ASM , TTS, and dataguard

I am going to be migrating from Itanium (hpux) san using serviceguard and VCS, to AMD (x86_64) with ASM, I know the endian type change, and I have gone through a test of converting the database and bringing the datafiles into ASM, and importing the metadata. All good.
The question I have is, when I bring them into ASM I create them with
convert datafile
'/disk1/dbs/my_tbs_f1.df',
'/disk1/dbs/my_tbs_f2.df'
format '+diskgroup';
I then look at ASM to find the correct name and bring them into the database with
TRANSPORT_DATAFILES=(
'+DISKGROUP1/tts/datafile/my_tbs_f1.300.672929651',
'+DISKGROUP1/tts/datafile/my_tbs_f2.286.672929651')
What is going to happen when I run this same convert datafile on the Physical standby ? will the datafiles have the same name, or how do I keep a standard name across my databases ?
My goal is to bring them into ASM on the primary and the physical standby, and have the oracle import them into both databases without reinstantiating.

What is going to happen when I run this same convert datafile on the Physical standby ? will the datafiles have the same name, or how do I keep a standard name across my databases ? The datafiles will not have same name. Raise an SR with oracle support for your issue.
[email protected]

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RAC and dataguard

With reference to this thread
is Dataguard and standby dbs is HA
RAC and DATAGAURD are two different approches for high availability and desaster recovery.
We are planning to implememt RAC and DATAGAURD but there are budget issues also.
With RAC As i understand we have multiple instances governing a single database. So multiple node/machines governing a single database server.
With DATAGAURD,we have a DR solution at another location.If the primary server fails,standby database takes up the role of primary.
With RAC alone,if any node fails, there is another node to do instance recovery or the server still continues. But what if database server crashes. WIth RAC alone and no dataguard, won't it allow downtime?

Hi Hashmi,
RAC and DataGuard are indeed different things, as you understood.
Regarding your question, there is no database server, that's the whole thing. There is one database (which resides on external redundant storage like Netapp, EMC, etc.) and there are several servers that are running the instances. Downtime will occur only if the storage crashes. And if you don't trust your storage you can have ASM redundancy, so storage failure will not cause downtime as well.
The down side, is that there is one database, so if you have logical corruption, human error, or something similar you can loose data or have downtime.
However, the high availability is real.
In DataGuard, once the primary is down it takes some time (not long) to activate the standby, but it has a different IP, so you should configure your DNS/clients (in advance or at failover) to connect to the activated standby.
HTH
Liron Amitzi
Senior DBA consultant
[www.dbsnaps.com]

Business continuity 11i and dataguard

Hi,
Is there a white paper/best practice for business continuity on 11i with single 10g instance and Dataguard solution? i've tried looking and cannot find and thing.
thanks
M.

Hi,
Please refer to:
Note: 403347.1 - MAA Roadmap for the E-Business Suite
Note: 464167.1 - Is Logical Standby Feature Supported For Oracle Applications Release 11i
Comparing Oracle Data Guard vs. Active Data Guard for EBS Environments
http://blogs.oracle.com/stevenChan/2008/10/comparing_oracle_data_guard_vs_active_data_guard_f.html
Regards,
Hussein

Separating ASM home and DATABASE home?

I just installed a new 2 node cluster on linux Itanium and I have configured my CLUSTERWARE_HOME and DATABASE_HOME. We are using ASM for our database storage and I had used dbca to create the ASM instances and when I ran the dbca to create the new ASM instance I used the dbca from the DATABASE_HOME.
I have been told that I should have created an additional home for the ASM instance? Is this correct and is this a best practice for RAC and ASM?
Everything is up and running fine and I and pondering if it is worth reconfiguring so that we can have a separate ASM home?
Is there a good doc out there concerning how to reconfigure the home for ASM once it is up and runnig and my database is currently utilizing it for it's storage?
I know that I would just have to lay down the binariies into a new directory but what alse needs to change? Will this affect how the ASM instances are registered with the clusterware?
What is the real benefit of having them separate? I have been told that you can patch then separately but I don't see the benefit as the db would have to be down anyhow if the ASM instance would need to be patched?
Any suggestions are greatly appreciated.
Thanks.

