Xolve Xolve - 6 months ago 230
Java Question

JCIFS: file retrieval is too slow to be usable

I was just testing JCIFS for accessing Windows shares. It is very slow to the point of being completely unusable.

import jcifs.smb.*;

class First {
public static void main(String[] args) throws Exception {
try {
//jcifs.Config.setProperty( "jcifs.netbios.wins", "192.168.1.220" );
NtlmPasswordAuthentication auth = new NtlmPasswordAuthentication("domain.com", "Administrator", "password");

SmbFile f = new SmbFile("smb://10.17.15.12/Share/xml/file.xml", auth);
SmbFileInputStream in = new SmbFileInputStream(f);
byte[] b = new byte[8192];
int n;
while(( n = in.read( b )) > 0 ) {
System.out.write( b, 0, n );
}
} catch (SmbException smbe) {
System.err.println(smbe.getNtStatus());
System.err.println(smbe.toString());
System.err.println(smbe.getCause());
}
}
}


It takes very long time for initial output to come and subsequent reads are also very slow. Any ideas how to use it? Any alternatives by which I can write Java code to access the Windows shares in a portable way are also welcome

Answer

I found here that SmbFileInputStream doesn't do its own buffering and hence the reason for being slow. Wrapping SmbFileInputStream in a BufferedInputStream solved the problem.

 SmbFile sFile = new SmbFile(path, authentication);

 BufferedInputStream buf = new BufferedInputStream(new SmbFileInputStream(sFile));