disk size and backups

[Former Member]

Hello

I wander what is required disk size on hana when migrating from e.g Oracle to Hana?

E.g under oracle I have 1Tb database (and something more if I backup also at OS level)

What will I have under Hana ? How much to backup?

Thank you a lot

Jan

[muzavor · Accepted solution]

Dear Jan,

The first thing we need to perform before migrating from AnyDb to HANA is memory sizing. SAP provides specific notes for memory sizing of different SAP Applications as mentioned bel     ow

1793345 - Sizing for SAP Suite on HANA

1637145 - SAP BW on HANA: Sizing SAP In-Memory Database

1872170 - Suite on HANA memory sizing

1736976 - Sizing Report for BW on HANA  

The objective if the the above is to get the footprint of uncompressed DATA in AnyDB.

That forms one of the parameter for sizing the HANA DB.

Based on this sizing information one would use the suitable T-Shirt sized HANA Appliance from the hardware vendor. We then have to apply the

Traditional the RAM should be atleast 2x(uncompressed_DB / Compression factor) and the Disk space would be at least 3-4xRAM for persisitance layer and 1xRAM for logs.

The compression factor might be around 4-7 times depending on the type SAP application.

Regards

Arshad