<div dir="ltr"><p>Hello gents,</p>
<p>Just bumpped into Mnesia db and after studying it whole weekend I am still in exalted state by him. Since I dont believe "silver bullets" I diecided to ask Mnesia gurus before starting to prototype it. So what I am looking for is suppopsed to be high performance IMDB for mobile telco billing, currently our R&D department is considering off-the-shelf products like TimesTen, BerkleyDB, MySQL Carrier Grade and so on. But there are also a lot of issues even though they are comercial. </p>
<p>could you dedicate some time to check whether Mnesia cover my very strict requirements:</p>
<p>1) The imdb is intended for storing big amout of subscriber fund items (like balances, counters: free traffic, free sms, free minutes, friendly numbers and etc)</p>
<p>2) The number of fund items may vary from 12 mln and up to 420 mln depending on telco provider, means scaling up and scaling out features are necessary</p>
<p>3) Fault tolerance and high availbility level of imdb should be "five nines" at least</p>
<p>4) The host OS is Windows, pls dont I ask me why so :) but this requirement is optional and can be substituted in case imdb provide high performance through the network</p>
<p>5) Locking read and respecting unlocking write requests shall be supported</p>
<p>6) Number of items per atomic locking read/unlocking write may vary from 1 till 20 items</p>
<p>7) As persistent storage supposed to use Oralce DB, where imdb will write all of changes asynchronously, and the fund items will be loaded from persistent storage during fisrt initialization, this req is optional though</p>
<p>8) And the most important requirements are the throughput of IMDb that should be at least 3000 locking read + write requests per second and latency of either read or write request should be not more than 10ms</p>
<p><br>Thank you,<br>Ksiztof</p></div>