OCR and PowerShell

Can a PowerShell script be written to do OCR of the characters displayed on the screen?
Alternatively, can PowerShell assist in doing OCR of an image in the clipboard?

I'm not aware of any native OCR capability within powershell, but then it's all dotnet, is it not? or mostly, but with a bit of COM thrown in.
I think you'd need some OCR software that could be manipulated to do the job from powershell. Here's how one person leveraged office for this:
http://masterrex.com/?p=36
Al Dunbar -- remember to 'mark or propose as answer' or 'vote as helpful' as appropriate.

Similar Messages

OCR and voting disks on ASM, problems in case of fail-over instances

Hi everybody
in case at your site you :
- have an 11.2 fail-over cluster using Grid Infrastructure (CRS, OCR, voting disks),
where you have yourself created additional CRS resources to handle single-node db instances,
their listener, their disks and so on (which are started only on one node at a time,
can fail from that node and restart to another);
- have put OCR and voting disks into an ASM diskgroup (as strongly suggested by Oracle);
then you might have problems (as we had) because you might:
- reach max number of diskgroups handled by an ASM instance (63 only, above which you get ORA-15068);
- experiment delays (especially in case of multipath), find fake CRS resources, etc.
whenever you dismount disks from one node and mount to another;
So (if both conditions are true) you might be interested in this story,
then please keep reading on for the boring details.
One step backward (I'll try to keep it simple).
Oracle Grid Infrastructure is mainly used by RAC db instances,
which means that any db you create usually has one instance started on each node,
and all instances access read / write the same disks from each node.
So, ASM instance on each node will mount diskgroups in Shared Mode,
because the same diskgroups are mounted also by other ASM instances on the other nodes.
ASM instances have a spfile parameter CLUSTER_DATABASE=true (and this parameter implies
that every diskgroup is mounted in Shared Mode, among other things).
In this context, it is quite obvious that Oracle strongly recommends to put OCR and voting disks
inside ASM: this (usually called CRS_DATA) will become diskgroup number 1
and ASM instances will mount it before CRS starts.
Then, additional diskgroup will be added by users, for DATA, REDO, FRA etc of each RAC db,
and will be mounted later when a RAC db instance starts on the specific node.
In case of fail-over cluster, where instances are not RAC type and there is
only one instance running (on one of the nodes) at any time for each db, it is different.
All diskgroups of db instances don't need to be mounted in Shared Mode,
because they are used by one instance only at a time
(on the contrary, they should be mounted in Exclusive Mode).
Yet, if you follow Oracle advice and put OCR and voting inside ASM, then:
- at installation OUI will start ASM instance on each node with CLUSTER_DATABASE=true;
- the first diskgroup, which contains OCR and votings, will be mounted Shared Mode;
- all other diskgroups, used by each db instance, will be mounted Shared Mode, too,
even if you'll take care that they'll be mounted by one ASM instance at a time.
At our site, for our three-nodes cluster, this fact has two consequences.
One conseguence is that we hit ORA-15068 limit (max 63 diskgroups) earlier than expected:
- none ot the instances on this cluster are Production (only Test, Dev, etc);
- we planned to have usually 10 instances on each node, each of them with 3 diskgroups (DATA, REDO, FRA),
so 30 diskgroups each node, for a total of 90 diskgroups (30 instances) on the cluster;
- in case one node failed, surviving two should get resources of the failing node,
in the worst case: one node with 60 diskgroups (20 instances), the other one with 30 diskgroups (10 instances)
- in case two nodes failed, the only node survived should not be able to mount additional diskgroups
(because of limit of max 63 diskgroup mounted by an ASM instance), so all other would remain unmounted
and their db instances stopped (they are not Production instances);
But it didn't worked, since ASM has parameter CLUSTER_DATABASE=true, so you cannot mount 90 diskgroups,
you can mount 62 globally (once a diskgroup is mounted on one node, it is given a number between 2 and 63,
and other diskgroups mounted on other nodes cannot reuse that number).
So as a matter of fact we can mount only 21 diskgroups (about 7 instances) on each node.
The second conseguence is that, every time our CRS handmade scripts dismount diskgroups
from one node and mount it to another, there are delays in the range of seconds (especially with multipath).
Also we found inside CRS log that, whenever we mounted diskgroups (on one node only), then
behind the scenes were created on the fly additional fake resources
of type ora*.dg, maybe to accomodate the fact that on other nodes those diskgroups were left unmounted
(once again, instances are single-node here, and not RAC type).
That's all.
Did anyone go into similar problems?
We opened a SR to Oracle asking about what options do we have here, and we are disappointed by their answer.
Regards
Oscar

