Hi,
+-From: Boris Klug <[email protected]> --
|_Date: Fri, 06 Aug 2010 15:22:41 +0200 ____
|
|The only problem we have is a performance issue: When you execute
|a command on Unix using the ChannelExcec which generates a big
|output and you read these output, it takes a long time. E.g. a
|"cat filename" for a 5 mb file takes about 17 seconds. When you
|transfer the same file with sftp (ChannelSftp), the transfer takes
|under 1 second.
I have tried them, but I have not found such a long delay
with using ChannelExec.
Is it possible to show me your code to get the result from "cat filename"?
Here is a chunk of my code for "cat filename",
...
Channel channel = null;
channel=session.openChannel("exec");
((ChannelExec)channel).setCommand( "cat filename" );
ByteArrayOutputStream baos = new ByteArrayOutputStream();
channel.setOutputStream( baos );
long start = System.currentTimeMillis();
channel.connect();
while(true){
if(channel.isClosed()){
break;
}
try{Thread.sleep( 10 );}catch(Exception ee){}
}
System.out.println(System.currentTimeMillis() - start);
System.out.println(baos.size());
channel.disconnect();
Sincerely,
--
Atsuhiko Yamanaka
JCraft,Inc.
1-14-20 HONCHO AOBA-KU,
SENDAI, MIYAGI 980-0014 Japan.
Tel +81-22-723-2150
+1-415-578-3454
Skype callto://jcraft/
Twitter: @ymnk
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