SQL Server 2005 Database Mirroring Limitations and Gotchas
I have been working pretty extensively with SQL Server Mirroring in Microsoft SQL Server 2005. It seems to work pretty effectively, though setup outside a domain configuration is convoluted to say the least.
I have posted in the past about some problems I have had setting it up. My difficulties with the configuration aspect actually generated KB940254. The writeup for this particular KB seems kind of convoluted but the long and short of it is that you must use the actual machine name and not arbitrary DNS or Host file entries for mirroring configuration.
SQL Sever 2005 Mirroring Gotcha - Expiring Certificates
Well as we have plugged away with more of our clients using SQL Server Mirroring we have approached 2 more interesting issues. The first one is that, by default, when using SQL Server mirroring with certificates for authentication and encryption, SQL server certificates will expire after one year.
After your certificates expire SQL Server Mirroring will fail, rather ungracefully, if either the principal or mirror instance fails for any reason. And, if the server that fails happens to be the principal instance, your whole mirror instance dies and all your mirror databases go offline, the mirror does not recover even if you have configured a witness. Ef ...
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I have posted in the past about some problems I have had setting it up. My difficulties with the configuration aspect actually generated KB940254. The writeup for this particular KB seems kind of convoluted but the long and short of it is that you must use the actual machine name and not arbitrary DNS or Host file entries for mirroring configuration.
SQL Sever 2005 Mirroring Gotcha - Expiring Certificates
Well as we have plugged away with more of our clients using SQL Server Mirroring we have approached 2 more interesting issues. The first one is that, by default, when using SQL Server mirroring with certificates for authentication and encryption, SQL server certificates will expire after one year.After your certificates expire SQL Server Mirroring will fail, rather ungracefully, if either the principal or mirror instance fails for any reason. And, if the server that fails happens to be the principal instance, your whole mirror instance dies and all your mirror databases go offline, the mirror does not recover even if you have configured a witness. Ef ...
Read More...
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Recently I was tasked with synchronizing directories between two different servers. Because files can change, become corrupted or otherwise altered without changing any of their attributes, it was pretty essential to ensure that these files were exactly the same.