Hi Klaas-Jan
- best practises require that also online redolog files are in a separate diskgroup, in case of ASM logical corruption (we are a little bit paranoid): in case DATA dg gets corrupted, you can restore Full backup plus Archived RedoLog plus Online Redolog (otherwise you will stop at the latest Archived).
So we have 3 diskgroups for each db instance: DATA, REDO, FRA.
- in case of fail-over cluster (active-passive), Oracle provide some templates of CRS scripts (in $CRS_HOME/crs/crs/public) that you edit and change at your will, also you might create additionale scripts in case of additional resources you might need (Oracle Agents, backups agent, file systems, monitoring tools, etc)
About our problem, the only solution is to move OCR and voting disks from ASM and change pfile af all ASM instance (parameter CLUSTER_DATABASE from true to false ).
Oracle aswers were a litlle bit odd:
- first they told us to use Grid Standalone (without CRS, OCR, voting at all), but we told them that we needed a Fail-over solution
- then they told us to use RAC Single Node, which actually has some better features, in csae of planned fail-over it might be able to migreate
client sessions without causing a reconnect (for SELECTs only, not in case of a running transaction), but we already have a few fail-over cluster, we cannot change them all
So we plan to move OCR and voting disks into block devices (we think that the other solution, which needs a Shared File System, will take longer).
Thanks Marko for pointing us to OCFS2 pros / cons.
We asked Oracle a confirmation that it supported, they said yes but it is discouraged (and also, doesn't work with OUI nor ASMCA).
Anyway that's the simplest approach, this is a non-Prod cluster, we'll start here and if everthing is fine, after a while we'll do it also on Prod ones.
- Note 605828.1, paragraph 5, Configuring non-raw multipath devices for Oracle Clusterware 11g (11.1.0, 11.2.0) on RHEL5/OL5
- Note 428681.1: OCR / Vote disk Maintenance Operations: (ADD/REMOVE/REPLACE/MOVE)
-"Grid Infrastructure Install on Linux", paragraph 3.1.6, Table 3-2
Oscar

OCR and Extract

Hi,
I have two questions:
1) When I try to "Recognize Text Using OCR" a document (which is a collection of scanned images of invoices), the result is extremely poor, with most of characters not being recognized at all. The image quality is not great, but I have been able to obtain better results by a) printing an invoice and scanning it with OCR; and b) using Able2Extract from www.ocr.com. However, a) would take too long and b) doesn't seem to have the option of saving OCRed pages as PDF.
My question is: is it possible to OCR a lower quality PDF more reliably in Acrobat. If not, is there another software that can do this?
2) Is it possible to extract pages that satisfy certain conditions? For example, can you extract all pages that contain any kind of notes or markings (e.g. Acrobat highlights) or pages that contain certain words?
Thanks in advance your assistance.

An answer to question 2 is a conditional yes. The condition is that you have a version which is not Reader (which I assume you do), and also you will need a custom-made script that will determine which pages to extract. Contact me by email if you're interested in such a tool.

How to examine pdf for image file formats, OCR, and layers

Hi,
I have a question about how to find out specific features of a pdf. I am using Adobe Acrobat 9 Pro for windows.
With any given PDF, I am looking to find out:
a] The specs of any image files used to create the pdf (i.e., if the pdf is made up of text pages with image objects on top of them, are those image objects JPGs? TIFFS? What resolution are they? Are they compressed?)
b] Does this PDF have OCR already embedded in it?
c] Does this PDF have multiple layers?
with a] -- file format is perhaps the most important, resolution and compression being second most
with c] -- is there an easy way to see the layers, visually, on the page images?
What is a smiple way to find out this information?
I've poked around a bit in the "Examine Document" function, and various checks in "Preflight," as well as the help manual, and have found bits and pieces that look like some of what I'm looking for, but nothing simple or conclusive yet.
Any help or advice would be wonderful! I just want a simple way to be able to see what my PDF is made out of, in terms of image files, OCR, and layers.
Thanks,
Andrew

Preflight is inded the best way to do this operation. You may have to read a bit to figure out what you are looking at, but that is the right route to take.

