Hi Jan,

Ok I understand,thank you very much..


Jan Harkes wrote:

>On Mon, Sep 26, 2005 at 01:16:14PM +0300, Hakan Avci wrote:
>  
>
>>Hi Jan,
>>
>>OK.I did as what you say.First open file "hakan" ,than open same file on 
>>second client.But there is no kernel error or in-use error??is this a 
>>bug?or Am I do something wrong??
>>    
>>
>
>I guess I didn't understand your question.
>
>Coda has no file locking, we're optimistically assuming that write
>sharing is not very common.
>
>An evaluation of this statement can be found in J.J. Kistlers thesis [1]
>at page 221. Here he examines the write-sharing patterns over a 12 month
>period on an AFS server cluster at CMU with about 300 users.
>
>[1] Disconnected Operation in a Distributed File System
>    Kistler, J.J.
>    School of Computer Science, Carnegie Mellon University
>    May 1993, CMU-CS-93-156 
>
>You can find links to a postscript and an acrobat copy of his thesis
>around the bottom of this page,
>http://www.cs.cmu.edu/afs/cs/project/coda-www/ResearchWebPages/docs-coda.html
>
>His thesis also has references to several other file access studies.
>
>    Short-Term File Reference Patterns in a UNIX Environment
>    Floyd, R
>    Tech. Rep. 177 University of Rochester Computer Science Department, 1986
>
>    Directory Reference Patterns in a UNIX Environment
>    Floyd, R.
>    Tech. Rep. 179 University of Rochester Computer Science Department, 1986
>
>    A Trace-Driven Analysis of the Unix 4.2 BSD File System
>    Ousterhout, J., Da Costa, H., Harrison, D., Kunze, J., Kupfer, M.,
>    and Thompson, J.
>    Proceedings of the Tenth ACM Symposium on Operating System
>    Principles (December 1985)
>
>    A Study of File Sizes and Functional Lifetimes
>    Satyanarayanan, M.
>    Proceedings of the Eighth ACM Symposium on Operating System
>    Principles (December 1981)
>
>    Long Term File Reference Patterns and their Applications to File
>    Migration Algorithms
>    Smith, A.
>    IEEE Transactions on Software Engineering 4, 7 (July 1981)
>
>Jan
>
>
>  
>


-- 

Hakan Avcı

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