Fixed Issues in HDFS

This section lists the issues that have been fixed since the previous version.

: This improvement makes HDFS NameNode leave safemode immediately if all blocks have reported in, reducing the cluster startup time.
CDPD-2946: Slow reading and writing of erasure-coded files
The ISA-L library is not packaged with HDFS as a result of which HDFS erasure coding falls back to the Java implementation which is much slower than the native Hadoop implementation. This slows down the reading and writing of erasure-coded files.