image Cache question

What is the image cache for?

I have 11,000 products where I have the larger sized image used on the product page, and I have the _thumb versions for results pages too. So, straight away I have 22,000 images to upload to the client's website. The webassist folder / plugins / catalog / scripts / image_cache / imagesupload / has three more folders in it each with what I can only assume to be extra copies of the images at the root level folder imagesupload.

Do I need these extra images in the image cache as I now have thousands upon thousands of images to download and reupload due to moving to a new server.

I didn't create these extra images, and I added the content to the database via an SQL insert statement, and it seems that some of my 11,000 images have got a image cache version, and some don't.

So what is the image cache for, and do I need to use the content within it? Can I ignore it?

Thanks

the image cache is automatically generated if it doesn't exist.

Some pages show the product images at different sizes. A new copy of the original image is automatically created at the needed size if it doesn't already exist.

you can ignore the image cache folder when moving from one server to another, and let the resiZed images get regenerated as needed.

OK, thanks Jason.

So, in that respect, I have downloaded everything that I should have to my local folder, but there are some missing images for some reason, it's fine on the remote server that I am moving from. I have tried to download it a bit at a time and in doing so, I have now got an error message on the home page in the left and right pods:

function.imagejpeg]: Unable to open 'image_cache/~username/imagesupload/crop/abc_w207_h146/abc_09251137.jpg' for writing: No such file or directory in /website/folder/webassist/plugins/catalog/scripts/resize_image.php on line 213
webassist/plugins/catalog/scripts" class="popularImage" />

but resize_image.php is there...

Mat

make sure that the image_cache/ folder exists and that is has full read write access permissions to allow for the cached imaged to be created.

Actually, don't worry! I have just realised that I am meant to be looking at line 213 of resize_image.php rather than the code on the home page.

213 of resize_image.php refers to permissions and then the penny dropped. Because I have downloaded the whole size to collect everything including amends and new images byt the client, I have downloaded a folder that is locked... I just needed to change permissions at root level and apply to all enclosed items so the script could create the files needed automatically as you said.

Just thought I'd highlight this for anyone who has the same problem!

Thanks

Mat

Some images that are in the images folder are not showing. Can I delete the images in the cache folder and start again?

The images not displaying are certainly on the remote server and should be showing fine!

Is there any reason for this happening?

I've also re-uploaded a few of the images in question, but still no luck!

And I've also just tried to edit it in the admin area, but still no joy!!

send a link where i can see the problem please.