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Migration from one CMS to another

How big an impact does this have on SEO?

         

hedwig

2:49 am on Apr 3, 2007 (gmt 0)

10+ Year Member



Hi
I have a client that has more than 8000 pages of content on an old and clunky CMS. He wants to migrate to DNN, and has asked me to help him out. The site is well established, very old, and has nearly 9000 links into the home page and a further 2000 or so links into deeper pages.

I asked him how important search was to his business, and needless to say, the answer is "very". The current site is well-indexed, and ranks well for a number of search terms (which point to the home page), but from listening to the client talk, much of the traffic that leads to sales is derived from searches at the long tail end i.e. people searching for very specific items, for which there are no competing pages so he always comes out number 1 - these items are not on the home page, but in deeper pages.

My concern is this: if we move the content from old CMS to new CMS, whilst the content will be the same, the URL's will be different. I assume that this is going to have an effect on his rankings, but cannot quantify what this effect will be.

One of the possibilities open to me is to develop a URL re-writer for him which interprets old urls and forwards them to the correct page, which is fairly easy, but writing a url rewriter to parse HTML on the way out of the server so that to the search engines the site looks the same is not a particulalry trivial task.

The question is: do I need to do this, or will his ranking position be restored once the site has been deeply indexed and the new urls picked up?

Cheers

Philosopher

4:07 am on Apr 3, 2007 (gmt 0)

WebmasterWorld Senior Member 10+ Year Member



I would be VERY reluctant to do this if you cannot keep the URL structure the same.

It sounds like when you make the change, the only page that will stay the same is the homepage, all other pages (or most) will be new URLs.

The best case scenario is that your client will likely lose the vast majority of his search engine traffic until all the pages are properly reindexed (maybe 3-6 months). The worst case scenario is the site is "lost" and either never recovers or recovers in somewhere over a years time.

Another thing to consider is the deep links. All those will need to be 301'd to their new URLs or you will lose the benefit of all the acquired deep links to the site.

This kind of a major URL restructuring is never a good thing unless it is absolutely necessary.

If it ain't broke..don't fix it. :)

vik_c

4:48 am on Apr 3, 2007 (gmt 0)

10+ Year Member



If it ain't broke..don't fix it. :)

Very true but it's virtually impossible to scale up a content site without using CMS of some sort.

Haecceity

8:37 am on Apr 3, 2007 (gmt 0)

10+ Year Member



Yes, if it's not scaleable then it's broken. I'd say go for it, but make sure you 301 all the old pages to the new locations. I recently did the same thing with a smaller site and so far the ride's been smooth.

hedwig

11:20 am on Apr 3, 2007 (gmt 0)

10+ Year Member



Hi Everybody

Thanks for the very welcome advice. I'm basically going to lay out before the customer his options and what the implications are, and let him decide.

All the Best
Hedwig

sandpetra

8:38 pm on Apr 4, 2007 (gmt 0)

10+ Year Member



I thought about doing this and it basically zeroes your site in Google for a an undetermined amount of time.

Someone on WebmasterWorld asked: Instead of zeroing the site, why not create a totally new one? Good advice - i took it.

On the other hand i've seen a site of PR 5 go through such a change and positions in Google returned and where better within 2-3 months.

The question is - can you afford this?

BillyS

8:43 pm on Apr 4, 2007 (gmt 0)

WebmasterWorld Senior Member 10+ Year Member



>>If we move the content from old CMS to new CMS, whilst the content will be the same, the URL's will be different.

I see absolutely no reason for new URLs. Why do you think you need to do this? My site is about 1,300 pages in Joomla and I can make a URL pretty much anything I'd want.

nippi

9:41 pm on Apr 4, 2007 (gmt 0)

WebmasterWorld Senior Member 10+ Year Member



it might be a chnage in technology.. pages might current be asp...

in any case, you will have no problems, as long as you have a 301 rule from old pages to new.

none,

your traffic and rankings will transfer.

I have had to do this three times, after an unhappy move from

asp to asp.net,
then to php,
then to a new php system with completely different re-write rules.

as long as your 301 is done properly, you will be fine.

sandpetra

10:29 pm on Apr 4, 2007 (gmt 0)

10+ Year Member



Exactly what would be the best way to approach this?

BillyS

11:18 pm on Apr 4, 2007 (gmt 0)

WebmasterWorld Senior Member 10+ Year Member



>>it might be a chnage in technology.. pages might current be asp...

Joomla has a SEF Advance module that allows you to pick any suffix you want. So even if you're running php you can still have a URL ending in .asp That's a commercial module that costs all of 40 euro. I'd think other CMS would have similar offerings.