to create an availability group with automatic seeding1. Create an EndpointEach replica requires a mirroring endpoint for communication, and the default TCP port is 5022.CREATE ENDPOINT [Hadr_endpoint]state=startedas TCP (Listener_port = 5023,
comparison and analysis of performance testsTake XX library to do the test, data file 8G, after backup for 600M:
Test scenario
Use time
1
Create by Backup restore, turn on backup compression
1
SummarizeFor our production environment to use automatic seed setting considerations:
Because SQL Server 2016 and 2017 behave differently in disk file path requirements, 2017 can have data files deployed on different volumes on the primary and
In your database setup interface, there is a test connection button to check:
Confluence can connect to your database server
The database character set and isolation level are correct
Your database user has the correct database
Always get the current inserted ID at the time of writing the stored procedure with @ @IDENTITYBut today when using @ @IDENTITY is involved in the current data insertion will have an INSERT trigger occurs, found with the actual inserted ID value is
The transaction is about atomicity. The concept of atomicity means that some things can be viewed as an inseparable unit. From a database point of view, it refers to the smallest combination of one or more statements that should be executed all or
Two SQL Servers configure iSCSI virtual disksIn the previous article we used iSCSI target software to create three iSCSI virtual disks on Dc-iscsci, below we will show you how Sql-cl01 (HSR1 50) and Sql-cl02 (HSR2 51) Access these iSCSI virtual
Planning: 3 Virtual Machines: 1 for domain control (DC) and 2 for SQL Server installation
Serial number
Name
Tcp/ipv4
Note
1
Sqldc
192.168.0.100255.255.255.0192.168.0.254dns:127.0.0.1
DC
First, what is database mirroringHigh-availability solutions for basic softwareFast Failover Recovery (3 second transfer), low hardware costDatabase-level-based implementationsSecond, server roles in database mirroringPrincipal serverHosting the
The same functionality can be achieved with SQL Server Agent-based tasks. However, in practice, the SQL Server Agent service is always unable to start, because it is not the home server, so find another way.The batch code is as follows:1 - 127.0. 0.1
* If you are creating a database of your own then you should choose the collation from the beginning:chinese_prc_ci_as1. Change the collation method: Right click Gen built database, properties → options → sort rule selected: chinese_prc_ci_as
1. Data filesThe master data file *.mdf has only oneSecondary data files *.ndf have 0-nLog file *.ldf must have one or more 2. Data integrityEnsuring the integrity of the data is a constraint on the integrity of the data. Reliable + precise.(1)
Tag: SQL Server CTO self-increment title NotepadOne, SQL Server table data copied to Excel1, new query, with SQL statements to read out the table data2, then, select the data, right-click, copy (also can be clicked together with the title copy),
Do not has slave connection to use, use master connection insteadIt's weird, it's all configured according to configuration.A little skeptical of life, isn't it? Official website documentation Sometimes we have to challenge it.Try to get the
django--connecting to a SQL Server database
* Please note that I am using python3.5 and Django2.0.4SQL Server is a closed-source, Microsoft-sourced relational database that runs on Windows and Linux platforms. Because of its closed-source
The computed column differs from the column that requires us to assign the value manually or by the program, whose value is derived from the computed value of the other columns in the table. For example, if a table contains a quantity column number
SQL ServerFull Recovery ModelTo recover the deleted tables by mistake,PrecisionRecovery1. Find the deleted table name (no schema, can find the schema sharing), object_id, table database, delete people, delete time, etc.declare @database_name
To stop automatic seeding of a secondary replica on an existing availability groupExecutes on the primary replicaALTER availability GROUP []modify REPLICA on ' ' with (seeding_ MODE = MANUAL) GOThe script above cancels a secondary replica that is
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