Database failover logging
We have had a couple database failovers without any indications in the logging as to what triggered the failover. One such event just occurred this morning and from the logs we can see when we moved the databases back but are not able to see any error that
would have caused the initial failover. With everything that is logged in the Exchange logging folders there must be something but I am at a loss as to which logs they would be, partly because there are so many and once in its a wall of text and without knowing
which to concentrate on they all look the same.
We have 2 mailbox servers in our primary datacenter that have a database copy in our secondary datacenter. The database copy server can handle the load of one server's databases (at least on weekends when we do scheduled maintenance) but as we are seeing
not both. When both primary database servers failed their mailboxes to the secondary people started having connection issues/very slow response.
Strangely in the Exchange\HighAvailability\Debug event logs stop at 7:53AM and resume at 9:04AM this morning and our first reported case of mailbox unavailable was at 8:05AM. I started activating the database copies back to the primary servers right around
9AM. Everything is back to normal but we are still trying to nail down what exactly happened, hence this ticket regarding the logs.
Hi,
Have you checked the application log and system log? Is there any related error messages?
If there is no any related events, I'm afraid it's hard to troubleshoot the root cause of this issue, as what Nithyanandham Singaravadivelu suggestioned above. Please check the application around the time when this issue appears again.
And you can use the Test-ReplicationHealth command and the Get-MailboxDatabaseCopyStatus cmdlet to check your DAG state.
Best regards,
Belinda Ma
TechNet Community Support
Similar Messages
-
Messages Stuck in Submission Queue after Database failover to DR site
Hi Everyone,
Yesterday Night we had a Database failover to DR site but emails were stuck in the submission queue to resolve we failed back the Database. We have Exchange 2010 SP3 Ru4 with Active-Active DAG across 2 AD sites.
After checking the connectivity logs on the Transport server i found out that the Transport server was trying to connect to the mailbox server where this database was residing directly instead of using the Transport servers in the 2nd site.
We have 4 more databases on the same server but for those databases there was no issues and the mail flow was working fine.
Only thing i checked is that we have about 700 GB of log files for this database. Could that can cause this issue.Hi,
Thanks for your response.
I did not restart transport service. I assume restarting transport service might have resolved the issue.
But, i want to know the reason why this happened as we have stretch DAG so this can cause major outage in case more mailbox database fails over.
Removing the logs files is what i am thinking to do maybe within this week. -
Hi friends,
My server Intelligence Agent (SIA) can not start because the database service "SQLAnywhereForBI" can't start also. I got the following error :
"I . 08/09 20:35:06. A read failed with error code: (1392), Le fichier ou le répertoire est endommagé et illisible.
E. 08/09 20:35:06. Fatal error: cannot write to transaction log "C:\Program Files (x86)\SAP BusinessObjects\sqlanywhere\database\BI4_Audit.log"
E. 08/09 20:35:06. unable to start database "C:\Program Files (x86)\SAP BusinessObjects\sqlanywhere\database\BI4_CMS.db"
E. 08/09 20:35:06. Error writing to transaction log file
I. 08/09 20:35:06. Database server shutdown due to startup error "
inside the database log file.
Please, can you help meI found the solution by following the advice given on the following forum:
http://evtechnologies.com/transaction-logs-on-sybase-sql-anywhere-and-sap-businessobjects-bi-4-1
In fact, I crushed the BI4_Audit.db and BI4_Audit.log files and I replaced with others that I got from another machine where I installed BO again and where the files are not corrupted . After I logged in to the CMS database by executing the command in the command line:
dbisql -c "UID = DBA; PWD = mypassword; BI4 Server =; DBF = C: \ Program Files (x86) \ SAP BusinessObjects \ sqlanywhere \ database \ BI4_CMS.db."
Once connected, I start the command:
alter database 'C: \ Program Files (x86) \ SAP BusinessObjects \ sqlanywhere \ database \ BI4_Audit.db' alter log off;
The query runs successfully.
And that's good, I can be connected to BO smoothly.
Thank you again Eric -
Errors in Database Alert Log... Please Help
Hi All,
This database is on Oracle 8i but I found errors in the alert Log.
These errors are relating to archiving.
