What is Cloud Computing – 5 characterstics of a cloud

I have joined the course “https://www.edx.org/course/introduction-cloud-computing-ieeex-cloudintro-x-0” in EDX which is offering excellent reliable reference on cloud definition. Feel free to join this course and learn from the leaders who set the standards to the IT world.

Advertisements

hadoop: distcp

  1. Internal cluster copy between two hdfs folders

hadoop distcp /tmp/output23.txt /demo

2. Internal cluster copy using hdfs url

hadoop distcp hdfs://sandbox:8020/demo hdfs://sandbox:8020/apps

File System Counters
FILE: Number of bytes read=0
FILE: Number of bytes written=640985
FILE: Number of read operations=0
FILE: Number of large read operations=0
FILE: Number of write operations=0
HDFS: Number of bytes read=953979
HDFS: Number of bytes written=948926
HDFS: Number of read operations=179
HDFS: Number of large read operations=0
HDFS: Number of write operations=41
Job Counters
Launched map tasks=5
Other local map tasks=5
Total time spent by all maps in occupied slots (ms)=283995
Total time spent by all reduces in occupied slots (ms)=0
Total time spent by all map tasks (ms)=56799
Total vcore-seconds taken by all map tasks=56799
Total megabyte-seconds taken by all map tasks=58162176
Map-Reduce Framework
Map input records=20
Map output records=0
Input split bytes=575
Spilled Records=0
Failed Shuffles=0
Merged Map outputs=0
GC time elapsed (ms)=1634
CPU time spent (ms)=9360
Physical memory (bytes) snapshot=683446272
Virtual memory (bytes) snapshot=4112478208
Total committed heap usage (bytes)=659030016
File Input Format Counters
Bytes Read=4478
File Output Format Counters
Bytes Written=0
org.apache.hadoop.tools.mapred.CopyMapper$Counter
BYTESCOPIED=948926
BYTESEXPECTED=948926
COPY=20