The server needs to be run threaded in order to support the udt_ref driver. If you have a globus-gridftp-server in $GLOBUS_LOCATION/sbin/gcc32dbgpthr/shared, you can copy it to sbin, otherwise, 'make globus_gridftp_server-thr' in the installer.

The -protocol_stack option on the server currently doesn't do anything.

Also note that if you want to use udt in a 2-party transfer, you need to use a threaded globus-url-copy (make globus_gass_copy-thr if you don't have it) and have the udt_ref driver built locally as well.

Mike

Zulfi Imani wrote:
Hi,

I am having a problem with running the globus-url-copy with the -udt option.

I installed the threaded version of the gridftp server using the nightly build of last week (make gridftp globus_gridftp_server-thr). I used gcc32 as the flavor. I then compiled gridftp with UDT with-flavor=gcc32dbgpthr. I ran the gridftp server without the "--protocol_stack udt_ref " option. Next I ran globus-url-copy as:

globus-url-copy -vb -udt ftp://localhost:40300/dev/zero ftp://localhost:40300/dev/null

and it gave me the following error:

error: globus_ftp_client: the server responded with an error
500 500-Command failed : Setting data channel driver stack failed.
500-globus_xio: driver activation failed.
500-globus_extension_module: Couldn't dlopen libglobus_xio_udt_ref_driver_gcc32dbg.so in /home/zulfiimani/gridftp/INSTALL/lib (or LD_LIBRARY_PATH): libglobus_xio_udt_ref_driver_gcc32dbg.so: cannot open shared object file: No such file or directory
500-
500 End

I have the libglobus_xio_udt_ref_driver_gcc32dbgpthr.so.* files in the GLOBUS_LOCATION/lib dir but not 'libglobus_xio_udt_ref_driver_gcc32dbg.so' because I have a threaded build. I even tried

globus-url-copy -vb -dcstack udt_ref ftp://localhost:40300/dev/zero ftp://localhost:40300/dev/null <ftp://localhost:40300/dev/null>

but got the same error.

Then I ran the gridftp server with the '--protocol_stack udt_ref' option and then executed the globus-url-copy without '-udt' option and it worked fine.

Any inputs on this will be great.

Thanks
Zulfi

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