Interesting that they changed it. Looks like they changed it from 9i. Good to know. Probably better they did. Jim -----Original Message----- From: Niall Litchfield [mailto:niall.litchfield@xxxxxxxxx] Sent: Thu 10/20/2005 3:29 AM To: Kennedy, Jim Cc: cmarquez@xxxxxxxxxxxxxxxx; Yavor_Ivanov@xxxxxxxx; Oracle Mailing List; oracle.tutorials@xxxxxxxxx Subject: Re: DATAFILE?? On 10/18/05, oracle-l-bounce@xxxxxxxxxxxxx <oracle-l-bounce@xxxxxxxxxxxxx> wrote: > > The best way to find out is to try it. You will probably find that it > depends. If you use a LMT and do uniform extents then it will do it by > concatenation. (fill up the first file then move on to the 2nd etc.). > If you create an LMT and do automatic extents then it is different. It > does it by striping. The first extent goes in the first file, the 2nd > in the 2nd file... > > You can see this by setting up a small test. > Jim Unfortunately, if you run the test you'll find that your assertion isn't correct on 10gR1 :) 1 create tablespace demo 2 datafile 'c:\temp\demo01.dbf' size 10m,'c:\temp\demo02.dbf' size 10m 3* extent management local uniform size 128k USER @ orcl>/ Tablespace created. USER @ orcl>create table t1(c1 number); create table t1(c1 number) * ERROR at line 1: ORA-00955: name is already used by an existing object USER @ orcl>create table demo(c1 number); Table created. USER @ orcl>drop table demo; Table dropped. USER @ orcl>create table demo(c1 number) 2 tablespace demo; Table created. USER @ orcl>alter table demo allocate extent; Table altered. USER @ orcl>alter table demo allocate extent; Table altered. USER @ orcl>alter table demo allocate extent; Table altered. USER @ orcl>alter table demo allocate extent; Table altered. USER @ orcl>alter table demo allocate extent; Table altered. USER@ orcl>alter table demo allocate extent; Table altered. USER @ orcl>select file_id,count(*) 2 from dba_extents 3 where segment_name='DEMO' 4 group by file_id; FILE_ID COUNT(*) ---------- ---------- 9 4 10 3 2 rows selected. -- Niall Litchfield Oracle DBA http://www.niall.litchfield.dial.pipex.com