In high availability Active-Active or Active-Passive is VPN supported

My question is as simple as the title!
Let me know.
Regards!

it is active/active per virtual context but certain not active/active within a particular context.
I will give you an example. let say you have 192.168.1.0/24 and 192.168.2.0/24 and for the sake of the argument, you have 100Mbps on both ASA1 and ASA2 and that the network 192.168.1.0/24 and 192.168.2.0/24 is 1Gbps link.
Now let say that 192.168.1.0/24 needs to access 1.1.1.1 and ASA1 is active for .1.0/24 and ASA2 and standby for .1.0/24 and vice versa for .2.0/24. let assume that there are very little traffics on network 192.168.2.0/24.
based on cisco definition of active/active, you will max out @100Mbps on 192.168.1.0/24 getting to 1.1.1.1 on ASA1 while ASA2 is just sitting idle. For a true active/active, I should get 200Mbps.
that's why I said "Active/Active" in Cisco is kinda mis-leading... That's why you need to read the fine print

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Hello Gurus,
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Thanks.

Hi;
We have the below environment:
Oracle Applications - 12.1.3
Oracle Database - 11.2.0.3
OS - Oracle Enterprise Linux 5.7
I would like to know how to achieve high availability (*Active/Passive*) for the database. We don't want to go with RAC at this stage. Can you please guide on a specific note id which explains how to setup an active passive database environment for HA.You can go with Dataguard. Please review:
Business Continuity for Oracle E-Business Release 12 Using Oracle 11g Physical Standby Database [ID 1070033.1]
Also see:
MAA Roadmap for the E-Business Suite [ID 403347.1]
Regard
Helios

SAP PI 7.1 High Availability, Active-Active or Active-Passive

We are planning go to HA system for PI 7.11
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Hi Sagar,
Please use Active-Passive for your SAP PI 7.1 High Availability system.
For more details, please refer to the sdn link:
High Availability
->High Availability FAQ
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An active-active cluster consists of two independent server nodes at a minimum. The workload within a cluster resource is shared between the server nodes. If a cluster node crashes the processes are resumed by the remaining cluster nodes. An active-active cluster configuration means that a cluster resource is active on all cluster nodes. The aim of an active-active cluster is not only to provide high availability system but to distribute the workload between the cluster nodes. Applications with a very high workload like databases benefit from an active-active setup. Due to the SAP Central Services Instance is a light component an active-active setup does not make any sense. Therefore the SCS is implemented as an active-passive cluster resource.
Best Regards
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SOA Suite - Active/Passive HA

Dear All,
Need your guidance in configuring Oracle SOA suite with ESB to make it highly available (Active / Passive) . Have gone through one document but its only showing Active/Active configuration.
Is there any step by step doc for this.
Regards,

Thanks for update Taylor.I'm following from below URL:
http://download.oracle.com/docs/cd/B31017_01/core.1013/b28941/toc.htm
We need to install SOA suite with ESB,but the mentioned document doesnt give any scenerio for Active/Passive configuration for SOA.
I want to know how we'll distribute the software components on each node/shared storage for an Active/Passive topology, so in case of node failure , other node can take over.Currently we've installed following on a single node.
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ASA 5520: Configuring Active/Standby High Availability

Hi,
I am new to Cisco firewalls. We are moving from a different vendor to Cisco ASA 5520s.
I have two ASA 5520s running ASA 8.2(5). I am managing them with ASDM 6.4(5).
I am trying to setup Active/Standby using the High Availability Wizard. I have interfaces on each device setup with just an IP address and subnet mask. Primary is 10.1.70.1/24 and secondary is 10.1.70.2/24. The interfaces are connected to a switch and these interfaces are the only nodes on this switch. When I run the Wizard on the primary, configure for Active/Standby, enter the peer IP of 10.1.70.2 and I get an error message saying that the peer test failed, followed by an error saying ASDM is temporarily unable to connect to the firewall.
I tried this using a crossover cable to connect the interfaces directly with the same result.
Any ideas?
Thanks.
Dan

