Contents
Introduction ..................................................................................................................................... 1
FreeStor Architecture ........................................................................................................................... 1
What you should know about the FMS .................................................................................................... 2
What you should know about the FSS .................................................................................................... 2
What you should know about the FDR .................................................................................................... 2
High Availability ............................................................................................................................... 3
Failover configuration connectivity ......................................................................................................... 3
IO Cluster and IO Multi-Cluster configuration connectivity ........................................................................ 5
Failover configuration ........................................................................................................................... 5
Failover Stretched Cluster and Tiebreaker configuration ....................................................................... 6
IO Cluster configuration ....................................................................................................................... 8
IO Cluster load balancing ................................................................................................................. 9
IO Cluster heartbeat monitoring ...................................................................................................... 10
IO Cluster error handling ............................................................................................................... 11
IO Cluster maintenance mode ......................................................................................................... 11
IO Multi-Cluster configuration ............................................................................................................. 12
IO Multi-Cluster – One node failure ................................................................................................. 13
IO Multi-Cluster and Tiebreaker ...................................................................................................... 14
IO Multi-Cluster – Two nodes fail on same site .................................................................................. 14
IO Multi-Cluster – Three node failure ............................................................................................... 15
Check IO Multi-Cluster settings ....................................................................................................... 16
Check IO Multi-Cluster status ......................................................................................................... 17
Check consistency ......................................................................................................................... 17
Zoning ............................................................................................................................................ 18
Client FC HBA settings........................................................................................................................ 18
Failover zoning .................................................................................................................................. 18
IO Cluster zoning ............................................................................................................................... 19
IO Multi-Cluster zoning ....................................................................................................................... 19
Stretched Cluster zoning .................................................................................................................... 19
FDR zoning ....................................................................................................................................... 20
Performance and Sizing .................................................................................................................. 21
Performance ..................................................................................................................................... 21
Using SafeCache or NVRAM with deduplication ...................................................................................... 22
SafeCache .................................................................................................................................... 22
NVRAM ........................................................................................................................................ 22
SafeCache vs. NVRAM .................................................................................................................... 23