ACS 5.2 software high availability

Hi,
Can i setup primary/backup setup with ACS 5.2 software on Vmware ? Will replication/high availability happen just like if using two appliances ? I need to setup two ACS5.2 softwares on different Vmware machines.
regards
Joe

Hi Joe,
Yes that is possible. just make sure you meeting requirements mentioned on this document:
http://www.cisco.com/en/US/docs/net_mgmt/cisco_secure_access_control_system/5.2/installation/guide/csacs_vmware.html
Thanks
Serge

Similar Messages

Advice Requested - High Availability WITHOUT Failover Clustering

We're creating an entirely new Hyper-V virtualized environment on Server 2012 R2. My question is: Can we accomplish high availability WITHOUT using failover clustering?
So, I don't really have anything AGAINST failover clustering, and we will happily use it if it's the right solution for us, but to be honest, we really don't want ANYTHING to happen automatically when it comes to failover. Here's what I mean:
In this new environment, we have architected 2 identical, very capable Hyper-V physical hosts, each of which will run several VMs comprising the equivalent of a scaled-back version of our entire environment. In other words, there is at least a domain
controller, multiple web servers, and a (mirrored/HA/AlwaysOn) SQL Server 2012 VM running on each host, along with a few other miscellaneous one-off worker-bee VMs doing things like system monitoring. The SQL Server VM on each host has about 75% of the
physical memory resources dedicated to it (for performance reasons). We need pretty much the full horsepower of both machines up and going at all times under normal conditions.
So now, to high availability. The standard approach is to use failover clustering, but I am concerned that if these hosts are clustered, we'll have the equivalent of just 50% hardware capacity going at all times, with full failover in place of course
(we are using an iSCSI SAN for storage).
BUT, if these hosts are NOT clustered, and one of them is suddenly switched off, experiences some kind of catastrophic failure, or simply needs to be rebooted while applying WSUS patches, the SQL Server HA will fail over (so all databases will remain up
and going on the surviving VM), and the environment would continue functioning at somewhat reduced capacity until the failed host is restarted. With this approach, it seems to me that we would be running at 100% for the most part, and running at 50%
or so only in the event of a major failure, rather than running at 50% ALL the time.
Of course, in the event of a catastrophic failure, I'm also thinking that the one-off worker-bee VMs could be replicated to the alternate host so they could be started on the surviving host if needed during a long-term outage.
So basically, I am very interested in the thoughts of others with experience regarding taking this approach to Hyper-V architecture, as it seems as if failover clustering is almost a given when it comes to best practices and high availability. I guess
I'm looking for validation on my thinking.
So what do you think? What am I missing or forgetting? What will we LOSE if we go with a NON-clustered high-availability environment as I've described it?
Thanks in advance for your thoughts!

