Hi Sam,
Just one minor comment on the issue of specifying the trove method in
the config file..
Can't we store the trove method names in the collections.db? We already
store the version string, right?
If we do the above, then we can have mkspace take in a parameter
(command line) the dbpf method name which
we can store it into the db without hardcoding anything..
My 2 cents :)
otherwise looks good!
Thanks,
Murali
I've attached a patch that provides support for different trove
methods (currently we only have dbpf). It also changes Phil's alt-aio
implementation a little to be a separate trove method (using most of
the dbpf code).
The motivation for this is to allow multiple different trove methods
to be supported, and switch easily from one to another. My next step
is to modify Julian's version of dbpf that provides multiple threads
support so that it works as a separate trove method as well.
One issue I'm still not sure about: I allowed the trove method to be
specified as part of the Defaults context in the config file, as well
as in each one of the Filesystem contexts (overrides the default).
The problem with specifying a different method for each filesystem is
that the dbpf implementation stores info about the filesystems in the
collections.db. Does it make sense to only specify a trove method for
the entire storage space?
Also, there are some utilities (mkspace for example) that don't read
in the config files, so they don't know what trove method has been
specified. Right now I'm just hardcoding the dbpf method, but that
means that we can't really use a different trove method to provide a
different storage format. Not that we would ever want to...
I'd like to commit this stuff sometime soon. Please let me know if
there are any objections or comments.
Thanks,
-sam
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