Shulou(Shulou.com)06/03 Report--

High availability:

Arbitration disk (folder): contains all the node information of the entire cluster and is given the right to vote by AM

Next active node

Based on "read operations" service: number of access objects and connections: connection-based load balancing

DNS polling: a domain name corresponds to multiple IP

HLB: device-based load balancing: F5 (cost)

SLB: load balancing based on application layer

NLB: load balancing based on Network Protocol

The third party

Based on "write operation" service: database, virtual machine: uniqueness of write object

Failover clustering: when a cluster node fails, transfer the service to other available nodes to ensure the continuous availability of the service

Multiple nodes that deploy the same service generally use shared storage (distributed storage) to provide high availability of services

Services: ensure the continuous availability of services

Type of service: based on operations on data and object-oriented

Physical: all physical nodes must use shared storage (SAN,S2D)

Arbitration: when a cluster node failure occurs: whether the cluster is working

All cluster nodes: AM (active Manager)

Based on voting mechanism: cluster nodes

Deployment of failover clusters: compute nodes: number of CPU cores

Memory size

Network card bandwidth

The sum of resources for all nodes

Network: advance: planning the physical network:

Virtual switch: resource pool: virtual switches with multiple nodes converge into one virtual pool, and virtual network cards can be configured to connect automatically.

Virtual network card

Access to the network: used to provide servic

Heartbeat (cluster) network: transmit heartbeat signals and write data (independent VLAN)

Storage network: transferring data (stand-alone switch)

Later stage: for virtual machine network planning

Storage: planning and connectivity of storage space (SAN,ISCSI,S2D)

Disaster recovery and backup solution

Cluster deployment operation: system environment preparation: computer name, network information: IP,MASK,GW,DNS

Logical environment: recommended AD domain environment: domain controller, nodes join the domain

Network environment: switches and network cards (physical & virtual), IP subnets of different networks

Storage environment: lab: configure ISCSI service: create a virtual disk file for storing data

Define the usage target object for the virtual storage

Backup: local: local media & local network

Database of the service: whether the backup will truncate the transaction log of the database of the service

Cloud backup: windows Azure backup

Backup object: virtual machine & physical machine

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