sql server alwayson requirements

after the application side performance is good; we know that in synchronous mode, Since the application side waits for the synchronization secondary node to complete the log cure (Harden) to receive the commit or rollback information, the network environment between the two nodes and the disk IO capability become the key of the above impact; Prior to this, we have optimized the network (see: SQL Server 201

Label:Build SQL Server AlwaysOn second (configure failover cluster) starting from 0First articleHttp://www.cnblogs.com/lyhabc/p/4678330.html Second articleHttp://www.cnblogs.com/lyhabc/p/4682028.html This second article, starting from 0, builds SQL Server

three nodes were DB03. Three nodes: When the DB01 node is unreachable, the DB02 node becomes the primary node to act as a read-write copy, and the DB03 node acts as a read replica. Two nodes: When the DB01 node is unreachable, the DB02 node becomes the primary node, which acts as a read-write copy and also acts as a reading replica. When the DB01 service is stopped, the quorum is automatically switched to DB02, and both read-write and read-only connections are connected to the DB02. There's no

Label: SQL Server AlwaysOn technology relies on the Windows WSFC feature, the Failover Clustering feature. Both Liunx corosync+pacemaker and Oracle Grid Infrastructure need to complete the control of cluster resources and resource isolation. WSFC transfers and isolates the resources associated with SQL

Microsoft has introduced many highly available technologies for SQL Server, such as early replication, later log shipping, database mirroring, SQL Server clustering, and so on. In SQL Server 2012 There is also a killer, and Oracle

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Tags: eee Create server Add introduction c51 AAC status codeSQL Server Failover +alwayson Add database to availability GroupThe configuration of SQL Server Failover +alwayson has been described in detail in the previous articles,

This article is based on the previous "SQL Server 2012 alwayson--specified data synchronization link, eliminate network jitter caused by the submission delay problem" problem continue to optimize, the specific background please refer to the above; After one months of tossing and turning, the hard-to-chew bone has finally been fixed. The problem is only the

3 pieces in front of us. The full configuration of SQL Server Failover cluster+ AlwaysOn is described, and today we'll show you how to add multiple client access points to AlwaysOn, in general, There is only one single availability group listener (Listener) per availability group, but in some extreme cases multiple lis

Personal experience of a project, the boss suddenly proposed that the database of the debt to implement a diversion, a database one responsible for reading, and the other responsible for writing, background is required to synchronize the state of two databases. Find a lot of information, found that the new version of AlwaysOn can achieve this feature.Having studied the extensive data of AlwaysOn, he found t

Tags: Database sql ServerPlanning: 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 2 Sql01 192.168.0.101255.255.255.0192.168.0.254dns:192.168.0.100

copy ') Note: Determine whether the primary replica command and determine whether the backup primary replica command is different, if the specified database is a non-availability group database to determine whether the primary replica returned the result is null, and whether the backup primary replica returned is 1. Summary 1. The RESTORE statement is not allowed on the primary or secondary database of the availability group. 2. The backup preference is just a decision option for a backup, rega

Label:SQL Server error log (AG)The SQL Server error log records the time that affects AG, such as:1. Interacting with Windows failover clusters2. Status of available replicas3. Status of available dataStatus of the 4.AG endpointStatus of the 5.AG listenerLease status for 6.SQL serv