Udo -
Yes your responses are very helpful.
Can we use the built-in Server 2012 iSCSI Target Server role to convert the local RAID disks into an iSCSI LUN that the VMs could access? Or can that not run on the same physical box as the Hyper-V host? I guess if the physical box goes down
the LUN would go down anyway, huh? Or can I cluster that role (iSCSI target) as well? If not, do you have any other specific product suggestions I can research, or do I just end up wasting this 12TB of local disk storage?
- Morgan
That's a bad idea. First of all Microsoft iSCSI target is slow (it's non-cached @ server side). So if you really decided to use dedicated hardware for storage (maybe you do have a reason I don't know...) and if you're fine with your storage being a single
point of failure (OK, maybe your RTOs and RPOs are fair enough) then at least use SMB share. SMB at least does cache I/O on both client and server sides and also you can use Storage Spaces as a back end of it (non-clustered) so read "write back flash cache
for cheap". See:
What's new in iSCSI target with Windows Server 2012 R2
http://technet.microsoft.com/en-us/library/dn305893.aspx
Improved optimization to allow disk-level caching
Updated
iSCSI Target Server now sets the disk cache bypass flag on a hosting disk I/O, through Force Unit Access (FUA), only when the issuing initiator explicitly requests it. This change can potentially improve performance.
Previously, iSCSI Target Server would always set the disk cache bypass flag on all I/O’s. System cache bypass functionality remains unchanged in iSCSI Target Server; for instance, the file system cache on the target server is always bypassed.
Yes you can cluster iSCSI target from Microsoft but a) it would be SLOW as there would be only active-passive I/O model (no real use from MPIO between multiple hosts) and b) that would require a shared storage for Windows Cluster. What for? Scenario was
usable with a) there was no virtual FC so guest VM cluster could not use FC LUs and b) there was no shared VHDX so SAS could not be used for guest VM cluster as well. Now both are present so scenario is useless: just export your existing shared storage without
any Microsoft iSCSI target and you'll be happy. For references see:
MSFT iSCSI Target in HA mode
http://technet.microsoft.com/en-us/library/gg232621(v=ws.10).aspx
Cluster MSFT iSCSI Target with SAS back end
http://techontip.wordpress.com/2011/05/03/microsoft-iscsi-target-cluster-building-walkthrough/
Guest
VM Cluster Storage Options
http://technet.microsoft.com/en-us/library/dn440540.aspx
Storage options
The following tables lists the storage types that you can use to provide shared storage for a guest cluster.
Storage Type
Description
Shared virtual hard disk
New in Windows Server 2012 R2, you can configure multiple virtual machines to connect to and use a single virtual hard disk (.vhdx) file. Each virtual machine can access the virtual hard disk just like servers
would connect to the same LUN in a storage area network (SAN). For more information, see Deploy a Guest Cluster Using a Shared Virtual Hard Disk.
Virtual Fibre Channel
Introduced in Windows Server 2012, virtual Fibre Channel enables you to connect virtual machines to LUNs on a Fibre Channel SAN. For more information, see Hyper-V
Virtual Fibre Channel Overview.
iSCSI
The iSCSI initiator inside a virtual machine enables you to connect over the network to an iSCSI target. For more information, see iSCSI
Target Block Storage Overviewand the blog post Introduction of iSCSI Target in Windows
Server 2012.
Storage requirements depend on the clustered roles that run on the cluster. Most clustered roles use clustered storage, where the storage is available on any cluster node that runs a clustered
role. Examples of clustered storage include Physical Disk resources and Cluster Shared Volumes (CSV). Some roles do not require storage that is managed by the cluster. For example, you can configure Microsoft SQL Server to use availability groups that replicate
the data between nodes. Other clustered roles may use Server Message Block (SMB) shares or Network File System (NFS) shares as data stores that any cluster node can access.
Sure you can use third-party software to replicate 12TB of your storage between just a pair of nodes to create a fully fault-tolerant cluster. See (there's also a free offering):
StarWind VSAN [Virtual SAN] for Hyper-V
http://www.starwindsoftware.com/native-san-for-hyper-v-free-edition
Product is similar to what VMware had just released for ESXi except it's selling for ~2 years so is mature :)
There are other guys doing this say DataCore (more playing for Windows-based FC) and SteelEye (more about geo-cluster & replication). But you may want to give them a try.
Hope this helped a bit :)
StarWind VSAN [Virtual SAN] clusters Hyper-V without SAS, Fibre Channel, SMB 3.0 or iSCSI, uses Ethernet to mirror internally mounted SATA disks between hosts.

