) and
the other at parse level (ParseData.metadata).
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Andrzej Bialecki (JIRA) wrote:
[ http://issues.apache.org/jira/browse/NUTCH-66?page=all ]
Andrzej Bialecki closed NUTCH-66:
--
Resolution: Fixed
Just tried to commit the fixes, and svn said it could not find the
repository. I went
Hi folks,
I'm away on a 2 weeks vacation, so I won't be able to follow the
discussions. If you think I should be involved in something, please mail
me directly, so I can pick it up more easily when I'm back. Thanks!
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Doug Cutting wrote:
Andrzej Bialecki wrote:
So, I would propose a deadline of Aug 8 for the last commits, and then
perhaps Aug 15 for the release?
Sounds good to me. Thanks for helping with this!
Unfortunately, the patches related to detecting the unmodified content
will have to wait
Piotr Kosiorowski wrote:
I can commit such changes for 0.7 release (it means today) if I got
positive feedback from other committers.
+1
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set them to 0.07 now, so that we have the right
values in the release ...
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http
. Considering that this is the last
release before merging the map-reduce, doing a branch seems very
appropriate.
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is NOT stored in Lucene index, it's
just indexed there - the text itself is stored in the segment parse_text.
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, which
works with recent code, your help in testing would be appreciated.
Please vote +1 for and -1 against.
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regards,
Andrzej Bialecki
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such sites, a
depth-first crawler would be better.
It's not too difficult to build one, using the tools already present in
Nutch. Contributions are welcome... ;-)
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a general tutorial would be
difficult... unless it would be simply you need to run ./nutch crawl ...
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% of your CPU. :-)
Solution: upgrade PDFBox to the yet unreleased 0.7.2 .
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http
to just replace the old JAR with the new one, but
keeping the same name as the old JAR.
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, through
the protocol-httpclient plugin.
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, where Nutch cannot be forced to re-fetch the
page because every time you try it remains unmodified - but you need
refetching the actual data because e.g. you lost that segment data...
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...
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to something like NDFSShell or something like this? Tests are placed
somewhere else, so the name of this class doesn't fit here (and IMHO it
should stay here, or perhaps in tools/).
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to wait for these changes
as it was the main reason to prepare 0.7.1 release).
I have some time tomorrow or the day after, I'll do it then.
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that. no?
Yes, it comes from another package so I need to wrap it around in the
plugin interfaces, give me a day or two...
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Piotr Kosiorowski wrote:
Hi Andrzej,
Is anything related to clustering commits left? Or should we proceed
with 0.7.1 release?
I will commit the PDFBox update today, and then I don't have anything
more...
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.
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This is interesting. Could you please check what is the difference in
this benchmark, if you set HttpVersion.HTTP_1_1 in
protocol-httpclient/HttpResponse.java:92 ?
Unfortunately, Nutch cannot use that library because it's LGPL.
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httpclient is L-GPL,
and hence not acceptable for apache.org.
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Doug Cutting wrote:
Andrzej Bialecki wrote:
100k regexps is still alot, so I'm not totally sure it would be much
faster, but perhaps worth checking.
I have worked with this type of technology before (minimized,
determinized FSAs, constructed from large sets of strings expressions
, and there's no other way to solve the
problem without losing text, then your patch has my +1.
We should not drop the offending characters, but escape them. Either the
Unicode entity (#nn;) or CDATA way is ok (and CDATA way is simpler).
So, this is -1 for the patch.
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characters like ' .
Then we should take the best of both worlds - escape valid characters,
and replace invalid ones with '?' or space, or nothing. I know a place
where we could find some inspiration (Carrot2 XMLSerializerHelper.java
... ;-) )
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Connector (server.xml). This could
result in such output...
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could also use an n-gram profile (either word-level
or character level) with coarse quantization.
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numerous problems with quantization noise).
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in the
config file). I found that in many cases TagSoup gives much better
results, especially for pages with multiple html or body elements,
where neko would give up...
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true
subject ... ;-)
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it would be
possible to deploy replicas of segments across the set of DS$Server-s
without getting duplicate results.
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segments to
update their internal lists.
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make sense to
move it to a separate project on its own (or maybe as a part of Jakarta
Commons), but moving it into a catch-all purely optional category like
Lucene contrib would increase risks that it slides into oblivion...
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in design, and also prepare these parts to be separated into
their own projects.
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http
- please see Lucene
docs for details how to do this.
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it sound suitable
for the new web database (I'm not familliar with the mapred branch of
nutch)?
You will find the mapred version much much more responsive.
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in -put operation only if I first deleted all .*.crc files.
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is to index it and then build the summaries.
