Konfiguracje wysokiej niezawodnosci

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Konfiguracje wysokiej niezawodnosci

• Wysoka niezawodnosc - ochrona systemu (protect
  the system) - HA - Klastry wysokiej
  niezawodnosci
• Ochrona organizacji (protect the organization)
  - rozdzial geograficzny

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Katastrofy

• Fizyczne uszkodzenie sprzetu komputerowego
• Uszkodzenie laczy komunikacyjnych
• Utrata zasilania

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Zródla bledów i koszty ich poprawy
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Redundancja

• informacji (dodatkowe bity kod Hamminga)
• czasu (powtórzenie dzialania - niepodzielne
  transakcje wady przejsciowe lub nieciagle)
• fizyczna
• aktywne zwielokrotnienie
• zasoby rezerwowe

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Klastry komputerów 1 High Availability

• Redundancja na poziomie komputera

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Klastry komputerów 2

• Redundancja na poziomie komputerów i macierzy

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Klastry komputerów 3

• Rozproszenie komputerów

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Typowa struktura HAC
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Macierz odlegla
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HAC z macierza odlegla i komputerem rezerwowym
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Dwa niezalezne klastry(drugi oczekuje na awarie)
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Podwójny klaster (fault tolerant)
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Systemy oprogramowania
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Porównanie MC/ServiceGuard firmy HP i HACMP
Cluster Solution firmy IBM
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Avoidance
Regeneration
Inclusion
Simplicity
Expertise
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Przyklad MC/Service Guard

• Simple operator commands
• Move packages to alternate nodes
• Perform hardware or software upgrades,
  maintenance
• Move packages back

Backward compatibility - Operating System -
MC/ServiceGuard
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MC/ServiceGuard HA Clusters

• Fast application failover
• LAN failure protection
• Survives multiple node failures
• No idle systems
• Workload balancing features
• Rolling Upgrades
• Online Reconfiguration

New Functionality

• Rotating standby
• Automatic failback
• 16-node support
• Tape Sharing
• EMS integration

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MC/ServiceGuard and Built-in Workload Balancing

• Balance workload after a node failure
• Minimize impact on remaining nodes

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PRM with MC/ServiceGuard Load Balancing

• Dynamic allocation of processing procedures
• Load balancing for normal and post-failure
  operation

If Node 1 fails
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Full-range Disaster Tolerant Solutions
Flexibility, Functionality
Continental Clusters
Metro Cluster

• Separate clusters
• "Push-button"automated failover
• Same planet!!
• Data sites at unlimited distance!

Campus Cluster

• Single cluster
• Automaticfailover
• Same city
• EMC SRDF
• Data sites up to 50KM apart

Local Cluster

• Single cluster
• Automaticfailover
• Same site
• Systems up to 10KM apart

• Single cluster
• Automaticfailover
• Same data center

Distance
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Campus Clusters fast, flexible HA local
disaster protection

• Builds on MC/SG capabilities
• Single cluster,multiple sites
• Continuous
• site-to-site data mirroring
• Based on Fibre Channel for speed up to 10 km
  distance

Heartbeat
10 km


FC HUB
FC HUB
10 km


FC HUB
FC HUB
HA Disk Array or EMC
HA Disk Array or EMC
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High Availability and Disaster Recovery(
przyklad )

• Highly redundant network with no single point of
  failure.

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High Availability and Disaster Recovery(
przyklad )
Clients
Clients
Building 1
Building 2
Campus Network
2x Serial, 1x Private Ethernet
Appl. Server 1
Appl. Server 2
Distance 10 km
Fibre Channel
Tape Library
SAN
Fibre Channel Raid 1
Fibre Channel Raid 2
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Skalowalnosc

• Can scale to very large configurations quickly

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HP MetroCluster with EMC SRDF Automated,
City-wide Fail-Over

• Enables rapid, automatic site recovery without
  human intervention
• Effective between systems in a network loop up to
  100km
• Provides very high cluster performance

• Backed by collaborative implementation, training
  and support services from HP
• Winner of coveted OSA Crossroads Award 1999 for
  Disaster Tolerant HA Solution

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World-Wide Data Protection with NEW HP
Continental Clusters

• Highest levels of availability disaster
  tolerance
• Reduces downtime from days to minutes
• Locate data centers at economically and/or
  strategically best locations
• Transparent to applications and data

• Push button or automatic (phase 2) failover
  across 1000s of km
• Supports numerous wide area data replication
  tools for complete data protection
• Comprehensive Support Services and Business
  Recovery Services for planning, design, and
  support

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HP MC/LockManager for Oracle Parallel Server
(OPS)

• Same protection functionality for applications as
  MC/SG
• Additional protection for Oracle database
• Parallel database environment for increased
  availability and scalability
• Horizontal scalability
• Aggregate processing power for database of all
  nodes
• Traditionally deployed for DW and Decision
  Support
• Moving into OLTP processing
• HP and ORACLE Cooperation
• Sizing and benchmarks
• IntegratedSupport Services

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Dolaczenie systemu archiwizacji ( przyklad )
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ClusterView Plus for Cluster Monitoring

• When integrated with OpenView IT/Operations, you
  can manage entire cluster
• Integration with Glance Plus PerfView

• Single point to monitor clusters
• Visual, map-based interface
• Monitor both HP-UX and NT systems in cluster
• ClusterView for Windows NT available

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Srodki zabezpieczen danych

• Macierze dyskowe RAID
• automatyczne biblioteki tasmowe
• urzadzenia do zapisu optycznego na dyskach CD.