Hot Standby DR

DR at Scale Without the Cold-Restore Wait.

Keep standby workloads ready across CloudStack, OSSEA or Azure so failover is an activation workflow, not a restore project.

Sendense gives operators test, planned and emergency failover modes for large estates, with RPO tracking, readiness checks and evidence attached before the day you need it.

Sendense hot standby disaster recovery path for large VM estates

15m

Target RPO

<5m

Failover Target

500+

VM Runbook

Open

DR Site

Failover modes

Test, Plan and Respond from One Runbook.

DR at scale breaks when every event becomes a one-off recovery project. Sendense keeps the operator workflow consistent across validation, planned movement and emergency activation.

01

Test Failover

Start protected workloads in an isolated test lane, validate services, capture evidence and roll back without touching production.

Non-disruptive validation
Isolated network path
Rollback after test
02

Planned Failover

Use a controlled final sync and commit window for maintenance, datacenter moves or platform migration events.

Final sync before cutover
Commit or rollback
Operator-controlled window
03

Emergency Failover

When a site is down, activate the hot standby estate from the destination instead of waiting for a restore project to complete.

Standby VMs already staged
Estate-level activation
Recovery path already known
Hot Standby Runbook

Standby VMs Are Prepared Before the Site Fails.

The destination is kept close to production, with boot state, network intent and checks ready before an incident turns into a deadline.

01

Protect

Select protected workloads, destination targets, RPO policy and failover runbook groups.

02

Sync

Changed blocks move continuously to the DR site so standby VMs remain close to production.

03

Stage

Boot metadata, network intent and destination placement are prepared before a disaster.

04

Verify

Run test failovers, pre-flight checks and boot evidence without disrupting production.

05

Activate

Trigger test, planned or emergency failover from the runbook when the business needs it.

06

Govern

Track RPO, status, test history and recovery evidence across the estate.

Test

Without Disruption

Validate recovery in an isolated lane while production keeps running.

Plan

With Final Sync

Use controlled cutovers for maintenance or migration windows.

Respond

When Sites Fail

Activate staged workloads rather than waiting for cold restore.

Prove

Readiness

Keep evidence, status and audit trail attached to the runbook.

Operational readiness

DR Readiness Lives in the Workflow.

Replication, target selection, test isolation and evidence capture are not separate projects. They are part of the same disaster recovery path.

Hot Sync Before Activation

Replication keeps the destination close enough that failover is a controlled switch, not a rebuild.

Targets Fit the Runbook

Use CloudStack, OSSEA or Azure as recovery targets without forcing the whole estate into one platform choice.

Testing Has a Safe Lane

Start clean-room style validation runs without polluting production networks or changing live workloads.

Readiness Is Evidence

Boot checks, validation status and audit history turn DR readiness into proof rather than hope.

DR site economics

Reduce Premium Platform Cost for Idle DR.

CloudStack, OSSEA or Azure can become the recovery target while Sendense keeps protection, failover workflow and readiness evidence intact.

Lower-Cost DR Still Needs Enterprise Control.

Moving DR targets to open infrastructure lowers standby cost, but the recovery model still needs RPO tracking, test workflow, destination protection and audit history.

Savings vary by estate, platform contracts, destination hardware, bandwidth and operational model.

Traditional DR site

High standby cost

VMware DR licenses$$$$$
Duplicate backup stack$$$
Dedicated DR hardware$$$$
Private circuits$$$

Sendense DR at Scale

Open target economics

CloudStack / OSSEA targetOpen DR target
Sendense protectionUnified
Standard infrastructureYour choice
Outbound TLS tunnelNo circuits
The target platform can change. The recovery process, evidence model and operator experience stay consistent.

Multi-site readiness

Know Which Sites Are Ready Before You Need Them.

Large DR plans fail in the gaps between sites, networks, application groups and evidence. Sendense keeps site readiness visible and actionable.

Ready

London HQ

Protected workloads142 VMs
Current RPO12m
ConnectionTLS tunnel
Ready

New York DC

Protected workloads89 VMs
Current RPO14m
ConnectionTLS tunnel
Ready

Singapore Site

Protected workloads215 VMs
Current RPO11m
ConnectionTLS tunnel
Ready

Azure Target

Protected workloads54 VMs
Current RPO15m
ConnectionTLS tunnel
Health Monitoring
Pre-Flight Checks
RPO Compliance
Audit Trail

DR at Scale FAQs

FAQs for DR at Scale.

Short answers about hot standby recovery, testing, failover targets, destination platforms and readiness evidence.

01What Makes Sendense DR at Scale Different?

Sendense treats DR as an always-prepared operating model. Workloads replicate to a hot standby target, failover modes are built into the workflow, and readiness evidence is tracked before the emergency.

02Can Sendense Run DR on CloudStack or OSSEA?

Yes. Sendense can use CloudStack, OSSEA or Azure as recovery targets, which helps organizations avoid paying VMware-style licensing on infrastructure that exists mainly for disaster recovery.

03How Do Test Failovers Avoid Production Impact?

Test failovers use an isolated lane so standby workloads can boot and be validated without taking over production networking or changing live systems.

04What RPO and Failover Targets Are Supported?

The page highlights common targets such as 15-minute RPO and sub-five-minute failover for prepared runbooks. Actual results depend on estate size, bandwidth, storage, application dependencies and destination design.

05Does DR Readiness Produce Evidence?

Sendense keeps health status, pre-flight checks, validation results and test history close to the recovery workflow so DR readiness is easier to prove to operators, customers and auditors.

Make DR Readiness Operational Before the Incident.

Review your estate, failover modes, RPO targets, destination platform and readiness evidence model with Sendense.