Furthermore, the size of the SEND queue indicates the amount of data loss that will occur if the principal database suffers a disaster. These two will help you know how much behind principal is from mirror server. Read this. Alternatively you can failover principal to mirror but make sure before failover that mirror is fully synchronized with principal to avoid any data loss. IMO failover is best way here to determine and prove that changes are actually getting reflected if you need to show for some audit purpose with screenshots.
Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Learn more. Sign in. United States English. Ask a question. Quick access. Search related threads. This mode is the least sensitive to the network environment and provides the best configuration for exploring how mirroring works.
We recommend that you run your system asynchronously until you are confident that your bandwidth supports mirroring and you have developed an understanding of mirroring setup and of the performance of asynchronous mode in your environment.
For more information, see Database Mirroring Operating Modes. Throughout testing, we recommend that you monitor your sessions for network errors that cause database mirroring to fail.
For more information about potential sources of failure, see Possible Failures During Database Mirroring. When you are confident that asynchronous operation is meeting the business needs, you might want to try synchronous operation to improve your data protection. When you test how synchronous mirroring works in your environment, we recommend that first you test high-safety mode without automatic failover.
The primary purpose of this testing is to see how synchronous operation affects the database performance. Wait to enable automatic failover until you are confident that high-safety mode without automatic failover is meeting the business needs and that network errors are not causing failures. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Please rate your experience Yes No.
Any additional feedback? Note You can upgrade server instances that are partners in a mirroring session to a more recent version of SQL Server. The witness controls the automatic failover to the mirror if the principle becomes unavailable.
Other than this what are the other limitations? One thing to note is that Standard doesn't support database snapshots, so you can't create a snapshot of your mirror for querying purposes. You must be logged in to reply to this topic. Login to reply.
0コメント