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MySQL table sharding auto-incremental ID Solution After we perform the table sharding operation on MySQL, we cannot rely on the automatic increment of MySQL to generate a unique ID, because the data has been distributed to multiple tables. Avoid using an auto-increment IP address as the primary key as much as possible, which will cause great inconvenience to the database table sharding operation. Sequence i

"PHP" MySQL Global ID Generation scheme, PHPMYSQL global ID Production system with the growth of business will always go through a business volume from small to large process, scalability is considered a database system high availability of an important indicator; When the single table/database data volume is too large and the amount of updates is rising, MySQL DBAs tend to propose sharding solutions to th

The ID card number is divided into two, the old one is 15 digits, the new one is 18 digits. ID Card 15-bit encoding rule: dddddd yymmdd xx P dddddd: Region code YYMMDD: Date of birth XX: Sequence class code, cannot determine p: sex, odd for male, even for female; ID 18-bit encoding rule: dddddd yy YYMMDD XXX dddddd: Area code yyyymmdd: birth date XXX: Sequence cl

noun explanation Package properties: In the Androidmanifest.xml file. Package Name: The application's bundle name. Application ID: The ApplicationID property under the module Defaultconfig block. Set Application IDEach Android application has a unique application ID like the Java package name, such as Com.example.myapp. On Android devices and Google Store, the application

Source: As long as the microcontroller has a true unique ID, you can make encryption indestructibleHttp://www.amobbs.com/thread-5518980-1-1.htmlFirst ring:ID-->F1 (ID)---"IDX,The ID is converted to an integer idx by a custom algorithm F1, F1 is an irreversible operation and cannot be easily analyzed, which is actually easy to implement.Then, save the IDX to the E

The Windows Store application obtains the device ID in several ways. This article is a personal blog backup article, the original address: Http://validvoid.net/solutions-get-device-id-for-uwp/ Generating unique device IDs for data statistics is a very common requirement in application development. However, since WP 7.8, it is impossible to obtain a unique and unchanged one on the WP platform, the device IDs

Production system with the business growth will always experience a business volume from small to large process, scalability is to consider the high availability of database system is an important indicator; in Tanku/database data volume is too large, updates are constantly soaring, MySQL DBA often to the business system to put forward sharding solution. Since to sharding, it is inevitable to discuss the sharding key problem, in some business systems, must ensure that sharding key globally uniqu

The synchronized data of MySQL contains the server-id, which is used to identify the server from which the statement was originally written. Therefore, the server-id must have The synchronized data of MySQL contains the server-id, which is used to identify the server from which the statement was originally written. Therefore, the server-

Working early in the morning, I found this serious problem very depressing. Detailed Exception: The Database ID 30, Page (1:1141), slot 71 for LOB data type node does not exist. This is usually caused by transactions that can read uncommitted data on a data page. Run DBCC CHECKTABLE. After searching a lot of articles, I finally got it done. The method is as follows: DBCC checkdb('eshoubao') The result is as follows: DBCC results for 'eshoubao'.DBCC r

How PHP generates a unique numeric ID, note that it is numeric, do not string the Reply content: How PHP generates a unique numeric ID, note that it is numeric, do not string the Landlord, you are a big problem. Twitter,weibo and so on have been specially made a number device to solve this problem.The thing about Twitter, called Snowflake, has already been pointed out upstairs. This thing altogether

OverviewIn distributed systems, there are scenarios that require the use of a globally unique ID, which can be used to prevent ID collisions using a 36-bit UUID, but the UUID has some drawbacks, first he is relatively long, and the UUID is generally unordered.There are times when we want to use a simple ID and want the ID