Xapian devel - Mar 2013 - Need help as Pl2 tests not performing as expected

Hello guys. I just ran the updated tests for PL2 and they are not giving
the mset order I expect.Now,the thing is, dfr's behavior is a bit hard to
predict and so even if I expect a particular order ,it may give another
order and still be correct.So,the only way to write correct tests for PL2
is to manually calculate the weight of the documents to decide the expected
order.For that,I need to have a look at the statistics  stored in the
database for my tests.I ran the tests and after it failed ,I tried "delve
db" at the terminal,but it says that it can't open the database.Please
can
someone help me this.

Also,the *max possible  *statistic of the Mset *is less than max
attained*and so ,Ill have to have a look at the code again.This may
take some
time,as PL2 has a very complex formula and it's a bit hard to understand
what's happening where.

-Regards
-Aarsh

On Wed, Mar 27, 2013 at 6:23 PM, aarsh shah <aarshkshah1992 at
gmail.com>wrote:
> Hello guys.I just  realized that Ive not set the weighting scheme to PL2
> in the tests for PL2 and so a default weighting scheme of BM25 is used. I
> am extremely sorry for this and am updating the tests by setting the
> weighting scheme to PL2.
>
> -Regards
> -Aarsh
>
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On Wed, Mar 27, 2013 at 07:44:49PM +0530, aarsh shah
wrote:
> Hello guys. I just ran the updated tests for PL2 and they are not giving
> the mset order I expect.Now,the thing is, dfr's behavior is a bit hard
to
> predict and so even if I expect a particular order ,it may give another
> order and still be correct.So,the only way to write correct tests for PL2
> is to manually calculate the weight of the documents to decide the expected
> order.
That makes sense.
> For that,I need to have a look at the statistics  stored in the
> database for my tests.I ran the tests and after it failed ,I tried
"delve
> db" at the terminal,but it says that it can't open the
database.Please can
> someone help me this.
"db" is just the variable name, not the path on disk.

The databases used for the tests are stored in subdirectories of the
tests/ directory.  The names start with a dot, so are hidden by
default in "ls", but "ls -a" will show them.

So look in .brass and you'll see all the cached databases in brass
format.

I'd guess you want something like .brass/db=apitest_dfr - one easy way
to be sure which you want is to wipe them all and then run just the
testcase you want the database for - then there should only be one
database there - for example:

rm -rf .brass
./apitest -b brass dfr_pl2weight4
ls -l .brass
> Also,the *max possible  *statistic of the Mset *is less than max
> attained*and so ,Ill have to have a look at the code again.
I think that would probably happen if you're returning a value above the
upper bound you gave.

Cheers,
    Olly