Please see the profiles here:
http://www.getopt.org/nutch/profile/index.html
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Piotr Kosiorowski wrote:
On 11/22/05, Andrzej Bialecki [EMAIL PROTECTED] wrote:
Hi,
I've been profiling a Nutch installation, and to my surprise the largest
amount of throwaway allocations and the most time spent was not in Nutch
specific code, or IPC, but in Lucene
Sami Siren wrote:
+ if (k.contains(score)) {
Since:
1.5
Ah, indeed. Fixed - thanks!
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this on
purpose, so if it's not too complicated we should warn the user.
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for or
against... Please use standard quoting rules... please.
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(Moving the discussion to nutch-dev, please drop the cc: when responding)
Doug Cutting wrote:
Andrzej Bialecki wrote:
It's nice to have these couple percent... however, it doesn't solve
the main problem; I need 50 or more percent increase... :-) and I
suspect this can be achieved only
need to evaluate this and
determine, for query log, how different the results are.
Then a HitCollector can simply stop searching once a given number of
hits are found.
Doug
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even with the group of servers that answered
this particular query... My guess is that there could be different
estimated indexes prepared for different values of the main boolean
parameters, like filter=0...
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results, and their order was completely at odds with the original
hit list. This is probably due to the scoring of sloppy phrases - I need
to modify the test scripts to compare the explanations from matching
results...
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Doug Cutting wrote:
Andrzej Bialecki wrote:
By all means please start, this is still near the limits of my
knowledge of Lucene... ;-)
Attached is a class which sorts a Nutch index by boost. I have only
tested it on a ~100 page index, where it appears to work correctly.
Please tell me
Doug Cutting wrote:
Andrzej Bialecki wrote:
Shouldn't this be combined with a HitCollector that collects only the
first-n matches? Otherwise we still need to scan the whole posting
list...
Yes. I was just posting the work-in-progress.
Ok, I just tested IndexSorter for now. It appears
Jérôme Charron wrote:
If there is no objection, I will commit these changes in the next hours.
+1. Great stuff! Finally we will be able to predict which parser works
on which content...
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- in order to avoid name-clashes with other
properties (e.g. blindly copied from the protocol headers).
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think these requirements point
rather to a fairly primitive FS (not FAT - a real FS ;-) ), perhaps
reiserfs is too complex.
When in doubt, test.
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/ will soon be invaded by the
code from mapred, I guess some time around the middle of January (Doug?) ...
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Zaheed Haque wrote:
what about the following:
http://issues.apache.org/jira/browse/NUTCH-125
On its way ... ;-) I'll add it during this week.
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Doug Cutting wrote:
Andrzej Bialecki wrote:
Ok, I just tested IndexSorter for now. It appears to work correctly,
at least I get exactly the same results, with the same scores and the
same explanations, if I run the smae queries on the original and on
the sorted index.
Here's a more
Doug Cutting wrote:
Andrzej Bialecki wrote:
Ok, I just tested IndexSorter for now. It appears to work correctly,
at least I get exactly the same results, with the same scores and the
same explanations, if I run the smae queries on the original and on
the sorted index.
Here's a more
Doug Cutting wrote:
Andrzej Bialecki wrote:
I tested it on a 5 mln index.
Thanks, this is great data!
Can you please tell a bit more about the experiments? In particular:
. How were scores assigned to pages? Link analysis? log(number of
incoming links) or OPIC?
log()
. How were
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Doug Cutting wrote:
Andrzej Bialecki wrote:
. How were the queries generated? From a log or randomly?
Queries have been picked up manually, to test the worst performing
cases from a real query log.
So, for example, the 50% error rate might not be typical, but could be
worst-case
Doug Cutting wrote:
Andrzej Bialecki wrote:
I agree. I just thought that we would prepare the relase based on the
code in trunk/ , and in that case we would like to wait with the
merge before we do the release.
My definition of trunk is that it should be where the majority of
development
for a prolonged period.
* 0.7.x data formats are incompatible with the mapred branch. If we
maintain both versions, those who want to migrate will have to convert
their data.
* the mapred version can be run in a local mode, which requires just a
single machine.
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, and it's best to
catch him now, before he realizes that there are other ways of spending
time than hacking Nutch code... ;-)
So, I'd like to call for a vote on adding Stefan as a commiter.
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.
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.
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in Apache projects.
I believe there is a similar library in Jakarta Commons, I don't know if
it provides similar functionality...?
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NutchConf per JVM it doesn't change
anything. In case you want to run several different configs in a single JVM
this approach provides the solution. We could follow this strategy for other
plugin registry facades. Comments?
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Andrzej Bialecki wrote:
URLFilters:
private URLFilters(NutchConf) {
// initialize plugins based on this instance of NutchConf
}
public static URLFilters get(NutchConf conf) {
URLFilters res = (URLFilters)conf.get(urlfilters.key);
if (res == null) {
res
, but then you have to remember to
call setConf() before you do anything else...
I'll work on this to see where it leads.
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the segment data. So,
after you slice the segments you need to re-index them. Sorry.
I believe it's possible to do the index slicing, it's just not
implemented yet...