Please take a look at this file to see the details;
http://us.f13.yahoofs.com/bc/47aff3ab_a145/bc/My+Documents/Database+Alert+Log.LOG?bfUw9sHBkd_LbjY0
ARC0: Beginning to archive log# 11 seq# 301
Wed Feb 13 14:57:45 2008
ARC0: Completed archiving log# 11 seq# 301
Wed Feb 13 15:46:26 2008
Errors in file E:\Oracle\admin\MUKREC\udump\ORA03852.TRC:
Wed Feb 13 15:46:26 2008
Errors in file E:\Oracle\admin\MUKREC\udump\ORA03208.TRC:
Wed Feb 13 15:46:30 2008
Errors in file E:\Oracle\admin\MUKREC\udump\ORA03340.TRC:
Wed Feb 13 15:46:30 2008
Errors in file E:\Oracle\admin\MUKREC\udump\ORA00784.TRC:
Wed Feb 13 15:46:31 2008
Errors in file E:\Oracle\admin\MUKREC\udump\ORA03748.TRC:
Wed Feb 13 15:46:32 2008
Errors in file E:\Oracle\admin\MUKREC\udump\ORA01228.TRC:
Wed Feb 13 16:18:57 2008
Thread 1 advanced to log sequence 303
Current log# 13 seq# 303 mem# 0: E:\ORACLE\ORADATA\MUKREC\LOGS\REDO13.LOG
Wed Feb 13 16:18:57 2008
ARC2: Beginning to archive log# 12 seq# 302
Wed Feb 13 16:19:25 2008
ARC2: Completed archiving log# 12 seq# 302
Wed Feb 13 18:40:13 2008
Errors in file E:\Oracle\admin\MUKREC\udump\ORA03872.TRC:
Please help out. What is exactly the cause of this error and how can I avoid it next time from occuring.>> Please paste the output of E:\Oracle\admin\MUKREC\udump\ORA03872.TRC
Click on the link below to get the output of the ORA03872.TRC trace file
http://us.f13.yahoofs.com/bc/47aff3ab_a145/bc/My+Documents/ORA03872.TRC?bfMq_sHBSRis64KA
>> and last 100 lines of alert log
the last 100 lines of the alert log are here under;
Wed Feb 13 11:50:27 2008
Thread 1 advanced to log sequence 296
Current log# 13 seq# 296 mem# 0: E:\ORACLE\ORADATA\MUKREC\LOGS\REDO13.LOG
Wed Feb 13 11:50:27 2008
ARC0: Beginning to archive log# 12 seq# 295
Wed Feb 13 11:51:02 2008
ARC0: Completed archiving log# 12 seq# 295
Wed Feb 13 12:27:18 2008
Thread 1 advanced to log sequence 297
Current log# 7 seq# 297 mem# 0: E:\ORACLE\ORADATA\MUKREC\LOGS\REDO07.LOG
Wed Feb 13 12:27:18 2008
ARC0: Beginning to archive log# 13 seq# 296
Wed Feb 13 12:27:59 2008
Thread 1 advanced to log sequence 298
Current log# 8 seq# 298 mem# 0: E:\ORACLE\ORADATA\MUKREC\LOGS\REDO08.LOG
Wed Feb 13 12:27:59 2008
ARC1: Beginning to archive log# 13 seq# 296
ARC1: Failed to archive log# 13 seq# 296
ARC1: Beginning to archive log# 7 seq# 297
Wed Feb 13 12:28:33 2008
Thread 1 advanced to log sequence 299
Current log# 9 seq# 299 mem# 0: E:\ORACLE\ORADATA\MUKREC\LOGS\REDO09.LOG
Wed Feb 13 12:29:10 2008
Thread 1 advanced to log sequence 300
Current log# 10 seq# 300 mem# 0: E:\ORACLE\ORADATA\MUKREC\LOGS\REDO10.LOG
Wed Feb 13 12:29:11 2008
ARC0: Completed archiving log# 13 seq# 296
ARC0: STARTING ARCH PROCESSES
ARC2 started with pid=166
Wed Feb 13 12:29:11 2008
ARC0: STARTING ARCH PROCESSES COMPLETE
Wed Feb 13 12:29:11 2008
ARC0: Beginning to archive log# 7 seq# 297
ARC0: Failed to archive log# 7 seq# 297
ARC0: Beginning to archive log# 8 seq# 298
Wed Feb 13 12:29:12 2008
ARC2: Archival started
Wed Feb 13 12:29:32 2008
ARC1: Completed archiving log# 7 seq# 297
ARC1: Beginning to archive log# 8 seq# 298
ARC1: Failed to archive log# 8 seq# 298
ARC1: Beginning to archive log# 9 seq# 299
Wed Feb 13 12:29:48 2008
