Hardware Sizing for high Availability system

Hi,
I have to perform Hardware sizing for high Availability system for a fresh installation and I am quite new to this area.
It will be a User based sizing.
Total user count 150.
105 - Info-consumer Users
40 - Executive Users
05 - Expert Users
Can you please let me know what will be the best approch and what are the factors have to consider to perform the hardware sizing for high Availability system
Your support will be appriciated.
Regards,
Basis

Hi Sebastian,
Thanks for your response. Yes, I am going through the doc.
Solution will be BW 7.4 on HANA. If you can give me what are the factors I have to consider will be very helpfull for me.
I already did sizing for standalone installation, but client is looking for Hardware Sizing for high availability system.
Regards,
Basis

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I have read the SAP Note 181543 and when I License a system and make the switchover to the Second Node, it (Node 2) hasnt the licenses actives.
Later, I have balancing again to Node 1 and in operating system I executed with <sid>adm saplicense -show but the result is this:
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Hi
try to install the license through SLICENSE and click on. Click on new license and upload the license from the location (Download or copy the .txt file on system).
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Thanks for your response. Yes, I am going through the doc.
Solution will be BW 7.4 on HANA. If you can give me what are the factors I have to consider will be very helpfull for me.
I already did sizing for standalone installation, but client is looking for Hardware Sizing for high availability system.
Regards,
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SAP Hardware sizing for "User-Based sizing".

Short Text
User-based Hardware Sizing
Long Text
Dear SAP Support,
We would like to know the SAP Hardware sizing for "User-Based sizing".
Our queries is
1. In "User-Based sizing", What we have to consider,
the number of users are calculated in the basis of
Concurrent users in the system in a given point of time
or
total number of users logged into the systems in the whole day?
We have referred the SAP document "Sizing SAP System" and the above
point are not clearly mentioned.
Regards,

As the document says there are number of possible definitions for "users" in SAP context...
For understanding assume that no of users logged to the system they consume different resources / areas in the system, some login to the system whole day but they don't work whole day, some user open multiple session to work while other open multiple session but they don't exactly work on it which means (every new session consume memory/resources) like you said their are concurrent users wherein they work and consume resources (SAP WPs)
So before finalizing the sizing first compare the both reports (user based, thorhgput) and read the advantages and disadvantages for both. You can also consult with SAP / Account Manager to help you
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Please remember to click "Mark as Answer" or "Vote as Helpful" on the post that answers your question (or click "Unmark as Answer" if a marked post does not actually
answer your question). This can be beneficial to other community members reading the thread.
This forum post is my own opinion and does not necessarily reflect the opinion or view of my employer, Microsoft, its employees, or other MVPs.
Twitter:
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Distribution of Copywrited material is Illegal.... and so is asking for them.
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Just an example...
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Hi,
We are having ECC 6.0 SR3 Hight-Availability system on windows cluster environment.
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Node-1 is having CI, ASCS, ERS & DATABASE
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I've check all the pre-requisites for sql upgrade.
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Hi Venkat
1. Could you share your ECC support package level & also you can check the PAM
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Hi All
Our team is required to do quick sizing for a SCM 5.0 Demand Planning system with Livecache. The DEV and QAS is already available but not being used at all but now we need the quick sizing for the production box. I have never done any quick sizing, detailed help is appreciated. I have gone through the service.sap.com/quicksizing for demand planning it shows 3 input tables only for Throughput sizing - Time Series, DP Run, DP Users. The APO functional guys entered some numbers but not sure what to do next as the Calculate Result shows information Iam not able to understand.
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Hello Ali,
First of all I am not a BASIS consultant and hence it would not be prudent for me to comment on hardware configuration reuqired in your case.
Secondly I do not understand what you mean by Quicksizer has been shut down. It is available online at <a href="http://service.sap.com/quicksizer">Quicksizer Tool</a> in Service Marketplace.
There is good amount of documentation available in the website giving details on the basis of computation of different parameters. Again SCM Hardware Configuration is not just dependent on the number of users but the functional requirements as well.
Thirdly - I cannot explain how SAPS concept is related to SCM Quicksizing. Per my understanding the SAPS concept is an hardware-independent benchmark of throughput which is an indicator of the processing capabilities required at peak loads. SAPS will determines the number and processor speed on your Application Server depending on the processor capabilities. Most hardware vendors provide datasheets with SAPS capabilities.
Suggest you go through the document "Background: Sizing mySAP Business Suite" under Sizing Guidelines >> General Sizing Procedures.
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Hi Experters,
Not sure whether this is right forum to post this message.
If anybody has already captured user experience for the failover environment, will appreciate their help on this. I will give overview of environment. Using PowerHA for ASCS/SCS failover, ORACLE Data Guard for Database failover.
Trying to capture user experience for the failover environment
if ASCS/SCS fail,
App Server Fail (using F5 Load Balancer which should reroute, unless all app server fail),
Database fail
with following cases:
1. User logged in, NO ACTIVITY. I believe NO IMPACT either ASCS/SCS fail or DB fail or App Server fail.
2. User logged in and run a transaction before failover.
     What will happen in case of ASCS / SCS
     What will happen in case of DB failover
   and what will happen in case of App server fail (NO High Availability, only redundant app servers.      MAX 4 app servers for each component)
3. User logged in and run a transaction during failover.
   What will happen in case of ASCS / SCS
     What will happen in case of DB failover
   and what will happen in case of App server fail (NO High Availability, only redundant app servers.      MAX 4 app servers for each component)
Not sure which one possible or not. Some case thinking system will hang need to refresh. Some case hour glass and then come back once failover complete. and some case session closed completely.
Thanks for your time and god bless the knowledge you have.
Saroj

