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We decided to use md5 over the other options. Some reasons included:

md5 creates a balanced tree. With the numerical way, directories would vary from having 1 to 10,000 files in them, assuming 3 levels of directories in the form "1/2/3".
IDs of less than 3 characters get treated the same way. (With the numerical version, files ended up in higher level directories, or got padded with zeros).
It's still not very hard to find a directory "by hand" if a programmer needs to do that. Using md5 on the ID on the command line will quickly reproduce the result. This would work as well:
```
find ./uploads_dir -name '1234.jpg'
```
I also found out we need to plan for more like 1.5 million images.

Mark Stosberg

In reply to Re: •Re: Need directory scheme to store 400,000 images by markjugg
in thread Need directory scheme to store 400,000 images by markjugg

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