ARC0: Completed archiving log# 8 seq# 298
Wed Feb 13 12:29:48 2008
ARC2: Beginning to archive log# 9 seq# 299
ARC2: Failed to archive log# 9 seq# 299
Wed Feb 13 12:30:03 2008
ARC1: Completed archiving log# 9 seq# 299
Wed Feb 13 14:46:05 2008
Thread 1 advanced to log sequence 301
Current log# 11 seq# 301 mem# 0: E:\ORACLE\ORADATA\MUKREC\LOGS\REDO11.LOG
Wed Feb 13 14:46:05 2008
ARC1: Beginning to archive log# 10 seq# 300
Wed Feb 13 14:46:41 2008
ARC1: Completed archiving log# 10 seq# 300
Wed Feb 13 14:57:10 2008
Thread 1 advanced to log sequence 302
Current log# 12 seq# 302 mem# 0: E:\ORACLE\ORADATA\MUKREC\LOGS\REDO12.LOG
Wed Feb 13 14:57:10 2008
ARC0: Beginning to archive log# 11 seq# 301
Wed Feb 13 14:57:45 2008
ARC0: Completed archiving log# 11 seq# 301
Wed Feb 13 15:46:26 2008
Errors in file E:\Oracle\admin\MUKREC\udump\ORA03852.TRC:
Wed Feb 13 15:46:26 2008
Errors in file E:\Oracle\admin\MUKREC\udump\ORA03208.TRC:
Wed Feb 13 15:46:30 2008
Errors in file E:\Oracle\admin\MUKREC\udump\ORA03340.TRC:
Wed Feb 13 15:46:30 2008
Errors in file E:\Oracle\admin\MUKREC\udump\ORA00784.TRC:
Wed Feb 13 15:46:31 2008
Errors in file E:\Oracle\admin\MUKREC\udump\ORA03748.TRC:
Wed Feb 13 15:46:32 2008
Errors in file E:\Oracle\admin\MUKREC\udump\ORA01228.TRC:
Wed Feb 13 16:18:57 2008
Thread 1 advanced to log sequence 303
Current log# 13 seq# 303 mem# 0: E:\ORACLE\ORADATA\MUKREC\LOGS\REDO13.LOG
Wed Feb 13 16:18:57 2008
ARC2: Beginning to archive log# 12 seq# 302
Wed Feb 13 16:19:25 2008
ARC2: Completed archiving log# 12 seq# 302
Wed Feb 13 18:40:13 2008
Errors in file E:\Oracle\admin\MUKREC\udump\ORA03872.TRC:
Thu Feb 14 08:03:54 2008
Thread 1 advanced to log sequence 304
Thu Feb 14 08:03:54 2008
Current log# 7 seq# 304 mem# 0: E:\ORACLE\ORADATA\MUKREC\LOGS\REDO07.LOG
Thu Feb 14 08:03:55 2008
ARC1: Beginning to archive log# 13 seq# 303
Thu Feb 14 08:04:45 2008
ARC1: Completed archiving log# 13 seq# 303
Thu Feb 14 08:24:29 2008
Thread 1 advanced to log sequence 305
Current log# 8 seq# 305 mem# 0: E:\ORACLE\ORADATA\MUKREC\LOGS\REDO08.LOG
Thu Feb 14 08:24:29 2008
ARC0: Beginning to archive log# 7 seq# 304
Thu Feb 14 08:25:01 2008
ARC0: Completed archiving log# 7 seq# 304
------------------------------------------------------------------------------------------------------------------------------------ -
Best practice for default location of mailbox database(s) / logs
Hello,
I don't recall seeing any options during the Exchange 2013 install, to specify an alternate location for either the mailbox database or log files. I've reviewed the commands for moving the mailbox databases, but before reviewing the options for setting a
location for the log files, I thought it best to see whether it's still advised to separate log/mailbox databases away from the OS, with our Exchange server being a virtualised instance?
Also, I'm assuming that Exchange still requires the usual backup of transaction logs, for them to be cleared?
Many thanks.Hi JH,
here is a link to storage options and requirements for the Mailbox server :
http://technet.microsoft.com/en-us/library/ee832792(v=exchg.150).aspx
By default when installing New Exchange server With mailbox role,it will create default database and log path.
