SQLSERVER备份数据库的时候copy only选项的意思
SQLSERVER 备份 数据库 的 时候 copy only 选项 的 意思 仅复制 备份 WITH copy_only 进行 备份 通常都会更改 数据库 ,而这又会影响其他 备份 和还原这些 备份 的方式。不过,有时为了特殊目的, 必须执行不影响 数据库 的整体 备份 和还原过程的 备份 。
SQLSERVER备份数据库的时候copy only选项的意思
仅复制备份 WITH copy_only
进行备份通常都会更改数据库,而这又会影响其他备份和还原这些备份的方式。不过,有时为了特殊目的,
必须执行不影响数据库的整体备份和还原过程的备份。
完整备份一般用作在其之后执行的一次或多次差异备份的基准备份。SQL2005支持创建仅复制备份,这并不影响正常的备份序列。
所以,与其他备份不同,仅复制备份不会影响数据库的整体备份和还原过程
可以为任何类型的备份创建仅复制备份
(1)仅复制完整备份(所有恢复模式)
若要创建仅复制完整备份或差异备份,请在backup database语句中使用copy only选项。
使用copy only选项执行的数据备份不能用作基准备份,并且不影响任何现有差异备份与定期完整备份或差异备份相反,
仅复制备份不会截断事务日志
(2)仅复制差异备份
这些备份与通常的差异备份相同
注意:copy_only备份在备份集表的is_copy_only列中记录。仅复制备份只能通过使用backup语句来创建。
SSMS不支持仅复制备份即GUI备份不支持copy only选项
使用下面SQL语句来看到SQLSERVER自从安装以来执行过的数据库备份操作
<span>1</span> <span>USE</span> <span>[</span><span>msdb</span><span>]</span> <span>2</span> <span>GO</span> <span>3</span> <span>SELECT</span> <span>[</span><span>backup_set_id</span><span>]</span>, <span>[</span><span>backup_finish_date</span><span>]</span>, <span>[</span><span>database_name</span><span>]</span>, <span>[</span><span>first_lsn</span><span>]</span><span>, </span><span>4</span> last_lsn, <span>[</span><span>checkpoint_lsn</span><span>]</span>, <span>[</span><span>is_copy_only</span><span>]</span> <span>5</span> <span>FROM</span> <span>[</span><span>dbo</span><span>]</span>.<span>[</span><span>backupset</span><span>]</span> <span>6</span> <span>ORDER</span> <span>BY</span> <span>[</span><span>backup_finish_date</span><span>]</span>
比如我执行下面的SQL语句,那么在备份集那里是看不到你的备份的,我说的是GUI界面
<span>1</span> <span>Backup</span> <span>DATABASE</span> GPOSDB <span>To</span> <span>disk</span><span>=</span><span>'</span><span>D:\GPOSDB_backup_201306072215.bak</span><span>'</span> <span>WITH</span> copy_only

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