The command Varun is right.
Since you want to know a little bit more about this stuff, here goes a bit. Every interface will have a secondary IP and a Primary IP where the Active/Standby pair will exchange hello packes. If the hellos are not heard from mate, the the unit is delcare failed.
In case the primary is the one that gets an interface down, it will failover to the other unit, if it is the standby that has the problem, the active unit will declare the other Unit "standby failed). You will know that everything is alright when you do a show failover and the standby pair shows "Standby Ready".
For configuring it, just put a secondary IP on every interface to be monitored (If by any chance you dont have an available secondary IP for one of the interfaces you can avoid monitoring the given interface using the command no "monitor-interface nameif" where the nameif is the name of the interface without the secondary IP.
Then put the commands for failover and stateful link, the stateful link will copy the connections table (among other things) to avoid downtime while passing from One unit to another, This link should have at least the same speed as the regular data interfaces.
You can configure the failover link and the stateful link in just one interface, by just using the same name for the link, remember that this link will have a totally sepparate subnet from the ones already used in firewall.
This is the configuration
failover lan unit primary
failover lan interface failover gig0/3
failover link failover gig0/3
failover interface ip failover 10.1.0.1 255.255.255.0 standby 10.1.0.2
failover lan unit secondary
failover lan interface failover gig0/3
failover link failover gig0/3
failover interface ip failover 10.1.0.1 255.255.255.0 standby 10.1.0.2
Make sure that you can ping each other secondary/primary IP and then put the command
failover first on the primary and then on the secondary.
That would fine.
Let me know if you have further doubts.
Link for reference
http://www.cisco.com/en/US/products/ps6120/products_configuration_example09186a008080dfa7.shtml
Mike

Oracle Active / Passive Cluster Installation

Hi everybody,
I have searched a lot about installation of Active / Passive Cluster installation in Oracle on Linux, neverthless nowehere I found it.
Can anyone help me to install it or send me any documentation about it from start to end.

Hi,
if you are talking to a High Availability feature in OAS 11g then check the following document.
Reference
http://www.oracle.com/technetwork/database/features/availability/maa-edg-frd-129690.pdf
Regards Roberto

Active Passive Vs Active Active

Hi All,
How much more effort it requires to failover or get up and ready with passive node, if Active Passive strategy is followed rather than Active Active just for saving on licenses.
Note : High availability is not a concern.
thanks,

Be clear what the policy means. RAC is normally considered an ACTIVE/ACTIVE solution since all nodes in RAC are actively processing. In an ACTIVE/PASSIVE setup by contrast one or more nodes are actively processing whilst others are standing by ready to take over the workload in the event of failure of the primary. Physical Standby, Failsafe and non-oracle clusters are often Active/Passive. You may also check if the policy comes from a sqlserver centric view of the world where you split the sqlserver databases between different nodes, so that although for any given sql database the solution is active passive, you don't 'waste' the resources of some nodes just waiting to take over, but rather run other databases on them.
Your description of ACTIVE/ACTIVE seems to rather correspond to a Stretch Cluster http://www.oracle.com/technology/deploy/availability/pdf/1126_Ray_WP.pdf has a good overview of what this means. I'd be surprised if the policy was really to put all databases on just about the most expensive hardware and software solution available, but I'm used to surprises in the world of corporate policies.
Niall
user526463 wrote:
My company was recently purchased. The new company has a "policy" about any High Availability database be an Active\Active configuration. We have in the past used active\passive RAC installs with each site have multiple active RAC nodes. I am interested in see what the cases are for a true Active\Active environment where there will be multiple RAC nodes in each "cluster" and multiple databases (disk) which are actively written to, then synchronized. (As apposed to a couple mutinode RAC setups with a primary\standby database)
Any white papers or best practice document references would be great. I'd hate to do this just case of some policy.
Thanks

Active\Active vs Active\Passive

My company was recently purchased. The new company has a "policy" about any High Availability database be an Active\Active configuration. We have in the past used active\passive RAC installs with each site have multiple active RAC nodes. I am interested in see what the cases are for a true Active\Active environment where there will be multiple RAC nodes in each "cluster" and multiple databases (disk) which are actively written to, then synchronized. (As apposed to a couple mutinode RAC setups with a primary\standby database)
Any white papers or best practice document references would be great. I'd hate to do this just case of some policy.
Thanks

