[kerberos-discuss] MIT krb db2 hash test failures on Solaris

Jeffrey Hutzelman jhutz at cmu.edu
Thu Jan 22 22:57:18 EST 2009

--On Thursday, January 22, 2009 09:44:28 PM -0600 Nicolas Williams 
<Nicolas.Williams at sun.com> wrote:

> On Thu, Jan 22, 2009 at 10:06:02PM -0500, Jeffrey Hutzelman wrote:
>> --On Thursday, January 22, 2009 08:42:26 PM -0600 Will Fiveash
>> <William.Fiveash at Sun.COM> wrote:
>> > So either is the above code is making some bad assumptions or stat() is
>> > buggy.  Thoughts?
>> Ugh ugh ugh.
>> If I understand the code you've quoted correctly (without going back to
>> read the rest of it), the bucket size, and therefore the file format,
>> varies depending on the result from st_blksize.  This is hideous; UNIX
>> files are flat byte streams and their format and interpretation should
>> not  be dependent on the properties of the filesystem on which they
>> happen to be  located.
> Actually, sizing database pages so they match the natural block size of
> a filesystem is very important for performance.

Sure, it's one thing to choose parameters based on the filesystem, and 
quite another for them to be defined in terms of the filesystem, such 

> then you cannot safely move
> the database from one filesystem to another!

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