Re[jcifs] ading files using SmbFileInputStream

Michael B Allen ioplex at
Tue Jun 16 15:33:10 GMT 2009

On Tue, Jun 16, 2009 at 7:18 AM, aviv<avivf at> wrote:
> Michael B Allen wrote:
>> On Mon, Jun 15, 2009 at 11:45 AM, aviv<avivf at> wrote:
>>> The latency is pretty high, which is exactly why I want to minimize the
>>> number of requests made (and just make each request larger). I did play
>>> with
>>> snd_buf_size and rcv_buf_size but it did not work since the length in the
>>> request sent in capped to the value of transport.server.maxBufferSize
>>> which
>>> I cannot change, or am I missing something?
>> The maxBufferSize value is the minimum of snd_buf_size / rcv_buf_size
>> and the MaxBufferSize field returned by the server in the
>> SMB_COM_NEGOTIATE response. So if you cannot get it to go higher, it's
>> because the server has set the limit.
>> Note that there's a "large read / write" mode and a patch in the
>> patches directory for enabling it. It's very old so don't bother
>> trying to apply it with the 'patch' command. You'll have to manually
>> modify the JCIFS source yourself to get it to work. Also I'm not
>> convinced it will actually improve performance for most people. But
>> depending on how important throughput is to you you might check it
>> out.
> Thanks for you help. I ended up changing SmbFileInputStream slightly so that
> I can explicitly specify the request size (thus ignoring the MaxBufferSize
> negotiated with the server).

And that actually worked?

Michael B Allen
Java Active Directory Integration

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