Hi, On Wed, 16 Sep 2020 at 20:03, Frank Ritchie <frankaritchie@xxxxxxxxx> wrote: > > Hi all, > > I am looking for documentation on how fio handles unavailable servers > in client/server mode. For instance, if I start a client specifying 10 > servers to run tests on and only 5 are immediately available will fio > retry, block, fail, etc? Is the behavior configurable? Client connection is done in https://github.com/axboe/fio/blob/14060ebb90ce5a0a164d0e5e52c13e31b53b282d/client.c#L601 . Reading through the functions it calls (such as fio_client_connect_ip() see https://github.com/axboe/fio/blob/14060ebb90ce5a0a164d0e5e52c13e31b53b282d/client.c#L529) they call ultimately connect() and if that fails for any reason (see https://man7.org/linux/man-pages/man2/connect.2.html ) an error is returned and the client exits. In the above scenario, if the fio client tries to connect to a server that is not running but the port is not being firewalled that client will exit with an error message (and if firewalled it will eventually timeout). There is nothing that I see in the current code that would allow retrying/blocking but you could modify the code to do the connect in a loop until some number of retries had been done / some timeout reached. After you had succeeded with the initial change, you could make it an option that attached to the client struct and then it would be configurable... -- Sitsofe | http://sucs.org/~sits/