Be clear what the policy means. RAC is normally considered an ACTIVE/ACTIVE solution since all nodes in RAC are actively processing. In an ACTIVE/PASSIVE setup by contrast one or more nodes are actively processing whilst others are standing by ready to take over the workload in the event of failure of the primary. Physical Standby, Failsafe and non-oracle clusters are often Active/Passive. You may also check if the policy comes from a sqlserver centric view of the world where you split the sqlserver databases between different nodes, so that although for any given sql database the solution is active passive, you don't 'waste' the resources of some nodes just waiting to take over, but rather run other databases on them.
Your description of ACTIVE/ACTIVE seems to rather correspond to a Stretch Cluster http://www.oracle.com/technology/deploy/availability/pdf/1126_Ray_WP.pdf has a good overview of what this means. I'd be surprised if the policy was really to put all databases on just about the most expensive hardware and software solution available, but I'm used to surprises in the world of corporate policies.
Niall
user526463 wrote:
My company was recently purchased. The new company has a "policy" about any High Availability database be an Active\Active configuration. We have in the past used active\passive RAC installs with each site have multiple active RAC nodes. I am interested in see what the cases are for a true Active\Active environment where there will be multiple RAC nodes in each "cluster" and multiple databases (disk) which are actively written to, then synchronized. (As apposed to a couple mutinode RAC setups with a primary\standby database)
Any white papers or best practice document references would be great. I'd hate to do this just case of some policy.
Thanks

Active/passive replication

Hi,
I cannnee find a sufficiently detailed breakdown of the exact features within each license version of 10g. Can someone tell me if the standard edition of 10g provides the ability to setup up an active/passive replication between two completely separate machines? From what I can see this is only available in the enterprise edition through the data guard feature. It would be annoying that such a basic replication feature is not available outside of the high price version.
Thanks,
Sam

Hi,
I cannnee find a sufficiently detailed breakdown of the exact features within each license version of 10g. Can someone tell me if the standard edition of 10g provides the ability to setup up an active/passive replication between two completely separate machines? From what I can see this is only available in the enterprise edition through the data guard feature. It would be annoying that such a basic replication feature is not available outside of the high price version.
Thanks,
Sam

Oracle Grid Infrastructure: Active/passive Clusters

Full blown RAC instances are still relatively rare. Maybe the high costs are one of the main reasons for this. Anyway, many SAP/Oracle installations don't really require a fault tolerant database. A simple automatic failover in an active/passive cluster would be sufficient.
In the book "Oracle Database 11g RAC on Linux" I found a very interessting comment on page 28:
A little known fact is that using Oracle Grid Infrastructure makes it very simple to set up a cost effective active/passive cluster. Leveraging the Grid Infrastructure API and Oracleu2019s Automatic Storage Management as a cluster logical volume manager makes it easy to constantly monitor a single instance Oracle database. In case of a node failure, the database will automatically be relocated to the standby node. Depending on the fast_start_mttr_target initialization parameter and the size of the recovery set, the failover to the standby node can be very quick; however, users will be disconnected from the database as part of the failover process.
Now I have two questions:
1. If I want to create a proof of concept, where do I start? I already had a look at the Oracle 11g documentation, but in the documentation "cluster" equals "RAC".
2. It is not sufficient to perform only a database failover. We need to handle the SAP system as well. Is it supported by SAP to put /usr/sap/SID and /sapmnt/SID into ASM 11.2 and present them e.g. as ASM cluster file systems?
Regards,
Mark

Hello Stefan,
we are both on one line. I would also prefer a simple active-passive cluster setup to a full blown RAC or even a RAC One Node. especially if the license fee for Clusterware is significantly lower than for RAC. However, Oracle staff makes it really clear that Oracle does not want customers to implement active-passive clusters based on Clusterware without RAC. They even say this active-passive cluster is no longer supported on 11.2. by Oracle! Of course it worked fine with 11.1 and there is no reason why it should be technically no longer possible with 11.2. WIth this adverse winds from Oracle blowing in our face, it doesn't make sense to implement such a active-passive cluster any more, however elegent it might have been technically.
So let's see what the alternatives are and when RAC One Node will be available (and at what price!).
Regards,
Mark