Recomended is to have Database and Log files on seperate disks.You will have to attache those disk first,then you can create New database using ECP.
Please look at my Gallery With full guide on how to setup New Exchange server.
http://gallery.technet.microsoft.com/Install-Exchange-server-b5cce9e4
Also for future use you might need to clean up log files to free up Space on Your Exchange server:
http://gallery.technet.microsoft.com/Task-Scheduler-to-cleanup-25047622
Hope this helps
Please mark as helpful if you find my contribution useful or as an answer if it does answer your question. That will encourage me - and others - to take time out to help you. Thank you! Off2work -
Want to Buy SQL 2008/2012 standard edition to achieve Database failover
Hi Team,
We want to know exact part code details to procure 2 nos Sql 2008/2012 standard edition server to installed on "Window 2012 R2 Standard Edition, Factory installed, no media, 2 socket,2 VMs, No client" Server.
I have Access control system application (Main-Standby) on which we need Automatic database failover by using SQL Standard server. Application vendor has suggested us to procure 2 nos of Microsoft Sql 2008/2012 standard edition server.
If possible then please let me know exact part code details of Sql 2008 and 2012 standard edition server which doesn't have any issue to installed on above said server edition.
Thanks,
VishalHi Vishal,
Unfortunately, we do not deal with part codes, I request you to check the below link as this is not the correct forum.
http://www.microsoft.com/en-in/server-cloud/products/sql-server/Support.aspx
Perhaps you could post you question on the SQL forum :
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/home?category=sqlserver
Regards,
Mekh. -
Production database Alert log Message
Hi,
I am using oracle 10gR1 on windows.Recently i have created a physical standby database (sid=smtm) and production database (sid=mtm).My production alter log file dispaly some thing like please suggest my what it shows.
Mon Mar 02 00:18:31 2009
Private_strands 7 at log switch
Thread 1 advanced to log sequence 35722
Current log# 4 seq# 35722 mem# 0: D:\ORACLE\PRODUCT\10.1.0\ORADATA\MTM\REDO04.LOG
Current log# 4 seq# 35722 mem# 1: D:\ORACLE\PRODUCT\10.1.0\ORADATA\MTM\REDO04_A.LOG
Mon Mar 02 00:18:31 2009
ARC1: Evaluating archive log 2 thread 1 sequence 35721
ARC1: Destination LOG_ARCHIVE_DEST_2 archival not expedited
Committing creation of archivelog 'E:\ORACLE\MTM\ARCHIVES\MTM_945F37AC_1_35721_500044525.ARC'
Invoking non-expedited destination LOG_ARCHIVE_DEST_2 thread 1 sequence 35721 host SMTM
*FAL[server, ARC1]: Begin FAL noexpedite archive (branch 500044525 thread 1 sequence 35721 dest SMTM)*
*FAL[server, ARC1]: Complete FAL noexpedite archive (thread 1 sequence 35721 destination SMTM)*Mon Mar 02 00:29:42 2009
Private_strands 7 at log switch
Thread 1 advanced to log sequence 35723
Current log# 3 seq# 35723 mem# 0: D:\ORACLE\PRODUCT\10.1.0\ORADATA\MTM\REDO03.LOG
Current log# 3 seq# 35723 mem# 1: D:\ORACLE\PRODUCT\10.1.0\ORADATA\MTM\REDO03_A.LOG
Mon Mar 02 00:29:42 2009
ARC1: Evaluating archive log 4 thread 1 sequence 35722
ARC1: Destination LOG_ARCHIVE_DEST_2 archival not expedited
Committing creation of archivelog 'E:\ORACLE\MTM\ARCHIVES\MTM_945F37AC_1_35722_500044525.ARC'
Invoking non-expedited destination LOG_ARCHIVE_DEST_2 thread 1 sequence 35722 host SMTM
*FAL[server, ARC1]: Begin FAL noexpedite archive (branch 500044525 thread 1 sequence 35722 dest SMTM)*
*FAL[server, ARC1]: Complete FAL noexpedite archive (thread 1 sequence 35722 destination SMTM)*
ThanksSorry i have no metalink account.
On production database there is no any ORA error and on standby database Alert log shows.
Mon Mar 02 03:40:38 2009
RFS[1]: No standby redo logfiles created
RFS[1]: Archived Log: 'E:\ORACLE\PRODUCT\10.1.0\ARCHIVES\MTM_945F37AC_1_35728_500044525.ARC'
Committing creation of archivelog 'E:\ORACLE\PRODUCT\10.1.0\ARCHIVES\MTM_945F37AC_1_35728_500044525.ARC'
RFS[1]: No standby redo logfiles created
RFS[1]: Archived Log: 'E:\ORACLE\PRODUCT\10.1.0\ARCHIVES\MTM_945F37AC_1_35729_500044525.ARC'
Committing creation of archivelog 'E:\ORACLE\PRODUCT\10.1.0\ARCHIVES\MTM_945F37AC_1_35729_500044525.ARC'
RFS[1]: No standby redo logfiles created
RFS[1]: Archived Log: 'E:\ORACLE\PRODUCT\10.1.0\ARCHIVES\MTM_945F37AC_1_35730_500044525.ARC'
Committing creation of archivelog 'E:\ORACLE\PRODUCT\10.1.0\ARCHIVES\MTM_945F37AC_1_35730_500044525.ARC'Mon Mar 02 04:29:14 2009
RFS[1]: No standby redo logfiles created
RFS[1]: Archived Log: 'E:\ORACLE\PRODUCT\10.1.0\ARCHIVES\MTM_945F37AC_1_35731_500044525.ARC'
Committing creation of archivelog 'E:\ORACLE\PRODUCT\10.1.0\ARCHIVES\MTM_945F37AC_1_35731_500044525.ARC'
Media Recovery Log
ORA-279 signalled during: ALTER DATABASE RECOVER standby database ...Mon Mar 02 11:01:57 2009
ALTER DATABASE RECOVER CONTINUE DEFAULT
Mon Mar 02 11:01:57 2009
Media Recovery Log E:\ORACLE\PRODUCT\10.1.0\ARCHIVES\MTM_945F37AC_1_35553_500044525.ARC
ORA-279 signalled during: ALTER DATABASE RECOVER CONTINUE DEFAULT ...Mon Mar 02 11:02:05 2009
ALTER DATABASE RECOVER CONTINUE DEFAULT
Media Recovery Log E:\ORACLE\PRODUCT\10.1.0\ARCHIVES\MTM_945F37AC_1_35554_500044525.ARC
ORA-279 signalled during: ALTER DATABASE RECOVER CONTINUE DEFAULT ...
Mon Mar 02 11:02:14 2009
ALTER DATABASE RECOVER CONTINUE DEFAULT
Media Recovery Log E:\ORACLE\PRODUCT\10.1.0\ARCHIVES\MTM_945F37AC_1_35555_500044525.ARC
ORA-279 signalled during: ALTER DATABASE RECOVER CONTINUE DEFAULT ...
Regards
Thanks for reply. -
Error in primary database alert log
Dear all i am getting the following error in my primary database alert log
oracle 10.2.0.3
Os/ rhel 4
Errors in file /u01/app/oracle/admin/PROSVR1/bdump/prosvr1_arc0_26151.trc:
ORA-00088: command cannot be executed by shared server
Tue Jul 7 23:20:37 2009
PING[ARC0]: Heartbeat failed to connect to standby 'DRSVR1'. Error is 88.
Tue Jul 7 23:25:38 2009
Errors in file /u01/app/oracle/admin/PROSVR1/bdump/prosvr1_arc0_26151.trc:
ORA-00088: command cannot be executed by shared server
Tue Jul 7 23:25:38 2009
PING[ARC0]: Heartbeat failed to connect to standby 'DRSVR1'. Error is 88.
Please let me know what needs to be done.
THanks in advance,
Aj00088, 00000, "command cannot be executed by shared server "
// *Cause: Debug command issued on shared server.
// *Action: Reissue the command using a dedicated server. -
I am geting errors in my database alert log file ora-12012 and ora 44003
Hi all,
I am using oracle 10g ...10.2.0.1.0 and OS is solaris 10.......
i am geting these errors in my database alert log file last two days..i am not geting why it is coming?
ORA-12012: error on auto execute of job 8887
ORA-44003: invalid SQL name
and trace file is i got i am posting here please help any one is aware about this....
System name: SunOS
Node name: obrmzone1
Release: 5.10
Version: Generic_137111-06
Machine: sun4v
Instance name: ------
Redo thread mounted by this instance: 1
Oracle process number: 144
Unix process pid: 26874, image:--------- (J000)
*** ACTION NAME:(AUTO_SPACE_ADVISOR_JOB) 2011-06-10 22:00:49.372
*** MODULE NAME:(DBMS_SCHEDULER) 2011-06-10 22:00:49.372
*** SERVICE NAME:(SYS$USERS) 2011-06-10 22:00:49.372
*** SESSION ID:(110.7114) 2011-06-10 22:00:49.372
*** 2011-06-10 22:00:49.372
ORA-12012: error on auto execute of job 8887
ORA-44003: invalid SQL name
thank you in advance,
DavI just google with "ORA-44003: invalid SQL name" and found below link:
http://www.oracle-base.com/articles/10g/dbms_assert_10gR2.php
SIMPLE_SQL_NAME
The SIMPLE_SQL_NAME function checks the input string conforms to the basic characteristics of a simple SQL name:
The first character of the name is alphabetic.
The name only contains alphanumeric characters or the "_", "$", "#"
Quoted names must be enclosed by double quotes and may contain any characters, including quotes provided they are represented by two quotes in a row ("").
The function ignores leading and trailing white spaces are ignored
The length of the input string is not validated. -
The database alert log has errors. Please help me
Hi all
I have an Oracle 8i Database that seams to be functioning well but when I
Checked the Database alert Log I realized that something is not fine
Part of the alert log content is here under. What can be problem and how can I
Resolve it. Please I need you assistance...
Thu Feb 07 08:50:37 2008
Thread 1 advanced to log sequence 266
Thu Feb 07 08:50:37 2008
Current log# 11 seq# 266 mem# 0: E:\ORACLE\ORADATA\MUKREC\LOGS\REDO11.LOG
Thu Feb 07 08:50:38 2008
ARC0: Beginning to archive log# 10 seq# 265
Thu Feb 07 08:51:07 2008
ARC0: Completed archiving log# 10 seq# 265
Thu Feb 07 09:23:22 2008
Errors in file E:\Oracle\admin\MUKREC\udump\ORA03976.TRC:
Thu Feb 07 09:23:23 2008
Errors in file E:\Oracle\admin\MUKREC\udump\ORA04092.TRC:
................................................................................................................I'll just throw a shameless copy-paste from Metalink note : 164839.1 , hope you can use it to get further ? :
Subject: FATAL ERROR IN TWO-TASK SERVER: error = 12571 Found in Alert File
Doc ID: Note:164839.1 Type: PROBLEM
Last Revision Date: 17-DEC-2007 Status: PUBLISHED
fact: Oracle Server - Enterprise Edition
symptom: Errors appear in alert file
symptom: FATAL ERROR IN TWO-TASK SERVER:
symptom: ERROR = 12571
symptom: trace file generated
symptom: Database operations continue successfully
cause: The most common cause for the above error is an ungraceful
disconnection of a session from the oracle db while the db is currently running
a dml statement issued by that session. The error is recorded when oracle
attempts to reply back to the session with the results of the dml and cannot
access the session. Overall database operations are usually not affected.
An ungraceful disconnection could cause by but is not limited to any of the
following:
- the client machine crashed
- the network connection crashed
- the user exited the session improperly (not issuing the 'exit' command)
- the user application allows the user to exit the application without properly
terminating the session.
The above can cause problems with corrupted rollback segments if occurring on a
regular basis and is not addressed. This would require db recovery and
possibly a db rebuild (not a light matter)
PMON will usually rollback most transactions in the rollback segments for a
session if it finds that the session has been ungracefully disconnected, but
there is always a chance that it cannot and this will lead to rollback segment
corruption.
fix:
The dml and the user that issued the dml can be determined from the trace file.
The current dml is in the tracefile header section. The user can be found in
the process state dump of the trace. The process state shows the machine,
o/suser, and user for the session.
The DBA can use this information to determine what the user was doing at the
time and if there was an ungraceful exit from the session the user was
utilizing.
The DBA should then address the cause of the ungraceful exit to reduce the
possibility of recurrence. -
Standby database archive log apply in production server.
Dear All,
How I apply standby database archive log apply in production server.
Please help me.
Thanks,
ManasHow can i use standby database as primary for that 48 hour ?Perform a switchover (role transitions).
First check if the standby is in sync with the primary database.
Primary database:
sql>select max(sequence#) from v$archived_log; ---> Value AStandby database:
sql>select max(sequence#) from v$archived_log where applied='YES'; -----> Value BCheck if Value B is same as Value A.
