Martin Mares [Sun, 14 Mar 2004 12:58:40 +0000 (12:58 +0000)]
Our regex functions are now able to interface to old-style BSD re_match(),
to POSIX regexec() and to libpcre. Currently it's switched to the BSD mode
as before, I'll look at it more in the evening.
Martin Mares [Tue, 2 Mar 2004 15:38:20 +0000 (15:38 +0000)]
When we try to create a temporary file and it already exists (which can happen
if a program with the same PID has crashed at some time in the past), don't
panic and rewrite the file. Should be safe since we're using our own tmp directory
nobody else can access.
Martin Mares [Sat, 28 Feb 2004 10:49:48 +0000 (10:49 +0000)]
Hopefully finally sorted out the "http://www.xyz.cz?param" mess. The true
semantics turned out to be "http://www.xyz.cz/?param" and most web servers
really require "GET /?param".
I've changed the normalization rules to add the leading slash if needed
which also solves the relative URL problem I mentioned in the comments.
However, this means that the SEMANTICS OF NORMALIZED URL'S HAS CHANGED
and gatherer databases with URL's in the "http://www.xyz.cz?param" form
are now INVALID. I'm going to delete all such URL's from our gatherer now.
Martin Mares [Tue, 24 Feb 2004 18:36:23 +0000 (18:36 +0000)]
Blank lines are considered separators, not terminators of buckets.
Hence extraneous blank lines between buckets and trailing blank lines
after the last buckets are all ignored.
Martin Mares [Thu, 22 Jan 2004 11:21:36 +0000 (11:21 +0000)]
Use int instead of pid_t. At the first glance, this looks like a step backward,
but since we use the variable for printing with a "%d" format-string anyway
and there is no way how to get the right format string for pid_t, it's better
this way.
Martin Mares [Sun, 11 Jan 2004 19:03:21 +0000 (19:03 +0000)]
Rewritten shake down of bucket file.
o Replaced read and write buffers by a single shared buffer.
This should be somewhat faster (with the same size of memory invested
to buffers).
o If ShakeSecurity is set to 2, shaking down should be reliable under
all circumstances, including server reboots and broken bucket files.
Buckettool -F still needs to be run after a failed shakedown and
oid's need to be synchronized with the outside world, but no buckets
will be lost (only some of them may be duplicated).
o The callback function (`the kibitz') is now allowed not only to decide
which buckets will be kept, but also to alter contents of the buckets
provided that it won't enlarge the bucket.
I tried to be very careful and tested the new routine thoroughly, but since
it's a pretty critical place, I would be very happy if somebody checks it
independently.
Martin Mares [Sat, 10 Jan 2004 13:41:09 +0000 (13:41 +0000)]
When pre-sorting a regular file, use lib/arraysort.h on an array of items
instead of the default merge-sort type algorithm working with linked lists.
This is much faster -- e.g., the sorting in shep-export on the current
Sherlock3 database now takes 54 sec instead of 669 :-)
However, to accomplish this I had to change two invariants:
(1) SORT_REGULAR now means not only that the input has regular structure,
but also that each item is reasonably small (i.e., we can use
sorting by exchanging in place).
(2) If SORT_PRESORT is enabled, the comparison function can be called
with both keys equal. This trips ASSERT's on various place which
originally helped a lot during debugging, so I decided to add
a SORT_UNIQUE switch which in DEBUG mode causes the sorter to
ensure that all keys are distinct, so we can remove the ASSERT's.
As both the Shepherd and the Indexer now rely heavily on sorting, it might
be worth a try to optimize the sorter even further, maybe by utilizing
polyphase sorting or something like that, the run sizes really seem to be
distributed unevenly many times.
Martin Mares [Sun, 7 Dec 2003 14:23:58 +0000 (14:23 +0000)]
Improved and cleaned up the bucket library. The original "single operation
pending per process" invariant was no longer feasible (and it caused several
problems in Shepherd).
Reading and writing of buckets now uses dynamically allocated fastbufs and
there can be any number of readers at any time, but only a single writer
(otherwise a deadlock would occur). Read streams are seekable, write streams
at least btell()-able.
Also removed the omnipresent global variables for start of current bucket
etc., each part (Find, Slurp, Create, Shakedown, ...) has its own state
variables.
Martin Mares [Sat, 22 Nov 2003 18:21:22 +0000 (18:21 +0000)]
Added very simple functions for emulating a fastbuf stream over a static
buffer. The struct fastbuf is allocated statically as well to make everything
as simple and as fast as possible.
Robert Spalek [Mon, 17 Nov 2003 13:09:44 +0000 (13:09 +0000)]
1. db/catalog.gz ---> db/catalog
+ it is not sent to oook and feedback-cat via pipes, but it is read by them as a file
+ it is read in 2 passes and the URL's are identified in the 1st phase (catalog.c)
2. URL fingerprinting always uses cf/url-equiv, even in the indexer
Martin Mares [Sat, 15 Nov 2003 10:41:41 +0000 (10:41 +0000)]
A better function for hashing integers (the old multiplier was completely
bogus as it didn't fit in a 32-bit integer) and also a new function
for hashing pointers.
Robert Spalek [Thu, 13 Nov 2003 10:43:07 +0000 (10:43 +0000)]
I decided to turn off cf/url-equiv for indexation. however, after the indexer
is run on regular sherlock5, we cannot manually delete this file for indexer
and restore for gatherd. so I am creating a new parameter that controls
loading this prefix table.
Robert Spalek [Mon, 3 Nov 2003 14:35:50 +0000 (14:35 +0000)]
- giant class flag moved from attributes to card-notes
- merger only marks documents by giant flag and
the penalization is done in chewer
- added new weight attribute to cards: Wp means weight after penalization
added penalization notes in the form .Pg-50 (giant class penalized by -50)
- chewer.c: card_write_start() does NOT write struct card_attr and it needs
to be done manually later
- chewer.c: weight records are sorted chronologically, I like it more :-)
Martin Mares [Sat, 11 Oct 2003 10:19:40 +0000 (10:19 +0000)]
Several improvements to the unicode library:
o All tables are now const.
o Redefined the categories:
- now using _U_* instead of _C_*
- introduced _U_LETTER modified with either _U_UPPER or _U_LOWER
or none (titlecase letters, letter modifiers etc.)
o Added the ligature expansions and _U_LIGATURE.
o Minor cleanups.