What is the difference between Azure Backup and Site Recovery?

Azure Backup is for data and VM backup with up to 99 years retention. Site Recovery is for disaster recovery with full workload replication and automatic failover within minutes.

What RPO/RTO can we achieve?

With Azure Site Recovery we achieve RPO 30 seconds to 15 minutes and RTO under 2 hours. For critical systems we implement active-active architecture with near-zero RPO.

How does geo-redundant backup work?

GRS automatically replicates backups to paired Azure region hundreds of kilometers away for protection against regional outages.

Can on-premise servers be backed up to Azure?

Yes, using Azure Backup Server (MABS) or MARS agent we backup Windows/Linux servers, SQL, SharePoint and other workloads directly to Azure.

How do you test DR plans?

We perform planned DR drills with isolated failover that does not affect production. Automated tests run monthly with success reports.

What are Azure DR costs?

Costs depend on data volume and compute requirements. Site Recovery costs about 25 USD/server/month plus storage. Backup is charged per GB of protected data.

Do you support multi-cloud DR?

Yes, we implement DR scenarios between Azure, AWS and on-premise. Azure Site Recovery supports VMware and Hyper-V replication.

How long does full environment recovery take?

With prepared recovery plan and Site Recovery we recover full environment within 2-4 hours. For critical apps we use hot standby with failover under 15 minutes.

What is backup retention?

Azure Backup supports retention up to 99 years. We implement GFS (Grandfather-Father-Son) schemes with daily, weekly, monthly and yearly recovery points.

How do you handle ransomware protection?

We implement immutable backups, soft delete with 14-day protection, MFA for critical operations and air-gapped copies in isolated vault.

Can DR processes be automated?

Yes, using Azure Automation and Recovery Plans we define startup sequences, pre/post scripts and automatic notifications.

What is Azure Backup service availability?

Azure Backup has 99.9% SLA for the service. Data is protected with 11 nines durability thanks to LRS/GRS replication.

Do you support database backup?

Yes, native backup for SQL Server, SAP HANA, PostgreSQL and more. Application-consistent snapshots ensure consistent recovery.

How do you monitor backup status?

Central monitoring via Azure Monitor and Backup Center. Alerting on failures, compliance reports and dashboards for management.

Azure Backup & DR

Backup & Disaster Recovery

Komplexní ochrana dat a business continuity na Azure platformě

Azure Backup

Centralizované zálohování VMs, databases, files a applications

Azure Site Recovery

Disaster recovery orchestration s automatickým failover

Cross-Region Replication

Geo-redundantní replikace pro kritické workloads

Instant Recovery

Rychlá obnova s instant restore a file-level recovery

DR Testing

Non-disruptive DR drills a recovery validation

Compliance

Backup policies pro regulatory compliance

Technický deep-dive: Backup & DR

Architektura, RTO/RPO strategie a best practices pro Azure Backup a Disaster Recovery

Osvědčené postupy pro Backup & DR

RTO/RPO definice per workload

Ne všechny systémy potřebují stejné RTO/RPO. Tier 1 (minutes), Tier 2 (hours), Tier 3 (days). Náklady odpovídají požadavkům.

3-2-1 backup pravidlo

3 kopie dat, na 2 různých médiích, 1 kopie off-site. Azure Backup s GRS/GZRS splňuje toto pravidlo nativně.

Immutable vaults

Aktivujte immutability na Recovery Services Vault. Chrání zálohy před ransomware a accidental deletion.

Regular DR testy

DR plán bez testování je jen dokument. Testujte failover kvartálně. Azure Site Recovery test failover je non-disruptive.

Multi-region architektura

Paired regions pro automatický geo-failover. Availability Zones pro HA v rámci regionu. Traffic Manager pro routing.

Application-consistent backup

VSS snapshots pro Windows, pre/post scripts pro Linux. Zajistěte konzistenci databází a aplikací.

Srovnání DR strategií

Strategie	RTO	RPO	Náklady
Active-Active	~0 min	~0 min	Nejvyšší (2x infrastruktura)
Hot Standby	<15 min	<5 min	Vysoké (running replika)
Warm Standby (ASR)	15-60 min	5-15 min	Střední (replikace + low compute)
Cold Site	4-24 h	1-24 h	Nízké (jen storage)
Backup Only	24-72 h	24 h	Nejnižší (backup storage)

Typické parametry

99.8%

RTO achievement

S Azure Site Recovery

99.9%

Backup success

Rate úspěšných záloh

4x/rok

DR test cadence

Doporučená frekvence testů

<30 min

Recovery time

Typický failover s ASR

DR scénáře

Enterprise DR s ASR

Replikace 200+ VMs mezi Azure regiony. Automated recovery plans s sequencing, custom scripts a health checks.

