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A new version of Diafaan SMS Server will be release in the coming weeks, hopefully before the end of the month.

If you need more time to evaluate Diafaan SMS Server, please send us your company name and contact details by email and I will provide you with an extension of the trial license.

Regards, Henk

A send speed of 300 to 500 messages per second is not likely to be achievable with Diafaan SMS Server. In stress tests I have seen send speeds of a little over 200 messages per second using one SMPP connection. It might be possible to increase that by using more SMPP connections but I have not actually tested this.

The main bottleneck in Diafaan SMS Server is the central message database, this database is used to store queued messages and also to match send results from the SMPP server with the original messages. This database has to do a lot of work and the speed depends mostly on the speed of the drive where it is installed. The message queue database in Diafaan SMS Server is stored in the file "%ProgramData%\Diafaan\Diafaan Message Server\MessageExchange.sqlite", if that file is located on an SSD drive it will be a lot faster than on a (slow) hard drive.

The value of the "MaximumBatchSize" property is also important, it determines how much messages are read from the database in one batch and a higher value reduced the strain on the database considerably. In the next version of Diafaan SMS Server we will remove the limit of 100 from the "MaximumBatchSize" property, maybe that will also have some effect on the message throughput. Please note that a higher value of "MaximumBatchSize" also has some downsides, it can slow down message throughput when there are a lot of send errors from your SMPP server (or GSM modem).

When you want to upgrade Diafaan SMS Server to a higher edition within a year after you purchased the license, you only have to pay the price difference. After a year you have to pay the normal price. If you want to upgrade you can send us an email with the upgrade request and the serial number or purchase order number and we will send you the upgrade link to the order page.

Regards, Henk

Unfortunately, this is not something that Diafaan SMS Server was designed for. In Diafaan SMS Server, message are always stored in the send queue database before being sent and the performance of this database limits the maximum send speed. We developed Diafaan SMS Server for ease of use and versatility, not for raw speed.

In the optimum configuration, when the message database is stored on an SSD or memory disk, it might be possible to get speeds of up to 200 messages per second but if I understand your requirements, that is not enough in your situation.

Regards, Henk

Hello Sarfaraz,

There are a three settings in the advanced properties of the SMPP Gateway that have an effect on the message throughput to the SMPP server:

MaximumBatchSize
This is the number of messages that are pre-loaded in the SMPP Gateway at the same time. For the amount of messages you are talking about you can set this value to 200 or perhaps even 500.

AsyncModeWindowSize
This is the maximum amount of messages that are sent to the SMPP server without waiting for a response. You can set this value to the maximum that is supported by your SMPP service provider.

MaxMessagesPerMinute
The maximum throughput of the SMPP Gateway. This value can also be set to the maximum that is supported by your SMPP service provider.

Depending on your server, and especially the speed of the hard disk, the maximum throughput of Diafaan SMS Server is somewhere between 30-100 messages per second.

Regards, Henk