--On December 8, 2011 2:42:38 PM -0800 Russ Allbery <r...@stanford.edu> wrote:
> Simon Wilkinson <s...@inf.ed.ac.uk> writes: > >> The first possible cause is journalling filesystems. Many of these flush >> their journals to disk at regular intervals, blocking or reducing access >> to the filesystem during the journal flush. This block can be enough to >> cause the fileserver to start queuing incoming connections, and in a >> site that is finely balanced, may be enough to cause performance to >> stall. This was made considerably worse by the fileserver performing a >> sync() operation every 10 seconds. This is fixed in 1.6.0 - a 1.4.x >> release containing the fix has yet to appear. > > I *think* we're currently running a file server with patches applied to > disable some of the sync() calls, but I may be misremembering. I know > we've had this discussion before. The build that we are using includes Simon's sync patch, i.e. Change-Id: Id06cb99ae83af2e4a82e7b20fb14b8457dc16883. Bill -- Bill MacAllister Infrastructure Delivery Group, Stanford University _______________________________________________ OpenAFS-devel mailing list OpenAFS-devel@openafs.org https://lists.openafs.org/mailman/listinfo/openafs-devel
