Hi, I also noticed that we can disable storing content of pages which I use. I wonder why someone needs to store content? Also, in case of files, is there a way to tell nutch not to download the whole file but let say 1000 bytes from the beginning and parse and index information only in that part of files?
Thanks. A. -----Original Message----- From: yanky young <[email protected]> To: [email protected] Sent: Tue, 3 Mar 2009 6:41 pm Subject: Re: what is needed to index for about 10000 domains Hi: Dog cutting has ever write a wiki about hardware requirement of nutch, you can check it out http://wiki.apache.org/nutch/HardwareRequirements good luck yanky 2009/3/4 John Martyniak <[email protected]> > Regarding the machine, you could run it on anything, it all depends what > kind of performance you want. So yes you could run it on the machine that > you have or something like the linux machine that I have. And the DSL > connection should be fine, you just need to make sure that it stays up the > whole time, because if not it will start erring out, and you will have to > re-fetch that whole segment as there is no way to pick up from where you > left off. > > The only reason that I merged the segments was that I had many of them, and > I wanted to build a big one before I started creating new ones, another > advantage of merging is that you can use that to clear out unwanted urls. > For example I had a bunch of .js files in there, that I didn't want to have > as part of the index, so I cleared them out. > > I used "bin/nutch mergesegs". > > Regarding merging the other parts, I have never used, but I don't think > that it is necessary unless you have multiple linkdbs, etc. in my case I do > not. > > -John > > > > > On Mar 3, 2009, at 7:14 PM, [email protected] wrote: > > >> Hi, >> >> I will need to index all links in domains then. What do you think a linux >> box like yours with DSL connection is OK to index the domains I have? >> >> Why only segments? I thought we need to merge all sub folders under crawl >> folder. What did you use for merging them? >> >> Thanks. >> A. >> >> >> >> >> >> >> >> -----Original Message----- >> From: John Martyniak <[email protected]> >> To: [email protected] >> Sent: Tue, 3 Mar 2009 3:21 pm >> Subject: Re: what is needed to index for about 10000 domains >> >> >> >> >> >> >> >> >> >> Well the way that nutch works is that you would inject your list of >> domains into the DB, and that would be the starting point. Since nutch uses >> a crawler it would grab those pages, and determine if there are any links on >> those pages, and then add them to the DB. So the next time that you >> generated your urls to fetch, it would take your original list, plus the >> ones that it found to generate the new segment.? >> ? >> >> If you wanted to limit it to only pages contained on your 10000 domains, >> you could use the regex-urlfilter.txt file in the conf directory to limit it >> to your list. But you would have to create a regular expression for each >> one.? >> ? >> >> I am not familiar with the merge script on the wiki, but have merged >> segments before and it did work. But that was on Linux, don't think that >> should make a difference though.? >> ? >> >> -John? >> ? >> >> ? >> >> On Mar 3, 2009, at 5:10 PM, [email protected] wrote:? >> ? >> >> ? >>> >> >> Hi,? >>> >> >> ? >>> >> >> Thanks for the reply. I have list? of those domains only. I am not > sure >>> how many pages they have. Is a DSL? connection sufficient to > run nutch in >>> my case. Did you run nutch for all of your pages at > once or separately for >>> a given subset of them. Btw, yesterday I > tried to use merge shell script >>> that we have on wiki. It gave a lot > of errors. I run it on cygwin though.? >>> >> >> ? >>> >> >> Thanks.? >>> >> >> A.? >>> >> >> ? >>> >> >> ? >>> >> >> ? >>> >> >> ? >>> >> >> ? >>> >> >> ? >>> >> >> ? >>> >> >> -----Original Message-----? >>> >> >> From: John Martyniak <[email protected]>? >>> >> >> To: [email protected]? >>> >> >> Sent: Tue, 3 Mar 2009 1:44 pm? >>> >> >> Subject: Re: what is needed to index for about 10000 domains? >>> >> >> ? >>> >> >> ? >>> >> >> ? >>> >> >> ? >>> >> >> ? >>> >> >> ? >>> >> >> ? >>> >> >> ? >>> >> >> ? >>> >> >> I think that in order to answer that questions, it is necessary to > know >>> how many total pages are being indexed.?? >>> >> >> ?? >>> >> >> ? >>> >> >> I currently have ~3.5 million pages indexed, and the segment > >>> directories are around 45GB, The response time is relatively fast.?? >>> >> >> ?? >>> >> >> ? >>> >> >> In the test site it is running on a dual processor Dell 1850 with > 3GB >>> of RAM.?? >>> >> >> ?? >>> >> >> ? >>> >> >> -John?? >>> >> >> ?? >>> >> >> ? >>> >> >> On Mar 3, 2009, at 3:44 PM, [email protected] wrote:?? >>> >> >> ?? >>> >> >> ? >>> >> >> Hello,?? >>>> >>> >> ? >>> >> >> ?? >>>> >>> >> ? >>> >> >> I use nutch-0.9 and need to index about 10000? domains.? I want to >> > >>>> know? minimum requirements to hardware and memory.?? >>>> >>> >> ? >>> >> >> ?? >>>> >>> >> ? >>> >> >> Thanks in advance.?? >>>> >>> >> ? >>> >> >> Alex.?? >>>> >>> >> ?? >>> >> >> ? >>> >> >> ? >>> >> >> ? >>> >> >> ? >>> >> >> ? >>> >> ? >> >> >> >> >> >> >
