Not with dd or IOR, but one of the worst I've seen has been using named pipes for inter-process communication. That and doing 4 and 8 byte I/O's using O_DIRECT.
-Ben On 6/12/17, 5:50 PM, "lustre-discuss on behalf of Cory Spitz" <[email protected] on behalf of [email protected]> wrote: >Michael, > >The worst case would probably involve reading/writing the same file >extents across multiple nodes. You could probably whip up a script using >/bin/dd for such a thing. Or is that too evil for you? > >-Cory > >-- > > >On 6/2/17, 2:32 AM, "lustre-discuss on behalf of Michael Kluge" ><[email protected] on behalf of >[email protected]> wrote: > > Hi all, > > I am looking for IOR scripts that represent pathological use cases >for file systems. Something like shared file access with a small, >unaligned block size or random I/O to a shared file. Does anyone has some >input for me there that he/she is willing to share? > > > Regards, Michael > > -- > Dr.-Ing. Michael Kluge > > Technische Universität Dresden > Center for Information Services and > High Performance Computing (ZIH) > D-01062 Dresden > Germany > > Contact: > Falkenbrunnen, Room 240 > Phone: (+49) 351 463-34217 > Fax: (+49) 351 463-37773 > e-mail: [email protected] > WWW: http://www.tu-dresden.de/zih > > > > >_______________________________________________ >lustre-discuss mailing list >[email protected] >http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org _______________________________________________ lustre-discuss mailing list [email protected] http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
