Number of data files per database!

Hello,
http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/limits002.htm#i287915
reads
>>
Database files
Maximum per tablespace Operating system dependent; usually 1022
Maximum per database 65533
May be less on some operating systems
Limited also by size of database blocks and by the DB_FILES initialization parameter for a particular instance
>>
I understand the DB_FILES part but how come number of files per database be limited by the database block size?
The maximum number of datafiles per database is 65533 as per above quote.
Could someone please explain this?
Regards,

Niten
See the below link
URGENT! - Data Packet Size
Assign points if has really helped you.
Regs
Gopi

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Change number of data file

I need to copy the data files to a SAN and want to change the number of data files form 4 to 1. This is only a small database (22Gb). I don't know how to delete the data files and re create them.
Regards
Hans

Hi Hans,
no, you can also do it using DBMGUI. The process is really the same as when you're doing a homogenous system copy, the only difference is the target itself is the same db instance.
You'd have to make sure you've backup up all (data+log) and no further data was created (for example by making a full data backup in ADMIN mode and saving the log). Then you'd need to initialize the DB and specify the desired number of (data) volumes and make sure you select the radio button labelled 'Create instance for recovery' during the initialization process, so the instance will only be put into ADMIN, after which you can then recover (using the backups made in the beginning).
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How to increase number of data files parameter

Dear All,
I am facing problem in increasing number of data files associated with the DB. I have DB_FILES = 200 and want to set it to 300. DB was started with SPFILE.
Tell me how to increase this parameter. I dont want to stop DB also. I will be thankful if anyone guide me in both ways to stop DB and without stopping it.
Regards
Aqeel Nawaz

Madrid,
Please don't take it as nit-picking.Just wanted to point an enhancement in 10g regarding recreating control file for increasing number of datafiles.I am sure you must be aware about it.
Please see this link and this note,
http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/dfiles.htm#sthref1340
When you issue CREATE DATABASE or CREATE CONTROLFILE statements, the MAXDATAFILES parameter specifies an initial size of the datafile portion of the control file. However, if you attempt to add a new file whose number is greater than MAXDATAFILES, but less than or equal to DB_FILES, the control file will expand automatically so that the datafiles section can accommodate more files.
From 10g onwards,the requirement to recreate teh control file is lifted.
Please correct me if I interpreted the note in a wrong way.
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Aman....

The maximum number of data files that can be accessed on the ORACLE DB is r

Hello Gurus,
We are facing problem in our BW production server
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O/S - AIX - 5.3
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check Data transfer from one BW system to another
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Hi Experts
                           In my scenario i need to upload a directory with n number of excel file from my presentation server to application server . Please do help on that (note : directory with many file not an single file )

Hi,
Here is the Code for List of Files from the Specific Directory to Application Server(SAP)..
REPORT ZDIRFILES    .
PARAMETER: p_fdir            type pfeflnamel DEFAULT '/usr/sap/tmp'.
data: begin of it_filedir occurs 10.
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data: end of it_filedir.
*START-OF-SELECTION
START-OF-SELECTION.
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call function 'RZL_READ_DIR_LOCAL'
       exporting
            name     = p_fdir
       tables
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List of files are contained within table it_filedir
loop at it_filedir.
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Number of data records per logical unit of works (LUW)

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See the below link
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Assign points if has really helped you.
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Powershell commnd to count the number of mailboxes per database in Exchange 2010

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Regards
Krishna S

try this one:
Get-MailboxServer|foreach{Get-MailboxDatabase-status|selectserver,name,backupinprogress,lastfullbackup,@{n="Mailboxes";e={$_.count}},@{N="DatabaseSize
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|ft

Distributing the data files

Hi All,
We are working on the redistribution process of data files in SQL level. We knew that by doing the empty files options through shrink we could achieve it. But I would like to know, Is there any things which I need to consider in terms of number of data files(Any Formula to arrive a total number of data files for the better performance in SQL database level).
In my environment, the current database size is 420GB and its running with 24 data files, SAP advised us to minimize the data files because the data files are not in order (Like 1 data file having GB and some having 40GB and few having 90GB) - So, SAP recommended us to maintain the data file size as common and distribute the data equally among the files.
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Database size :420GB
Database version : SQL 2005
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Vijay

Hi,
But I would like to know, Is there any things which I need to consider
in terms of number of data files (Any Formula to arrive a total number of data files
for the better performance in SQL database level).
You can refer Topic "Number and Size of SQL Server Data Files" of this [Best Practice document|http://www.sdn.sap.com/irj/scn/index?rid=/library/uuid/4ab89e84-0d01-0010-cda2-82ddc3548c65&overridelayout=true] (Page no.37 to 44 ). I hope you will get all the required information ,which can be considered for File Management in SQL server.
Also you can refer the following SAP Notes to get more information.
Note 987961 - FAQ: SQL Server I/O performance
Note 363018 - File management for SQL Server
Note 1488135 - Database compression for SQL Server
Regards,
Bhavik G. Shroff

What are the data files in the Proxies folder?

