Ok, so it seems a problem with parallel access to this file system. Other network file systems like NFS, for instance, should not be a problem, right? Do you know if there is some method just for checking that this kind of problems will not arise in a particular system (with an 'unknown' file system)? Many thanks, Oriol -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Rob Latham Sent: 20 May 2014 16:01 To: [email protected] Subject: Re: [mpich-discuss] bug in MPI_File_write_all? On 05/20/2014 09:37 AM, CANELA-XANDRI Oriol wrote:
I am writing on a sshfs... Now, I tried on the 'local' disk (I am inside a virtual machine) and there seems that works ok. So, the problem is related with the sshfs?
sshfs and other fuse-based file systems have page-based accesses. If two processes attempt to write different parts of the same page, it might not be clear who should win. I don't know the exact details of the ssshfs/fusefs consistency semantics, but apparently they are not adequate for parallel access. ==rob -- Rob Latham Mathematics and Computer Science Division Argonne National Lab, IL USA _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss