rommon 1 > tftpdnld IP_ADDRESS: 192.168.55.199 IP_SUBNET_MASK: 255.255.255.0 DEFAULT_GATEWAY: 192.168.55.1 TFTP_SERVER: 192.168.55.105 TFTP_FILE: c2600-j1s3-mz.123-18.bin Invoke this command for disaster recovery only. WARNING: all existing data in all partitions on flash will be lost! Do you wish to continue? y/n: [n]: y 本文来自China...

Description\r\n- The ABCs of Win2K recovery and Repair\r\n- http://support.microsoft.com/kb/229716 => Description of the Windows 2000 recovery Console\r\n- http://support.microsoft.com/kb/314058 => Description of the Windows XP recovery Console\r\n\r\n Usage Limitations\r\n- http://support.microsoft.com/kb/229077 => Mirroring Prevents Pre-Installing the recovery Console\r\n- http://support.micros...

SQL文 begin; update tab set name = 'test' where id = '1' ; .... .... update tab set name = 'test10000000' where id = '10000000' ; pg_sleep(300); end; 问题： 1.为什么commit很快就完成了，我想让它时间长点？ 2.如果commit时间长，在数据写入磁盘没有全部之前（假设只要1万条成功），突然发生系统崩溃（crash），通过wal日志重做, 表tab的1千万数据能全部都更新吗？

vmware esxi5环境搭建如下： 1.主机: windows7 64bit,4G ram,ip:192.168.1.102 2.vmware 8.0上安装vmware esxi 5,ip:192.168.17.129,2G ram 3.vmware 8.0上安装windows 2008 datacenter ,ip:192.168.17.136,2G ram,其上安装vcenter server 4.vmware esxi5上安装vmware data recovery 和msdos6.22,vmware daa recovery ip:192.168.17.137,2G ram 偿试了两种方法： 1.备份目标介质网格映射，也是可以备份不能还原，还原时报...

1. 什么是备份和恢复
In general, backup and recovery refers to the various strategies and procedures involved in protecting your database against data loss and reconstructing the database after any kind of data loss.