In the iMovie Projects folder tree there are folders called Proxies. In that folder there is a folder called the name of the projects events folder, twice, with %20 for spaces and such. In that folder there are a large number of data files like 2010.data and such. What are these data files? In one case there are 861 of them and they take up 5.1 MB. Thanks.

betaneptune wrote:
An iMovie project is a bundle?
Yes. What appears in the Finder as a singel file is really a bundle of files.
But what are they?
I can't tell you exactly - but I'm sure there's data there that allows iMovie to undo things you've already done, references the event clips used in the movie, thumbnails, backups, transitions you've used - that kind of thing.
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Even so, I'd restrict that kind of experimentation to junk projects.
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Fair question. I wish I could tell you more.
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Message was edited by: Matthew Morgan

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Steps as follows:
===========
restore database;
recover database;
alter database open;
Please advice if the steps are wrong.
FAN

Hi user623471!
Yes you don't have to restore control, redo log and archive log files in the case that they are not lost. To find out which datafiles are lost do the following steps:
<pre>
sqlplus / as sysdba
--Make a checkpoint
ALTER SYSTEM CHECKPOINT;
--query v$recover_file to see which files need recovery
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FROM v$recover_file;
exit
</pre>
Now start rman an restore only the files shown by v$recover_file.
<pre>
rman target /
restore datafile x, y, z;
recover database;
sql 'alter database open';
exit;
</pre>
x, y and z are placeholders for the filenumbers shown by the file# column of v$recover_file.
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yours sincerely

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I'm looking for some help...probably a consultant to give us a call.
I need to know the following:
For 2.6 and 7, number of open files per process default and maximum setting.
Procedure to change the default setting to the maximum
Amont of RAM required to handle the max setting.
Risks inherent in setting this parameter to the max.
Any info on test environments where max setting has been utilized (e.g. datase TPC benchmarks, etc..)
Feel free to call 408.861.1103 - happy to pay for the advice.

Hi!
The maximum number of file descriptors per process is set by two parameters:
rlim_fd_cur (soft limit, defaults to 64)
rlim_fd_max (hard limit, defaults to 1024)
Processes may raise their soft limit up to the hard limit using setrlimit(2).
Setting rlim_fd_cur high is not a problem as the file desciptors are allocated in chunks of 24 as required, and so not all in one go. They don't actually require that much memory either.
As administrator you may set the limits by adding an entry to /etc/system, eg:
set rlim_fd_max=600
and rebooting.
Note however on 32 bit solaris, the significant limitation is that the stdio library FILE structure limits your process to 256 fds. This is increased to 65536 for 64bit programs on solaris 7.
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Hope that helps.
Ralph
SUN DTS

How to extract data from text file to database table

Hi ,
I am trying to upload data in text file to database table using GUI_UPLOAD function .what would be the program for that.
thanks in advance.

Hi,
I don't think you have a standard sap program to upload data from file to database table...
Instead you can create a custom program like this..
DATA: T_FILEDATA(1000) OCCURS 0 WITH HEADER LINE.
DATA: T_ZTABLE LIKE ZTABLE OCCURS 0 WITH HEADER LINE.
CALL FUNCTION 'GUI_UPLOAD'
EXPORTING
    filename                      = 'C:\TEST.TXT'
tables
    data_tab                      = T_FILEDATA
EXCEPTIONS
   FILE_OPEN_ERROR               = 1
   FILE_READ_ERROR               = 2
   NO_BATCH                      = 3
   GUI_REFUSE_FILETRANSFER       = 4
   INVALID_TYPE                  = 5
   NO_AUTHORITY                  = 6
   UNKNOWN_ERROR                 = 7
   BAD_DATA_FORMAT               = 8
   HEADER_NOT_ALLOWED            = 9
   SEPARATOR_NOT_ALLOWED         = 10
   HEADER_TOO_LONG               = 11
   UNKNOWN_DP_ERROR              = 12
   ACCESS_DENIED                 = 13
   DP_OUT_OF_MEMORY              = 14
   DISK_FULL                     = 15
   DP_TIMEOUT                    = 16
   OTHERS                        = 17
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
LOOP AT T_FILEDATA.
T_ZTABLE = T_FILEDATA.
APPEND T_ZTABLE.
ENDLOOP.
MODIFY ZTABLE FROM TABLE T_ZTABLE.
COMMIT WORK..
Thanks,
Naren

After renaming data file it failes during database open

Hi,
I took RMAN full back.
Then i renamed datafile then restored and recovered. It goes fine.
But during the daabase open it fails with
ORA-01113: file 6 needs media recovery
ORA-01110: data file 6: '+OBTDG1/qa112asm/datafile/users02.dbf'
Any specific reason for that?
=======================================================
Recovery Manager: Release 11.2.0.1.0 - Production on Thu Jul 22 01:19:30 2010
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
RMAN> backup database;
connected to target database: QA112ASM (DBID=3746246770)
RMAN>
Starting backup at 22-JUL-10
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=145 device type=DISK
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00001 name=+OBTDG1/qa112asm/datafile/system01.dbf
input datafile file number=00003 name=+OBTDG1/qa112asm/datafile/rbs01.dbf
input datafile file number=00002 name=+OBTDG1/qa112asm/datafile/sysaux01.dbf
input datafile file number=00004 name=+OBTDG1/qa112asm/datafile/temp01.dbf
input datafile file number=00005 name=+OBTDG1/qa112asm/datafile/tools01.dbf
input datafile file number=00006 name=+OBTDG1/qa112asm/datafile/users01.dbf
input datafile file number=00007 name=+OBTDG1/qa112asm/datafile/vindx.dbf
channel ORA_DISK_1: starting piece 1 at 22-JUL-10
channel ORA_DISK_1: finished piece 1 at 22-JUL-10
piece handle=/qa/obj/oracle/obt/output/QA112ASM/obt_standby_03_protection_tui/dttmp/back08ljcr97_1_1 tag=TAG20100722T011934 co
mment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:25
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
including current control file in backup set
including current SPFILE in backup set
channel ORA_DISK_1: starting piece 1 at 22-JUL-10
channel ORA_DISK_1: finished piece 1 at 22-JUL-10
piece handle=/qa/obj/oracle/obt/output/QA112ASM/obt_standby_03_protection_tui/dttmp/back09ljcra0_1_1 tag=TAG20100722T011934 co
mment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 22-JUL-10
RMAN> shutdown immediate
Oracle instance shut down
RMAN> startup mount
connected to target database (not started)
Oracle instance started
database mounted
Total System Global Area 275615744 bytes
Fixed Size 2168944 bytes
Variable Size 184551312 bytes
Database Buffers 83886080 bytes
Redo Buffers 5009408 bytes
RMAN>run(
*run {*
set newname for datafile '+OBTDG1/QA112ASM/users01.dbf' to '+OBTDG1/QA112ASM/users02.dbf' ;
restore datafile '+OBTDG1/QA112ASM/users01.dbf';
recover datafile '+OBTDG1/QA112ASM/users01.dbf' noredo;
switch datafile '+OBTDG1/QA112ASM/users02.dbf' ;
RMAN>
2> 3> 4> 5> 6>
executing command: SET NEWNAME
Starting restore at 22-JUL-10
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=137 device type=DISK
channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00006 to +OBTDG1/QA112ASM/datafile/users02.dbf
channel ORA_DISK_1: reading from backup piece /qa/obj/oracle/obt/output/QA112ASM/obt_standby_03_protection_tui/dttmp/back08ljc
r97_1_1
channel ORA_DISK_1: piece handle=/qa/obj/oracle/obt/output/QA112ASM/obt_standby_03_protection_tui/dttmp/back08ljcr97_1_1 tag=T
AG20100722T011934
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
Finished restore at 22-JUL-10
Starting recover at 22-JUL-10
using channel ORA_DISK_1
Finished recover at 22-JUL-10
datafile 6 switched to datafile copy
input datafile copy RECID=2 STAMP=724987222 file name=+OBTDG1/qa112asm/datafile/users02.dbf
RMAN> alter database open;
RMAN>
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of alter db command at 07/22/2010 01:20:23
ORA-01113: file 6 needs media recovery
ORA-01110: data file 6: '+OBTDG1/qa112asm/datafile/users02.dbf'
=======================================================
Edited by: user13310502 on Jul 23, 2010 4:49 AM

as you can see..
RMAN> sql "alter tablespace andreas offline";
sql statement: alter tablespace andreas offline
RMAN> run
2> {
3> set newname for datafile 8 to '+FRA';
4> restore datafile 8;
5> recover datafile 8;
6> switch datafile 8;
7> }
executing command: SET NEWNAME
Starting restore at 23-JUL-10
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile backupset restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
restoring datafile 00008 to +FRA
channel ORA_DISK_1: reading from backup piece +FRA/remtest/backupset/2010_07_23/nnndf0_tag20100723t135242_0.3112.725118763
channel ORA_DISK_1: restored backup piece 1
piece handle=+FRA/remtest/backupset/2010_07_23/nnndf0_tag20100723t135242_0.3112.725118763 tag=TAG20100723T135242
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
Finished restore at 23-JUL-10
Starting recover at 23-JUL-10
using channel ORA_DISK_1
starting media recovery
media recovery complete, elapsed time: 00:00:00
Finished recover at 23-JUL-10
datafile 8 switched to datafile copy
input datafile copy recid=7 stamp=725118807 filename=+FRA/remtest/datafile/andreas.3113.725118805
RMAN> sql "alter tablespace andreas online";
sql statement: alter tablespace andreas online
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of sql command on default channel at 07/23/2010 13:53:33
RMAN-11003: failure during parse/execution of SQL statement: alter tablespace andreas online
ORA-01113: file 8 needs media recovery
ORA-01110: data file 8: '+FRA/remtest/datafile/andreas.3113.725118805'
RMAN> run
2> {
3> set newname for datafile 8 to '+FRA';
4> restore datafile 8;
5> switch datafile 8;
6> recover datafile 8;
7> }
executing command: SET NEWNAME
Starting restore at 23-JUL-10
using channel ORA_DISK_1
channel ORA_DISK_1: restoring datafile 00008
input datafile copy recid=8 stamp=725118807 filename=+DATA/remtest/datafile/andreas.349.725036143
destination for restore of datafile 00008: +FRA
channel ORA_DISK_1: copied datafile copy of datafile 00008
output filename=+FRA/remtest/datafile/andreas.3114.725118849 recid=9 stamp=725118849
Finished restore at 23-JUL-10
datafile 8 switched to datafile copy
input datafile copy recid=10 stamp=725118850 filename=+FRA/remtest/datafile/andreas.3114.725118849
Starting recover at 23-JUL-10
using channel ORA_DISK_1
starting media recovery
media recovery complete, elapsed time: 00:00:01
Finished recover at 23-JUL-10
RMAN> sql "alter tablespace andreas online";
sql statement: alter tablespace andreas online

How to Re org the SQL 2008 database to have equal size data files

Hello everyone -
I have I/O issue with our production system (SAP ECC 6.0 on Windows 2008 and MSSQL 2008).
Following are my I/0 stats in DB02 (since DB Start)
ECPDATA1     E:     Data       25.779     28.053     4.689     1,056.68     36.297     23.326     2.515     45.301     14.43
ECPDATA2     E:     Data       23.143     24.979     4.68     593.297     17.971     12.448     1.238     47.663     14.518
ECPDATA3     G:     Data   9.17     9.807     3.477     1,018.69     36.144     21.938     2.457     46.434     14.712
ECPDATA4     F:     Data 10.985     11.788     2.69     148.512     4.777     3.248     0.314     45.722     15.201
ECPDATA5     F:     Data       14.746     16.164     2.676     162.39     6.693     3.679     0.432     44.139     15.491
ECPLOG1      D:     Log        5.337     27.081     4.916     26.962     26.264     0.037     1.919     726.928     13.688
ECPLOG2      F:     Log     0.755     17.582     0.487     35.472     35.161     0.042     2.637     845.998     13.334
The fourth column is ms/op which is very high and also asymmetrical for all the data files.
Also, The data files are not of equal size
ECPDATA1     106,173
ECPDATA2     59,588
ECPDATA3     105,036
ECPDATA4     14,992
ECPDATA5     16,491
ECPLOG1      1,025
ECPLOG2             3,199
So ECPdata1 and ECPdata3 are about 105 GB while #4 and #5 are 14 GB and 16 GB each. As per SQL best practices, all the Data files should be of equal size to get the best performance.
How do I make the data files with equal sizes ?
Your help is very much appreciated.
Thank you
-TSB

Hi dudes!
The key here is that you manually grow your datafiles before the autogrown mechanism comes to play; in fact, SAP recommends setting the autogrow just to avoid the hypothetical case that should never arrive in which the DB administrator forgot about the database size and it ran out of space.
Otherwise, if you properly monitor and manage your DB you should always grant that at least 30% (to say) of free space is allocated in your datafiles. If you do so, the SQL Server engine should do the rest, as it follows a proportional filling strategy as you can read in SAP note 1238993.
In case your database is not still proportional, my advise is that you just manually grow the datafiles so that all them are the same size, and so SQL Server will do the rest. If you however need to addresss that immediately, you will need to reorganize your database, which is not just more sensitive and complicate, but also which involves some I/O intensive operations (check SAP note 159316).
Cheers!!
--Jesú

I have copy of data files! How to install and add these files to database!