Hyper-V 2012 High Availability using Windows Server 2012 File Server Storage

Hi Guys,
Need your expertise regarding hyper-v high availability. We setup 2 hyper-v 2012 host in our infra for our domain consolidation project. Unfortunately, we don't have hardware storage that is said to be a requirement that we can use to create a failover cluster
for hyper-v host to implement HA. Here's the setup:
Host1
HP Proliant L380 G7
Windows Server 2012 Std
Hyper-V role, Failover Cluster Manager and File and Storage Services installed
Host2
Dell PowerEdge 2950
Windows Server 2012 Std
Hyper-V role, Failover Cluster Manager and File and Storage Services installed
Storage
Dell PowerEdge 6800
Windows Server 2012 Std
File and Storage Services installed
I'm able to configure the new feature about Shared Nothing Live Migration - i'm able to move VM's back and fort between my hosts without storage. But this is planned and proactive approach. My concern is to have my hyper-v host to become highly available in
the event of system failure. If my host1 dies, the VMs should go/move to host2 and vice versa. In setting this up, i believe i need to enable the failover clustering between my hyper-v hosts which i already did but upon validation, it says "No disks
were found on which to perform cluster validation tests." Is it possible to cluster it using just a regular windows file server? I've read about SMB 3.0 and i've configured it as well i'm able to save VMs on my file server, but i don't think that my hyper-v
hosts are already highly available.
Any feedback and suggestions or recommendation is highly appreciated. Thanks in advance!

Hi Guys,
Need your expertise regarding hyper-v high availability. We setup 2 hyper-v 2012 host in our infra for our domain consolidation project. Unfortunately, we don't have hardware storage that is said to be a requirement that we can use to create a failover cluster
for hyper-v host to implement HA. Here's the setup:
Host1
HP Proliant L380 G7
Windows Server 2012 Std
Hyper-V role, Failover Cluster Manager and File and Storage Services installed
Host2
Dell PowerEdge 2950
Windows Server 2012 Std
Hyper-V role, Failover Cluster Manager and File and Storage Services installed
Storage
Dell PowerEdge 6800
Windows Server 2012 Std
File and Storage Services installed
I'm able to configure the new feature about Shared Nothing Live Migration - i'm able to move VM's back and fort between my hosts without storage. But this is planned and proactive approach. My concern is to have my hyper-v host to become highly available in
the event of system failure. If my host1 dies, the VMs should go/move to host2 and vice versa. In setting this up, i believe i need to enable the failover clustering between my hyper-v hosts which i already did but upon validation, it says "No disks were
found on which to perform cluster validation tests." Is it possible to cluster it using just a regular windows file server? I've read about SMB 3.0 and i've configured it as well i'm able to save VMs on my file server, but i don't think that my hyper-v hosts
are already highly available.
Any feedback and suggestions or recommendation is highly appreciated. Thanks in advance!
Your shared storage is a single point of failure with this scenario so I would not consider the whole setup as a production configuration... Also setup is both slow (all I/O is travelling down the wire to storage server, running VMs from DAS is ages faster)
and expensive (third server + extra Windows license). I would think twice about what you do and either deploy a built-in VM replication technologies (Hyper-V Replica) and apps built-in clustering features that does not require shared storage (SQL Server and
Database Mirroring for example, BTW what workload do you run?) or use some third-party software creating fault tolerant shared storage from DAS or investing into physical shared storage hardware (HA one of course).
Hi VR38DETT,
Thanks for responding. The hosts will cater a domain controller (on each host), Web filtering software (Websense), Anti-Virus (McAfee ePO), WSUS and an Auditserver as of the moment. Is the Hyper-V Replica somewhat give "high availability" to VMs or Hyper-V
hosts? Also, is the cluster required in order to implement it? Haven't tried that but worth a try.

Windows 2012 RDS - Session Host servers High Availability

Hello Windows/Terminal server Champs,
I am new middle of implementing RDS environment for one of my customer, Hope you could help me out.
My customer has asked for HA for RDS session host where applications are published, and i have prepared below plan for server point of view.
2 Session Host server, 1 webaccess, 1 License/connection
Broker & 1 Gateway (DMZ).
In first Phase, we are planning to target internal user
who connect to Session host HA where these 2 servers will have application installed and internal user will use RDP to access these application.
In second Phase we will be dealing with external Party who connect from external network where we are planning to integrate with NetIQ => gateway
=> Webaccess/Session host
I have successfully installed and configured 2 Session
Host, 1 license/Broker. 1 webAccess & 1 Gateway. But my main concern to have session Host High Available as it is hosting the application and most of the internal user going to use it. to configure it i am following http://technet.microsoft.com/en-us/library/cc753891.aspx
However most of the Architecture is change in RDS 2012. can you please help me out to setup the Session Host HA.
Note: we can have only 1 Connection broker /Licensing server , 1 webacess server & 1 Gateway server, we cannot increase more server due to cost
factor.
thanks in advance.

Yes, absolutely no problem in just using one connection broker in your environment as long as your customer understands the SPOF.
the session hosts however aren't really what you would class HA - but to set them up so youhave reduancy you would use either Windows NLB, an external NLB device or windows dns round robin. My preferred option when using the connection broker is DNS round
robin - where you give each server in the farm the same farm name dns entry - the connection broker then decides which server to allocate the session too.
You must ensure your session host servers are identical in terms of software though - same software installed in the same paths on all the session host servers.
if you use the 2012 deployment wizard through server manager roles the majority of the config is done for you.
Regards,
Denis Cooper
MCITP EA - MCT
Help keep the forums tidy, if this has helped please mark it as an answer
My Blog
LinkedIn:

Cluster install, high availability

Hi All,
Does anyone have a guide or can detail the steps (differences from a single server install) to install BPC 7.0 Microsoft version in a Cluster Environment(High Availability).
Cheers

Hello Jitendra,
SQL should have its own cluster group. So should DTC and the shared storage.
The name of the cluster that Sorin is refering to is the virtual name associated with the clustered resource, so in this case the DNS name of the SQL cluster group. The idea is that BPC does not care that it is running on a cluster, all it wants is a SQL server. The clustering aspect is transparent to BPC and is left to MS Clustering. Same thing if you have a specific group for SSAS, you give that group's DNS name when installing BPC.
The WEB/App servers components should not be installed on the cluster, but rather on NLB nodes.
Reporting services can be installed either on the cluster or on the web/app server, but keep in mind that most companies don't like having a web server on database servers, so we usually install SSRS on the web/app servers. The SSRS database repository would be located on the SQL cluster in either case.
In the case of NLB being used for the web/app servers, the file share should be located on a shared resource, it cannot be local on the web/app servers. It can be located on the cluster, or any dependable network share that uses the same AD security as the servers.
Note that for NLB we usually recommend using a hardware solution as it is faster than using the software solution that is part of Windows, and does not take resources away from the web/app server.
I hope this helps
Best regards,
Bruno Ranchy

Oracle EBS R12.1.3 High Availability with RAC 11g on VMWARE

Dear All,
Our customer requirement is of high availability and good utilization of hardware for EBS R12.13 implementation.As per our strategy we want to use Oracle VM(I think it doesn't require any licensing) , RAC 11gR2 and appstier load balancing.We have only two servers to achieve all these.One one node there will be two VMs one for dbtier and another one for appstier and same will be on second server.So this way we will be having four virtual machines on two physical nodes.For all these we will use OEL Linux as Operating system
Please share your experiences , if above deployment model is correct or need further enhancements.
Regards.

Our customer requirement is of high availability and good utilization of hardware for EBS R12.13 implementation.As per our strategy we want to use Oracle VM(I think it doesn't require any licensing) , Please contact your Oracle Sales representative for license questions.
RAC 11gR2 and appstier load balancing.We have only two servers to achieve all these.One one node there will be two VMs one for dbtier and another one for appstier and same will be on second server.So this way we will be having four virtual machines on two physical nodes.For all these we will use OEL Linux as Operating system
Please share your experiences , if above deployment model is correct or need further enhancements.Please see these docs.
Using Oracle VM Templates for Oracle E-Business Suite [ID 975734.1]
Using Oracle VM with Oracle E-Business Suite Release 11i or Release 12 [ID 465915.1]
Oracle E-Business Suite High Availability on Oracle VM [ID 986690.1]
Certified Software on Oracle VM [ID 464754.1]
Oracle VM General Frequently Asked Questions [ID 464756.1]
Thanks,
Hussein