Can you Setup a Active Passive DFS namespace in the same site

Hi,
I would like to use DFS for profile replication. I know MS doesn't recommend it, but was wondering if you could setup DFS namespace in an Active/ passive contests in the same AD site. I think or what I can understand of DFS is that if the Fileserver is in
the same site it would select it randomly and you cant specify which server is the primary.
Basically what I want is to have users only access File server 1, but if this file server 1 goes down to be redirected to file server 2.
Thanks,
Shaun

You could have a read-only Replica but that really doesn't help you in terms of the automatic redirection thing. You could also set up a 2-node replication group and disable the referral for the folder(s) on one node like below:
However the "failover" would be manually Enabling, which I doubt fits the bill.
Otherwise, I'm not aware of any configuration of DFSR that allows you to do what you're talking about (maybe someone else will correct me.) HOWEVER, I suspect a design that fits your use case may be to create a DFS namespace that runs
on a file server cluster. That way if Node1 goes down, the cluster fails over, and the data continues to be available on Node2 when accessed via DFS.
If interested, there are a couple ways to approach DFS in combination with a cluster.
Configuration1: The cluster is configured to host the namespace as well as the folder targets (where the actual data is). CAVEAT - The cluster can only be configured as a standalone cluster.
Configuration2: Create a domain DFS namespace that resides on other servers.
\\domain\DFSRoot for example. Then point each of the leaves/folder targets to clustered shares. So you'd create a subfolder called "Profiles" that points to the clustered share that houses the profiles.
Just an idea. Hope this helps.

Error with concurrent users- Activation Passivation Bind variable ?

I have a programmatic view object based on procedure call that returns a ref cursor.
Application Module has a function that exposes get Method for this View object using client interface.
Everything works good until many users call the same Method ,for many concurrent users i got the below error intermittently :
JBO-27122: SQL error during statement preparation.
Attempt to set a parameter name that does not occur in the SQL: bussId
For 1 or 2 users this works perfectly fine.
bussId is a bind variable defined at View object of type Array.
I understand this should be because of activation/passivation as many users calling same function comes to picture.
To solve this I overloaded activateState/passivateState in View implementation for the bind var.
But i don't see those methods getting invoked ever.
I also enabled connection pool/AM pool and kept the default pool values high enough for concurrent users.
Nothing works .
Appreciate any help in this regard.
-Sam

Hi,
See
http://antonis-antoniou.blogspot.com/2012/02/ensuring-that-your-adf-application-is.html

Oracle 10g Database Installation In Active-Passive Mode.

Good Afternoon !!!!
We are installing Oracle 10g in Active-Passive Mode on HP UX-11.3 , with ASM. Can someone help me with step wise installation procedure for the same.
Many Thank's
Rajeev.

Check on the release notes for your platform
This is for x86-64 Linux.. read it all, then you'll find the "6 Documentation Corrections and Additions" section you'll find the RPMs that you need
http://download.oracle.com/docs/cd/B19306_01/relnotes.102/b15666/toc.htm
then go to the official doc installation of 10gR2 on x86-64 Linux
http://download.oracle.com/docs/cd/B19306_01/install.102/b15667/toc.htm
Yum is a package management tool. This is what you'll be using to install the RPMs. But first you'll have to setup the Yum repository, usually what I do is stage the DVD media on the server then make it as a repository. If ever there's a specific (higher) version that I need then I just pull it on the RedHat Network.
There are a lot of HOWTOs about Yum. You may read on this link http://docs.fedoraproject.org/yum/en/
- Karl Arao
http://karlarao.wordpress.com/

