Nuevos funcionalidades de SQL server 2014 y existentes que fueron mejorados

1. Data and SQL Server 2014
Kenneth Ureña
http://www.sqlcr.com
@sqlcr
/SpanishPASSVC

2. Agenda
 The journey of a transaction
 The Concurrency Issue - Hekaton
 Column Index Stored
 More New features

3. THE JOURNEY OF A TRANSACTION

4. Actual vacio
Virtual
Log
File
Truncated
- Sequential Access
- Just 1 file Active
- Recommended
Raid 1 ó 1 + 0
- Commit, backup log
trigger I/O
- Random Access
- Multiple datafiles Active
- Recommended Raid 1/1+0
5+0 / 5
- Checkpoint, backup, load /
unload Cache
Full Empty Full Empty
Empty Full Empty Full

5.  Based on Dr. David Dewitt Key
note
 PASS Summit 2013 Charlotte
THE CONCURRENCY ISSUE

6. Serialized Scenario
T1 : A = A + 100 T2 : A = A + 500
T1 : Read A (0)
T1 Update A (100)
T2 Read A (100) T2 Update A (600)
A = 600

7. Non-Serialized Scenario
T1 : A = A + 100 T2 : A = A + 500
T1 : Read A (0)
T1 Update A (100)
T2 Read A (0)
T2 Update A (500)
A = 500

8. Isolation Levels
Reference
http://technet.microsoft.com/en-us/library/ms189122(v=sql.105).aspx
Isolation level
Dirty
read
Nonrepeatable
read
Phanto
m
Read
uncommitted
Yes Yes Yes
Read
committed
No Yes Yes
Repeatable
read
No No Yes
Snapshot No No No
Serializable No No No

9. In-Memory Demo
• Database Creation
• Native Stored Procedures
• Mixed Stored Procedures
• Isolation Levels

10. COLUMN INDEX STORE

11. Data access patterns
 Seek
 Scan
 Bookmark Lookup

12. Column Index
Image from
http://magenic.com/

13. Column Index Store Demo
• Database Creation
• Queries comparison
• New Features for column store

14. MORE NEW FEATURES

15. Resource Governor Improvements
 Before 2014
 Governor CPU per pool
 Governor Memory per pool
 After 2014
 Governor IOPS

16. Delayed durability
 Return the control to the application before
recording the data in the log area.

17. Buffer Pool Extension
 It is like having an additional page file in
windows but for SQL Server extending the
buffer pool.
alter server configuration
set buffer pool extension on
(filename =
'C:SQLServerDatabases2014BPCACHEBufferPoolExtension.bpe‘
, size = 20 GB);

18. AlwaysOn Enhancements
 Maximum number of secondary replicas has
been expanded from four to eight.
 Readable secondary replicas are now also
available for read workloads, even when the
primary replica is unavailable
 New Add Azure Replica Wizard, which helps
you create asynchronous secondary replicas
in Windows Azure

19. Q&A
Thank you
Kenneth Ureña
http://www.sqlcr.com
@sqlcr
/SpanishPASSVC