Hi,
<< Oracle Documentation >>
Keep the following in mind when installing ASM:
When running more than one database instance on a single server or node, it is recommended that you install ASM in its own Oracle home on that server or node. This is advisable even if you are running only one database instance but plan to add one or more database instances to the server or node in the future.
With separate Oracle homes, you can upgrade and patch ASM and databases independently, and you can deinstall database software without impacting the ASM instance.
If an ASM instance does not already exist and you select the OUI option to install and configure ASM only, OUI installs ASM in its own Oracle home.
If you are running a single database instance on a server or node and have no plans to add one or more database instances to this server or node, ASM and the database can share a single Oracle home
If an ASM instance does not already exist and you select the OUI option to create a database that uses ASM for storage, OUI creates this single-home configuration.
Have a look at the following documents:
1) ML NOTE:265633.1 ASM Technical Best Practices
2) http://julian.dyke.users.btopenworld.com/com/Blog/2007_01_01_archive.html
3) http://www.dell.com/downloads/global/solutions/Oracle_DB_Deployment_with_Separate_ASM_and_Database_Home_Final_Web_Ready.pdf
4) http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/storeman.htm#i1021337

How can validate the ASM size and free space correctly?

Dears ,,
I faced problem in ASM size as it appeared in alert file as below
ORA-19504: failed to create file "+DG_DATA"
ORA-17502: ksfdcre:4 Failed to create file +DG_DATA
ORA-15041: diskgroup space exhausted
So we resize ASM space and large it. But we faced the same problem also although there is free space in ASM.
It seems that the shown free space is not real.
How can validate the ASM size and free space correctly?
Thanks & Regards,,

*Oracle DBA* wrote:
Dears ,,
I faced problem in ASM size as it appeared in alert file as below
ORA-19504: failed to create file "+DG_DATA"
ORA-17502: ksfdcre:4 Failed to create file +DG_DATA
ORA-15041: diskgroup space exhausted
So we resize ASM space and large it. But we faced the same problem also although there is free space in ASM.
It seems that the shown free space is not real.
How can validate the ASM size and free space correctly?
Thanks & Regards,,
I was having this problem. Im my case i couldn add datafiles to a tablespace despite the fact that i was having a lot of space in the asm. Try rebalancing. It might help. In my case rebalancing also didn work because it seems that there need to be a threshold space in all the disks for the rebalancing to happen which was not in my case, so i had to shrink some unused space in the tablespace and then after gaining the required space I rebalanced the disk and then the disks got rebalanced, also i was able to use the free space that was showing .

Do we require two listeners. that is ASM listnener and DB listnener in oracle restart

Hi,
I have few question's on oracle restart.
1) Do we require two listeners. that is ASM listnener and DB listnener if yes why and if not what is the reason ?
2)If we add the components to OHASD,do we have to restart the services ?

Hi,
I don't get the point.
Listener don't hold connection but only redirect it to Instance, is the instance which create a session/process.
The use of listener is so small it's only for incoming connection, so after connection is established it is handled by Oracle Database process.
If you stop listener only incoming connection are affected, all current connection still alive on database.
1) ASM Connection is done only when someone try to connect at ASM remotely. It's pretty rare the use of it.
2) Does not matter if you are using ASM or DB Listener, ff you have a storm of connection incoming on its listener it should be avoided, in setting up the clients in a manner they don't open 100rds of connections at the same time - and with some listener.ora parameters.
Still see no reason to have two listener.

Standby and Dataguard

I'm new to DBA tasks.....and i supposed to setup Datagurad on oracle 9i
Bit confused with standby and dataguard, Could any one please expalin what is standby and what is dataguard, and the difference between two

http://download.oracle.com/docs/cd/B10501_01/server.920/a96653/concepts.htm#1027493

Oracle Streams and Dataguard

Does anyone know how to configure oracle streams and dataguard to work together? I've set up an environment which successfully captures and applies records in a streams environment using
log_archive_config=SEND, RECEIVE, NODG_CONFIG
as soon as I try to introduce the streams setup into a database which already has dataguard setup it begins to get convoluted as setting DG_CONFIG requires you to then set the db_unique_name and it seems that the streams log mining will not work without being fully incorporated into the Dataguard configuration.
Has anyone set up streams in a dataguard environment?

Lets see what's missing from your request:
1. Oracle version number?
2. Physical or logical Data Guard?
3. Which Data Guard mode? Synch or Asynch?
4. Which Data Guard protection level?
5. ARCH or LGWR?
6. Which streams mode? Synch or Asynch?
7. Hotlog or Autolog?
8. Streams on the production server or the standby server?
I'm all out of guesses tonight. Please provide enough information for someone to help you.

RMAN and Dataguard (10g)

Hi all,
I know this topic has been discussed several times over on this forum, but I have a peculiar situation.
I have just inherited a client system with 10g and DataGuard with RMAN. The standby is Physical and both nodes are on HP-UX version and patchsets.
The standby is persistently idle. The client insists on backing up the physical standby only.
My question is this, is there any danger in backing up on the physical standby?. I've argued the case that we should backup the Primary and Standby to no joy. I am a little worried that we may experience a failure on the primary and start a recovery with backup taken from the Standby node. Is this feasible at all?
Please confirm that I am right.
Regards,
Timothy.

