Seamless Replication and High Availability

RSF-1 Layered Over Your Existing Systems

Enable HA, replication, and failover without replacing your current NAS or storage platform.

What RSF-1 Delivers

RSF-1 provides synchronous and asynchronous replication, automatic failover orchestration, and fencing
mechanisms that ensure data consistency during planned or unplanned outages.

Non-Disruptive Architecture

RSF-1 allows the creation of local HA pairs, stretch
clusters, and share-nothing configurations over existing
systems without re-architecting or reformatting data
volumes.

Works with existing storage platforms

No data migration required

Preserves existing configurations

Holstein IT Solutions – UK and Ireland implements RSF-1 for high availability, providing replication, automatic failover, and fencing to ensure data consistency and non-disruptive architecture across enterprise systems.

Key Benefits

Non-disruptive deployment

Add HA and replication capabilities without reinstalling the storage OS

Flexible topologies

Local, share-nothing, and stretch cluster options

Automated failover

Monitors node and service health for immediate recovery

Migration path

Supports minimal downtime migrations and rollback options

Architecture & Topologies

Choose the topology that best fits your availability requirements and infrastructure constraints.

Topology
Description
Availability
Complexity
Local HA (Active/Passive)

Critical applications requiring local redundancy

Two nodes with RSF-1 monitoring service and automatic failover. Ideal for critical workloads requiring continuous uptime.

99.9%

Medium

Share-Nothing Cluster

Distributed applications with horizontal scaling

Independent nodes with mirrored or replicated storage. RSF-1 manages synchronization and failover

99.9% +

High

Stretch HA

Geographic disaster recovery requirements

Nodes deployed across two sites with synchronous or asynchronous replication and quorum control. Supports low-latency inter-site links.

99.9%

Very High

Mixed Environment

Legacy system modernization projects

RSF-1 bridging between legacy NAS and modern nodes for gradual migration.

99.9%

High

Step-by-Step Deployment

Our proven deployment methodology ensures successful RSF-1 implementation with minimal risk.

1. Assessment

Inventory existing OS, storage layout, network
latency, and recovery objectives (RTO/RPO)

2. Design

Select replication mode (sync/async), fencing method, and topology

3. Prechecks

Validate network connectivity, NTP synchronization, and snapshot consistency

4. Installation

Deploy RSF-1, initialize replication, and configure cluster control

5. Validation

Execute controlled failover tests and integrity verification

6. Handover

Deliver documentation, runbooks, and define ongoing monitoring procedures

Prerequisites & Compatibility

Minimum network bandwidth and latency requirements vary by topology

NTP synchronization required across all nodes

Supported filesystems include ZFS, ext4, XFS, and Btrfs depending on OS

Firewall rules must allow RSF-1 control and replication traffic

Mandatory backup snapshot prior to activation for rollback assurance

Migration & Rollback Plan

Secure deployment with fallback options

Data replication to target node before cutover

Controlled switch-over window with test failover validation

Immediate rollback supported through primary failback

Ready to
Implement RSF-1?

Let our experts assess your environment and design
the optimal RSF-1 topology for your needs.