just try to answer as much as I can (guess)
> 1. User logged in, NO ACTIVITY. I believe NO IMPACT either ASCS/SCS fail or DB fail or App Server fail.
DB failed and SCS failed won't have any impact to enduser, but if app server failed, the user session will lost, user will see a pop up error message at their SAPGUI.
> 2. User logged in and run a transaction before failover.
>      What will happen in case of ASCS / SCS
user wont'be effected during failover if user is doing nothing but idle (replica enqueue is working before failover)
>      What will happen in case of DB failover
App server won't be able to do much thing but it's work processes into reonnecting status. it should resume (reconnect to DB) when failover is compoleted. So user should be able to continue the sessions.
>    and what will happen in case of App server fail (NO High Availability, only redundant app servers.      MAX 4 app servers for each component)
user sessions in failed app server will be lost. However user should be able to logon agan if
1) logon via group, and
2) within the group, there is at least one appl server alive.
> 3. User logged in and run a transaction during failover.
hanging or
>    What will happen in case of ASCS / SCS
if the transaction is using enqueue service, for example, then user will get error message. otherwise, user won't be effected, e.g. if use is just search a list of order. user wont to able to logon via group during the failover.
You also should be pepared for user connected through message server, .e.g. http request dispatching through message server directly , or via web dispatchr. user wont be able to connect during the failover.
>      What will happen in case of DB failover
user will get error message, transaction will be aborted.
>    and what will happen in case of App server fail (NO High Availability, only redundant app servers.      MAX 4 app servers for each component)
very similar case as case 2.

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

Best practice for High availability design, HSRP

Hi,
I am planning to create High Availability for LAN to WAN connectivity.
But I want to know your opinion about the best way how to do this. I googled for a solution/best way how to do this, but I didn't found in my opinion right answer.
The situation:
I have 2 3945E Routers and 2 3560 switches. The design that I am planning to implement is below.
The main goal is to have redundant connection, whatever one of the devices will fail. For example, if the R1 will fail, R2 should become active, if the SW1 will fail, the SW2 will take care about reachability and vice versa. The router 1 should be preferred always, if the link to ISP isn't down, because of greater bandwidth. So why am I drown 2 connections to 2 separate switches. If the SW1 will fail, I will still have a connection to WAN using R1 router.
The Router interface should be configured with sub interfaces (preferred over secondary IP address of interface), because more than 10 subnets will be assigned to the LAN segment. The routers have 4 Gi ports.
HSRP must be enabled on LAN side, because PC's on LAN must have redundant def. getaway.
So, the question is - what is the best and preferred way to do this?
In my opinion, I should use BVI and combine R1 routers 2 interfaces in to logical one and do the same for the R2.
Next, turn the router in to L3 switch using IRB and then configure HSRP.
What would be your preferred way to do this?

