Additionally, you might also need operating system privileges to copy files to the desired location and privileges to open and back up the database. The disk maybe located on different datastore grep -i filename myVM.VMX | grep -i vmdk this command will show the current disk in use 6. When powering on a virtual machine, you see this error message:The parent virtual disk has been modified since the child was created. The loss of the log file data can be catastrophic if recovery is required.
In addition, how to add a VMware server and configure a backup job. Lars 0 LVL 21 Overall: Level 21 VMware 19 Message Expert Comment by:za_mkh2009-09-17 Thanks Lars! The following statement forces a log switch: ALTER SYSTEM SWITCH LOGFILE; Verifying Blocks in Redo Log Files You can configure the database to use checksums to verify blocks in the redo Figure 6-3 Legal and Illegal Multiplexed Redo Log Configuration Description of "Figure 6-3 Legal and Illegal Multiplexed Redo Log Configuration" Placing Redo Log Members on Different Disks When setting up a imp source
For the most benefit, these locations should be on separate disks. In typical configurations, only one database instance accesses an Oracle Database, so only one thread is present. So to get around my EqualLogic storage warnings and alarms, I increased the size of my volume to 125GB. Now I needed to tell VMware about the change in the VMFS The size of the new members is determined from the size of the existing members of the group.
This happened to me a while ago before I was familiar with just how much our datastore was dynamically changing, about 30 VM's with a question for out of space! Use the ALTER DATABASE statement with the RENAME FILE clause to rename the database redo log files. Right click the VM and use Snapshot Manager to delete all snapshots. After dropping a redo log group, make sure that the drop completed successfully, and then use the appropriate operating system command to delete the dropped redo log files.
Choosing the Number of Redo Log Files The best way to determine the appropriate number of redo log files for a database instance is to test different configurations. You can drop a redo log member only if it is not part of an active or current group. The minimum size permitted for a redo log file is 4 MB. https://www.experts-exchange.com/questions/26757775/There-is-no-more-space-for-redo-log.html If the ARCHIVE_LAG_TARGET initialization parameter is set to a very low value, there can be a negative impact on performance.
Creating another snapshot causes the existing snapshot delta disk to retain its current size, however the next delta disk will begin to store all forthcoming modifications and writes. This can force frequent log switches. You should try freeing some disk space before doing this as a snapshot deletion mey fail if the disk is 100% full. Planning the Redo Log This section provides guidelines you should consider when configuring a database instance redo log and contains the following topics: Multiplexing Redo Log Files Placing Redo Log Members
I tried to commit snapshots overnight with no effect. http://virtuallyhyper.com/2012/09/what-is-the-difference-between-a-redo-log-and-a-snapshot/ I just wanted to let you know that your article was appreciated because we so often do not get positive feedback on these things. If the vmkfstools command fails then a) This could be the reason of corrupt snapshot or b) You maybe running out of diskspace. In this case, you may need to perform media recovery.
The checksum is stored the header of the block. The problem cannot be solved easily in this case, since committing the snapshot will require even more space! When compatibility is set to 10.2.0 or later, you can exceed the MAXLOGFILES limit, and the control files expand as needed. Join Now For immediate help use Live now!
SHUTDOWN Copy the redo log files to the new location. For the conversion steps, read Bestway's article. This is the default setting. The only requirement for an instance redo log is that it have at least two groups.
vmware-cmd doesn't exist on ESXi 3.5 server and it looks like VMWare pulled Remote Command line or whatever it's called for it already. In this case, it is better to decrease the size of the redo log files slightly, so that two log groups could be archived on each tape. Because the estimated archival time is also considered, this is not the exact log switch time.
All members of the next group are inaccessible to LGWR at a log switch because of media failure Oracle Database returns an error, and the database instance shuts down. When you issue a delete all snapshots from the context menu of the Virtual Infrastructure (VI) client, if the disk space is insufficient to complete the operation, VMware has a nasty If you want to clear an unarchived redo log that is needed to bring an offline tablespace online, use the UNRECOVERABLE DATAFILE clause in the ALTER DATABASE CLEAR LOGFILE statement. During crash, instance, or media recovery, the database properly applies redo log files in ascending order by using the log sequence number of the necessary archived and redo log files.
Setting the Size of Redo Log Members When setting the size of redo log files, consider whether you will be archiving the redo log. Opting to save virtual machine memory contents with each Create Snapshot task requires additional space from the VMFS datastore. SELECT GROUP#, ARCHIVED, STATUS FROM V$LOG; GROUP# ARC STATUS --------- --- ---------------- 1 YES ACTIVE 2 NO CURRENT 3 YES INACTIVE 4 YES INACTIVE Drop a redo log group with the ARCHIVE_LAG_TARGET is a dynamic parameter and can be set with the ALTER SYSTEM SET statement.
Setting the ARCHIVE_LAG_TARGET Initialization Parameter When you set the ARCHIVE_LAG_TARGET initialization parameter, you cause the database to examine the current redo log of the instance periodically.