Support for using faster storage for write-ahead log
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Key: HBASE-4056
URL: https://issues.apache.org/jira/browse/HBASE-4056
Project: HBase
Issue Type: New Feature
Reporter: Praveen Kumar
Priority: Minor
On clusters with heterogeneous storage components like hard drives and flash
memory, it could be beneficial to use flash memory for write-ahead log. This
can be accomplished by using client side mount table support (HADOOP-7257) that
is offered by HDFS federation (HDFS-1052) feature. One can define two HDFS
namespaces (faster and slower), and configure HBase to use faster storage
namespace for storing WAL.
This is an abstract task that captures the idea. More brainstorming and
subtasks identification to follow.
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