Having a recovery catalog, there's a resync with the standby controlfile after the backup, the backup informations are now in the catalog. Now when you need to restore/recover the primary database you connect to this and to the catalog. Primary and standby are clones , so you access the same record in the catalog regardless whether you are connected to the primary or to the standby. Because of this a resync will refresh the primary controlfile with the backup records which were taken while connected to th standby. A simple backup/recovery example looks like this:
1) connect target sys/pwd@stdby catalog rman/pwd@rmancat
2) backup database; (resync happens automatically after this)
4) connect target sys/pwd@prim catalog rman/pwd@rmancat
5) resync catalog;
6) restore database;
7) recoverer database:
It's not mandatory, but recommended to backup the archivelogs on the primary side. Here you are sure to have all archivelogs (at least under regular circumstances). For many reasons it could happen, you miss some archives on the standby side.
It's possible to run a standby in read-only mode for reporting purposes. In this case archivelog applying is suspended. If you have such a situation it's not recommended to backup the standby database, possibly it does not change for a long time and in case of recovery you have to apply a large number of archivelogs.
Werner

Oracle10gRAC installation with ASM, SGeRAC and Oracle Clusterware on Ita64

Hello!
Does anyone have an installation guide for the configuration: Oracle10gRAC with ASM, SGeRAC and Oracle Clusterware on Itanium?
Thanks in advance, Mara

859875 wrote:
Thanks Fiedi. Thanks a lot for your response.
Last month I did RAC installation where I need format raw devices using below commands :
clean all
create part ext
create part log
Is it not required for standalone DB installation with ASM ?
Basically preparing disk for ASM on RAC or non RAC is the same
>
>
I am able to create 4 logical raw devices (175GB) each. 2 for Data and 2 for DB flash. However I am not able to clean those raw devices with "clean all" command.
Can you help me ?
what error did you get?. Try delete the logical partition and recreate it

Tnsnames configuration for RAC and dataguard

Hi everyone,
I have an environment with RAC and dataguard (production is RAC, standby is single instance) and I was wondering what is the best way to configure the clients (since I have quite a few and I don't want to change their tnsnames if I need to failover to the standby database).
Now, I need to have both RAC nodes of course, the question is what I should do with the standby...
The problems are:
1. If I add the standby as another address, 1/3 of the connections will get to it and I don't think it's a good idea
2. I can disable the load_balance, but then all connections will go to the first node's listener
3. After a failover, if the RAC nodes are down, it will take a long time to connect (the servers will not respond and the client will wait for timeout if it tries to connect to the RAC nodes first, only after the timeout it will try the standby and succeed)
Any ideas and suggestions will be appreciated.
Thanks,
Liron

Hi Robert,
I agree that the standby should be up, but you have to admit that if it is down it should not delay connections to the primary...
About the DNS, it's not that I don't trust the SA, but this is an environment for a customer so it should be as independent as it can be. So the failover process will be easy and fast. I don't know if I can get DNS permissions, but that's a good idea...
A question that can be derived from this:
assuming that I use observer to have an automatic failover, how should I configure my TNS? If the standby will become the primary automatically, I have to configure the clients to connect to the activated standby automatically. With no DNS changes or anything manual.
I guess in this case, my best option will be with LOAD_BALANCE=off, some of the clients will have RAC-NODE1 as first address and some will have RAC-NODE2, the standby will be the last address and we'll suffer the timeout if the primary will be down when connecting to the activated standby.
If anyone has other ideas, it would be great.
Thanks,
Liron

Oracle ASM installation and raw device options

I am looking to install Oracle ASM on Linux Red Hat AS 4 (ia64) using Oracle 10.2.0.3.
A general question I have regarding prerequisites for ASM using raw devices. It appears there are 2 options for dealing with RAW devices.
1. Use the ASM library driver
or
2. simply bind the devices to raw devices (and then install a new $OH with an ASM instance)
Is there a recommendation from Oracle, industry best practices, expert opinions on which way to go?
If I understand correctly it sounds like option 2 will require an ASM $OH and instance. Is that right or do both option require this?
Can someone provide guidance as to which option I should use, an Oracle whitepaper, a recommendation, instructions or something.
Any help or insight is provided as to which option I should use.
Thank you.
echardrd

