What are the blades in a server?

[Former Member]

I know CPU, memory and HD size. However I do not know what are the blades in a server.

Would you please explain a bit? Thanks!

[anindya_bose · Accepted solution]

Hi

r u installing BIA ( B I Accelerator)?

go through the links below to know what is blade server...

http://en.wikipedia.org/wiki/Blade_server

http://h71028.www7.hp.com/enterprise/cache/80316-0-0-101-121.html?tafcjnef=fy08&jumpid=tc|14808|blad...

[Former Member · Accepted solution]

Could you tell how to decide the number of blades needed using quick sizer? Thanks!

[anindya_bose · Accepted solution]

That depends on ur system usage, usage type...

generally 6 blade should be enough.... with one master and 5 slaves configuration...

Below notes should help you in determing the BIA config...But I guess, it will be decided by the team who will install BIA for your SAP system..

https://service.sap.com/sap/support/notes/1259294

https://service.sap.com/sap/support/notes/1010267

[Former Member · Accepted solution]

Could you copy and paste the notes for me bacause I do not have the OSS ID at this moment.

Thanks!

[anindya_bose · Accepted solution]

Symptom

You need to decide which main memory size you should use for the blades of your BIA landscape.

Other terms

BI Accelerator, sizing, main memory, RAM, 8 GB, 16 GB, 32 GB

Reason and Prerequisites

You need to decide which main memory size you should use for the blades of your BIA landscape.

Solution

Note: Based on the sizing of your system (considering main memory, CPU and including future needs of BIA resources) you should contact your hardware partner to get a BIA landscape optimally sized to your needs.

Supported main memory sizes

Currently, the use of blades with 8GB, 16GB or 32GB RAM is supported for BIA depending on blade and CPU architecture and depending on the hardware vendor.

Recommendations

SAP recommends to use the latest generation of blades with 16GB main memory.

This allows an optimal distribution of BIA indexes even for high loads due to a great amount of users. In addition to that, indexing performance profits if more blades are used in a BIA landscape.

Use of 32GB main memory size to avoid additional hardware costs

If the sizing for the BIA leads to a number of blades with 16GB main memory with just a few blades more than the number of blades fitting into an enclosure, then the use of blades with 32GB main memory should be preferred.

Example:

Assuming that your BIA sizing requires 480GB, which results in 30 blades with 16GB main memory each. Then you should order 15 blades with 32GB main memory instead, so you can avoid the usage of an additional enclosure. In addition to that, there is space for additional blades that can be used as backup blades.

Use of blades with the same main memory size

Heterogeneous BIA landscapes are supported in BIA 7.0 Revision 47 and later. But SAP recommends to use blades with the same main memory size for the best possible performance in scenarios with high loads due to a great amount of users.

Use of 8GB RAM main memory size

BIA blades with only 8GB RAM should be used only for very small BIA landscapes up to four blades. Use of those blades was introduced to fit to the needs of the SME (Small and Medium Enterprises) market.

[anindya_bose · Accepted solution]

Symptom

You want to perform sizing for the BI Accelerator.

Other terms

BIA, TREX, BI Accelerator, sizing, blades, Quicksizer

Solution

The sizing for BI Accelerator can now be done in the SAP Quicksizer.

http://service.sap.com/quicksizer > Create Project and select SAP NetWeaver BI

Most of the data captured is the same as for BI sizing. If you have already performed a BI sizing, you can Copy & Paste the values for the BIA sizing.

You must create a new QuickSizer project, otherwise the BIA options will not appear.

If you already have a BI system (loaded with data), then the program and method described in SAP note 917803 is recommended

Refer to Thread on SDN posted by Marc Bernard for some additional info

Also check : https://www.sdn.sap.com/irj/sdn/nw-bwa

Edited by: Anindya Bose on Aug 12, 2009 2:52 AM