How do I define 2 disk groups for ocr and voting disks at the oracle grid infrastructure installation window

Hello,
It may sound too easy to someone but I need to ask it anyway.
I am in the middle of building Oracle RAC 11.2.0.3 on Linux. I have 2 storage and I created three LUNs in each of storage so 6 LUNs in total look in both of servers. If I choose NORMAL as a redundancy level, is it right to choose my 6 disks those are created for OCR_VOTE at the grid installation? Or should I choose only 3 of them and configure mirroring at latter stage?
The reason why I am asking this is that I didn't find any place to create asm disk group for ocr and voting disks at the oracle grid infrastructure installation window. In fact, I would to like to create two disk groups in which one of groups contains three disks those were brought from storage 1 and the second one contains rest three 3 disk that come from the last storage.
I believe that you will understand the manner and help me on choosing proper way.
Thank you.

Hi,
You have 2 Storage H/W.
You will need to configure a Quorum ASMDisk to store a Voting Disk.
Because if you lose 1/2 or more of all of your voting disks, then nodes get evicted from the cluster, or nodes kick themselves out of the cluster.
You must have the odd number of voting disk (i.e 1,3 or 5) one voting disk per ASM DISK, So 1 Storage will hold more voting disk than another storage.
(e.g 3 Voting Disk - 2 voting stored in stg-A and 1 voting disk store in stg-B)
If fail the storage that hold the major number of Voting disk the whole cluster (all nodes) goes down. Does not matter if you have a other storage online.
It will happen:
https://forums.oracle.com/message/9681811#9681811
You must configure your Clusterware same as RAC extended
Check this link:
http://www.oracle.com/technetwork/database/clusterware/overview/grid-infra-thirdvoteonnfs-131158.pdf
Explaining: How to store OCR, Voting disks and ASM SPFILE on ASM Diskgroup (RAC or RAC Extended) | Levi Pereira | Oracl…

Confusion with OCFS2 File system for OCR and Voting disk RHEL 5, Oracle11g,

Dear all,
I am in the process of installing Oracle 11g 3 Node RAC database
The environment on which i have to do this implementation is as follows:
Oracle 11g.
Red Hat Linux 5 x86
Oracle Clusterware
ASM
EMC Storage
250 Gb of Storage drive.
SAN
As of now i am in the process of installing Oracle Clusterware on the 3 nodes.
I have performed these tasks for the cluster installs.
1. Configure Kernel Parameters
2. Configure User Limits
3. Modify the /etc/pam.d/login file
4. Configure Operating System Users and Groups for Oracle Clusterware
5. Configure Oracle Clusterware Owner Environment
6. Install CVUQDISK rpm package
7. Configure the Hosts file
8. Verify the Network Setup
9. Configure the SSH on all Cluster Nodes (User Equivalence)
9. Enable the SSH on all Cluster Nodes (User Equivalence)
10. Install Oracle Cluster File System (OCFS2)
11.Verify the Installation of Oracle Cluster File System (OCFS2)
12. Configure the OCFS2 (/etc/ocfs2/cluster.conf)
13. Configure the O2CB Cluster Stack for OCFS2
BUT, here after i am a little bit confused on how to proceed further. The next step is to Format the disk and mount the OCFS2, Create Software Directories... so and so forth.
I asked my system admin to provide me two partitions so that i could format them with OCFS2 file system.
He wrote back to me saying.
*"Is what you want before I do it??*
*/dev/emcpowera1 is 3GB and formatted OCFS2.*
*/dev/emcpowera2 is 3GB and formatted OCFS2.*
*Are those big enough for you? If not, I can re-size and re-format them*
*before I mount them on the servers.*
*the SAN is shared storage. /dev/emcpowera is one of three LUNs on*
*the shared storage, and it's 214GB. Right now there are only two*
*partitions on it- the ones I listed below. I can repartition the LUN any*
*way you want it.*
*Where do you want these mounted at:*
*/dev/emcpowera1*
*/dev/emcpowera2*
*I was thinking if this mounting techique would work like so:*
*emcpowera1: /u01/shared_config/OCR_config*
*emcpowera2: /u01/shared_config/voting_disk*
*Let me know how you'd like them mounted."*
Please recommend me what i should convey to him so that i can ask him to the exact same thing.
My second question is, as we are using ASM, for which i am gonna configure ASM after clusterware installation, should i install Openfiler??
Pls refer the enviroment information i provided above and make recommendations.
As of now i am using Jeffery Hunters guide to install the entire setup. You think the entire install guide goes well with my enviroment??
http://www.oracle.com/technology/pub/articles/hunter_rac11gr1_iscsi.html?rssid=rss_otn_articles
Kind regards
MK

