In this brief overview you can read what you need to do if you have stored messages in a file and now you wish to switch to database.
By default, messages of all users are stored in a file. These files are stored in the folders of users (for example, the messages of user admin are also stored in file) (Figure 1).
On Figure 2 you can see the sent messages of user admin stored in file. The file names of these messages are their GUID.
If user admin sends out messages, sent messages will be stored in file. Then messages are forwarded to the SMSC (SMS center) that returns a delivery report about messages. These delivery reports will be matched with the messages stored in the file (Figure 3).
However, files are easy to work with, if Ozeki NG SMS Gateway needs to process great numbers of messages the system can slow down because of the hard disc usage. Since Ozeki NG SMS Gateway stores messages in 7 Kb files, hard disc is engaged to a great extent.
Switch to database
This situation can be avoided by switching to database. Practically it means that messages will be stored in a database instead of files that will ensure a faster system (Figure 4).
In case of sending messages, messages will be stored in the database and the returned delivery reports will be matched the original messages stored in the database (Figure 5).
Now if you stored your messages in file and switch to database problems can occur deriving from the fact that there can still be messages stored in the file to which delivery reports have not been returned yet. After switching to database, delivery reports will still be returned to messages that have been stored in file. But since the storage in file option is disabled, Ozeki NG SMS Gateway will only look for original messages in the database (and not in file any more). So if there is a delivery report that is returned for a non-existing message (messages that were originally stored in file) the following error message will appear:ERROR 2202:
To solve this issue you can use Message importer
that will allow you to import messages from file to database. Therefore, the
system will be able to match the delivery reports with messages that have already
been imported into the database.