HANA High Availability System Vs Storage Vs VIP failover

Dear Experts,
Hope your all doing great. I would like to seek your expertise on HANA high availability best practice. We have been deciding to use TDI for BW on HANA. The next big question for us is how make it available atleast 99.99%.
I was going through multiple documents, SDN forums, etc..but would like to see how the experts are performing in real time.
My view -
Virtual IP failover is a common HA practice which have been used to failover CI / DB hosts depends on failure/maintenance. In this case, both nodes can be used to run app servers.
System replication - HANA based required secondary standby node, which doesn't accept user requests, but replicate the database from primary using logs after initial data snapshot either synchronous or Asynchronous. (Can be used as HA or DR - if servers are between different data centers).
Storage replication - HANA based required secondary standby node, which replicates SAN for HA/DR.
Could you please provide your expertise method you followed for HANA HA and what are the pros, cons and challenges that you have faced or facing.
Thanks
Yoga

Thanks forbrich
Do you know any specific doc that describes the installation and configuration steps of 10g RAC on NAS? If possible, can you provide some link that I could use to perform this task?
I have done RAC installations on SAN without any problems and its something I'm fairly experienced with. With NAS I am not really comfortable since I can't seem to find any documentation that describes step by step installation procedure or guidelines for that matter.
Thank you for your input
Best Regards
Abbas

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<...>
56. Standard Edition
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Would this be useful?
http://daugerresearch.com/pooch/top.shtml
!http://daugerresearch.com/images/pooch1.jpg!
+What is Pooch?+
+Pooch is software providing the easiest way to assemble and operate a high-performance parallel computer. We encourage you to follow the Mac Cluster Recipe and see for yourself.+

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VIP failover in Oracle RAC

Dear all,
I am using Oracle Rac 10gR2 running on top of Sun Cluster 3.2u3.
I have a test to check the failover ability of VIP in Oracle RAC, however the result was not as I expected.
The test scenario was:
- Turn on the 02 nodes and wait for all services including both Sun Cluster and Oracle RAC online.
- Using SQL Navigator to connect to the database using the VIP on node1. (VIP1)
- Shutdown the node1.
- All services and resources on node2 still online, however after a long time (about 10 mins), I did not see the VIP1 failover to the alive node.
- The "crs_stat -t" command did not show the VIP1 online on node2 (alice node).
- The SQL Navigator could not establish the connection to the databasse using the VIP1 any more.
The output of "crs_stat -t" command before shutting down the node1:
oracle@t5120-02 $ crs_stat -t
Name Type Target State Host
ora.orcl.db application ONLINE ONLINE t5120-02
ora....l1.inst application ONLINE ONLINE t5120-01
ora....l2.inst application ONLINE ONLINE t5120-02
ora....01.lsnr application ONLINE ONLINE t5120-01
ora....-01.gsd application ONLINE ONLINE t5120-01
ora....-01.ons application ONLINE ONLINE t5120-01
ora....-01.vip application ONLINE ONLINE t5120-01
ora....02.lsnr application ONLINE ONLINE t5120-02
ora....-02.gsd application ONLINE ONLINE t5120-02
ora....-02.ons application ONLINE ONLINE t5120-02
ora....-02.vip application ONLINE ONLINE t5120-02
The output of "crs_stat -t" command after shutting down the node1:
oracle@t5120-02 $ crs_stat -t
Name Type Target State Host
ora.orcl.db application ONLINE ONLINE t5120-02
ora....l1.inst application OFFLINE OFFLINE
ora....l2.inst application ONLINE ONLINE t5120-02
ora....01.lsnr application OFFLINE OFFLINE
ora....-01.gsd application OFFLINE OFFLINE
ora....-01.ons application OFFLINE OFFLINE
ora....-01.vip application OFFLINE OFFLINE
ora....02.lsnr application ONLINE ONLINE t5120-02
ora....-02.gsd application ONLINE ONLINE t5120-02
ora....-02.ons application ONLINE ONLINE t5120-02
ora....-02.vip application ONLINE ONLINE t5120-02
So my questions are:
- Was my test scenario correct to check the failover ability of VIP in Oracle RAC?
- Is there any additional configuration needed to perform on the system to achieve the VIP failover?
Please help me in this case as I am new to Oracle RAC.
Thanks.
HuyNQ.

