Store images/videos into Hadoop HDFS -


i store videos/images hadoop hdfs, heard hdfs accepts files text.

to sure, can store videos/images hdfs? if yes, what's way or steps follow that?

it absolutely possible without doing extra. hadoop provides facility read/write binary files. so, practically can converted bytes can stored hdfs(images, videos etc). hadoop provides called sequencefiles. sequencefile flat file consisting of binary key/value pairs. sequencefile provides writer, reader , sorter classes writing, reading , sorting respectively. so, convert image/video file seuencefile , store hdfs. here small piece of code take image file , convert sequencefile, name of file key , image content value :

public class imagetoseq {     public static void main(string args[]) throws exception {          configuration confhadoop = new configuration();              confhadoop.addresource(new path("/hadoop/projects/hadoop-1.0.4/conf/core-site.xml"));         confhadoop.addresource(new path("/hadoop/projects/hadoop-1.0.4/conf/hdfs-site.xml"));            filesystem fs = filesystem.get(confhadoop);         path inpath = new path("/mapin/1.png");         path outpath = new path("/mapin/11.png");         fsdatainputstream in = null;         text key = new text();         byteswritable value = new byteswritable();         sequencefile.writer writer = null;         try{             in = fs.open(inpath);             byte buffer[] = new byte[in.available()];             in.read(buffer);             writer = sequencefile.createwriter(fs, confhadoop, outpath, key.getclass(),value.getclass());             writer.append(new text(inpath.getname()), new byteswritable(buffer));         }catch (exception e) {             system.out.println("exception messages = "+e.getmessage());         }         {             ioutils.closestream(writer);             system.out.println("last line of code....!!!!!!!!!!");         }     } }

and if intention dump files is, :

bin/hadoop fs -put /src_image_file /dst_image_file

and if intent more storing files, might find hipi useful. hipi library hadoop's mapreduce framework provides api performing image processing tasks in distributed computing environment.

hth


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