Clusters, grids and Squeak
Michael van der Gulik
squeakml at gulik.co.nz
Thu Apr 21 01:21:00 UTC 2005
Bruce O'Neel wrote:
> On Wed, Apr 20, 2005 at 09:04:45PM +1200, Michael van der Gulik wrote:
>
>
>>Be carefull not to modify any code from any of those headless instances
>>- the squeak.sources file will end up corrupted. There is no
>>multi-threaded protection on it. (I learned this the hard way.)
>>
>
>
> I would expect the .sources file to be read/only. The .changes file
> on the other hand gets quite messed up when you have multiple
> instances pounding on the same .changes file. For my use I don't
> care but others might. Once I put a squeak image/changes into
> production and it starts running across my "cluster" of machines
> the .changes file is basically just hash.
umm... oops... I meant the squeak.changes file.
In a way, I consider the lack of file locking a bug. But then I consider
file systems to be one enourmous bug too; everybody should be using
object-oriented databases to store code in.
Mikevdg.
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