These scratch card numbers are usually generated offline in batches. The data then takes two routes.
1) The numbers are loaded into the telephony network balance top-up system
2) The numbers go into the desired distribution channel
The top-up system has two main interfaces, one for receiving top-up requests (scratch ard number and phone number/MSISDN) and one towards the phone networks realtime charging system which maintains the subscriber balance (in GSM that's an IN).
The top-up system knows only about the issued but not used scratch card numbers, that reduces the data volume to whatever is out in the field. As soon as an scratch card number is activated, the top-up system adjusts the balance and forgets the scratch card number (less the usual logging and so on).
This implies that scratch card numbers may be re-used after activation, there's no need to remember that a scratch card number has been activated before. Actually the numbers are usually fixed length, that requires some sort of re-use.
The data volume (issued but not used scratch card numbers) and non-real-time-requirements allow for some standard database system.
The approach/technique/algorithm used to tackle this kind of a problem may be described as "remember only what you need to know in order to do the job".
One approach is to look at this the other way around:
If you generate the serial numbers, and manage their distribution, you can limit the number of unclaimed numbers in circulation, which will remain relatively static, and give predictable performance when checking if the number is unclaimed or not.
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这些刮刮卡号通常是离线批量生成的。然后数据会经过两条路径。
1) 号码加载到电话网络余额充值系统
2) 号码进入所需的分配渠道
充值系统有两个主要接口，一个用于接收充值请求（刮刮卡号码和电话号码/ MSISDN）和一个面向电话网络实时计费系统，用于维护用户余额（在 GSM 中是 IN）。
充值系统只知道已发行但未使用的刮刮卡号码，这将数据量减少到现场的数据量。一旦刮刮卡号被激活，充值系统就会调整余额并忘记刮刮卡号（减去通常的记录等）。
这意味着刮刮卡号码在激活后可以重复使用，无需记住刮刮卡号码之前已被激活。实际上，数字通常是固定长度的，这需要某种形式的重复使用。
数据量（已发行但未使用的刮刮卡号码）和非实时要求允许某些标准数据库系统。
用于解决此类问题的方法/技术/算法可以被描述为“只记住完成工作所需知道的内容”。
These scratch card numbers are usually generated offline in batches. The data then takes two routes.
1) The numbers are loaded into the telephony network balance top-up system
2) The numbers go into the desired distribution channel
The top-up system has two main interfaces, one for receiving top-up requests (scratch ard number and phone number/MSISDN) and one towards the phone networks realtime charging system which maintains the subscriber balance (in GSM that's an IN).
The top-up system knows only about the issued but not used scratch card numbers, that reduces the data volume to whatever is out in the field. As soon as an scratch card number is activated, the top-up system adjusts the balance and forgets the scratch card number (less the usual logging and so on).
This implies that scratch card numbers may be re-used after activation, there's no need to remember that a scratch card number has been activated before. Actually the numbers are usually fixed length, that requires some sort of re-use.
The data volume (issued but not used scratch card numbers) and non-real-time-requirements allow for some standard database system.
The approach/technique/algorithm used to tackle this kind of a problem may be described as "remember only what you need to know in order to do the job".
一种方法是以相反的方式看待这个问题：
如果您生成序列号并管理它们的分配，您可以限制流通中无人认领的号码的数量，这将保持相对静态，并在检查该号码是否存在时提供可预测的性能是否无人认领。
One approach is to look at this the other way around:
If you generate the serial numbers, and manage their distribution, you can limit the number of unclaimed numbers in circulation, which will remain relatively static, and give predictable performance when checking if the number is unclaimed or not.