Migrating Dimension Server from local installation to High Availability

Hi Team,
When Hyperion was installed on the client site (11.1.2.3), there was no requirement for EPMA to become highly available.
Now that has become a requirement to make it highly available in the event that one of the virtual machine is unreachable.
In the event that a server becomes unavailable, it is acceptable for a manual failover procedure to be done.
What steps can be taken to prepare for such an event?
Possible outcome:
Configure another dimension server on the second Virtual machine and leave it manually switched off.
Modify the IIS path to point to a clustered location accessible by both machines.
In the event of a failover, manually bring up the dimension server on the other machine.
This is yet to be implemented successfully.
Current Scenerio:
1 x Windows Machine hosting:
Foundation Services
Calculation Manager
Performance Architect
Planning
Reporting and Analysis
Repository location on a shared mount (Clustered filesystem)
FDQM
Essbase
Analytic Provider Services
Essbase Integration Services (not used)
Essbase Studio (not used)
1 x Linux Machine
Essbase Server
Arborpath on a shared mount
Aim: Add 2 new Virtual Machines ( 1 x Windows App Server + 1 x Linux Essbase Server) for high availability.
Progress:
Windows Machine components clustered:
Foundation Services
Calculation Manager
Planning
Reporting and Analysis
Essbase
Analytic Provider Services
Linux Essbase Machines:
Configured Active/Passive using OPMN
Challenge faced:
Failover scenerio can be a manual list of steps to provide functionaility.
Please provide support on introducing failover steps for dimension server.

Remote Desktop/Preferences/Task Server
Add the FQDN or I.P address of your server in this pane on your book(basically your pointing your book to your installed software on the other machine). Setup your server with the installs you want it to make, and administer it via your book (or any machines with another unlimited ARD) IF you want report generation, you would schedule the clients to send the info to the server. A task server can only do 2 things, install packages or change client settings, thats it.

After start of Grid High Availability Service (HAS) can't umount filesystem

I have weird problem when I start and stop HAS. File system get's into state, where it does not umount. So filesystem where grid software is running can't be umounted on boot. 9Is there something I do wrong, or don't do right.
I have fresh install of latest 64-bit UEK2 kernel (2.6.39-400.109.1.el6uek.x86) and Oracle 11.2.0.3 Grid Infrastructure for standalone server. I Installed patch p12983005 (112036_Linux-x86-64) to get ACFS support for kernel. When I start HAS and ASM, file system does not umount anymore. Here's steps. Example is from local disk, but I have same problem with LUN from SAN. I thought it might have something to do with SAN and multipath, but SAN is not to blame cos same happens with local disk. Don't know why local disk seem be mapped by multipath in fstab.
1. Mount fs
[root@SERVER ~]# mount -t ext4 /dev/mapper/vg_SERVER-lv_app /u01
2. Start HAS
[grid@SERVER ~]$ crsctl start has
CRS-4123: Oracle High Availability Services has been started.
3. Stop HAS
[grid@SERVER ~]$ crsctl stop has
CRS-2791: Starting shutdown of Oracle High Availability Services-managed resources on 'SERVER'
CRS-2673: Attempting to stop 'ora.cssd' on 'SERVER'
CRS-2673: Attempting to stop 'ora.LISTENER.lsnr' on 'SERVER'
CRS-2677: Stop of 'ora.cssd' on 'SERVER' succeeded
CRS-2677: Stop of 'ora.LISTENER.lsnr' on 'SERVER' succeeded
CRS-2673: Attempting to stop 'ora.evmd' on 'SERVER'
CRS-2677: Stop of 'ora.evmd' on 'SERVER' succeeded
CRS-2793: Shutdown of Oracle High Availability Services-managed resources on 'SERVER' has completed
CRS-4133: Oracle High Availability Services has been stopped.
4. Try umount
[root@SERVER ~]# umount /u01
umount: /u01: device is busy.
(In some cases useful info about processes that use
the device is found by lsof(8) or fuser(1))
[root@SERVER ~]# fuser /u01
[root@SERVER ~]# lsof |grep /u01
Neither of fuser or lsof returns nothing.
This and the fact that ACFS cannon't be mounted on boot, get's me wondering should I use ASM and Oracle Restart at all at this point. Initial reason is that in future this is likely going to be part of RAC.