Thanks for ur reply Mufalani,
You have managed to solve half part of my query. But still i am stuck with what kind of mount point i should ask the system admin to create for OCR and Voting disk. Should i go with the mount point he is mentioning??
Let me put forth few more questions here.
1. Is 280 MB ok for OCR and voting disks respectively??
2. Should i ask the system admin to create 4 voting disk mount points and two for ocr??
3. As mentioned by the system admin.
*/u01/shared_config/OCR_config*
*/u01/shared_config/voting_disk*
Is this ok for creating the ocr and voting disks?
4. Can i use OCFS2 file system for formating the disk instead of using them as RAW device!!?
5. As u mentioned that Openfiler is not needed for Configuring ASM... Could you provide me the links which will guide me to create partition disks, voting disks and ocr disks!! I could not locate them on the doc or else were. I did find a couple of them, but was unable to identify a suitable one for my envoirement.
Regards
MK

About OCR and Vote Disk size

Hallo,
I have a simple question about OCR and Vote Disk in a 10g/11g RAC setup:
official documentation speaks about sizing OCR and Vote Disk about 280 MB, but do they mean each OCR and Vote disk LUN ?
In other words, for 2 OCR and 3 Vote disk I need 280*5 MB ( in multiple o single LUN)
Is it so?
thx in advance

ottocolori wrote:
Hallo,
I have a simple question about OCR and Vote Disk in a 10g/11g RAC setup:
official documentation speaks about sizing OCR and Vote Disk about 280 MB, but do they mean each OCR and Vote disk LUN ?
In other words, for 2 OCR and 3 Vote disk I need 280*5 MB ( in multiple o single LUN)
Is it so?
thx in advanceYes. Also see Re: Reduce size of OCR file

Move OCR and Vote Disk to a new SAN

Hi,
Can you guys help me with some links/documents for moving OCR and Vote disk files from old SAN to new SAN.
Both SAN will have ocfs2 formatted 3 partitions on which ocr and votedisk will be placed (normal redundancy).
Oracle version 11g R2,
OS linux 5.5
RAC nodes : 2
Datafiles on ASM
OCR/Votedisk on ocfs2
Regards,
Ajay

user7443016 wrote:
Thanks for the reply, but all the examples were showing either ocfs2 to ASM or raw to ocfs2. could you just point out the high level steps for moving 3 ocr & votedisk files from one san to another(ocfs to ocfs).
Hi Ajay,
Steps will be same . It doesnt matter whether it is raw to ocfs2 or ocfs to ocfs.
There will be change only how do you assign storage for OCR/voting disk.
I have another doubt that, i already have 3 ocr files, can i add more ocr files pointing to another mount point? the same goes with votedisk.
You can use replace option so there is no need to add 4th OCR disk.
i found steps in one of the website: i have few doubts in it, could any one clarify it...All the steps seems to be fine.
Moving OCR
1) create mount point(new san - /u05) in all nodes
2) precreate ocr files in new mount points (i am not sure how to do it? is it just touch and filename, its a ocfs2 file system)on ocfs you need to create file as below :
dd if=/dev/zero of=/ocfs/OCR/ocrnew.dbf bs=1M count=128
Also I would suggest to have a look at :
'ocrconfig -replace ocr' Fails With PROT-16 [ID 444757.1]
RAC Assurance Support Team: RAC Starter Kit and Best Practices (Linux) [ID 811306.1]
Regards
Rajesh

