#29 Query multiple databases

[Bruno Nyffeler]

It would be extremely useful to be allow to submit a
query like the following:

mpiblast ... -d "db1 db2 db3" -i query.seq ....

Most of our users and scripts make use of this blast
functionality and in order to replace blast by mpiblast
(to make better use of high performance clusters and
have shorter response times) it would be nice to have
this functionality included.

I checked the source code and it seems to be more than
a trivial change. So for our site, I wrote a Python
wrapper script that parses the command line for
multiple database, creates a temporary directory with
links to the fragments needed and starts mpiblast in a
transparent way. If others need this functionality,
I'll upload the script.