Hi, If I understand HBase's architecture correctly, it is only the WAL that needs to be placed on a SSD to make writes perform better?
Because a write comes to a region server, then goes to the WAL and memstore. If the WAL is on SSD on this node and 2 other DataNodes, then the append writes will finish much faster, right? So, is there a way in HDFS to tell it to only put the HBase WALs (/hbase/.logs/) on a SSD disk and to keep the other HFiles on traditional spinning disks?
