Multi-Server-Configuration (Cluster)

Concept

  • Effective use with OSL Storage Cluster and "Shared Storage Clustering"
  • Full RAID system bandwidth
  • Full hard disk capacity
  • Shared Storage Cluster in homogenous environments requires no additional software for LUN masking or for reconfiguration of hard disk resources
  • RAID systems are easily set up
  • Global management with OSL Storage Cluster - easy and uncomplicated

[Translate to English:] Hardware

  • Multipath connection recommended
  • No switches required with sufficient ports on active/active RAID
  • With switches more computing resources can be connected
  • Fail-safe setup with at least 2 switches
  • With active/passive RAID check with your vendor for supported connection types
  • With switches check fanout (how many servers may share a RAID port)

Software

  • OSL Virtual Volumes not recommended for cluster (no global administration)
  • OSL Storage Cluster Base comfortable environment including multipathing
  • With OSL Storage Cluster in homogeneous environments no additional software for LUN-Masking required
  • With OSL Storage Cluster in homogenous environments no additional software for reconfiguration of disk resources required

Configuration with active/active RAID

  • Unlimited I/O Multipathing with OSL Storage Cluster Base
  • Universe Extensions with EMC Timefinder support
  • Do not use FC-Hubs
  • Connection without switches path failures and/or general failovers have no effect on other servers
  • With switches - consider a fail safe setup with 2 separate fabrics (refer to picture above)

Configuration with active/passive RAID

  • Single path connection not recommended
  • I/O multipathing requires additional software (e.g. EMC Powerpath)
  • Pay attention to the release matrix of your hardware vendor!
  • When using switches prefer a redundant architecture with two fabrics

Über OSL-Domains (Storage Domains) haben Sie weitere Möglichkeiten, die Administration des Storage variabel zu gestalten. Damit können Sie ein RAID-System so darstellen, dass auf der Ebene von OSL SC einzelne Ressourcen nur in der einen oder der anderen Domain ansprechbar sind. Sie teilen sozusagen das RAID-System in zwei virtuelle RAID-Systeme. Andersherum ist es auch möglich, zwei oder mehr RAID-Systeme in einem Pool - quasi einem großen virtuellen RAID-System - zusammenzufassen.