Nonstop Database, HiRDB Version 9 Installation and Design Guide
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22.4.1 Estimating the number of ports that a unit will use
(1) HiRDB single server configuration
- Formula
value of pd_max_users ![[Figure]](FIGURE/ZUENG005.GIF) 4 + 1,000 |
(2) HiRDB parallel server configuration
With a multi-front-end server configuration, decide the values for f and F for each front-end server, which will become the total number of ports. Use the following formula to calculate the target number of port numbers for each front-end server.
- Formula
{b [k (B + F) + 1]
+ f (k B + D + 2) + d (F + 1)}
value of pd_max_users + 1,000 |
- b: Number of back-end servers inside the unit
- B: Number of back-end servers outside the unit
- f: Number of front-end servers inside the unit
- Each front-end server counts as either 1 or 0:
- If the front-end server is inside the unit: 1
- If the front-end server is outside the unit: 0
- F: Number of front-end servers outside the unit
- Each front-end server counts as either 1 or 0:
- If the front-end server is inside the unit: 1
- If the front-end server is outside the unit: 0
- d: Number of dictionary servers inside the unit
- D: Number of dictionary servers outside the unit
- k: 2
![[Figure]](FIGURE/ZUENG002.GIF)
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