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is not just a
plain precision, recall, tf/idf and other tangible measures, it's also a
sort of political statement of the engine's operator. ;-)
To conclude, I will add the IndexSorter.java to the core classes, and I
suggest to continue the experiments ...
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American Jeff Bowden wrote:
Andrzej Bialecki wrote:
Hi,
I'm happy to report that further tests performed on a larger index
seem to show that the overall impact of the IndexSorter is definitely
positive: performance improvements are significant, and the overall
quality of results seems
Stefan Groschupf wrote:
Hi,
Since we know that our httpclient plugin has some problems may it is
sensefully to update to the new library,
I guess this is some work, but may someone is interested to take the
job.:)
I'll take it, thanks for the heads-up.
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interested
in Nutch history can always retrieve them from SVN or from the past releases.
If I don't hear any objections, I'll do it some time during Christmas.
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Hi,
I just commited a large patch to cleanup the trunk/ of obsolete and
broken classes remaining from the 0.7.x development line. Please test
that things still work as they should ...
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, threads, parsing); // fetch it
Also the Javadoc build has million errors.
Fixed. Thanks for spotting this!
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maxDoc is zero?
Ka-boom! ;-) You're right, this should be wrapped in an IOException and
rethrown.
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Thomas Jaeger wrote:
Hi Andrzej,
Gal Nitzan wrote:
It seems that Trunk is now broken...
DmozParser seems to be broken, too. It's package declaration is still
org.apache.nutch.crawl instead of org.apache.nutch.tools.
Fixed. Thanks!
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around with them - they work properly
even now.
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Piotr Kosiorowski wrote:
Andrzej Bialecki wrote:
Hi,
I just commited a large patch to cleanup the trunk/ of obsolete and
broken classes remaining from the 0.7.x development line. Please test
that things still work as they should ...
Hi,
I am not sure what is wrong but a lot of JUnit
produce an MD5 digest, just differently. I'll fix it.
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Doug Cutting wrote:
Andrzej Bialecki wrote:
Using the original index, it was possible for pages with high tf/idf
of a term, but with a low boost value (the OPIC score), to outrank
pages with high boost but lower tf/idf of a term. This phenomenon
leads quite often to results
of the
LuceneQueryOptimizer.LimitedCollector constructor, instead of
super(maxHits) it should be super(numHits) - this was actually the bug,
which was causing that mysterious slowdown for higher values of MAX_HITS.
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Rod Taylor wrote:
During a fetch I have recently started getting these (pretty
consistently).
Fixed. Thanks!
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:) in the revision r365576. Please
report if it doesn't fix it for you.
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http
this job, can I get a go from the other developers?
+1 from me.
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Jérôme Charron wrote:
Excuse me in advance, I probably missed something, but what are the use
cases for having many NutchConf instances with different values?
Running many different tasks in parallel, each using different config,
inside the same JVM.
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sort of use with
CachingFilters, only they propose to store them on-disk instead of
limiting the cache to relatively small number of filters kept in RAM...
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by
tasktrackers to instantiate local tasks using copies of the original
NutchConf instance.
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didn't see any problems, I think you can go ahead.
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?
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the content).
Is it easy to reproduce this if I knew the seed urls? If that's the
case, please send me the seed urls (contact me off the list, if it's
sensitive).
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the URLFilters and
do the score calculations.
Any comments?
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the performance somehow, since we do not need to scan the plugin
folder and time.
Yes, I agree on both accounts. :-)
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___. ___ ___ ___ _ _ __
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,
Andrzej Bialecki
___. ___ ___ ___ _ _ __
[__ || __|__/|__||\/| Information Retrieval, Semantic Web
___|||__|| \| || | Embedded Unix, System Integration
http://www.sigram.com Contact: info at sigram dot com
... OTOH,
perhaps it's a premature micro-optimization. We can move it to metadata
for now, but I see it as a strong candidate to be moved back...
--
Best regards,
Andrzej Bialecki
___. ___ ___ ___ _ _ __
[__ || __|__/|__||\/| Information Retrieval, Semantic
on?
Please do go on!
--
Best regards,
Andrzej Bialecki
___. ___ ___ ___ _ _ __
[__ || __|__/|__||\/| Information Retrieval, Semantic Web
___|||__|| \| || | Embedded Unix, System Integration
http://www.sigram.com Contact: info at sigram dot com
with:
java.lang.ClassCastException: java.util.ArrayList
-Matt Zytaruk
Could you please add a call to printStackTrace() in that catch{}
statement, so that we know where the exception is thrown?
--
Best regards,
Andrzej Bialecki
, and leave
this code to handle older versions...
--
Best regards,
Andrzej Bialecki
___. ___ ___ ___ _ _ __
[__ || __|__/|__||\/| Information Retrieval, Semantic Web
___|||__|| \| || | Embedded Unix, System Integration
http://www.sigram.com Contact
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