Rather, you will simply be issued a credential with the default lifetime that the identity provider is configured to issue - typically 10 days. When activating on GCSv4 endpoints that use a CILogon identity provider there is no way to request a specific credential lifetime. However, no matter what credential lifetime you request, you will never be issued a credential that is longer than the maximum credential lifetime than the MyProxy server is configured to issue. Globus endpoint activate command with the -proxy-lifetime option, or in the web interface by clicking on the "advanced" link on the web page when prompted to authenticate to the GCSv4 endpoint. You can do this on the Globus command line interface by using the Provider, you can specify the lifetime of the credential you are requesting. When authenticating on a GCSv4 endpoint that uses a MyProxy identity Longer than the maximum credential lifetime for which an identity provider isĬonfigured. It is not possible for an end user to be issued credentials that will last Large files over high latency links can benefit from higher parallelism. It does not matter whether you are attempting to do it manually through a FTP client or through some script, that speaks the FTP protocol. Parallelism can divide and send a file’s data blocks over multiple TCP streams, however, all the TCP streams have the same source and destination GridFTP server process. Regular FTP sends a file over one TCP stream, which isn’t ideal for high latency, high throughput links. So concurrency is great for driving more filesystem processes, CPU cores, and even machine nodes, in addition to opening more network data streams. Also note that each session may be to a different server if you had DNS round robining, a load balancer, or multiple physical DTNs defined in Globus. Files are divided among the sessions, so this only works if you have multiple files in a job (most users do). I'm afraid that majority of FTP servers do not provide this information at all. Thus, a concurrency (cc) of 4 would drive 4 GridFTP processes, so you have 4 processes driving IO (each one working on a different file). There's no generic way to check a disk space on FTP server. Each login session starts a GridFTP process on the server, usually via xinetd. Opens multiple login sessions (also known as control channel sessions).
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