Slides presented at SQL Saturday 921, about how to implement a SQL Server disaster recovery solution using Azure as a secondary data center

1. Disaster recovery per tutti!
SQL Server ed Azure
Marco Obinu

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8. Marco Obinu
Advisory Engineer
SoftJam S.p.A.
@OmegaMadLab
marco.obinu@omegamadlab.com
http://www.omegamadlab.com
https://github.com/OmegaMadLab
https://www.linkedin.com/in/marco-obinu-omegamadlab/
https://www.youtube.com/channel/UCpkBeQSscC1iBvpNP4VNTKQ
• Geek to the bone 
• Azure Solution Architect Expert
Who am I?

9. Concetti di base

10. Un po’ di terminologia…
Dati persi Tempo di ripristino
Interruzione di
servizio
RPO RTO
RTO - RPO
COSTI - COMPLESSITÀ

11. Perché utilizzare Azure come sito di DR?

12. Costi Benefici
Microsoft Azure
Nuove
tecnologie
Microsoft
Azure
Perché utilizzare Azure come sito di DR?

13. Ma quanto ci costa a livello di licenze?
SQL 2017 (SA)
SQL 2019 (SA)

14. Infrastructure-as-a-Service model
MANAGEDBYVENDOR
MANAGEDBYVENDOR
MANAGEDBY
VENDOR
APPLICATION
HYPERVISOR
OS
RUNTIME
DATA
STORAGE
NETWORK
TRADITIONAL IT
APPLICATION
HYPERVISOR
OS
RUNTIME
DATA
STORAGE
NETWORK
IaaS
YOUMANAGE
SERVERS SERVERS
APPLICATION
HYPERVISOR
OS
RUNTIME
DATA
STORAGE
NETWORK
PaaS
YOUMANAGE
SERVERS
APPLICATION
HYPERVISOR
OS
RUNTIME
DATA
STORAGE
NETWORK
SaaS
SERVERS
YOUMANAGE
SQL Server
on IaaS VM

15. Principali tecnologie native per il DR di SQL

16. Backup su storage account
On-prem datacenter
Supported Version/Edition
Recovery Model
Complexity
RTO
RPO
Data access on DR site

17. Log shipping
On-prem datacenter
Supported Version/Edition
Recovery Model
Complexity
RTO
RPO
Data access on DR site

18. Mirroring
On-prem datacenter
Supported Version/Edition
Recovery Model
Complexity
RTO
RPO
Data access on DR site

19. On-prem datacenter
Always On Availability Group
Supported Version/Edition
Recovery Model
Complexity
RTO
RPO
Data access on DR site

20. Anatomia di Always On AG
network subnet
AG Listener
VNN IP
On-prem network
VNN IP

21. Cluster quorum
Vote = 1
Node 1
Cluster UP
Vote = 1
Node 2
Cluster UP
Vote = 1
Node 3
Cluster UP
Vote = 1
Node 1
Cluster DOWN

22. Azure networkOn-prem network
Anatomia di Always On AG
VNN IP2IP1
AG Listener
VNN IP2IP1

23. Azure networking for clusters
Cluster Node
IP
Cluster IP
resource
IP
Cluster Node
IP
Cluster IP
resource
IP
On-premises Azure

24. Azure networking for clusters
Cluster Node
IP
Cluster IP
resource
IP
Cluster Node
IP
Cluster IP
resource
IP
On-premises Azure
Azure Load
Balancer

25. Azure vnet
Always On AG – come funziona il failover?
On-prem network
Users Reports
Read-onlyRead-only

26. Always On Distributed AG (SQL2016+)
Azure vnetOn-prem network
WSFC1 WSFC2
Distributed Availability Group
VNN IP VNN IP
AG Listener
VNN IP
AG Listener
VNN IP

27. • SQL Server 2016 Standard o
successivo
• Un singolo database per
gruppo
• Una sola replica non
accessibile
• Replica sincrona o asincrona
• Complesso da implementare
se si hanno più DB
Always On BAG
Azure vnetOn-prem network
AG Listener
VNN IP2IP1
VNN IP2IP1

28. • SQL Server 2016 Standard o
successivo
• Un singolo database per
gruppo
• Una sola replica non
accessibile
• Replica sincrona o asincrona
• Complesso da implementare
se si hanno più DB
Always On BAG
Azure vnetOn-prem network
AG Listener
VNN IP2IP1
VNN IP2IP1
AG Listener 2
VNN 2 IP4IP3

29. Interazione con Failover Cluster Instance
network subnet
Azure subnetOn-prem network
VNN IP2IP1
AG Listener
VNN IP2IP1

30. Azure Site Recovery

31. • Azure Site Recovery orchestra la
protezione dei nostri workload
• In caso di failover mette in atto il
recovery plan definito e testato in
precedenza
• Può governare un sistema di DR SQL
• Può gestire la replica diretta di una
sistema SQL
Azure Site Recovery

32. Materiale utile
Demo FCI + BAG con SQL Standard Edition
https://github.com/OmegaMadLab/FCI_and_AG
https://youtu.be/s8TmM-0E9sQ
Documentazione ufficiale
https://docs.microsoft.com/en-us/azure/virtual-machines/windows/sql/virtual-machines-windows-sql-high-availability-dr
SQL backup to Azure Blob Storage cheat sheet:
https://techcommunity.microsoft.com/t5/DataCAT/SQL-Server-Backup-to-URL-a-cheat-sheet/ba-p/346358
Documentazione FCI + AG:
https://docs.microsoft.com/it-it/sql/database-engine/availability-groups/windows/failover-clustering-and-always-on-
availability-groups-sql-server?view=sql-server-2017
DBATools
https://dbatools.io
SQL Saturday 895 – SQL Server e PowerShell: from Zero to Hero
https://youtu.be/yR3TfZfzHss
SQL Server 2019 licensing sheet
https://download.microsoft.com/download/6/6/0/66078040-86d8-4f6e-b0c5-
e9919bbcb537/SQL%20Server%202019%20Licensing%20guide.pdf

33. Thank you
Ricordatevi di
compilare il feedback
form 
https://speakerscore.
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#SqlSat921