Ocr and mirror ocr files

hi gurus,
what is the difference between ocr actual file and ocr mirror file. as i know ocr mirror is nothing but ocr copy. is there any much difference b/w these files.
but while recovering ocr file can we use ocr mirror file.

what is the difference between ocr actual file and ocr mirror file. as i know ocr mirror is nothing but ocr copy. is there any much difference b/w these files.yes it is a mirror copy of ocr disk. no difference.
you can check it by command ---- ocrcheck
in 10gR1 only one ocr disk
in 10gR2 one ocr and one ocr mirror disk(optional also recommended by oracle)
in 11gR1 onwards, one ocr and five ocr mirror disk(optional)
but while recovering ocr file can we use ocr mirror file.yes
refer:-
Administering Oracle Clusterware Components
http://download.oracle.com/docs/cd/B19306_01/rac.102/b14197/votocr.htm

OCR and Voting Disk partition

Dear all
I uninstall clusterware. And i want to install again that but when i made partition in windows 2003 then CVU fail the stage command.
I did the following things..
1) diskpart --->select Disk 1----> clean -->exit (both the nodes)
2) diskpart -->automount enable--->exit ---> restart (both the nodes)
3) Then i make four partition in one node. And see after restart node 2 have that partition with drive letter. I remove all the drive letter.
But CVU stage command failed. And if i run clusterware then it can get partition which has not previous OCR and voting. I think previous OCR and Voting disk could not clean.
Could u pls tell me how can i get solution.
Moinul

Check Metalink for this problem area ! Raise TAR

OCR and Voting Disk Migration to new media

Hello,
We need to move OCR,voting disk and ASM from one storage media to another .I think ASM related files are very easy to move/re map but how OCR and Voting Disk files will be migrated to the new storage media?
Thanks,
S.Mann

Hi,
when you said:
"Move Voting Disk : run as root.
crsctl query css votedisk
crsctl add css votedisk new_backup_san_device
crsctl query css votedisk - Make sure the new device is added
crsctl delete css votedisk current_san_device_to_be_encrypted
crsctl query css votedisk - Make sure that the old one is removed "
I supose the new_backup_san_device could be a raw device??
In my system I have a 2 nodes cluster, oracle 10gR2, RAC and ASM
the ocr and voting disk are stored in /dev/raw/raw1 and /dev/raw/raw2
thoses 2 raw devices are mapped with LUNS in the first storade media.
We are about to change it..
So what must I do at this step? What are the logical steps I must done?
add the new LUNS in the nodes and map it as raw devices?
I have this at the moment:
crw-r----- 1 root oinstall 162, 1 Feb 8 17:33 /dev/raw/raw1
crw-r----- 1 root oinstall 162, 2 Feb 8 17:33 /dev/raw/raw2
crw-r----- 1 oracle oinstall 162, 3 Feb 8 17:33 /dev/raw/raw3
in the case of migration, I must add 3 new row devices?
as this?
crw-r----- 1 root oinstall 162, 1 Feb 8 17:33 /dev/raw/raw1
crw-r----- 1 root oinstall 162, 2 Feb 8 17:33 /dev/raw/raw2
crw-r----- 1 oracle oinstall 162, 3 Feb 8 17:33 /dev/raw/raw3
crw-r----- 1 root oinstall 162, 1 Feb 8 17:33 /dev/raw/raw4
crw-r----- 1 root oinstall 162, 2 Feb 8 17:33 /dev/raw/raw5
crw-r----- 1 oracle oinstall 162, 3 Feb 8 17:33 /dev/raw/raw6
That's it?
Thanks to help

OCR and Voting Disk Mirror

Hi,
We have oracle 10.2.0.4 RAC database. Now we are planning to mirror the OCR and Voting disk. Currently we are using SAN mirror copy. SAN admin assures that we don't need mirror copy as it is being mirrored at the disk level. Can any one please suggest me if we need any mirror copy of these. If so what advantages I get from the regular SAN copy.

