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The current value of NUSERS (16) is very small when the client has a large number of PAGs. When we have a few thousand (or even just a few hundred), the length of the unixuser hash chains can be come long enough to cause noticeable differences in performance. Looking up unixuser structs is a very common code path, since we need to do this for pretty much any file access that's not already cached at the VFS layer. To alleviate this, increase NUSERS to 2k. This is certainly not necessary on all systems (such as those that never use authentication, or only have a few PAGs), but the overhead is a very small constant amount of memory. Change-Id: I17b32f192656db9ffc97ac47b0923a02803977a3 Reviewed-on: https://gerrit.openafs.org/14959 Reviewed-by: Cheyenne Wills <cwills@sinenomine.net> Reviewed-by: Benjamin Kaduk <kaduk@mit.edu> Tested-by: BuildBot <buildbot@rampaginggeek.com>
AFS is a distributed file system that enables users to share and access all of the files stored in a network of computers as easily as they access the files stored on their local machines. The file system is called distributed for this exact reason: files can reside on many different machines, but are available to users on every machine. OpenAFS 1.0 was originally released by IBM under the terms of the IBM Public License 1.0 (IPL10). For details on IPL10 see the LICENSE file in this directory. The current OpenAFS distribution is licensed under a combination of the IPL10 and many other licenses as granted by the relevant copyright holders. The LICENSE file in this directory contains more details, thought it is not a comprehensive statement. See INSTALL for information about building and installing OpenAFS on various platforms. See CODING for developer information and guidelines. See NEWS for recent changes to OpenAFS.