Dear Rajesh,
Sorry for late reply.
I have already tested 02 cases: shutting down a node and crashing a node. Below are the output of the log files in the 2 test cases.
Once again, when shutting down a node, the VIP did not failover although the CRS on that node was shutdown before all other services and resources of Sun Cluster shutdown.
Please help to check the log files and give me advise if you see anything abnormally.
Thanks.
* In case of shutting down the node 1: (at about 09:05 Sep 17)
Shutdown node 1:
root@t5120-01 # shutdown -y -g0 -i0
Shutdown started. Fri Sep 17 09:04:55 ICT 2010
Changing to init state 0 - please wait
Broadcast Message from root (console) on t5120-01 Fri Sep 17 09:04:55...
THE SYSTEM t5120-01 IS BEING SHUT DOWN NOW ! ! !
Log off now or risk your files being damaged
crsd.log file on node 2:
root@t5120-02 # more /u01/app/oracle/10.2.0/crs/log/t5120-02/crsd/crsd.log
2010-09-16 16:35:56.281: [ CRSRES][1326] t5120-02 : CRS-1019: Resource ora.t5120-01.gsd (application) cannot run on t5120-02
2010-09-16 16:35:56.320: [ CRSRES][1325] t5120-02 : CRS-1019: Resource ora.t5120-01.LISTENER_T5120-01.lsnr (application) cannot run on t5120-02
2010-09-16 16:35:56.346: [ CRSRES][1327] t5120-02 : CRS-1019: Resource ora.t5120-01.ons (application) cannot run on t5120-02
2010-09-16 17:06:10.202: [ CRSRES][1520] StopResource: setting CLI values
2010-09-17 09:06:10.567: [ CRSCOMM][5709] CLEANUP: Searching for connections to failed node t5120-01
2010-09-17 09:06:10.577: [ CRSEVT][5709] Processing member leave for t5120-01, incarnation: 11
2010-09-17 09:06:10.665: [    CRSD][5709] SM: recovery in process: 8
2010-09-17 09:06:10.665: [ CRSEVT][5709] Do failover for: t5120-01
2010-09-17 09:06:10.826: [ CRSEVT][5709] Post recovery done evmd event for: t5120-01
2010-09-17 09:06:10.898: [    CRSD][5709] SM: recoveryDone: 0
2010-09-17 09:06:10.918: [ CRSEVT][5710] Processing RecoveryDone
crs_stat -t on node 2:
oracle@t5120-02 $ crs_stat -t
Name Type Target State Host
ora.orcl.db application ONLINE ONLINE t5120-02
ora....l1.inst application OFFLINE OFFLINE
ora....l2.inst application ONLINE ONLINE t5120-02
ora....01.lsnr application OFFLINE OFFLINE
ora....-01.gsd application OFFLINE OFFLINE
ora....-01.ons application OFFLINE OFFLINE
ora....-01.vip application OFFLINE OFFLINE
ora....02.lsnr application ONLINE ONLINE t5120-02
ora....-02.gsd application ONLINE ONLINE t5120-02
ora....-02.ons application ONLINE ONLINE t5120-02
ora....-02.vip application ONLINE ONLINE t5120-02
* In case of crashing the node 1: (at about 09:32 Sep 17)
Crash the node 1:
root@t5120-01 # Sep 17 09:31:16 t5120-01 Cluster.CCR: pmmd: fsync_core_files: could not get any core file paths: pcorefile error Invalid argument, gcorefile error Invalid argument, zcorefile error Invalid argument
Sep 17 09:31:16 t5120-01 Cluster.CCR: [ID 408757 daemon.alert] pmmd: fsync_core_files: could not get any core file paths: pcorefile error Invalid argument, gcorefile error Invalid argument, zcorefile error Invalid argument
Notifying cluster that this node is panicking
crsd.log file on node 2:
root@t5120-02 # tail -30 /u01/app/oracle/10.2.0/crs/log/t5120-02/crsd/crsd.log
2010-09-16 16:35:56.281: [ CRSRES][1326] t5120-02 : CRS-1019: Resource ora.t5120-01.gsd (application) cannot run on t5120-02
2010-09-16 16:35:56.320: [ CRSRES][1325] t5120-02 : CRS-1019: Resource ora.t5120-01.LISTENER_T5120-01.lsnr (application) cannot run on t5120-02
2010-09-16 16:35:56.346: [ CRSRES][1327] t5120-02 : CRS-1019: Resource ora.t5120-01.ons (application) cannot run on t5120-02
2010-09-16 17:06:10.202: [ CRSRES][1520] StopResource: setting CLI values
2010-09-17 09:06:10.567: [ CRSCOMM][5709] CLEANUP: Searching for connections to failed node t5120-01
2010-09-17 09:06:10.577: [ CRSEVT][5709] Processing member leave for t5120-01, incarnation: 11
2010-09-17 09:06:10.665: [    CRSD][5709] SM: recovery in process: 8
2010-09-17 09:06:10.665: [ CRSEVT][5709] Do failover for: t5120-01
2010-09-17 09:06:10.826: [ CRSEVT][5709] Post recovery done evmd event for: t5120-01
2010-09-17 09:06:10.898: [    CRSD][5709] SM: recoveryDone: 0
2010-09-17 09:06:10.918: [ CRSEVT][5710] Processing RecoveryDone
2010-09-17 09:32:08.810: [ CRSCOMM][5837] CLEANUP: Searching for connections to failed node t5120-01
2010-09-17 09:32:08.811: [ CRSEVT][5837] Processing member leave for t5120-01, incarnation: 13
2010-09-17 09:32:08.824: [    CRSD][5837] SM: recovery in process: 8
2010-09-17 09:32:08.824: [ CRSEVT][5837] Do failover for: t5120-01
2010-09-17 09:32:09.036: [ CRSRES][5837] startup = 0
2010-09-17 09:32:09.075: [ CRSRES][5837] startup = 0
2010-09-17 09:32:09.106: [ CRSRES][5837] startup = 0
2010-09-17 09:32:09.132: [ CRSRES][5837] startup = 0
2010-09-17 09:32:09.153: [ CRSRES][5837] startup = 0
2010-09-17 09:32:09.565: [ CRSRES][5839] startRunnable: setting CLI values
2010-09-17 09:32:09.575: [ CRSRES][5839] Attempting to start `ora.t5120-01.vip` on member `t5120-02`
2010-09-17 09:32:16.276: [ CRSRES][5839] Start of `ora.t5120-01.vip` on member `t5120-02` succeeded.
2010-09-17 09:32:16.340: [ CRSEVT][5837] Post recovery done evmd event for: t5120-01
2010-09-17 09:32:16.342: [    CRSD][5837] SM: recoveryDone: 0
2010-09-17 09:32:16.348: [ CRSEVT][5846] Processing RecoveryDone
crs_stat -t on node 2:
oracle@t5120-02 $ crs_stat -t
Name Type Target State Host
ora.orcl.db application ONLINE ONLINE t5120-02
ora....l1.inst application ONLINE OFFLINE
ora....l2.inst application ONLINE ONLINE t5120-02
ora....01.lsnr application ONLINE OFFLINE
ora....-01.gsd application ONLINE OFFLINE
ora....-01.ons application ONLINE OFFLINE
ora....-01.vip application ONLINE ONLINE t5120-02
ora....02.lsnr application ONLINE ONLINE t5120-02
ora....-02.gsd application ONLINE ONLINE t5120-02
ora....-02.ons application ONLINE ONLINE t5120-02
ora....-02.vip application ONLINE ONLINE t5120-02