I followed the instructions and copied the edid file I obtained while monitor was connected directly to the specified directory.
Now I get:
Jan 17 13:14:09 daniel-think kernel: platform VGA-1: Direct firmware load for edid/medion-edid.bin failed with error -2
Jan 17 13:14:09 daniel-think kernel: [drm:edid_load] *ERROR* Requesting EDID firmware "edid/medion-edid.bin" failed (err=-2)

Running SAP XI in High Availability

Bonjour a vous tous !
I am looking for best practices when running SAP Exchange Infrastructure (3.0, well it is now XI 7.0 with the new NW2004s SP9) in High Availability mode.
The customer that I work with does not know yet on which platform its production environment will be (Unix/Oracle vs Microsoft/SqlServer 20005). I know that some hardware vendor has built-in HA capabilities, either Software/Hardware based (MSFT MCS, IBM HACMP, etc).
Should we go for an "SAP XI all-In One" installation or distributed one ? Should we get one central SLD or one per environment? What is the role of the SLD and Solution Manager? Do they need to be interconnected?
I have worked with other EAI middlewares (Biztralk Server and webMethods) and normally the Integration Engine sit on it's own server and the various adapters are on their respective servers (i.e.: one server for HTTP, one server for FTP, one server for EJB, etc), since the sizing (RAM. Java heap memory, etc) for all theses adapters are different (FTP a lot of small file, EJB not so many request, but they could eat-up a lot of CPU, etc). Is this a best practice that I can apply also with SAP XI ?
Thank in advance for you help !
A+

Hi Michel,
Well we seem to work along the same track...
I am working on 2 customers concurrently - the one using like you using PI 7.0. In their case we implemented a Windows solution using W2K3 Enterprise Edition 64-bit. Avoid 32-bit as it will no longer be supported by SAP next year. We are using MSCS (which is part of the Enterprise Edition by default).
The 2nd is a solaris customer (very large) for which we are using a cross-data center solution handled by Veritas Cluster Manager with automatic failover between systems and data centers if required.
Some answers to your questions:
1. All-in-one - yes
2. SLD - one for DEV/QA, and separate for Prod - this is recomended by SAP too - I can mail you a guide if needed
3. With Solution Manager 4.0, it now supports the J2EE side and hence can understand SLDs. The concept is to setup an HA Solution Manager and deploy the SLD for Prod on the same piece of kit.
4. SAP do not recomend splitting off the Adapter Engine except for specific cases, the main reason being if you have specific systems behind firewalls that you need to communicate with.
Under no circumstances should you have separate AE's per adapter - this would be an extermely expensive solution hardware and support-wise.
Regards
Brian

New major release of Sun Storage 7000 software is available

I noticed a new major release of the Sun Storage 7000 software is available at the website below.
http://wikis.sun.com/display/FishWorks/Sun+Storage+7000+Series+Software+Updates.

