> I am building a custom logging solution for our AFS cell. In > essence, I'm just logging all SRXAFS_FetchData() calls in fileserver, so > when a specific FID is read by a client, a log entry is written > somewhere. > > This works as long as the file is not in the client cache.
What do you mean by read? Even if you avoid caching on the client side, consider the case of a program mmap()'ing a file and then repeatedly reading the mapped memory. I suspect you won't get repeated fetches in this case. (Even if you could do it, though, your performance would be horrid, doing a network fetch for each reference to the mapped file.) > Is there a way to tell an AFS client NOT to cache a specific file, or > to force a callback on that file so next time the client tries to read > the file, the server is notified? You could alter the callback times on the fileserver. With each fetch request, the fileserver returns a callback time; it's controlled by TimeOuts and MinTimeOut in src/viced/callback.c. Just reducing those times should result in something closer to the behavior you think you want. As others have pointed out already, this will of course make your performance considerably worse, for the majority of workloads. -- kolya _______________________________________________ OpenAFS-devel mailing list [EMAIL PROTECTED] https://lists.openafs.org/mailman/listinfo/openafs-devel
