In this example, data is transferred from the remote host .uk to .uk. Alternatively you can specify that the transfer should continue for a fixed duration in seconds using the -t option. Note that the performance takes a while to "ramp up", so you will not see the best rates if transferring small files individually as the process never gets up to full speed: $ globus-url-copy -vb -p 16 -fast /dev/null Repeat with values of N in the range 4 to 32 to compare rates. This excludes any interaction with either filesystem and gives an upper limit to the performance that can be achieved at the time. Test performance with large files by downloading from /dev/zero on the remote server to /dev/null locally. You can experiment with N in the range 4 to 32 to obtain the best performance, but please be aware that many parallel transfers can draw heavily on shared resources and degrade performance for other users: $ globus-url-copy -vb -p 16 -fast /group_workspaces/jasmin/myworkspace/myfileģ. The -p N and -fast options can additionally be used in combination to enable N parallel streams at once, as shown below. Download a file from remote directory /home/users/USERNAME to destination on the local (client) machine, for example a group workspace on JASMIN: $ globus-url-copy -vb /group_workspaces/jasmin/myworkspace/myfile Please consult the documentation for the globus-url-copy command for the full range of options and arguments. Once you have successfully established that you can connect to the server (as above), then you should be able to transfer data between the remote end (server) and local end (client) with commands such as shown below:Īs above, if you have the same username on both local and remote systems, then the of the sshftp URI can be omitted. This is particularly important if you are combining this command with other options. Note that the URI of the server, in this case must come immediately after (as it is an argument to) the -list option. In this case, we are making the connection to a fictitious server .uk: $ globus-url-copy -vb -list username and username2 are the same (on the different systems, the part of the sshftp URI can be omitted. Use the globus-url-copy command to list the contents of your home directory on the remote server (This will only work if you already know that that server supports GridFTP over SSH). An alternative to try out beforehand, is to use .uk. Since you will be using SSH as the authentication mechanism, you should ensure that your initial connection to the JASIMN transfer server is made with the -A option enabled, to enable agent forwarding: $ ssh -A that in order to use .uk you will need to have high-performance data transfer access on your JASMIN account. Transfers from ARCHER2 for details of different routes affecting your choice of server (since this is the one of the most likely places to which JASMIN users will want to transfer data to/from).Transfer Servers for details on which servers within JASMIN have GridFTP available.SSH-based GridFTP does not enable the full feature set provided by certificate-based GridFTP and in particular does not work with Globus Online, which provides useful interfaces and APIs for managing large-scale data transfers, but still provides a major step up in performance by "filling the pipe" more efficiently than scp/rsync/sftp, particularly over longer distances and can do verification and sync operations as part of the transfer. Firewall requirements" in the GridFTP System Administrators Guide. Consult your local IT support desk for details and direct them to the client section of "3. *The client may need to have certain ports enabled on the host or institutional firewall if present. It is commonly used with certificate-based authentication, but can also take place between suitably configured* server and client using SSH as the authentication mechanism. GridFTP is the recommended tool for transferring large files or groups of files across high-speed Wide-Area Networks (WANs). Upload data (push data from JASMIN to remote server).This article describes how to transfer data using GridFTP with SSH authentication. Data Transfer Tools: GridFTP (SSH authentication)
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |