Resync ASM disk in 12 c
Hello
Please can someone tell what is the difference between ASM resynchronization and consolidation of disk drive?
Are they different? If so, what is re-synchronization happens and when to rebalance?
Thank you
Fast ASM disk Resync is used to recovery failure a failure to make temporarily unavailable group is considered transient failures.
As the disconnection of the cable, controller failures or interruptions of supply disk or host bus adapter current.
You just put a time (duration) where ASM Diskgroup will be to track all the changes up to recover this failure. If records are retrieved using the last State when, down disc Resync then update all the blocks on the disk recovered from survive failgroup.
If drive failure is not picked up within the window of time, records are automatically removed from the diskgroup.
The process of adding these drive broke diskgroup start the rebalancing process.
Resynchronization occurs when updating the out-of-sync disk track.
Rebalancing occurs when data are not balanced or when to add new disc on diskgroup.
Tags: Database
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Hello
When I compare the size of the operating system disks, each is 2.6 to.
But when I look at ASM, they are 2 TB each.
I'm reasonably sure, not 100%, I've created with external redundancy, so I thought the asm disks would be the same size as the operating system.
fdisk -l data /dev/sdb1 2627.4 GB data2 /dev/sdg1 2627.4 GB Name REDUNDA MOUNT_S TOTAL_MB FREE_MB OS_MB ------------- ------- ---------- ---------- ---------- - DATA UNKNOWN CACHED 2097144 842200 2097150 DATA UNKNOWN CACHED 2097144 842392 2097150
Can someone explain this to me?
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Version of grid Infrastructure? ASM has limit GI version< 11.2="" on="" maximum="" size="" of="" luns="" (2tb)="" that="" can="" be="" used="" for="" asm="">
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Hi Experts,
If you use network storage, configure ASM disks with external redundancy groups. Don't use groups of Oracle ASM failure. Oracle failure groups consume cycles additional CPU and can run in unpredictable ways after suffering from a disk failure. When you use external redundancy, disk failure are transparent to the database and do consume no additional database CPU cycle, because it is discharged on storage processors.
This does not mean
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Hello
You can check the storage analysis as well...
http://www.Dell.com/downloads/global/solutions/tradeoffs_RAID5_RAID10.PDF
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https://asktom.Oracle.com/pls/asktom/f?p=100:11:P11_QUESTION_ID:359617936136
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Hello 1026384,
If disks are displayed in the list during installation of the network infrastructure, then try to give the /dev/oracleasm/discs / * in the window change the disk discovery trail .
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Hi guys,.
I'm trying to install Oracle 11 g R2 RAC and as part of the installation of the grid, the Setup program does not detect the ASM disks.
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Reload from disk partitions: fact
Cleaning up stale ASM disks...
ASM disks scanning system...
Instantiation of disk 'ASMDATA2 '.
Instantiation of disk 'ASMDATA1 '.
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ASMDATA1
ASMDATA2
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Total 0
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Praveen
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Dear friends,
I have two questions regarding disc Dataguard and ASM.
(> > 1) for best performance, periodically, we rebuild the index index and analysis analyze table. What is the best periodic steps to do to get better performance?
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(> > 2) if I run analyze the index or the table on my PRODUCTION system he replicated this effect on statndby dataguard automatic system? If so, how it is replicated?
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"on my PRODUCTION'---> you mean"on my FIRST.
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Hello
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[dev root@grid1] # / usr/sbin/oracleasm listdisks
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DATA02
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FRA02
OCRVOTE01
OCRVOTE02
OCRVOTE03
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ASMLib /opt/oracle/extapi/64/asm/orcl/1/libasm.so using
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Disk discovery: ORCL:DATA02 [31455232 blocks (16105078784 bytes), maxio 512]
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[records root@grid1] # pwd
/ dev/oracleasm/Disks
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Total 0
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oracleasmlib - 2.0.4 - 1.el6.x86_64
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oraclelinux-release-notes-6Server - 14.x86_64
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Oracle-logos - 60.0.14 - 1.0.2.el6.noarch
to clarify this, please login as user "grid" and run the command
id
This will show you if id is a member of the Group asmadmin.
