Farrokh, The codec org.apache.hadoop.io.compress.crypto.CyptoCodec needs to be used. What you've done so far is merely add it to be loaded by Hadoop at runtime, but you will need to use it in your programs if you wish for it to get applied.
For example, for MapReduce outputs to be compressed, you may run an MR job with the following option set on its configuration: "-Dmapred.output.compression.codec=org.apache.hadoop.io.compress.crypto.CyptoCodec" And then you can notice that your output files were all properly encrypted with the above codec. Likewise, if you're using direct HDFS writes, you will need to wrap your outputstream with this codec. Look at the CompressionCodec API to see how: http://hadoop.apache.org/common/docs/stable/api/org/apache/hadoop/io/compress/CompressionCodec.html#createOutputStream(java.io.OutputStream) (Where your CompressionCodec must be the org.apache.hadoop.io.compress.crypto.CyptoCodec instance). On Tue, Aug 7, 2012 at 1:11 PM, Farrokh Shahriari <[email protected]> wrote: > > Hello > I use "Hadoop Crypto Compressor" from this > site"https://github.com/geisbruch/HadoopCryptoCompressor"; for encryption hdfs > files. > I've downloaded the complete code & create the jar file,Change the propertise > in core-site.xml as the site says. > But when I add a new file,nothing has happened & encryption isn't working. > What can I do for encryption hdfs files ? Does anyone know how I should use > this class ? > > Tnx -- Harsh J
