On Mon, 21 Jul 2008, Padraig O'Sullivan wrote: > Everything goes fine until I attempt to create a few files and > directories using csyn as suggested at the end of the document on > creating a small test cluster. The csyn command just hangs and never > returns. The output I get is: > > # ./csyn --syn makedirs 1 1 1 --syn walk > starting csyn at 0.0.0.0:36175/7874/0 > mounting and starting 1 syn client(s) > waiting for client(s) to finish > > When I do an strace of the csyn process, I can see that it is waiting > on the futex system call. Does anyone have ideas as to why this is > happening? I'd like to be able to debug this further and understand > exactly what's happening. Any suggestions on how to debug this or what > log files (I have debugging enabled for all of the Ceph daemons) etc. > to look at would be great.
All of csyn's interactions with the system are over the network, so stracing it won't tell you too much. Try passing --debug_client 10 and --debug_ms 1 to see what messages it is passing and whether it successfully "mounts" the fs. My guess is the osds are having trouble getting initialized. You can do ./cmonctl mds stat ./cmonctl pg stat to tell you whether the MDS successfully started, and whether the placements groups came online (they should all be 'active+clean', but if the osds are having trouble initializing they'll be stuck at 'creating'). Let me know how it goes, and feel free to ping me in #ceph on oftc.net. sage ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Ceph-devel mailing list Ceph-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ceph-devel
