when does google update?

when will they update the visible pagerank? How often do they update their dmoz directory? Is this known?

Ty

Updates with regards to PageRanks arent that frequent, and it is pretty hard to speculate. With regards to DMOZ they are infamous for taking excessively long amounts of time to get websites entered into the Directory regardless of their activity, or PageRank.

thanks

I didn't mean dmoz website itself but the google 'mirror' version of it, i'm already listed in dmoz but just curious when google updates their directory

they use to update PR every 3 months or so

DMOZ isn't what it once was.. I wouldn't worry about it too much.

Originally Posted by rex_b

they use to update Page Ranking every 3 months or so

anyone has an idea when the last one was?

Originally Posted by FlyBoy73

DMOZ isn't what it once was.. I wouldn't worry about it too much.

i know every website that gets listed has higher p.r. often 5

http://www.seocompany.ca/pagerank/pa...date-list.html
and
http://www.mattcutts.com/blog/whats-an-update
if you don`t see it on that page.

Google does update periodically, but there is no preset time or period in which this is done. Typically, Google will roll over updates on backlinks and page rank on its data centres when a complete index update and review has been completed on indexed documents and document integrity on that centre.
Because Google has lots of data centres, page rank updates happen quite far apart, sometimes in excess of 3 - 6 months.
The important thing is to focus on building your websites link profile, do not try and quantify early on, one month of hard link building won't always give you what you'd expect, especially since Google will not release all link information.
Keep building links, create some good link bait, some website tools and resources, and share something with the public, this is more likely to attract more natural backlinks.
Good luck

Can anyone tell me how a page of a site vanishes from a normal page suddenly and comes back at once after a week.It really happened with me.