if MySQL is a few questions about master-slave synchronization 1) can one slave synchronize data from multiple master, or can one slave only work for one master and one master for multiple slave 2) must their database names be the same for master and...
I know that mysql master and slave have been configured, but I don t know what to do if one of them dies: 1. If there is only one master and one slave, do you want to upgrade the master manually in case the master dies? (it seems that you can t call...
according to the book, this error will be reported all the time, which probably means that this error can only be used in the same thread, right? Do you want to use creat_scoped_session? please give me some advice. Thank you! sqlalchemy.exc.Programm...
react and vue have their own advantages react biosphere big vue is easy to learn I don t know how to persuade the leader to choose vue or react when you do the technical selection of the project. ...
background: I want to add tagging capabilities for our products. A product can have multiple tags, and each tag can be used by multiple products, which is the so-called many-to-many relationship. specific: We have 10 million products Product, admi...
1: after the page login is redirected, the user switches routes, how to ensure that he does not have to log in every time? 2: the user enters a routing link at will for the first time, how to judge that he has not logged in yet, and needs to log in. ...
problem description the main reason is that in order to control the size of the placeholder, I added the class name to the img tag and deleted the class name after the picture was loaded, but there was a position: absolute location in the class name. ...