Difference between revisions of "CineGrid"
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(→Copying large files over multi-gigabit networks) |
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** Change maximum UDP buffer size (read and write) on sender and receiver: edit /proc/sys/net/core/rmem_max and /proc/sys/net/core/wmem_max. The number in the files determines the buffer size in bytes. We suggest the size to be 16MB (=16777216 bytes) for each of the buffers, which is the maximum allowed size. | ** Change maximum UDP buffer size (read and write) on sender and receiver: edit /proc/sys/net/core/rmem_max and /proc/sys/net/core/wmem_max. The number in the files determines the buffer size in bytes. We suggest the size to be 16MB (=16777216 bytes) for each of the buffers, which is the maximum allowed size. | ||
** Set buffer sizes in application, before the sockets connect: | ** Set buffer sizes in application, before the sockets connect: | ||
| − | + | <pre> | |
int feng_temp=256000; | int feng_temp=256000; | ||
UDT::setsockopt(serv,0,UDP_SNDBUF,&feng_temp, sizeof(int)); | UDT::setsockopt(serv,0,UDP_SNDBUF,&feng_temp, sizeof(int)); | ||
| Line 17: | Line 17: | ||
int feng_recvbuf=40960000; | int feng_recvbuf=40960000; | ||
UDT::setsockopt(serv,0,UDP_RCVBUF,&feng_recvbuf,sizeof(int)); | UDT::setsockopt(serv,0,UDP_RCVBUF,&feng_recvbuf,sizeof(int)); | ||
| − | + | </pre> | |
Revision as of 10:18, 14 June 2007
Team members: Jurgen Schulze, Shaofeng (Leo) Liu
Copying large files over multi-gigabit networks
- Download latest version of UDT file transfer tool. The version we have been using is http://ivl.calit2.net/wiki/files/revisedudt3.3.tar.gz. Untar and unzip the file to a directory of your choice.
- Optimize network settings:
- Change maximum UDP buffer size (read and write) on sender and receiver: edit /proc/sys/net/core/rmem_max and /proc/sys/net/core/wmem_max. The number in the files determines the buffer size in bytes. We suggest the size to be 16MB (=16777216 bytes) for each of the buffers, which is the maximum allowed size.
- Set buffer sizes in application, before the sockets connect:
int feng_temp=256000;
UDT::setsockopt(serv,0,UDP_SNDBUF,&feng_temp, sizeof(int));
int feng_mss=8800;
UDT::setsockopt(serv,0,UDT_MSS ,&feng_mss, sizeof(int));
int feng_recvbuf=40960000;
UDT::setsockopt(serv,0,UDP_RCVBUF,&feng_recvbuf,sizeof(int));
- The following commands are called from the directory udt3.3/app/
- Run the sender:
./sendfile
- Run the receiver:
Syntax: ./recvfile <IP address/hostname of sender> <port number> <remote source file name> <local destination file name> Example: ./recvfile 127.0.0.1 9000 /home/jschulze/data/largefile.tif ./temp.tif
