Gab17 lyon SQL on Linux - David BARBARIN

1. Introducing SQL Server on Linux
David Barbarin

2. www.azug.fr
© 2017 AZUG FR. All Rights Reserved.
2
Meet the Team
Architecture, Performance and
high-availability
David Barbarin
Senior Consultant
@mikedavem
https://tinyurl.com/kx5a2yp

3. www.azug.fr
© 2017 AZUG FR. All Rights Reserved.
3
Agenda
• New architecture overview (SQL PAL)
• SQL Server installation
• SQL Server HA on Linux

4. www.azug.fr
© 2017 AZUG FR. All Rights Reserved.
4
New architecture overview (SQLPAL)
DBMS AS IS RS
SQL Platform Abstraction Layer
(PAL)
Windows
Host ext
Linux
Host ext
Windows Linux
SQL Platform Abstraction Layer
(PAL)
Win32-like APIs SQLOS API
SQLOS v2
Host ext.mapping to OS system calls (IO,
Memory, CPU scheduling)
Everything else
System resources
& latency
senstive code
paths
The setup

5. www.azug.fr
© 2017 AZUG FR. All Rights Reserved.
5
New architecture overview (SQLPAL)
Picoprocess based architecture

6. www.azug.fr
© 2017 AZUG FR. All Rights Reserved.
6
New architecture overview (SQLPAL)
The challenge

7. www.azug.fr
© 2017 AZUG FR. All Rights Reserved.
7
Agenda
• New architecture overview (SQL PAL)
• SQL Server installation
• SQL Server HA on Linux

8. www.azug.fr
© 2017 AZUG FR. All Rights Reserved.
8
SQL Server installation
> Diverse set environments
> Officially supported - REHL 7.2, Suse Enterprise v12 SP2, Ubuntu Server 16.(04/10) Docker engine 1.8+
> Others - CentOS 7.2, OpenSuse, Debian …
> File systems
> EXT4, XFS regarding the distribution
> Memory requirements
> 3.25 GB (CTP 2.0 has been tested up to 1 TB of memory at this time)
> Pricing and licensing
> Will be the same as on Windows

9. www.azug.fr
© 2017 AZUG FR. All Rights Reserved.
9
SQL Server installation
> Limitations
> Named instances / SQL Browser
> Replication
> Stretch DB
> DB Mirroring
> LogShipping
> Active Directory authentication / EKM / User-provided certificate SSL / TLS
> SQL Server agent limited to T-SQL subsystem
> AS / IS / SSRS / DQS / MDS / R / Stream Insight / Polybase …
> CLR.Net / CLR assemblies (EXTERNAL_ACCESS, UNSAFE)
> System extended procedures (xp_cmdshell etc..)
…
Containers
LogShipping
CLR strict security mode
CTP2.0

10. www.azug.fr
© 2017 AZUG FR. All Rights Reserved.
10
Agenda
• New architecture overview (SQL PAL)
• SQL Server installation
• SQL Server HA on Linux

11. www.azug.fr
© 2017 AZUG FR. All Rights Reserved.
11
SQL Server HA on Linux
> Backup and restore
> Same way than other platforms (SQL Server jobs, sqlcmd, Powershell, third party tools …)
> VDI backup supported (third-party tool vendors)
> VSS backups (SQL Writer) not supported -“quiesced” app based snapshots
> Backup TSQL commands – some refactoring necessary to fit with Linux environment

12. www.azug.fr
© 2017 AZUG FR. All Rights Reserved.
12
SQL Server HA on Linux
> SQL Server FCI
> HA add-on that built on the top of Pacemaker
> Shared storage (FC, ISCSI, NFS …)
> Limitations
> Domain vs local users in Linux - Identity cannot be shared across nodes
> SQL Server's integration with Pacemaker is not as coupled as with WSFC
> Managed as a single instance by Pacemaker
> No virtual network name concept in Pacemaker – managed by DNS entry
> No way to get the underlying cluster state from SQL Server

13. www.azug.fr
© 2017 AZUG FR. All Rights Reserved.
13
SQL Server HA on Linux

14. www.azug.fr
© 2017 AZUG FR. All Rights Reserved.
14
SQL Server HA on Linux
> SQL Server availability groups
> HA add-on that built on the top of Pacemaker
> HA or / and read-scale scenarios
> Mixing Windows and Linux operating systems is an option
> Limitations
> No way to get the underlying cluster state from SQL Server
> Listener not supported – no transparent redirection
> Manual failover cannot be managed from SQL Server
> sys.fn_hadr_backup_is_preferred_replica() cannot be used at this moment

15. www.azug.fr
© 2017 AZUG FR. All Rights Reserved.
15
SQL Server HA on Linux
Sequence number Sequence number Sequence number
Notify()
Notify()
REQUIRED_COPIES_TO_COMMIT

16. www.azug.fr
© 2017 AZUG FR. All Rights Reserved.
16
Merci à nos sponsors
PLATINUM
LOCAUX
PARTENAIRES MEDIA

17. www.azug.fr
© 2017 AZUG FR. All Rights Reserved.
17
Sponsors internationaux

18. www.azug.fr
© 2017 AZUG FR. All Rights Reserved.
18
Nous suivre
Facebook
facebook.com/groups/azugfr
Twitter
twitter.com/AZUGFR
Meetup
meetup.com/AZUG-FR/
Web
www.azug.fr
Twitter
twitter.com/MugLyon
Web
https://muglyon.github.io
Meetup
meetup.com/MugLyon

19. Merci
d’être venus
A bientôt !