Hi Folks, I know we're all busy, but I'd like to repeat my query regarding GridFTP in striping mode. I understand it may not be clear whats happening in my setup, but I'd like to clarify what the expected behavior is with striping mode.
Is it expected that only one of multiple configured striped servers will ever transfer data for one download request? Put another way, if a GridFTP client attempts to transfer a file X from a GridFTP head server and 3 data transfer servers which all have access to the same file X via a shared filesystem, will the client be pulling parts of X from all 3 servers or only from one of the 3? Thanks. Chris On Fri, Jun 7, 2013 at 11:44 AM, Christopher Wilks <[email protected]>wrote: > Hi Folks, > > I'm attempting to run gridFTP/Globus in a striped configuration. > > While I can get the downloads to work, I notice that for a given transfer > it always gets served from just one of the 3 download (backend) servers I > have allocated and presented via the head node (a separate machine). > > I was under the impression that striped mode allowed for splitting up a > single transfer over multiple download servers, is that correct and I just > have something misconfigured? > > I'm posting the command lines I used to start up the head node, one of the > backend nodes (they're almost all the same except for IPs), and the client > command line. I'm also attaching the gridftp.cfg file from one of the > backend nodes (they're almost all the same except for IPs). > > Thanks very much for the help, and nice work on gridFTP, > Chris Wilks > > Everything is run under sudo, the following has the IPs and ports changed > from the real ones. I have 4 different physical machines (not VMs) with > one running the head node and the other three serving as backend machines. > > head node (19.3.22.26) command line: > /usr/sbin/globus-gridftp-server -p 30893 -r 19.3.22.27:30893, > 19.3.22.28:30893,19.3.22.29:30893 -c /etc/gridftp.conf > > a backend node command line: > /usr/sbin/globus-gridftp-server -p 30893 -dn -c /etc/gridftp.conf > > the client's command line: > globus-url-copy -vb -stripe > gsiftp://[email protected]:30893//file_to_grabfile:///dev/null > > I'm using a mix of versions on the servers, don't know if thats a problem: > the head node and 2 of the 3 backend serves are using this version: > globus_gridftp_server: 6.24 (1366041562-83) > and the other backend server is using this version: > globus_gridftp_server: 6.23 (1363700466-83) > the client is: > globus-url-copy: 8.6 >