If the standby is in sycn with the primary database, then perform the switchover operation (refer the below link)
http://www.articles.freemegazone.com/oracle-switchover-physical-standby-database.php
http://docs.oracle.com/cd/B19306_01/server.102/b14230/sofo.htm
http://www.oracle-base.com/articles/9i/DataGuard.php#DatabaseSwitchover
manas
Handle: manas
Email: [email protected]
Status Level: Newbie
Registered: Jan 24, 2012
Total Posts: 10
Total Questions: 3 (3 unresolved)
Name Manas
Location kolkata Mark your questions as answered if you feel that you have got better answers rather than building up a heap of unanswered questions. -
2005 database and log file locations
Is there a SQL query to list where exactly the database and log files reside for all databases on an instance (sql server 2005)?
You can query the Information form DMV
sys.master_files (Transact-SQL)
SELECT *
FROM [sys].[master_files]
Olaf Helper
[ Blog] [ Xing] [ MVP] -
Move Exchange Server 2010 SP1 databases and log files to another partition
My company has been running Exchange Server 2010 SP1 on virtual machine for almost three years. My colleague created this virtual machine (Windows Server 2008 R2 SP1) before Exchange Server installation with following partitions:
C partition - for Windows Server 2008 R2 SP1 OS (size 40 GB)
E partition - for Exchange Server 2010 SP1 databases and logs (size 410 GB)
Those two partitions are on the same virtual hard disk "next to one another" so I can not extend C partition which gets filled up with IIS logs (when C partition free space is under 10 GB I am backing up these logs with backup software and afterwards
deleting them thus freeing up space on C partition). I have 2 databases (along with Public Folders) and size of these databases and their logs is around 235 GB.
Is it safe to move these databases and their logs to another partition which I would create on separate virtual hard disk for this purpose only and how much time this process might take since during this process databases
would be dismounted and inaccessible to all users? He made big blunder in my opinion but I have to solve this.Yes, its safe to move the DB/Logs. You can follow the procedure mentioned in this article to do it via EMC or Shell... http://exchangeserverpro.com/move-exchange-2010-database-folder/
But it depends on various factors on how long it is going take, like size of the database/logs, server performance, storage performance etc...
Besides this, upgrade Exchange 2010 SP1 to SP3, SP1/SP2 aren't supported anymore! http://blogs.technet.com/b/rmilne/archive/2014/04/09/end-of-exchange-2010-sp2-support.aspx
Blog |
Get Your Exchange Powershell Tip of the Day from here -
Database, redo log files accessiblity
Hi guys!
I have a quick question regarding Oracle File Permissions (Operational Security Check).
How would one check if the Oracle files are not world read/writeable
(database, redo log and control files are not world accessible)?
Thanks!Hi guys!
I have a quick question regarding Oracle File Permissions (Operational Security Check).What is this referring to?
How would one check if the Oracle files are not world read/writeable
(database, redo log and control files are not world accessible)?Example from a lab setup on AIX
$ find $ORACLE_HOME | wc -l
18197
$ find $ORACLE_HOME -perm -0002
If "at least" the world writable bit is set, find will list files in and below Home top directory. -
Why don't we keep Oracle Database ARCH logs in RAW devices
Hi All,
Why don't we keep Oracle Database ARCH logs in RAW devices?
How ARCH process is related to Block Device and Character Device ?
Thanks,
Tusar
Edited by: user11987718 on 26-Jun-2012 09:59Why don't we keep Oracle Database ARCH logs in RAW devices? 1.This is because raw devices do not enable sequential writing of consecutive archive log files.
http://docs.oracle.com/cd/E11882_01/rac.112/e16795/rman.htm#RACAD320
2.with raw you have to specify the exact size of the file at creation time, in contrast with file system, where you can create file without specifying its size, start writing to it, apending new blocks to it until you are done, and thus creating a file of whatever size it needs to be to hold all information.
http://www.dbasupport.com/forums/archive/index.php/t-16429.html
3.raw file systems are difficult to manage because you cannot run normal os commands on them.(as there is no file systems)
How ARCH process is related to Block Device and Character Device ?A block device would read/write bytes in fixed size blocks, as in disk sectors. Character devices read/write 0 or more bytes, in a stream, such as a TTY or a keyboard.
For more details about what is block and character device type :
http://en.wikipedia.org/wiki/Device_file
And now think, how arch process is related to block and character devices.
Regards
Girish Sharma
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