spool 管道 小文件 mknod

Spool File In SQL*PLUS in Multiple Small Files ? (Doc ID 2152654.1)

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In this Document Goal Solution APPLIES TO: Oracle Database - Enterprise Edition - Version 10.2.0.1 to 12.1.0.2 [Release 10.2 to 12.1] Oracle Database Cloud Schema Service - Version N/A and later Oracle Database Exadata Cloud Machine - Version N/A and later Oracle Cloud Infrastructure - Database Service - Version N/A and later Oracle Database Backup Service - Version N/A and later Information in this document applies to any platform. GOAL We have an Unix environment with file size limitation (2GB), and we have a routine shell script that generates a large spool file. We would like to know if it´s possible to split this big spool file in many small files of 2GB max size during the generating of spool file.   SOLUTION There is no option to limit size in spool command as below: SQL> help spool SPOOL ----- Stores query results in a file, or optionally sends the file to a printer. SPO[OL] [file_name[.ext] [CRE[ATE] | REP[LACE] | APP[END]] | OFF | OUT] However you can use below Unix Split and mknod command to split the spool file. cd /tmp rm spool.txt mknod spool.txt p split -b2000m </tmp/spool.txt & sqlplus / as sysdba SQL> spool tmp/spool.txt OR SQL>@<any script>.sql #put the spool file path as /tmp/spool.txt You will get multiple spool files with maxsize 2000m and name as xaa xab xac xad and so on at /tmp location. SQL> ! [xxx]/grdbms/home> cd /tmp [xxx]/tmp> ls -ltr x* prw-r--r-- 1 grdbms grdbms 0 Jun 24 18:48 spool.txt -rw-r--r-- 1 grdbms grdbms 1003249664 Jun 24 18:48 xaa