Hello everybody, I have a question regarding bandwidth (or more general: ressource) allocation in an OpenAFS setup. I'm maintaining a small installation with one server and a dozen of clients. Server and most clients run on Linux. Some clients also on MS Windows 7. Authentication is done by way of MS Server 2008 AD.
The problem I have is that time and again a user needs to perform rather performace killing operations on AFS. That is compiling a large software project with accessing a large number of small files and also producing a large number of files. In this situation other users with moderate load on AFS suffer a bad user experience. That is not necessarily that absolute bandwidth is too low. It is rather that interactive work becomes annoying as operations on AFS tend to block repeatedly. For example writing a small text file can takes up to five seconds until suddenly everything goes back to normal. I wonder what would be the best approach to improve the user experience for such cases. A low-level approach like extensions to the TCP/IP stack on the Linux server machine might be one example. But I feel that given the complexity of OpenAFS this is probably not the route to take. So I thought maybe using the distribution properties of OpenAFS might be a better way. Are there any best practices for such a scenario? On a different matter I experience that running the OpenAFS client on MS Windows turns out generally really, *really* slow. From my knowledge MS Windows simply isn't very good regarding file operations even on local disks in comparison to UNIX systems. But working with OpenAFS on MS Windows is even worse than the usual. When comparing the performance between the Windows and the Linux OpenAFS clients I'm at least four times slower on Windows than on Linux. This can also be experienced during interactive work with the Windows client when operating on AFS. Question is if this is a known fact. Or if not so what I could do to relieve the problem. Any help is appreciated, Matthias -- Matthias Gerstner, Dipl.-Wirtsch.-Inf. (FH), Senior Software Engineer e.solutions GmbH Am Wolfsmantel 46, 91058 Erlangen, Germany Registered Office: Pascalstr. 5, 85057 Ingolstadt, Germany Phone +49-8458-3332-672, mailto:[email protected] Fax +49-8458-3332-20672 e.solutions GmbH Managing Directors Uwe Reder, Dr. Riclef Schmidt-Clausen Register Court Ingolstadt HRB 5221 _______________________________________________ OpenAFS-info mailing list [email protected] https://lists.openafs.org/mailman/listinfo/openafs-info