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:
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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.

Do all the weblogic application servers need to share storage in order to implement high availability?

I would like to understand if a shared storage is required for all application servers that will run weblogic + oracle identity manager. I've been using the following oracle guides : http://docs.oracle.com/cd/E40329_01/doc.1112/e28391/iam.htm#BABEJGID and http://www.oracle.com/technetwork/database/availability/maa-deployment-blueprint-1735105.pdf and from my interpretation both talk about configuring all the application servers with access to a shared storage. From an architecture standpoint, does this mean all the application servers need access to an external hard disk? if shared storage is required what are the steps to implement it?
Thanks,
user12107187

You can do it and it will work. But Fusion Middleware products have EDG to provide guidelines to help you to implement high availability.
Having a shared storage will help you to recover from storage failure, otherwise this might be a point of failure.
Enterprise Deployment Overview
"An Oracle Fusion Middleware enterprise deployment:
Considers various business service level agreements (SLA) to make high-availability best practices as widely applicable as possible
Leverages database grid servers and storage grid with low-cost storage to provide highly resilient, lower cost infrastructure
Uses results from extensive performance impact studies for different configurations to ensure that the high-availability architecture is optimally configured to perform and scale to business needs
Enables control over the length of time to recover from an outage and the amount of acceptable data loss from a natural disaster
Evolves with each Oracle version and is completely independent of hardware and operating system "
Best Regards
Luz

HANA High Availability System Vs Storage Vs VIP failover

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