DFSClient and DataNode for each operation. Whi...
http://issues.apache.org/jira/browse/HBASE-7266    Author: Liyin Tang, 2013-09-11, 18:04
[HBASE-5032] Add other DELETE type information into the delete bloom filter to optimize the time range query - HBase - [issue]
...To speed up time range scans we need to seek to the maximum timestamp of the requested range,instead of going to the first KV of the (row, column) pair and iterating from there. If we don't ...
http://issues.apache.org/jira/browse/HBASE-5032    Author: Liyin Tang, 2013-08-07, 19:12
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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