Active - Passive Cluster

Hey, I have to manage an active passive cluster on SLES10 SP4. Oracle 10.2.0.4
All oracle binaries are on a DRBD Device on mountpoint /oradata.
This mountpoint includes the binaries and all datafiles.
I havent installed these systems. At one stage on node died and got reinstalled by a systemadministrator.
After a switch from the running node to the standby node, the cluster is not starting.
Jan 3 14:36:01 a logger: Cluster Ready Services waiting on dependencies. Diagnostics in /tmp/crsctl.6114.
Jan 3 14:36:14 a logger: Waiting for Oracle CSS service to be available before starting
Jan 3 14:36:14 a logger: ASM instance +ASM. Wait 2.
After issung $ORACLE_HOME/bin/localconfig add the cluster is starting, the asm instance is coming up, and also the database instance is starting.
Shortly after that the db instance dies. Alertlog is showing something like recursive sql error.
Looks like writing to the datafiles is not working.
In asmcmd the diskgroups are showing DISMOUNTED (show MOUNTED before)
so what to do ?
a) Why is it necessary to issue "localconfig add" to make the cluster starting ?
b) What could be a reason for not being able to write to the database ?
c) How would you guys install an active/passive cluster ?
c1) Install OS on both nodes
c2) Install oracle binaries
c2.1) on both nodes in the local files system and do the mapping to the drbd afterwards?
c2.2) only on one node and just switch the mountpoint ?
Chris

Hi,
first of all please clarify, if you have Oracle clusterware installed, or just the local configuration for local ASM.
There is a big difference between the 2, and also using DRBD has nothing to do with Oracle clusterware (and is not supported by Oracle).
a.) Localconfig may be necessary for a local ASM installation in 10.2. Main reason is, that the CSS service configuraton includes the hostname (which changed if you switched nodes). Hence may not be able to start ASM. With localconfig you are fixing this issue.
Very important: It is not a good idea to run this is a cluster configuration, since it will break things (a lot of things).
b.) If the ASM diskgroup got dismouned, then the database cannot write. Hence your problem. Why the diskgroup dismounted, you should find in the ASM alert.log
c.) I would go for RAC One Node. Which has this all preconfigured. So it makes life easier. Search for "RAC One Node" on OTN for more information. At least I would take a manual cluster, and do mirroring by ASM, and not DRBD....
c1.) Yes install Oracle cluster (or Grid infrastucture in 11.2) on both nodes. Like a RAC.
c2) Install database software on both nodes locally.
c2.1) No. No DRDB.
c2.2) Both nodes. Same installation.
Regards
Sebastian

Active/passive policies

My Organization want me build two node cluster Active/passive windows server 2012,sql server2012 multiple instances
node1=active,node2=passive
i have created cluster ,installed sql server....but the problem is for automatic failover.
1)do i need to select both the nodes on advances policies under resources and also preferred owners?
2) post and pre migration steps for migrating standalone instances databases (2008) to sql cluster(2012)
please help me

SQL Server needs to be installed on both the nodes as cluster instance, meaning on first node you should install new SQL Server cluster instance and on second node you need to run Add node and add the second node to this SQL cluster instance, hope this was
already done.
In cluster manager, from SQL Server cluster resource properties, you should have both the nodes ticked for "possible owners", but having "preferred owners" selected is optional, which basically tells, which is the preferred node
where SQL instance should run when both nodes are online.
There are various ways to move databases from one instance(SQL 2008) to higher version(SQl 2012) like Backup databases on SQL 2008, copy backup file to SQL 2012 server and then restore them on SQL 2012 Or Detach databases on SQL 2008, copy the detached
.mdf, .ndf and .ldf files to SQL 2012 and attach them there Or to reduce the amount of downtime during the migration process, you can setup logshipping between SQL 2008 and SQL 2012 and during cutover, break logshipping and restore latest log backups
with recovery.
Upgrade a Database Using Detach and Attach - http://msdn.microsoft.com/en-us/library/ms189625.aspx
Copy Databases with Backup and Restore - http://msdn.microsoft.com/en-IN/library/ms190436(v=sql.110).aspx
Minimizing DB Migration Downtime Using Log Shipping - http://blogs.msdn.com/b/sqlgardner/archive/2011/09/16/minimizing-db-migration-downtime-using-log-shipping.aspx
Keerthi Deep | Blog SQLServerF1 |
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In high availability Active-Active or Active-Passive is VPN supported

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