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Possibility to use Postfix + Omega without sasldb
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Donni Offline
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Post: #6
RE: Possibility to use Postfix + Omega without sasldb
DPR Wrote:I doubt that the sasldb method with a file scales better than a mySQL DB if you do have a lot of users.
I must admit that I don't havemuch experience with *really* huge mailservers but let's see what the "real professionals" say Wink
Here is an excerpt of "The Book of Postfix":
Quote:The principal difference between a database map and an indexed map is that you do not need to restart a daemon when there is a change to the database. [...] The drawback to this approach is that the database may not be able to handle the number of queries gracefully, because Postfix needs to perform al least three queries for each lookup in a map [...] Under heavy load, the databse backend could stop working, and your mail service would be vulnerable to a self-induced meltdown or a denial-of-service attack. This possibility should not prevent you from using database backends, but you should be aware of the risk.
[...] latency can be another problem. Database queries have a higher latency than indexed maps because Postfix must connect to the database, send the query, and then wait for the result. With an indexed map, Postfix has only to consult data that is already loaded in memory. [...]

But I fully agree that it would be cool to choose wether to use indexed or database maps (at least one day Wink).
04-18-2007 02:23 AM
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RE: Possibility to use Postfix + Omega without sasldb - Donni - 04-18-2007 02:23 AM

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