Re: [exim] DbLessGreyListing

>> Interesting implementation though I think some hashing would have to be done
>> on the IP address to separate the directories otherwise it's not scalable
>> (filesystem limits within a single directory and the management thereof).
>> Also, not having the data in a database means only one server could access
>> it unless you wanted NFS shares, but then you are relying on one box.
>
> I do not know how the above Greylisting is implemented. Once I did some
> attempt using the file system as database too (one (empty) file per
> connecting IP in some hierarchy). It ate all my inodes (was a small
> partition).
>
> So - if it is based on the same idea, make sure to have enough inodes
> (df -i).

I have a script that cleans out any greylist files older then 6 hours.
The greylist directory seems to peak at about 60k files. df -i says
I am using 1 percent of my inodes. Also, since this is Maildir based
system I may very well save inodes due to less mail volume.

Matt