What is the reason for the service crash caused by replacing the easycvr cluster version with the old database?

EasyCVR The clustering function of the platform has been released for some time , The efficient collaboration feature of the cluster has prompted many users to deploy the cluster version . But when deploying a cluster , Because there are many devices and data in the platform database before the user , So many users will directly replace the database to achieve the purpose of transferring data .

We also encountered the same requirements during the testing phase of the cluster function , To avoid adding devices and users , We will use the cluster function EasyCVR Move the database to the new version . You can log in to the platform at the beginning , But after running for a period of time , There will be no response when clicking on the page , Refresh the page and it will go round all the time , Until the prompt that you can't access this website appears .

Check the process , Find out EasyCVR Process closed . After trying several times, the problem is still the same .

Later, by analyzing the version function , Think of all the different table structures between the old and new databases , So the full cluster version was redeployed , After adding a device , Compare the old and new databases , Find out Device The table structure of this table is different , There are more table structures in the new table server_id Field of .

new Device surface ：

used Device surface :

And then , Manually added devices in the full cluster version , There has never been a crash .

From this we come to the conclusion that ： After using the new cluster version , It is not allowed to replace the previous database , Device needs to be added again .

If a user encounters similar problems during deployment , Refer to our above troubleshooting methods for troubleshooting and solution , If you encounter problems that cannot be solved , You can also contact us for assistance .

About cluster deployment and operation configuration , We have shared a lot with you in our previous articles , Interested users can read our previous articles to understand .EasyCVR Support massive video aggregation management , It can provide live video surveillance 、 Cloud video 、 Cloud storage 、 Video retrieval and review 、 Intelligent alarm 、 Platform cascading 、 Intelligent analysis and other video services .

The platform supports the equipment to pass the national standard GB28181、RTMP、RTSP/Onvif、 The sea, SDK、 Dahua SDK、Ehome Wait for protocol access , External distribution RTSP、RTMP、FLV、HLS、WebRTC Video streams of the same format . Interested users can go to the demonstration platform for experience or deployment testing .