You use SAN or High Availability Storage + RAID. You don't need to mirror OCR/VOTING .
Anyway , If you can do it... Mirror OCR + Multi VOTING... , that's good thing oracle recommend.
By the way, If you can not mirror OCR + multi VOTE on 10g, You should backup VOTE File ("dd" linux command) after setup completed/add node/delete node.
http://download.oracle.com/docs/cd/B19306_01/rac.102/b28759/adminoc.htm#sthref148
And Check OCR file automatic backup:
$ ocrconfig -showbackup
http://download.oracle.com/docs/cd/B19306_01/rac.102/b14197/ocrsyntax.htm

OCR and votingdisk

I believe that voting disk and CRS has to be raw devices..
can we create OCR and votingdisk in directories.
in RAC ?
check here
db1:/oradata/d01/CRS$ crsctl query css votedisk
0. 0 /oradata/d01/CRS/VOTE
1. 0 /oradata/d01/CRS/VOTE
2. 0 /oradata/d01/CRS/VOTE
located 3 votedisk(s).
VOTE
is the name of the voting disk.. where they've created this disk in the directory ccbs/oradata/u01/CRS
am wondering how ?
this is in solaris ?
any idea ?
I cannot find any symbolic links here als
Please guide
kai

Hai Ashok,
Yes we are using OCFS only... thanks for the info... I understand that if you are not formatting with OCFS, (ie.ASM) then you have to use OCR and VOTE DISK as raw device only right ?..If using OCFS,we can have OCR and votedisk in directories.. can u refer me some links to understand this RAC concepts well ?
Hai Chandra,
Thanks for the reply. yes they are OCR and voting disk only and they are updated every minute. yes.. crsctl query css votedisk displays the output and I understand by this command what are the configured voting disk that we have...is there any command to check the OCR like this ?..in Otherwords I want to display all the configured and mirrired ocr's.. any commands to display that ??
thanks for helping pal s
Kai

OCR and Voting disk SAN config

Hi,
On our standard SAN configuration I normally use RAID 1 for the OCR and Voting disk raw devices. I'm working with a site that has only RAID 5 for their entire SAN. Will RAID 5 be acceptable for the OCR and Voting disk devices?

Hi,
Yes, you can use it.
It is better to use RAID 1+0, instead of RAID-5.
OCR and voting disks takes very less space, So you can request to change RAID-5 (OCR and voting) disks to RAID 1+0 (OCR and voting) disks.
Changing form RAID-5 to RAID 1+0 may not be require any downtime.
Thanks.
Abdul Rajak
Message was edited by:
Rajak
Message was edited by:
Rajak

Ocr and voting file heth

Hi gurus,
is there any method to check health of the ocr and voting files. How do we know that if ocr or voting files are corrupted.
Thank you!

returns an individual status for each file as well as a result for the overall OCR integrity check. The following is a sample of the OCRCHECK output:
$ pwd
/u01/db/crs/10.2.0/bin
$ ocrcheck
Status of Oracle Cluster Registry is as follows :
         Version                  :          2
         Total space (kbytes)     :    1049004
         Used space (kbytes)      :      15948
         Available space (kbytes) :    1033056
         ID                       : 941199149
         Device/File Name         : /dev/rhdiskpower52
                                    Device/File integrity check succeeded
                                    Device/File not configured
         Cluster registry integrity check succeeded
The following ocrdump utility examples extract various types of OCR information and write it to various targets:
ocrdump
Writes the OCR content to a file called OCRDUMPFILE in the current directory.
ocrdump MYFILE
$ ocrdump
$crsctl query css votedisk
and also using cluvfyrefer the link:-http://download.oracle.com/docs/cd/B19306_01/rac.102/b14197/appsupport.htm#BEHBHFJB

OCR and PowerShell

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