答:标记事务是指 DBA 定期在所有日志中的同一位置放置标记。此操作结合使表格恢复事务标记的能力,允许您将所有数据库恢复到同一点。执行此操作非常痛苦,因为您必须恢复涉及到的所有数据库,还将丢失所有数据库中的数据,因此您必须确保不丢失日志文件,以避免发生问题。标记事务是特定于 SQL Server 的,因此如果您的分布式事务包括非 SQ
問:「標示的交易」究竟是什麼?若一個資料庫是 SQL Server,另一個是 Oracle,這樣是否還能使用標示的交易? 答:交易的標示是 DBA 定期的工作,就是在所有記錄的相同位置放入標記。這項動作只要結合還原資料表至交易標記的能力,即可讓您將所有資料庫還原至同一時間點。這樣的作法十分痛苦,因為您必須還原所有相關資料庫...
Error msg: (Microsoft SQL Server, Error 1412): The remote copy of database has not been rolled forwarded to a point in time that is encompassed in the local copy of the transactional log. Solution 3, 4, 5: We got the above mentioned error when we start the synchronization for database...
译者注:我很怀疑可变extent能起到的效果,因为大部分用户添加数据文件时,一般会指定数据文件的大小,假如AU_SIZE设置成1M,那么只有大于20G的数据文件才会有一些extent的大小为4MB,而就我接触到的DBA来说,可能大部分DBA都会把数据文件的大小设置成20G左右。还有就是虽然Oracle中有bigfile表空间,但是用的人并不多。 AS...
SQL Server database mirroring can be set to provide high availability or disaster recovery. Depending on the needs, a DBA can choose among three available modes High safety – Data is written and committed on the principal and mirror databases synchronously. Only after committing on both databases...
First, we must connect to the principal SQL Server. To do that, launch SSMS and connect to theSQL02node. In the SQL Server Management Studio, you can see on the principal server, the DBA database is in the synchronized state. See the following image: ...
when allocating a new page, SQL Server obtains an X lock on the new page. SQL Server will put the hobt_id (Heap or B-Tree ID) to which the new page belongs in the lock request. However, SQL Server cannot...
SQL Server DBA www.universql.com Friday, November 13, 2009 12:15 AM I am currently having the same issue about database mirror on sql 2005 as i remember was installed on the domain admins account & that login is used in the same instance of both servers. i try grant the admin acco...
That made me think of SPNs. Every AG listener in SQL needs to have an SPN defined, usually SQL will register the SPNs itself but in this case the service account wasn’t able to. Manually creating an SPN for the listeners sorte...
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability We walk in the dark places no others will enter We stand on the bridge and no one may pass It also won't verify that the backup's usable, unless the backup was taken with the CHECKSUM option. ...