To determine the required number of HADB nodes

1. Determine the following parameters:

   • Maximum number of concurrent users, n_users.

   • Average BLOB size, s.

   • Maximum transaction rate per user, referred to as NTPS.

2. Determine the size in Gigabytes of the maximum primary data volume, V _data.

   Use the following formula:

   V_data = n_users ^. s

3. Determine the maximum HADB data transfer rate, R _dt.

   This reflects the data volume shipped into HADB from the application side. Use the following formula:

   R_dt = n_users ^. s ^. NTPS

4. Determine the number of nodes, N _NODES,.

   Use the following formula:

   N_NODES = V_data /5GB

   Round this value up to an even number, since nodes work in pairs.