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Center-Level Redundancy, cont.

Center-Level Redundancy, cont. Private/public connections to UCB Failover to Internet Tunnels Physically separate. plus 53 DSL, 20 Frame Relay, 124 Internet (NQ), 6 analog phone lines,and NSMP dial-up. 10. Node-level Resiliency & Redundancy ( cont ). Endpoint RAIDs

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Center-Level Redundancy, cont.

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  1. Center-Level Redundancy, cont. • Private/public connections to UCB • Failover to Internet Tunnels • Physically separate

  2. plus 53 DSL, 20 Frame Relay, 124 Internet (NQ), 6 analog phone lines,and NSMP dial-up 10

  3. Node-level Resiliency & Redundancy (cont) • Endpoint RAIDs • deep (~3 mos) Winston tanks of continuous waveform data from all µwave nodes • For catastrophic failure in Menlo • RAID recovery by SneakerNet. • Not a hot standby system as required by NIST. • No satellite, DSL, T1 data • T1 loops • Failover automatically • Monitoring notifies us of extended outages

  4. NCSS* Station Types *Does not include UNR

  5. UC Berkeley (BK) 45

  6. USGS NCSN (NC) 509

  7. USGS NSMP (NP) 186

  8. CGS (CE) 347

  9. PG&E (PG) 25

  10. Calpine (BG) 32

  11. UNR (NN) ~73

  12. CA Dept WR (WR) 18

  13. IRIS (TA) 8

  14. SCSN (CI) ~39

  15. 10 NCSS Partners ~1300 stations

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