/*! JSZip - A Javascript class for generating and reading zip files<http://stuartk.com/jszip> (c) 2009-2014 Stuart Knightley <stuart [at] stuartk.com>Dual licenced under the MIT license or GPLv3. See https://raw.github.com/Stuk/jszip/master/LI…
背景:最近采购了一批新的服务器,底层的存储设备的默认physical sector size从原有的 512B 改为了 4K. 装完系统以后,在做数据库物理备份恢复时xtrabackup报了这么一个错.但是同样的备份在512B sector size的老系统上却可以恢复. 报错如下: InnoDB: Error: tried to read 2048 bytes at offset 0 0.InnoDB: Was only able to read 0.140304 18:48:12 Inno…
One danger in making online backups is the possibility of inconsistent data within a block. For example, assume that you are backing up block 100 in datafile users.dbf. Also, assume that the copy utility reads the entire block while DBWR is in the mi…
Basic Concepts of Block Media Recovery Whenever block corruption has been automatically detected, you can perform block media recovery manually with the RECOVER ... BLOCK command. By default, RMAN first searches for good blocks in the real-time query…
The database can use table compression to eliminate duplicate values in a data block. This section describes the format of data blocks that use compression. The format of a data block that uses basic and advanced row compression is essentially the sa…