Forum Moderators: Robert Charlton & goodroi
I've checked other places and they say the old PageRank but maybe we're on the verge of another PageRank change?
Anyone notice this?
But two of my satelite domains lost some PR (from PR4 to PR3)despite the same/ similar number in backlinks.
I have several sites. Two of them went to PR0. On of my sites that in early October went from getting 100 distincts a day to getting 1500 distincts a day at a minimum. Some days I get 20,000+ distincts. Looking at my site reports I know I gained 500+ backlinks during the past 3 months. The thing is google is only showing 90, and of those 90 80 of them are from one blog that added my site to his role.
I think the backlinks update is stable somehow now in google datacenters. But it's obviously that the snapshot of the toolbar has a glitch.
All that said, I don’t think the backlinks they are showing are correct yet. Oh yeah, that site had a PR3 before the PR update and is still showing a PR3 unlike two of my other sites going to a PR0.
However I am seeing ALOT of spammy sites ranking within the first 3 pages of results on many terms. Lots of mysimon,bizrate,nextag,ebay and yah shopping pages showing up which is terrible for results .. guess I'll be doing my personal searches somewhere else if I want quality results.
I do see that there are maybe 10% less google referrals over the last week, but honestly any slowdown in business for us is a little expected as everyone is just now getting their credit card bills from christmas and are probably in shock.
On our pr flux. Could it be possible that sites that are seeing a 0 could be experiencing this because a change for them is coming and before they roll out new results they simply reset the TBPR temporarily for those sites?
[edited by: Bewenched at 8:32 pm (utc) on Jan. 11, 2007]
We were at #3 for SERP "search ebay" (only behind eBay itself) and now we're not in the top 100.
Could it be possible that sites that are seeing a 0 could be experiencing this because a change for them is coming and before they roll out new results they simply reset the TBPR temporarily for those sites?
Very possible, it could also be that the pr0 phenomenon was strictly on one or a few DC's that we seen before being recalculated.
Netmeg, make sure that the url you want shows a 200 ok in the a hader check, and that the other is redirected using 301 to the preferred domain, then check that the response is 301 to the preferred domain.
On the other hand, the "google never makes mistakes" folks I'm sure are preparing their posts on why 20% of the Internet just went PR0.
To my knowledge, this is nonsense: Calculation of Pagerank, as described on various recources all over he internet, requires an enormous amount of computer-cpu-time and cannot be performed while Adam Lasnik is having a cup of coffee. This is the reason why we talk about "updates", i.e. periods when new values for TBPR, silently calculated in the background days or weeks before, are rolled out to the datacenters.
If you recently have come across some newer research papers or patents describing how pagerank can be calculated or estimated without looping through this enormous matrix of backlinks, please let me know the source.
[mattcutts.com...]
Could it be possible that sites that are seeing a 0 could be experiencing this because a change for them is coming and before they roll out new results they simply reset the TBPR temporarily for those sites?
I thought of this too. A crazy thought crossed my mind that maybe, somehow, possibly these sites were getting special attention from Goog, because many of them were long, established, authority sites.
Off topic >>
Heck... maybe for these sites, they will start to show pink pixels instead of green to indicate they've got super TrustRank! ;)
I need your valuable remarks over the latest Google update which held on 10th January 2007. It was PR/BL update and still in progress. I observed that this time Google totally discounted the reciprocal links. I had website with PR 5 and i was running reciprocal link building campaign, but now it has PR 4. Another one on which I was running Inbound link building campaign, PR before Google Update was 3 now it has PR 4 with internal pages has PR 2. It makes me happy.
Please check out with your sites and tell us about your feedbacks.
Thanks,
SandySEO
However, a scoring change like that would not be part of a PR Update -- which is more accurately described as a PR export. The new PR numbers we are now seeing have already been in use to score the SERPs. It' just that we only now get to see the numbers -- which are already just a "historical snapshot."
Here's a post from GoogleGuy back in 2005, where he mentions both the continuous calculation of PR and the once-in-a-while update of the toolbar values.
June 2, 2005...we typically show new backlink sample sets every 3-5 weeks or so. We have a bank of machines that computes PageRank continuously (and continually, I suppose; I wasn't an English major), but we only export new visible PageRanks every 3-4 months or so.
[webmasterworld.com...]
For a discussion of changes to the way Google is ranking urls, visit January 2007 Google Changes [webmasterworld.com].
Let's keep this thread focused on the newly visible PR values that Google is trying to export to the toolbar.
PS. backlinks seem to have been reduced though.
Tool bar 6-0-6, 1/4 increase in backlinks on "link:", now all's back on an even keel.
First the listed backlinks updated and the displayed toolbar PR went to 0, SERPs/traffic remained steady, now toolbar PR has come back into line.
Update: A few people were seeing PageRank 0 for their site. There was a small auxiliary push that needed to happen to complement the PageRank push, and that push happened a few hours ago (i.e. Jan 11, 2007). If you were getting stressed, you might want to re-check now. If you never even noticed, well, good for you.
The other PR6 site is having WILD 300% fluctuations, probably as always ending in some form of traffic disaster.
Google is toying with us.
Edit:
Now it went back to PR5 within 10 minutes after being on 6 since yesterday.
What I am noticing is that digg, reddit, and netscape backlinks are not being tallied in the backlink. Is anyone else noticing the same thing?
One of my sites has a PR5 on its non-www url, and a PR4 on the www version. I have it set in WMT to show everything on the www, so I'm not even sure why the non-www would be still be in the index.
I have the exact same problem:
www.domain.com and domain.com with different PR
Site:www.domain.com Does not show my home page
Site:domain.com Shows my home page but others listed as www.domain.com in front of each page
My site is no longer rank for main domain keyword because the PR for non-www is lower than www version.
I also changed it on Google WMT to display with www option, but no changes so far.
Anyone else with exact same situation?
We have a bank of machines that computes PageRank continuously (and continually, I suppose; I wasn't an English major), but we only export new visible PageRanks every 3-4 months or so.
I always understood this in such a way, that of course a set of machines is "continuously" running hot, calculating Pagerank, but that the calculation algo itself takes several days, weeks or perhaps even the mentioned 3-4 months to run through. And that it is always a 'dangerous' adventure to export the stuff to the databases serving the actual search-requests. Not to mention questions of error-probability on hardware level, which can have a huge effect in such a an iterative system.
Oliver - I think 'Local rank' or 'hilltop' would take the basic pr calculation and produce a serp with all the other factors. Then modify it according to the link pattern within the serps. Thus pr is being modified on the fly, but because the serps has already reduced the number of sites involved, it takes little cpu time.
thx for the info. Do you have any links to some more technical papers at hand? To my understanding, no matter what you do to the data material in a first step, the core of the pagerank algo is a calculation of approximately 100 loops over a (thin) matrix of the size of the square of the number of websites indexed. I never understood whether and how this process can be accelerated by building local, thematic or structural clusters. I'm always willing to learn and I must admit I wasn't really up to date when the concepts of 'local rank' and 'hilltop' were discussed.
