SAP HANA Storage Sizing Recommendations by Vendor

[Former Member]

Hello,

Our SAP HANA certified vendor is recommending the following production DB storage sizing parameters:

Shared - 1.5 x of Total Memory

Data - 3.0 x of Total Memory

Log - 1.5 x of Total Memory

For a Local disk SAP HANA DB Full Backup ( directory ) - 3.0 x of Total Memory

My question...Is the sizing for the local DB full backup correct...Having to allocate 3.0 x of Total Memory ?

Thank you in advance...

Cheers !

[Former Member]

Hi Gregorio,

As there is a HANA Certified vendor involved we are assuming you are working on a HANA appliance

rather than a TDI Setup, let us know if this is not the case

We have HANA Appliance in Production and I have noticed the approach of the HANA Certified Vendor is to try and allocate large disk space at the time of the setup to avoid further disk space allocations. With TDI this process is easier as we can allocate disk space as and when needed

Practically a data backup contains payload of the data volumes so the size depends on the size of the data volumes and the retention of the files. Additionally HANA needs space for log backups(again depends on how frequently data backups are being taken and old log backups are cleaned up). So I assume the vendor is considering the disk space for Data + Log backups

Please refer the HANA TDI Storage requirements document below for better understanding of the sizing

http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/70c8e423-c8aa-3210-3fae-e043f5c1c...

Hope this helps

[Former Member]

Hi Gregorio.

Yuksel, just mentioned the most important points.

But you have to take in mind the future size of your landscape. SAP has the "T-Shirt" sizes for customers to choose which fit best.

Independent of the tshirt size you choose, SAP also recomends to increase that value, so that case, there is a need to increase the resources, you re not in the limit.

As for backup, please dont forget that, any backup data must NOT be stored in this space, but should rather be moved to external storage media.

Regards.

Osvaldo Ferreira

[yakcinar]

Hello Gregorio,

Below figure is taken from SAP's Hana Administration book.

As you could see there are 2 approaches for HANA platform. Appliance and TDI. In 1st you chose your vendor and buy HANA HW and SW as appliance. In 2nd you create your own HANA platform using your data center and hw. (your hw must be certified by SAP)

Since you have choosen the HANA platform as appliance then your appliance must include disks for DB (1xRAM),

Log (,5xRAM at least 512 GB)

Shared/Trace (1xRAM)

Backup (1xRAM)  - Can change according to your backup retention strategy. 1 day, 2 days, ....

For copy purposes (1xRAM)

SAP recommends this for safety because you cannot add disks to your appliance in short time when it is online.

Regards,

Yuksel AKCINAR