Martin
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Adding a device to ASM disk using asmtool
Hello
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Now if I run oracleasm createdisk, it is said that the devices are busy. No, I removed the mounts of the devices in/etc/fstab. Now createdisk said that "the device is not a partition. Now I use asmtool command instead:
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That works fine, but I need to add more then one device to drive OCRVOTE. If I do
/ usr/sbin/asmtool - c-l/dev/oracleasm n OCRVOTE s/dev/sdd - force = yes
It is said: asmtool: unable to create 'OCRVOTE' ASM disk: file exists
Hello
You're basically labelling records at the level of the BONE.
This name must be unique.
You must give the label name different labelling while.
/ usr/sbin/asmtool - c-l/dev/oracleasm - n OCRVOTE1 s/dev/SDS - a force = yes
Then use ASM diskgroup in the future.
Kind regards
Loriette
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Unlike used MB of available space in the ASM disk between primary and standby database group
Hi all
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Primary
-------
NAME TOTAL USED GB FREE GB REQUIRED FREE GB USABLE % USABLE free of CHARGE (GB)
------------------------------ ------------ ------------ ------------ ---------------- ---------------- --------------
Data1 141 534 66 082 75 452 15 726 42.0 59 726
DATA_XDP501 17 766 11 635 6 131 2 538 3 593 20.0
Standby
NAME TOTAL USED GB FREE GB REQUIRED FREE GB USABLE % USABLE FREE (GB)
------------------------------ ------------ ------------ ------------ ---------------- ---------------- --------------
Data1 141 534 57 059 84 475 15 726 68 749 49.0
DATA_XDP801 17 766 11 781 5 985 2 538 3 447 19.0
Mode standby is runnig like
OPEN_MODE
--------------------
READ ONLY TO APPLY
Some body give an overview on what could be the purpose or specific controls will help
Thank you
Soundar.M
Hello
You can run sql in below document ASM sqlplus.
Then, you will come to know which files are files of redundent on ASM diskgroup.
HOW to map ASM FILES WITH FILES of DATABASE ONLINE (Doc ID 552082.1)
Delete these additional level of the DSO files, then validate.
Kind regards
Loriette -
ASM disk added without scan on the second node
Hi all
Oracle Version: 11.2.0.3
I need a help for a problem with the addition of ASM disks.
It is a node two CARS and a disk group was filled.
A drive was available as UNUSED001 and so we renamed it ran scan disk and disk added to the diskgroup on node1.
But, as we have not run scan disk on the second node, the name is still the poster as UNUSED001 and assigned to diskgroup showing as a MEMBER.
In addition, the renamed disk shows as a MEMBER but not attributed with any diskgroup.
Usually, when this heppens we have to restart the node to solve the problem, but would like to get idea if this can be fixed without bouncing nodes.
I restarted node and that fixed the issue.
Closing this thread.
Thank you guys.
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file data and the ASM disks.
Hi experts,
We have a situation where one of the data file has been corrupted. Can we find the related ASM disk... no request to find that the drive associated with asm (physical disk) will be useful...
because for example I need to find the disk related asm for the data file: +disk_group_1/my_dir/my_file.dbf
Kind regards
Spengler
Hi Spengler,
In ASM we saw exactly the same as database.
What you do is,
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. . + Now check where the distribution of the
is distributed for this file. To do this, run the command UESA (read-only)
UESA - diskstring '
'-' ' dump - noimage This will generate a new directory.
on the inside you will see 2 files.
+ Now open
the .map file and find this filenumber, it is like F00000NNN Where NNN corresponds to file_number
+ See related disc of the map as N00n file, then look for this file report.txt N00n.
-This will give you disc associated with this asm file.
Kind regards
Loriette -
11 GR 2 Grid Infrastructure install - with normal redundancy ASM disk group requires 3 disks?
HelloI want to install 11 GR 2 grid Infrastructure in a new environment in cluster - 2 nodes). I use the 11.2.0.4 GI Installer on Oracle Linux 6.5 x 86-64
However when it is in the installer of GI, it comes to choose the storage Option - I choose ASM disk groups.
Then change the path of discovery to pick up my candidate ASM disks.
I enter the disk group name SIR give Normal redundancy, choose 2 discs of candidate and then press < next > to Setup.
However, I gives me the message
[INS-30510] Insufficient number of ASM disks selected
The number of selected disks was inadequate for the level of redundancy selected
For a disk group with redundancy level "Normal" disks at least "3" are recommended
I always thought that Redunancy Normal required only 2 discs and high redundancy requires 3 disks?
No idea what is gpoing?
Thank you
Jim
Consult the following notes for how to move:
Concerning
Thomas
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Difference between ADVM Volume and filesystem ACFS ASM disk group
Q1. What is the difference between an ASM disk group and a Volume of ADVM?
In my opinion, an ASM disk group is actually a logical volume to the database (including the FRA files) files.
11 GR 2 appears to have introduced the notions of volumes ADVM and filesystems ACFS.
11 GR 2 ASM disk group can contain:
- ASM disks
- Volumes ADVM
- Filesystems ACFS
Q2. ADVM volumes appear to be dynamic volumes.
However is it therefore not effectively overlaying a logical volume (the volume ADVM) under ASM disk group (conceptually a logical volume as well)?
Even worse, if you left the ASM disk group redundancy in hardware RAID / SAN level (as recommended Oracle), you actually have 3 layers of logical disk? (ASM on top of ADVM on top of RAID/SAN)?
Q3. If it is 2 layers of logical disk (i.e. on top of ADVM ASM), what makes this better than 2 layers using a 3rd party volume manager (for example the DSO at the top of the 3rd party LVM) - something Oracle encourages against?
Q4. ACFS file systems, seem to be file systems clustered for not including ORACLE_HOMEs database files, application exe etc (but NOT GRID_HOME, OS root, OCR or voting records)
Can you create / modify filesystems ACFS using ASM.
The diagram of topology of oracle for ASM in ASM 11 GR 2 administration guide, says ACF in ASM. I'm not sure about that if ACFS belongs to ASM or ASM is located at the top of the ACF?
Q5. Connected to the 4th quarter. There seems to be a number of different ways, ACFS file systems can be created? Which of this is the valid methods?
- Thanks to ASM?
- through native OS file system creation?
- through OEM?
- through acfsutil?
my head explodes
Any help and clarification appreciated
Jim
Q1 - volume ADVM is a type of special file created at the DG of the DSO. Once created, it creates a block device on the BONE itself which can be used as any other block device. http://docs.Oracle.com/CD/E16655_01/server.121/e17612/asmfilesystem.htm#OSTMG30000
Q2 - the asm disk group is a group of disks, not really a logical volume. It combines the attributes of both when it is used for purposes of database as the database and some other applications know how to talk about Protocol 'ASM '. However, you won't find all the versatile applications that can do. In addition, some clients prefer to deal directly with files and devices of volume systems which ADVM is forced to make. In your thinking, you have 3 layers of logical disk, but each of them provides features and different attributes. This is not a bad thing, though, as each has a slightly different purpose - os file system\device, specific database and storage-centric.
Q3 - ADVM is specifically developed to extend the features of the DSO for use by General applications of BONE. It includes the performance of database features and is tuned to work well in this situation. Because it is developed in-house, it benefits from the design of ASM model. In addition, rather than having to communicate with several vendors for support, your support is limited to calling Oracle, a single window.
Q4 - you can create and modify filesystems ACFS by using command line tools and the ASMCA. Creation and modification of logical volumes coming through SQL (ASM), asmcmd and ASMCA. EM can also be used for the two elements. ACFS is located at the top of the ADVM, which is a file in an ASM disk group. ACFS is aware of the characteristics of the ASM\ADVM volumes and tunes it's IO make best use of these features.
Q5 - several ways:
1) connect to ASM with SQL, use 'alter diskgroup add volume' as Mihael points out. This creates an ADVM volume. Then, put in shape volume using the "mkfs" (* nix) or acfsformat (windows).
(2) use ASMCA - a GUI to create volume and a file system. Probably the easiest if your head is explosion.
(3) use "asmcmd" to create a volume and 'mkfs' to put in shape file ACFS system.
Here is information on the ASMCA, with examples:
http://docs.Oracle.com/CD/E16655_01/server.121/e17612/asmca_acfs.htm#OSTMG94348
Information about the command line tools, with examples:
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