OK. Perhaps I am a little condused then. From what I read Oracle ASM recommends the use of RAW devices for ASM storage devices. What I have is a new LUN presented to my database server from the SAN. I assumed that the LUN needs to be mounted in some fashion on the server, but my SA tells me in order to mount it, would require the use of a filesystem. If we put a filesystem(NTFS, ext, etc) on the LUN prior to mounting it, will ASM be able to use it? If ASM can use a device that has a filesystem on it will this add unneccessary overhead (I/O)?
I guess my question is for ASM should I
1. use a RAW partition or a filesystem? Does it matter?
2. Will RAW have better I/O performance?
3. How do i make the LUN presentation from the SAN a usable RAW device to my database server? Any steps or guidance would be helpful since my SA and I can not seem to bridge this gap.
Thanks.

Possible to create new ASM instance and "import" existing diskgroup?

This is my worst nightmare. Two days before a server was about to be shut down, it crashed on me, corrupting the filesystem where Oracle was installed. Setup was an HP-UX 11.11 server running Oracle 10g with ASM storage on a disk array. Both instances were in the filesystem that got corrupted, and amazingly, we don't have a backup, so I'm not able to restore the instance configs and restart the database. Presumably, my data is still sitting there on the disks that belong to the ASM diskgroup, but I don't know how to get at it. I started by creating a new ASM instance, but I can't figure out if there's a way to create a diskgroup out of those 16 disks without wiping out what's on them.
V$ASM_DISK shows all the disks as MEMBERs, with the CREATE_DATE that they were originally created, so I know at least the headers are intact. So is there any way I can manually recreate that diskgroup in my new instance so it will mount the disks and let me at the data?
I realize that not having backups is the height of stupidity, but that boat has sailed. My company also chose not to pay for Oracle Support this year, so I'm kind of on my own. If anybody can at least point me in the right direction or tell me that it's a lost cause, I'd appreciate it.

Well, a little progress. I was able to finally mount the disks in my new ASM instance, and using asmcmd, I can actually see my datafiles sitting there. So now I'm thinking I should try manually creating a new database instance pointing to the spfile that's in there and try starting that. I'm also going to try using RMAN and the XMLDB FTP trick to copy those datafiles somewhere else so I know I can play with them.

Infrastructure suggestion for Oracle RAC and Dataguard

Hello,
We are working on migration business proposal and need to suggest HA and DR infrastructure solution with Oracle 11G databases. I am thinking to suggest Oracle 11g RAC and Dataguard to meet this requirement. We also wanted to cover Dev, Test and Pre Prod along with Prod in new environment. Can someone suggest cost effective, stable and scalable infrastructure for this requirement
Best regards,
Venkat

In terms of cost ? Perhaps.
In terms of performance? NO.
Bear in mind I'm not trying to sell anything here, but in my experience hardly anything matches the performance of Exadata. It has specific features for the DB such as de iDB protocol which enables the offloading of queries to the exadata storage servers. More unique features include: storage indexes, HCC compression, smart flash cache... It's all a matter of how much you want to spend.
Yes, you can have all your servers on the same box if you want, just make sure it is not a single point of failure. (Have appropriate safeguards in place in case of power failure, Data center catastrophes, etc). In case of LPARs on the same box, be aware of one server over-utilizing resources which would affect the other LPARs (configurable).
More info on Exadata: http://www.oracle.com/technetwork/server-storage/engineered-systems/exadata/dbmachine-x3-twp-1867467.pdf
If your company has a tight budget you might also look at your options with Database appliance: http://www.oracle.com/technetwork/server-storage/engineered-systems/database-appliance/documentation/oracle-db-appliance…
Database appliance has more flexibility in terms of licensing and it's also a complete hardware solution from oracle for Databases.
Regards

TTS and JTAPI

Hello there:
I want to make an application that make calls to a external/ internal phone number (using Cisco CallManager 3.1), convert a text message to audio (TTS) and send it. What do I need to do this??, any one know some libraries and samples for use TTS and JTAPI??
Thanks for your help.

Hi,
I need a help to make use of TTS in JTAPI 1.4 version. As there is no sample program for this JTAPI 1.4 package, am facing an issue to write a program to play a wave file. Am using Freetts to convert the text file into wave file with 8000 hz frequency. But to play till now I've used usePlayURL method to play the file. But the voice is not clear & soft. So our team preferred to choose a better voice using some other TTS engine & also make a try of TTS in JTAPI 1.4. But the existing source files are just a body for all each interfaces in that package. Don't know to make use of the interface methods.
Kindly guide me to proceed my task.
Welcoming the suggestions....
Thanks & Regards,
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ASM , TTS, and dataguard

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