The format change is for BDB Java Edition 5.0 only, and does not apply to other BDB products. It's forward compatible, which means that a BDB JE application using JE 5.0 can use environments written with older versions of JE. However, it's not backwards compatible; once your environment has been opened by JE 5.0, it's been converted to the new format, and can no longer be readable by older versions of JE.
Just for the benefit of others who may not have read the changelog, here's the full text:
JE 5.0.34 has moved to on-disk file format 8.
The change is forward compatible in that JE files created with release 4.1 and earlier can be read when opened with JE 5.0.34. The change is not backward compatible in that files created with JE 5.0 cannot be read by earlier releases. Note that if an existing environment is opened read/write, a new log file is written by JE 5.0 and the environment can no longer be read by earlier releases.
There are two important notes about the file format change.
The file format change enabled significant improvements in the operation performance, memory and disk footprint, and concurrency of databases with duplicate keys. Environments which contain databases with duplicate keys must run an upgrade utility before opening an environment with this release. See the Performance section for more information.
An application which uses JE replication may not upgrade directly from JE 4.0 to JE 5.0. Instead, the upgrade must be done from JE 4.0 to JE 4.1 and then to JE 5.0. Applications already at JE 4.1 are not affected. Upgrade guidance can be found in the new chapter, "Upgrading a JE Replication Group", in the "Getting Started with BDB JE High Availability" guide.I may not have fully understood your question, so let us know if that doesn't answer it.
Edited by: Linda Lee on Dec 1, 2011 10:41 AM

SAP NetWeaver 7.30 High-Availability installation without MSCS

Hi all,
Do we have any option to install SAP NetWeaver 7.30 High-Availability System on the third-party cluster solution, except for MS Cluster Service?
I tried to install the first cluster node without MSCS configuration, however, sapinst.exe checks whether we already set up MSCS on this node, then installer aborted.
I'd like to know the way to disable this checks. (Or, way to mimic the installer as if MSCS cluster configuration was done.)
If unavailable, I have to install MSCS first, and SAP NetWeaver, then also have to uninstall MSCS instead of out cluster software;
It seems to me no sense.
Best regards,

Hi Peter,
Thanks for your quick response.
It is disappointed for me that HA Installation is tightly combined with MSCS.
Do we have a way to migrate from other installation scenario to High-Availability?
For example, once we install ASCS instance as distributed system, then migrate
it for High-Availability usage, leveraged by profile updates and so on?
I'm not sure how High-Availability installation is different from other installation
scenario except for installation path and hostname to be used for connection.
Best regards,

High Availability for EBS Database 11gR2

Hello Gurus,
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 for the database. We don't want to go with RAC at this stage. What are the other alternatives to achieve high availability at the database side.
Thanks in advance!
-Khan

I have come across the note id
How To Install An Oracle Database In An Active/Passive Configuration Without RAC? [ID 734361.1]
Can you please confirm if this can be used to configure Database for HA?
Also please confirm if I need to get the two servers configured with any cluster software at Linux level?

High Availability Sites Using ICAN or Java CAPS

Has anyone here implemented either ICAN 5.0.x or Java CAPS 5.1 in a High Availability scenario?
If so, how have people gone about doing it? Have you used a different JMS server? How have you ensures message persistence across a WAN?
I'm interested in any user stories or I can arrange a phone call to anyone who has implemented this?
Thanks and regards
Steve
[email protected]

Hi, there,
I am not sure if there is a mostly software based solution for an ICAN deployment in HA. However, if you are using CAPS 5.1+, you can definitely use the SJSAS EE as the runtime, and the bundled SJSMQ EE definitely supports distributed message HA through clustered message brokers.

ASCP High Availability

How does one go about achieving high availability with Advanced Supply Chain Planning w/ R12 at the Apps Tier?
We are currently running RAC for our database tier, multiple application servers at the apps tier, and load balancing at the web tier.
However, when we upgrade to R12 and take advantage of installing ASCP on a 64 bit machine at the app tier, how can we make it highly available?
Thanks

Hi Nikhil,
information on High Availability you can find at [High Availability|High Availability]. Be aware that SAP does not deliver the actual High Availability software, but works together with partners on this. But a complete description on how to install on top of an HA system is in Technical Infrastructure Guide.
Regards,
Benny

