Granted, Colin, but I wouldn't want anyone coming across a simple implementation like this and then expand upon it without the realization that memcached is not a persistent data store.
On Tue, Jul 28, 2009 at 12:41 PM, Colin Pitrat <[email protected]>wrote: > > Well, I'd say that for double-post and spam control, it's not a big > problem if sometime it doesn't work. I mean, with this kind of > algorithm he already accept one spamming message, so two is not a > problem. > > 2009/7/28 Josef Finsel <[email protected]>: > > Another question you might want to ask is how are you going to handle it > if > > the item has been evicted from the cache? Someone could be spamming you > and > > you wouldn't catch it. > > Granted, that would have to be a cache with a high-eviction rate but it's > > still a possibility you might want to consider. > > > > On Tue, Jul 28, 2009 at 12:04 PM, Beyza <[email protected]> wrote: > >> > >> Hi, > >> > >> This is not an important question, but I wonder the answer. > >> > >> When I develop websites by using memcache, I also use it for spam > >> checking. > >> > >> For example; When someone post a comment, or report something, or > >> search something, I create a memcache object and set an expiration > >> time, i.e. 5 seconds. It goes something like that > >> > >> memcache_set($memcache, "comment-check-userid", '1', 0, 5); > >> > >> I check every time whether this value is set or not. If it's set, I > >> consider it as a spam. > >> > >> My question is that, is it expensive to create this if you compare > >> with other options for this purpose? I could not find any information > >> about this on the internet. I am just curious :) > >> > >> Thanks from now on, > > > > > > > > -- > > "If you see a whole thing - it seems that it's always beautiful. Planets, > > lives... But up close a world's all dirt and rocks. And day to day, > life's a > > hard job, you get tired, you lose the pattern." > > Ursula K. Le Guin > > > > What's different about data in the cloud? http://www.azuredba.com > > > > http://www.finsel.com/words,-words,-words.aspx (My blog) - > > http://www.finsel.com/photo-gallery.aspx (My Photogallery) > > -http://www.reluctantdba.com/dbas-and-programmers/blog.aspx (My > > Professional Blog) > > > -- "If you see a whole thing - it seems that it's always beautiful. Planets, lives... But up close a world's all dirt and rocks. And day to day, life's a hard job, you get tired, you lose the pattern." Ursula K. Le Guin What's different about data in the cloud? http://www.azuredba.com http://www.finsel.com/words,-words,-words.aspx (My blog) - http://www.finsel.com/photo-gallery.aspx (My Photogallery) - http://www.reluctantdba.com/dbas-and-programmers/blog.aspx (My Professional Blog)
