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Replication

Multi-Site Replication — Built-In, No Add-Ons

Replication is built into every ShadowCradle appliance at no extra cost. Multi-site failover that costs 50% less, requires 70% less configuration, and actually works when you need it.

IT Director / CIO
  • RTO: 15–30 minutes for most workloads
  • Included in base license (vs. Datto $15K+ per appliance)
  • 45 minutes to configure multi-site failover
  • Reduce DR labor by 40%; eliminate per-site licensing
Solutions Architect
  • Automatic conflict resolution across multiple sites
  • Bandwidth-efficient (only changed blocks replicate)
  • Works across databases, VMs, cloud apps, files
  • One unified replication system - no fragmentation
System Administrator
  • One-click failover per appliance
  • Health monitoring built into dashboard
  • Zero additional licensing to manage
  • Set-it-and-forget-it - not something to debug at 3 AM

The Problem with Traditional Replication

Datto: Licensed, Layered, Expensive

  • Replication is a separate $15K–$25K module per appliance
  • Add another site? Another license fee
  • 2-appliance setup suddenly costs $40K more in licensing
  • Requires Datto specialists to set up correctly
  • Organizations skip replication because they can't justify the cost

StorageCraft: Manual, Fragmented, Complex

  • Replication isn't native - it's manual failover between separate systems
  • Requires external scripts/orchestration for automation
  • Different replication setup for VMs vs. databases vs. files
  • Inconsistent recovery procedures across workload types
  • High operational overhead; requires ongoing maintenance

How ShadowCradle Does It Different

Replication as a first-class citizen, not an afterthought.

Block-level deduplication
Only changed blocks replicate - 70% less bandwidth than full copy.
Built-in encryption
TLS 1.3 for all replication traffic; optional end-to-end encryption.
Automatic conflict resolution
Multiple sites can replicate bidirectionally without conflicts.
Network-efficient
Works over WAN with automatic compression for slow links.
Tested failover
Built-in health checks ensure failover will work when needed.
Cloud-aware
Replicate to cloud instances or on-prem appliances seamlessly.
Peer Discovery

Every Appliance is a Peer. Zero Configuration Required.

ShadowCradle does not have a primary and a replica. Every appliance on your network is a full peer. When you add a second appliance, they find each other automatically - no IP addresses to enter, no certificates to exchange manually, no "cloud console required." The same automatic discovery applies to backup agents: install the agent on any machine on the same network and it will locate the nearest appliance within seconds.

Automatic Appliance Discovery
Appliances announce themselves on the local network. A new appliance joins your replication mesh the moment it comes online - no manual pairing steps.
Agents Detect Local Appliances
Backup agents scan for ShadowCradle appliances on the LAN at install time. The agent connects directly to the closest appliance - no manual server address, no firewall rule hunting.
Seamless Three-Way Communication
Agent, appliance, and cloud all speak the same protocol. Data flows directly along the shortest path: agent to appliance over LAN, appliance to peer appliance over WAN, appliance to cloud for archiving.
You Stay in Control
Auto-discovery can be disabled in the appliance's Firewall and Network section. Lock down peer discovery to a VLAN, restrict agent pairing to a list of approved subnets, or require manual approval for each connection.

Feature Comparison: Replication

CapabilityShadowCradleDatto SIRIS
Replication included in base⚠️ $15K+ add-on
Automatic failover⚠️ Requires extra licensing
Multi-directional (A↔B↔C)⚠️ Hub-spoke only
Cloud-to-on-prem
Block-level bandwidth optimization
Cost per additional site✅ $0 (included)❌ $15K–$25K
Setup time✅ 30 minutes⚠️ 4–8 hours
Health monitoring

Real-World Use Cases

Multi-Location Healthcare Group

Challenge: HIPAA requires offsite backup AND disaster recovery. Traditional DR budget: $100K+.

Results:
RTO: 15 minutes (vs. 4+ hours with manual failover)
Setup: 2 days (vs. 3+ weeks for manual solution)
Cost: $35K for both appliances + replication (vs. $120K)
Savings: $85K year 1; $40K annually after

Financial Services Firm with Multiple Offices

Challenge: Compliance requires 4-hour RTO across all locations. Each office has its own backup.

Results:
All offices sync to central site every 4 hours
Regional failover takes 20 minutes
Compliance audit simplified (unified audit trail)
Estimated ROI: 18 months

Key Advantages

Included, not extra: No licensing premium for replication
Works everywhere: Databases, VMs, cloud apps, files - all unified
Automatic: Set it up once; it just works
Fast recovery: 15–30 minute RTO for most workloads
Cost-effective: 50% cheaper than Datto DR modules

Your Backup, Your Destination

Replicate to peer appliances, archive to cloud storage, or write to local NAS and external drives. Mix and match any combination.

Peer Replication
Appliance to Appliance
Agent
Agent
Agent
Appliance A - Site A
WAN
Appliance B - Site B
Agent
Agent

Any two appliances automatically discover each other and replicate bidirectionally. Failover to either site with one click. No hub, no hierarchy.

Cloud Archiving
Appliance to S3 / Cloud
Agent
Agent
Agent
Appliance
AWS S3
Wasabi
Backblaze B2
S3-Compatible

Send backups directly to any S3-compatible object store for long-term archiving. Deduplicated and encrypted before they leave the appliance.

Local Archiving
Appliance to NAS / External Drive
Agent
Agent
Agent
Appliance
NAS
SMB / NFS
External
USB / SATA

Write backups to a local NAS (SMB or NFS share) or a directly attached external drive. Air-gapped archiving with no cloud dependency.

You Are in Control
Use one destination or all three at once. Combine appliance-to-appliance replication for fast failover, S3 archiving for long-term retention, and NAS backup for local air-gap copies. Automatic peer and agent discovery can be restricted or fully disabled under Settings › Firewall & Network on each appliance.

Built-In Replication - Zero Extra Cost

Multi-site failover included in every ShadowCradle appliance.

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