Site RecoveryRecovery PlansPaired Regions

SQL Always On DR

SQL Server AG přes regiony pro zero-data-loss DR. Automatic failover group pro Azure SQL Database/MI.

Always On AGFailover GroupsGeo-Replication

Kubernetes DR

AKS backup s Velero, multi-region deployment s Azure Front Door, stateful workload replikace.

VeleroAKSAzure Front DoorGitOps

Ransomware recovery

Immutable backups, air-gapped vault, isolated recovery environment, rapid restore workflow.

Immutable VaultSoft DeleteRBACMFA

Čeho se vyvarovat

Netestovaný DR plán

DR plán, který nikdy nebyl testován, pravděpodobně nefunguje. Testujte pravidelně a dokumentujte výsledky.

Stejný region pro backup

Backup ve stejném regionu nechrání před region-wide outage. Používejte GRS nebo cross-region replikaci.

Ignorování application dependencies

Restore jednotlivých VMs bez respektování application dependencies vede k nekonzistentnímu stavu.

Manuální failover procesy

Manuální kroky prodlužují RTO a zavádějí human error. Automatizujte recovery plans v ASR.

Azure Backup & DR — klíčová témata

Azure Backup, ASR a Business Continuity v cloudu

Spolehlivá ochrana dat a aplikací — Recovery Services Vault, Site Recovery, immutable backupy a multi-region DR.

RTO a RPO definice

Recovery Time Objective (downtime tolerance) a Recovery Point Objective (data loss tolerance), Tier 0/1/2/3 mapping, SLA targets.

Recovery Services Vault

Centrální úložiště pro backupy VM, SQL, SAP HANA, file shares, Azure Files; geo-redundant (GRS), soft delete (14 dní), cross-region restore.

Azure Backup pro VMs

Application-consistent snapshots (VSS), incremental forever, retention policies (D/W/M/Y), instant restore tier (1–5 dní v snapshot cache).

Azure Backup pro SQL/SAP HANA

Workload-aware backup s log shipping (RPO 15 min), VDI/Backint integration, point-in-time restore, AlwaysOn AG support.

Immutable Vault a soft delete

Multi-User Authorization (MUA), Backup Vault Lock (compliance), 14denní soft delete, ochrana proti ransomware a insider threats.

Azure Site Recovery (ASR)

DR pro Azure VMs (cross-region), VMware/Hyper-V/physical → Azure, replication 5–30 sec RPO, app-consistent recovery points.

Recovery Plans a runbooks

Orchestrace multi-tier failover (web/app/DB), Azure Automation runbooks, manual actions, pre/post scripts, ordered boot.

Cross-region replication

Paired regions (Switzerland North/West), zone-redundant storage (ZRS), GZRS, RA-GRS pro read access secondary.

Geo-zone-redundant storage (GZRS)

Synchronní replikace do 3 AZ + asynchronní do paired region, 16 nines durability, RPO ~15 min, automatic failover.

Backup pro Microsoft 365

Třetí strany (Veeam, Commvault, Druva) pro Exchange/SharePoint/OneDrive/Teams, granular restore, long-term retention nad rámec native M365.

DR testing a validace

Test failover do isolated network (bez impactu na produkci), pravidelné cvičení (kvartálně), DR runbook validace, RTO/RPO measurement.

Compliance (ISO 22301, NIS2, DORA)

Business Continuity Management dle ISO 22301, NIS2 requirements pro essential services, DORA ICT continuity pro finanční sektor.

DR Implementation Process

Strukturovaný přístup k backup a DR na Azure

Fáze 1: Assessment

1-2 týdny

Business impact analysis
RTO/RPO requirements
Current state assessment
Workload classification
Gap analysis
DR strategy selection

Fáze 2: Design

1-2 týdny

DR architecture design
Backup policy design
Replication strategy
Network design
Security design
Runbook development

Fáze 3: Implementation

3-6 týdnů

Azure Backup configuration
Site Recovery setup
Replication enabling
Policy deployment
Testing a validation
Documentation

Fáze 4: Operations

Ongoing

Backup monitoring
DR drills
Recovery testing
Compliance reporting
Optimization
Capacity planning

Technology Stack

Azure backup a DR nástroje

Backup Services

Azure BackupRecovery Services VaultBackup CenterMARS AgentMABS

Disaster Recovery

Azure Site RecoveryRecovery PlansReplication PoliciesCapacity PlanningFailover Testing

Storage

LRS/GRS/ZRS/GZRSImmutable StorageSoft DeleteBlob VersioningArchive Tier

Monitoring

Backup ReportsAzure MonitorLog AnalyticsBackup AlertsBackup Explorer

Často kladené otázky o Backup & DR

Odpovědi na nejčastější dotazy o backup a disaster recovery na Azure

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