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--- public:radio:2024:yaddnet_data_backup [19/04/24 09:56 BST] – john
+++ public:radio:2024:yaddnet_data_backup [06/03/25 06:49 GMT] (current) – external edit 127.0.0.1
@@ Line 2: / Line 2: @@
-====== Yaddnet Data Backup ======
+====== YaDDNet Data Backup ======
 ** Offsite Text file backups of all DSC messages **
-===== YaDDNet UDP Mirror =====
+  * Alan Spindel initially suggested an offsite backup of the DSC messages in 2019
+  * YaDDNet has had the facility to send copies of each new message out to specified IP addresses via UDP since that time
+  * The DSC messages are sent by UDP as simple plain text, for easy archiving
+  * The archived text file can be used if necessary to rebuild the SQL database table containing the DSC messages in case of disaster
+  * Since I'm now hosting YaDDNet again I decided I should run a UDP log receiver at home to improve the backup provision
+  * The daily archive files will be ''gzipped'' and stored on Dropbox
+    * I could share the link to anyone who is interested in using the saved data
+===== YaDDNet UDP Send to Mirror =====
+  * In the ''PyYadd.py'' function a DSC message is created from the raw incoming data from YaDD (and DSC Decoder) in a standard format.
+  * This involves converting MMSI -> Coast or Ship name, finding the ''[MID]'' and corresponding country etc.
+  * Prior to using the newly created message to inject new data into the SQL server ''PyYadd.py'' calls the function ''send_to_mirror()'' to send out the UDP packet to any configured IP addresses
+  * ''PyYadd.py'' then inserts the new data in the SQL server
+  * Any addressed & listening UDP clients receive the UDP packets and append them to a log file
 <code python>
@@ Line 30: / Line 43: @@
 #!/usr/bin/env python
+#
+# udp_logger.py
+#
 import SocketServer
@@ Line 121: / Line 137: @@
 </code>
-   * This creates a ''gzipped'' log file in my Dropbox - for safety - of each day's new DSC messages
+   * This creates a ''gzipped'' log file in my Dropbox of each day's new DSC messages
 === Starting the UDP Listener at boot-up ===
@@ Line 128: / Line 144: @@
 <code bash>
+#
+# CRONTAB ENTRY
+#
 @reboot python /home/gm4slv/bin/udp_logger.py &
@@ Line 134: / Line 153: @@
 --- //John Pumford-Green 19/04/24 09:31 BST//
+Last updated : ~~LASTMOD~~
 ===== Further Information =====
+[[https://www.yaddnet.org/index.php | YaDDNet]]
-{{tag>}}
+{{tag>radio yaddnet}}