Advanced Storage Flashcards
What is iSCSI?
Allows accessing storage over an IP network
Sends SCSI commands over network to SCSI compatible devices
What is iSNS?
Internet Storage Name Service
Discovery & Configuration of iSCSI targets, for simplified deployment
What is DCB?
Data Center Bridging
Network traffic policy allows SAN and LAN to coexist (converged network) combat packet loss
What is MPIO?
Multiple network paths to storage devices provided redundant connections to storage
*can use DSM for load balancing across pipes
What is RPO in disaster recovery?
Recovery Point Objective
How much data loss can be endured
What is RTO in disaster recovery?
Recovery Time Objective
How long can business operate without specific application
What is disaster preparedness?
Ability to move workloads to another location
What is storage replica?
Volume-Based Block-Level replication
*files can be in use
What is synchronous replication?
Data must be written to all volumes in replication group before I/O is marked as complete
*0 data loss, can be slower
What is asynchronous replication?
Data is replicated to all volumes without waiting for acknowlegement
*ideal for low bandwidth, high latency connection
What is server-to-server storage replication?
Replication partnership across servers
*only supports manual failover
What is cluster-to-cluster storage replication?
Replication partnership across HA clusters
*only supports manual failover
What is a stretch cluster?
Replication partnership within single cluster
*supports automatic failover
What is the PoSH command to configure replication between volumes on servers or clusters?
New-SRPartnership
What is the PoSH command to view replication status?
(Get-SRGroup).Replicas