Brocade
143-120 · Question #39
A customer is displaying Brocade DCX-4S switch statistics to determine the cause of a performance problem with tapes during a backup. The counter tim_txcrd_z (Time TX Credit Zero) is incrementing in…
The correct answer is C. Both values are displaying the same counter but may differ depending upon the sampling time. See the full explanation below for the reasoning.
Question
A customer is displaying Brocade DCX-4S switch statistics to determine the cause of a performance problem with tapes during a backup. The counter tim_txcrd_z (Time TX Credit Zero) is incrementing in the port statistics display and that the frame pacing counter on the RMF FICON Director Activity report is a non-zero value, but there is a slight discrepancy in the reported values. What would be the cause?
Options
- Aportstatsshow counter (tim_txcrd_z) is incremented when the DCX-4S port buffers are 0 during a 2.5
- BThe RMF frame pacing statistic is incremented when the DCX-4S port delays frames for buffer credits
- CBoth values are displaying the same counter but may differ depending upon the sampling time.
- DThe Director Activity report frame pacing counter is incremented when the DCX-4S port buffers reach 0 during
How the community answered
(36 responses)- A6% (2)
- B3% (1)
- C81% (29)
- D11% (4)
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