Hi Audrius,
I would suggest you to go with HSRP. GLBP you will use where you want load balance.
I think the connectivity between your Routers (3945) and switches (3560) is gigabit connection which is high speed. So keep one physical link from your switches to each router and do HSRP on those router physical interfaces.
In this way you will have high availability like if R1 fails then R2 will take over.
Regarding the config see the below which I have for one of my Customer DC.
ACTIVE:
track 1 interface GigabitEthernet0/0 line-protocol
track 2 interface GigabitEthernet0/0 line-protocol
interface GigabitEthernet0/1
ip address 10.10.10.12 255.255.255.0
ip nat inside
ip virtual-reassembly
duplex full
speed 100
standby use-bia scope interface
standby 0 ip 10.10.10.10
standby 0 priority 110
standby 0 preempt
standby 0 authentication peter2mo
standby 0 track 1 decrement 30
standby 0 track 2 decrement 30
STANDBY:
track 1 interface GigabitEthernet0/0 line-protocol
interface GigabitEthernet0/1
ip address 10.10.10.11 255.255.255.0
ip nat inside
ip virtual-reassembly
duplex full
speed 100
standby use-bia scope interface
standby 0 ip 10.10.10.10
standby 0 priority 90
standby 0 authentication peter2mo
standby 0 track 1 decrement 30
Please rate the helpfull posts.
Regards,
Naidu.

Need to add a second weblogic server for high availability

I have a weblogic 10.3.3 server with forms and reports 11.1.1.3.
I have an adminServer, WLS_FORMS and WLS_REPORTS managed servers setup.
This was setup with the wizard, so the WLS_FORMS is in the cluster_forms cluster group and WLS_REPORTS in the cluster_reports group.
I now need to add a second server with forms and reports also to act as one big server and provide high availability and load balancing.
How do I achieve thsi, is there a wizard that will do this?
The two servers are setup in exactly the same way, with the same versions of Weblogic and Forms and Reports.
Thanks in advance.

I do not know "reports 11.1.1.3" application, but from your description this application is already targeted on a clustered configuration.
So it should be sufficient to add 2 new instances in the WebLogic domain "WLS_FORMS_2", "WLS_REPORTS_2", include them into the existing clusters and add a load balancer (like apache + wleblogic-plugin) that will balance requests on instances.
I never heard of wizards to create such clustered environments. However it is not hard to do:
1- Install binaries on the new machine
2- Create the domain configuration directory on the new machine using config.sh wizard in the same way you have aleady done with the first machine.
In this step you can create a clone of the existing domain, but it is enough to create a domain with the same name and the same admin instance.
Instead of using config.sh, you can also copy the domain directory from the existing machine and change diretories in scripts if needed.
The domain configuration is needed only to find the binaries, the basic domain files common to all installations, and to allow startup scripts (see point 4-) to connect to the admin and download the domain/instance configuration.
3- Configure the new instances on the existing WebLogic console
4- Create startup scripts for "WLS_FORMS_2", "WLS_REPORTS_2" on the second machine
Bye
Mariano

BIA Load Check delivers wrong result for high availability

Hi all,
has anyone noticed the BIA Load Check (Function CHECK_BIALOAD_CHECK of class CL_RSDDTREX_SERVICE) handles a high-availability setup in the wrong way?
We have 2 times x blades, with each blade being mirrored in a high-availability setup (dedicated backup mode).
That means our usable space is: x * memory_size of blade
However, the load check calculates the load by doing:
load_factor = size_of_all_indexes / SUM(memory_per_blade)
=> If we have 36 GB/blade and 2 blades + 2 backup blades, total usable memory should be 236 = 72, and NOT 436 = 144!
So the CALCULATED load_factor is only half of the ACTUAL (real) load factor => the alerting for BIA overload is never triggered!
Do we need to write our own load check function then?
Thanx,
Hendrik
Edited by: HMaeder on Jan 20, 2010 5:44 PM

Hello Hendrik
I believe your finding is correct. Backup blades should not be taken into consideration for total memory. Please open a customer message so SAP development can analyze the issue and provide a solution (just cut&paste your posting).
Regards,
Marc
SAP NetWeaver RIG

Hardware Sizing for high Availability system

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