Timesten high availability question

I have a case presented here and wanted to know if it is actually possible to implement.
Let us consider four nodes with timesten (11.2) installed in all of them. A datastore with the same name is created on each of the four servers. Two of these servers are in location A and the other two in location B. Servers in location A have replication defined between them and similarly servers in B have replication defined between them. But note that there is no replication defined between any server in location A with any server in location B.
The basic idea of this entire setup is to maintain high availability of timesten at any point of time (in case of natural disasters, etc..) irrespective of the location of the servers
Now, we have oracle software installed in four other systems. Two of these servers are in location A and the other two are in location B. Note that they are not installed on the same box as Timesten.
Scenario 1:
Question: Timesten in location A goes down, how is the high availability taken care of?
Answer: Timesten in the other server in location A should come up and because of the replication process, this will solve the problem.
Is this correct? I think it is.
Scenario 2:
Question: Timesten installed on both the nodes at location A go down, how is high availability taken care of?
Answer: ?
Please remember from above that timesten does not have a replication policy defined between any server in location A with any server in location B. The requirement says that we should be able to recover all the latest data that the nodes at location A had, by pulling it from oracle DB at location A and putting it into TT server in location B. I would like to know if it is possible to do this?

Hello,
Your approach is correct in designing a Disaster Recovery architecture for TimesTen and Oracle Database. TimesTen supports an Active-Standby pair topology that works well with integrating with the Oracle database within a particular site. However, like for any geographical based replication, it is recommended to configure replication across the WAN using the Oracle Database GoldenGate or Streams technologies in ASYNC mode for better throughput and efficiency. It is also recommended to compress replication traffic across the WAN between the Oracle databases.
So while using the Oracle Database to replicate transactions across the WAN is the right thing to do (using Streams Replication or GoldenGate between the two Oracle databases (assuming using an Oracle RAC 2-node cluster in each site), you will not be able to guarantee that any transactions in site A has made it to site B. GoldenGate and Streams technologies have the ability to replicate the data bi-directionally. What this means is that when site A recovers, transactions that had been trapped there (either between TimesTen and the Oracle DB or in the Oracle DB transaction logs), will attempt to replicate again to site B, so it is important to set up a conflict detection/resolution approach which is possible to do in either GoldenGate or Streams.
Note that Oracle Data Guard replication is not supported with TimesTen in such a configuration across the WAN where TimesTen datastores need to be maintained in both sites.
To fully answer the question, however, we should get into the details of the type of cache group tables that you intend to use in TimesTen. If using TimesTen as just a read-only cache while all inserts/updates happen in the Oracle database, then OracleDB would be regarded as the database of record and it would be used to handles all changes while data changes get auto-refreshed from teh Oracle databases in each site into the respective TimesTen tables.
If the application will be looking to take advantage of fast writes into TimesTen using AWT (async writethrough cache group tables), then it is recommended to configure those tables to be DYNAMIC AWT tables so that if a failover to site B takes place and the data is not in TimesTen (but it is in the Oracle Database), it will be automatically loaded on demand as needed from the Oracle database in site B. Note however that there are restrictions that exist with DYNAMIC load on demand cache groups that you need to look into to find out whether those would work in your application's case (particularly, load on demand works only if the where clause includes an equality predicate on the primary keys, foreigh keys, or unique indexes, etc...)
To fully answer your question on non data loss across geographies, you'd have to use Synchronous replication between TimesTen and Oracle using Synchronous Writethrough Cache Groups and SYNC replication in Streams for example between the two geographies. Neither of those configurations are used to my knowledge in the field because they are very non optimal and carry huge response time expense, which slows down replication considerably and affects application response times.
My assumption also is that the need for the Oracle database is because all data does not fit into memory. If the data does fit into memory, then you could also consider a pure timesten replication across the two sites using an active-standby pair on site A and a read-only subscriber on site B that would be made ACTIVE only in the case of a disaster on site A. Once site B takes over, you can also create an active-standby pair in site B based on the newly elected ACTIVE datastore in that site. In all these cases, it is recommended to use SYNC 2-SAFE replication between TimesTen datastores in the same site and ASYNC replication between the two sites.

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