Oracle 利用管道压缩逻辑备份

熟悉利用管道压缩逻辑备份的大致过程：
1、创建命名管道
[ora10g@mcprod tmp]$ mknod /tmp/exp.pipe p

2、调用gzip压缩程序对输进管道信息进行压缩，并在后台执行
[ora10g@mcprod tmp]$ gzip <exp.pipe> drb.exp.gz &
[1] 19643
[ora10g@mcprod tmp]$ ps -ef|grep 19643
ora10g   19643 17608  0 07:17 pts/3    00:00:00 -bash
ora10g   20175 17608  0 07:17 pts/3    00:00:00 grep 19643

3、进行逻辑备份
[ora10g@mcprod tmp]$ exp drb/drbmc owner=drb file=/tmp/exp.pipe

Export: Release 10.2.0.3.0 - Production on Fri Dec 11 07:18:13 2009

Copyright (c) 1982, 2005, Oracle.  All rights reserved.


Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Production
With the Partitioning, OLAP and Data Mining options
Export done in US7ASCII character set and AL16UTF16 NCHAR character set
server uses ZHS16GBK character set (possible charset conversion)
. exporting pre-schema procedural objects and actions
. exporting foreign function library names for user DRB
. exporting PUBLIC type synonyms
. exporting private type synonyms
. exporting object type definitions for user DRB
About to export DRB's objects ...
. exporting database links
. exporting sequence numbers
. exporting cluster definitions
. about to export DRB's tables via Conventional Path ...
. exporting synonyms
. exporting views
. exporting stored procedures
. exporting operators
. exporting referential integrity constraints
. exporting triggers
. exporting indextypes
. exporting bitmap, functional and extensible indexes
. exporting posttables actions
. exporting materialized views
. exporting snapshot logs
. exporting job queues
. exporting refresh groups and children
. exporting dimensions
. exporting post-schema procedural objects and actions
. exporting statistics
Export terminated successfully without warnings.
[1]+  Done                    gzip <exp.pipe >drb.exp.gz

4、生成压缩好的exp文件：drb.exp.gz
[ora10g@mcprod tmp]$ ls -rlt drb.exp.gz
-rw-r--r-- 1 ora10g oinstall      870 Dec 11 07:18 drb.exp.gz

5、对*.gz进行解压
[ora10g@mcprod tmp]$ gunzip drb.exp.gz
[ora10g@mcprod tmp]$  ls -rtl drb.exp
-rw-r--r-- 1 ora10g oinstall 16384 Dec 11 07:18 drb.exp