• Micro course lesson 18 slow query log


    https://v.youku.com/v_show/id… Today is the last lesson of the micro course “dble fast start”: slow query log. Our dble slow query log is compatible with these two tools: Mysqldumpslow of MySQL Query congest Let’s look at a simple demonstration of slow logging: https://v.youku.com/v_show/id… We check whether the slow query log function is enabled or not through […]

  • How Java marks ppt presentations as final


    preface In the daily operation of PPT, when we finish editing and do not want to make any other changes to the document, we can mark the presentation as final. This article will introduce how to mark the final status of the presentation through Java program. Use tool: Free Spire.Presentation for Java Test environment: Intellij […]

  • Micro course lesson 10 Er table implementation method 2


    https://v.youku.com/v_show/id… In the last issue, we introduced the first implementation method of Er table, and the second method actually does not need to configure child_ Table can also implement Er table. As shown in the figure, there are six tables tablea-f. For these tables, I set up split columns, distributed nodes and split algorithm. If […]

  • Micro course | Lesson 11: introduction and demonstration of hint


    https://v.youku.com/v_show/id… In previous installments, we introduced global table and ER table. In addition, dble also provides hint to specify routing. What is hunt Let’s first introduce hint. Hint is an effective annotation, which specifies a sub library for business applications. The middleware can issue SQL in a specified way. Basically, there is a route result […]

  • Micro course lesson 14 introduction to management


    https://v.youku.com/v_show/id…  In the last episode, we demonstrated the global sequence, and then we introduced our management side. Introduction to management The management side of dble is the 9066 port of a lot of management commands just made, including the create databases command. It is said that the management side actually undertakes the two responsibilities of […]