Why are most pages on my subdomains not cached?

subdomain, duplicate contents

[johnlim9988]

Hi,

If a website has many sub directories and also have 28 subdomains.

Will the pages in subdomains be cashed?

Is it ok to have many sub directories (over 100) and sub domains (28) together?

My friend's site sell a thing and this thing has many categories.

At first, he list all the things according to locations, so have domainname.com/usa/ca/san-diego/allthings.html;
domainname.com/usa/fl/miami/allthings.html;
domainname.com/china/shanghai/allthings.html etc etc

Then he also list all things by categories first (use sub-domain) then list by location,

so also have following file structure,
category1.domainname.com/usa/ca/san-diego/things1.html;
category2.domainname.com/usa/ca/san-diego/things2.html;
category3.domainname.com/usa/ca/san-diego/things3.html;
.............
category28.domainname.com/usa/ca/san-diego/things28.html;

category1.domainname.com/usa/fl/miami/things1.html;
category2.domainname.com/usa/fl/miami/things2.html;
category3.domainname.com/usa/fl/miami/things3.html;
.............
category28.domainname.com/usa/fl/miami/things28.html;

category1.domainname.com/china/shanghai/things1.html;
category2.domainname.com/china/shanghai/things2.html;
category3.domainname.com/china/shanghai/things3.html;
........
category28.domainname.com/china/shanghai/things28.html;
etc etc

Now the probelm is that we create many unique contents at files like,
domainname.com/usa/ca/san-diego/allthings.html;
domainname.com/usa/fl/miami/allthings.html;
domainname.com/china/shanghai/allthings.html etc etc

We don't have many unique contents at files like,
category1.domainname.com/usa/ca/san-diego/things1.html;
category2.domainname.com/usa/ca/san-diego/things2.html;
category3.domainname.com/usa/ca/san-diego/things3.html;
.............

Now the problem is that the site don't have good rankings.

What should we do? Need change the file structure?

Thanks.

John

[johnlim9988]

Anybody has any good ideas?
IF change sub-domains to sub-directories, I am afraid we will lost some traffic even put 301 redirect.

If put 301 redirect then the links still have power?

For example, if before it is sub1.domain.com
now use 301 redirect sub1.domain.com to domain.com/sub1/

Then some links originally point to sub1.domain.com will also be good to domain.com/sub1/?

No need to ask others to change links from sub1.domain.com to domain.com/sub1/, right? As already 301 redirect, right?

IF need ask others to change the links from sub1.domain.com to domain.com/sub1/ then it will be troubsome.

Will it affect the ranking if change sub1.domain.com to domain.com/sub1/ after 301 redirect?

[tedster]

Yes, usually a 301 will pass backlink influences to the new URL.