Re: [JSch-users] issues with get of SFTPChannel

[Jarrar J. \(jjaffari\) <jja...@ci...>]

=20
Thanx for the response.=20

Regards,
=20
Jarrar

-----Original Message-----
From: Atsuhiko Yamanaka [mailto:ym...@jc...]=20
Sent: Saturday, October 28, 2006 10:13 AM
To: Jarrar Jaffari (jjaffari)
Cc: jsc...@li...
Subject: Re: [JSch-users] issues with get of SFTPChannel

Hi,

   +-From: "Jarrar Jaffari (jjaffari)" <jja...@ci...> --
   |_Date: Thu, 26 Oct 2006 14:37:54 -0700 ___________________
   |
   |I am very surprised to see the performance of get as compared to
put.
   |What I see is that get() of a 1 G file takes about 3-4 times more
than
   |the put() of the same file.=20

I found that such a problem can be reproduced by enabling the packet
compression.  It seems there must be delay in data inflation.

You know that the packet compression depends on JZlib.  We developed
this lib for X forwarding to our pure Java X server.  From our
requirements, we had not intended to transfer such huge data in batch
style.
Frankly to say, if you are not using really slow network, I don't
recommend to enable the packet compression for your purpose.
For your requirements, the inflater in JZlib should be improved and
optimized and if we have a chance, we will try.


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
Fax +81-22-224-8773
Skype callto://jcraft/