list_keys listing all keys
brad at danga.com
Mon Nov 20 02:43:45 UTC 2006
The whole server method is flawed because there's no way to iteratively
return stuff via the protocol. It's single-line one-response one-answer,
so if your request is "All keys please!" the answer might be a 2GB single
line, which would probably break dozens of layers as it traverses stuff.
So the list_keys limitation in the server is really a "I bet this isn't
what you want." type of thing.
On Mon, 20 Nov 2006, Daniel Burke wrote:
> Hi MogileFSers,
> If list_keys is passed an empty prefix, it will return an error:
> $mogc->list_keys("", undef);
> I had expected all keys to be returned but is this an intentional
> design decision?
> If I apply the attached patch to Worker/Query.pm::cmd_list_keys:476
> return $self->err_line("no_key") unless $prefix;
> To become:
> return $self->err_line("no_key") unless defined $prefix;
> list_keys in the Client API will now list all keys if given an empty
> Will anything bad happen? I ask because I think there must be a good
> reason for this design decision and I want to be careful.
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