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Datacenter & Cloud · High Availability

High availability systems — a failure doesn't have to stop your business

We design IT environments with redundancy at every level — servers, storage, network, and power. Automatic failover, data replication, and HA clusters guarantee business continuity when hardware fails.

Ask about HA → Service scope
Klastry HAautomatyczny failover
Replikacjasynchroniczna
RTO / RPOdefiniowane kontraktowo

What we design

High availability solution scope

High availability isn't a single product — it's an architecture that eliminates single points of failure at every infrastructure level.

HA clusters for virtualization

VMware vSphere HA, Hyper-V Failover Clustering, Proxmox HA — automatic VM startup on another cluster node after a host failure. Switchover time: seconds to a few minutes.

Application clusters

Windows Server Failover Cluster for SQL Server, Exchange, File Server. Pacemaker/Corosync clusters for Linux environments. Active-active and active-passive — mode selection matched to application requirements.

Replikacja storage

Synchronous replication between arrays (RPO=0) or asynchronous (RPO minutes). Storage vMotion, Synology replication, and enterprise arrays. Automatic switchover to the replica on failure.

Network redundancy

Bonding/LACP on servers — a single NIC failure doesn't interrupt communication. Redundant core switches with VRRP/HSRP. Dual uplinks with automatic failover.

Disaster Recovery Site

Secondary datacenter (DC) or cloud as the replication target. VMware Site Recovery Manager (SRM) for DR automation. DR testing without affecting production.

HA documentation and testing

HA processes must be tested regularly — they don't work if they're only invoked the first time during a real failure. We deliver test procedures, a testing schedule, and reports confirming they work.

Certified partners

Technology partners

HPE

HPE

HPE SimpliVity and Alletra — built-in HA and replication in HCI platforms. HPE ProLiant with iLO for failure management.

Dell Technologies

Dell Technologies

Dell VxRail with vSAN Stretched Cluster — HA between sites. PowerStore with synchronous Metro Volume replication.

Microsoft

Microsoft

Windows Server Failover Clustering and SQL Server AlwaysOn Availability Groups — native Microsoft HA.

Proxmox

Proxmox

Proxmox HA Manager and Ceph — HA cluster without VMware licensing costs.

How much does an hour of downtime cost your company?

For many companies, an hour of ERP or e-commerce downtime means tens or hundreds of thousands in losses.

The cost of HA deployment is usually a fraction of the cost of one serious outage. We help calculate the RTO and RPO the company actually needs — and design an environment that guarantees them.

Ask about HA →

FAQ

High availability questions

HA (High Availability) protects against hardware failure in the same datacenter — automatic switchover in seconds to minutes, the application keeps running. DR (Disaster Recovery) protects against a disaster affecting the entire location (fire, flood, power) — switchover to a backup DC in minutes to hours. A good environment has both.
RTO (Recovery Time Objective) — how much time can elapse from a failure to recovery. RPO (Recovery Point Objective) — how old data can be after restoration (how much we can lose). An HA cluster gives RTO of a few minutes and near-zero RPO. DR with asynchronous replication — RTO of a dozen minutes, RPO of a few minutes.
Yes — HA requires at least 2 servers in a cluster and usually shared storage (SAN/NAS) or HCI. The additional cost is typically 50–100% of one server, but it also eliminates the need for a spare server "on the shelf". The cost of downtime often far exceeds the cost of deploying HA.
At least quarterly — simulating a cluster node failure and verifying that VMs start correctly on another host. DR testing — once a year or after every major infrastructure change. An untested HA is a false sense of security.