Dear All,
I am using Oracle 11gR1 and Linux is the operating system.
I have OS level copy of my data files. This also includes the system and user tablespace data files.
Here is the list of datafiles:
*/DB/app/oracle/oradata/bssglb/system01.dbf*
*/DB/app/oracle/oradata/bssglb/sysaux01.dbf*
*/iscsi/oracle/db/undotbs05.dbf*
*/DB/app/oracle/oradata/bssglb/users01.dbf*
*/DB/app/oracle/oradata/bssglb/bss01.dbf*
*/var/oracle/oradata/bssglb/bss02*
*/var/oracle/oradata/bssglb/system02.dbf*
*/iscsi/oracle/db/bss03.dbf*
*/iscsi/oracle/db/bssdevp01.dbf*
I need to copy these files to a fresh install oracle database, kindly let me know the steps or any helpful document.
Thank you, Imran

I created control files with command:
CREATE CONTROLFILE REUSE DATABASE "BSSGLB" NORESETLOGS NOARCHIVELOG
    MAXLOGFILES 32
    MAXLOGMEMBERS 5
    MAXDATAFILES 600
    MAXINSTANCES 10
    MAXLOGHISTORY 1168
LOGFILE
GROUP 1 '/DB/app/oracle/oradata/bssglb/redo01.log' SIZE 500M,
GROUP 2 '/DB/app/oracle/oradata/bssglb/redo02.log' SIZE 500M,
GROUP 3 '/DB/app/oracle/oradata/bssglb/redo03.log' SIZE 500M
-- STANDBY LOGFILE
DATAFILE
'/DB/app/oracle/oradata/bssglb/system01.dbf',
'/DB/app/oracle/oradata/bssglb/sysaux01.dbf',
'/DB/app/oracle/oradata/bssglb/users01.dbf',
'/DB/app/oracle/oradata/bssglb/bss01.dbf',
'/var/oracle/oradata/bssglb/bss02',
'/var/oracle/oradata/bssglb/system02.dbf'
CHARACTER SET US7ASCII
;I have all the files mentioned in the datafile section of the above command.
But somehow when i try to open the DB, first it asks for the media recover. When i recover database then it disconnects database saying:
ERROR at line 1:
ORA-01092: ORACLE instance terminated. Disconnection forced
Process ID: 4768
Session ID: 170 Serial number: 5Contents of the alert log file are:
Beginning crash recovery of 1 threads
parallel recovery started with 3 processes
Started redo scan
Completed redo scan
1 redo blocks read, 0 data blocks need recovery
Started redo application at
Thread 1: logseq 7, block 2, scn 20356182450
Recovery of Online Redo Log: Thread 1 Group 1 Seq 7 Reading mem 0
Mem# 0: /DB/app/oracle/oradata/bssglb/redo01.log
Completed redo application
Completed crash recovery at
Thread 1: logseq 7, block 3, scn 20356202453
0 data blocks read, 0 data blocks written, 1 redo blocks read
Sun Feb 20 08:16:23 2011
Thread 1 advanced to log sequence 8
Thread 1 opened at log sequence 8
Current log# 2 seq# 8 mem# 0: /DB/app/oracle/oradata/bssglb/redo02.log
Successful open of redo thread 1
MTTR advisory is disabled because FAST_START_MTTR_TARGET is not set
Sun Feb 20 08:16:23 2011
SMON: enabling cache recovery
Errors in file /Oracle/app/oracle/diag/rdbms/bssglb/bssglb/trace/bssglb_ora_4550.trc:
ORA-01173: data dictionary indicates missing data file from system tablespace
Error 1173 happened during db open, shutting down database
USER (ospid: 4550): terminating the instance due to error 1173
Sun Feb 20 08:16:25 2011
Instance terminated by USER, pid = 4550
ORA-1092 signalled during: alter database open...
ORA-1092 : opiodr aborting process unknown ospid (4550_182910338848)
Sun Feb 20 08:16:26 2011
ORA-1092 : opitsk aborting processPlease help

Number of data files per database!

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