******************* This email originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list https://spam.ic.ac.uk/SpamConsole/Senders.aspx to disable email stamping for this address. ******************* Hi grid users, I am Yongheng Xu from Lancaster and I am having trouble uploading a single large root file (114GB) to CA-SFU-T21-disk using dirac. What I did was dirac-dms-add-file /t2k.org/users/yoneheng.xu/run4a_FHC_combined.root ~/p6t_validation_samples/r4a.root CA-SFU-T21-disk -ddd However, it runs for a while (~1 hour) then fails and gives the following error message: 2020-03-12 16:26:20 UTC dirac-dms-add-file [140363232319296] DEBUG: New session connecting to server at ('dirac01.grid.hep.ph.ic.ac.uk', 9133) 2020-03-12 16:26:20 UTC dirac-dms-add-file [140363232319296] DEBUG: Connected to: dips://dirac01.grid.hep.ph.ic.ac.uk:9133/Accounting/DataStore 2020-03-12 16:26:20 UTC dirac-dms-add-file [140363232319296] DEBUG: New connection -> 146.179.232.10:9133 2020-03-12 16:26:20 UTC dirac-dms-add-file [140363232319296] DEBUG: Closing socket 2020-03-12 16:26:20 UTC dirac-dms-add-file/DataManager/putAndRegister [140363232319296] DEBUG: putAndRegister: Sending accounting took 0.0 seconds 2020-03-12 16:26:20 UTC dirac-dms-add-file/DataManager/putAndRegister [140363232319296] DEBUG: Failed to put file to Storage Element. /home/t2k/yxu/p6t_validation_samples/r4a.root: Connection timed out ( 110 : Failed to copy file /home/t2k/yxu/p6t_validation_samples/r4a.root to destination url srm://lcg-t2kse1.sfu.computecanada.ca:8443/srm/managerv2?SFN=/nd280data/t2k.org/users/yoneheng.xu/run4a_FHC_combined.root: [110] [gfalt_copy_file][perform_copy][srm_plugin_filecopy][srm_do_transfer][gfalt_copy_file][perform_copy][perform_local_copy][streamed_copy][gfal_plugin_closeG][gfal_gridftp_closeG][gfal_gridftp_closeG] Operation timed out) 2020-03-12 16:26:20 UTC dirac-dms-add-file [140363232319296] ERROR: Error: failed to upload /t2k.org/users/yoneheng.xu/run4a_FHC_combined.root to CA-SFU-T21-disk I have tested with smaller files and they can be uploaded without any problem. Does anyone know what might be the cause of this issue? The full log is attached to this email. Many thanks, Yongheng Xu