Exploring features and improvements of SAP HANA 2 Dynamic Tiering, and how to monitor HANA Dynamic Tiering with IT-Conductor. Blog: https://www.itconductor.com/blog/sap-hana-2-dynamic-tiering-overview-including-hana-monitoring

1. HANA2 Dynamic Tiering
This is a compilation of notes collected exploring and testing features of
Dynamic Tiering in HANA2
May 2017
This is a ‘continuation’ of the first blog, SAP HANA Dynamic Tiering Test-
drive, exploring the features of Dynamic Tiering before the HANA2
By OZSoft Consulting for ITConductor.com
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 1

2. References
HANA2 Dynamic Tiering Guides
• Dynamic_Tieiring_Option_Release_Notes
• Dynamic_Tieiring_Option_Master_Guide
• Dynamic_Tieiring_Option_Installation_Guide
• Dynamic_Tieiring_Option_Administration_Guide
HANA2 Administration Guide
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 2

3. Introduction (1)
The first blog SAP HANA Dynamic Tiering Test-drive covered
the following
• Overview of HANA’s multi-temperature data management (HOT, WARM, COLD)
• Installation of DT and adding host, data provisioning to a tenant DB and creating
extended storage (ES)
• WARM table
1. Create WARM table using ES
2. Copy data from HOT to WARM table, and deleting the data from WARM
3. Creating view ‘joining’ HOT and WARM table for transparent access
4. Using visualize plan showing access to HOT and WARM table
• Backup
• Monitoring/Reporting
• HANA Cockpit tiles on DT
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 3

4. Introduction (2)
This blog will focus on following
• Co-host deployment
• Multi-Store Table
oCreation
oAging and anti-aging
oVirtualize Plan
• Dynamic Tiering Tiles in the new HANA2 Cockpit
• New Backup feature/support in HANA2
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 4

5. Deployment
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 5
Pre-HANA2
(Production)
HANA2
(Production)
Host1
Role=Worker
Host..n
Role=Extend
ed Storage
Worker/Stan
dby
Cohost Deployment is not
recommended in production
HOST1
Host Role (Worker,
Extended Storage)
HOST2
Role (Worker, Extended
Storage Worker/Standby)
Host.n
Role=Worker
Host..n
Role=Extend
ed Storage
Worker/Stan
dby
Cohost deployment in production is
supported.
ES configuration parameters available to
avoid impact on performance

6. Dynamic Tiering Installation / Add Host role
• Using HANA Cockpit (Life Cycle Management)
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 6
Add role to
existing host
Installation

7. HANA2 Cockpit – Dynamic Tiering
When an ‘extended storage’ has been provisioned to a tenant
DB, the Dynamic Tiering options will appear in HANA2 Cockpit
for that tenantDB
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 7

8. Dynamic Tiering Tables
There are two types of tables in Dynamic Tiering option
1. Extended table - table specifically created with all data stored into the
extended storage (ES).
This was explored in the previous blog SAP HANA Dynamic Tiering
Test-drive
2. MultiStore table – partitioned table with some partitions stored in the
in-memory, and some partitions in the extended storage – new in
HANA2.
The following slides shows the differences on the table creation, moving
data into ES, making the access to the table transparent – regardless of
the location of the data.
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 8

9. Dynamic Tiering Tables
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 9
Extended Table
A table can only reside in
either in-memory (HOT) or
extended storage (WARM)
WORKER host
(In-Memory)
HOT Tables
(e.g.
TSP06_HOT)
Extended
Storage host
WARM Tables
(e.g.
TSP06_WARM)
MultiStore
Multistore table can have some
part(s) in in-memory, and some parts
in extended storage
HOST – roles (WORKER, ES Worker)
In-Memory
TSP06 table
Part1..
Part2..
Part3
Extended Storage
DBspace
TSP06 Table
Part4..
Part5..

10. Dynamic Tiering - Table creation
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 10
Extended Table
WORKER host
(In-Memory)
HOT Tables
(e.g.
TSP06_HOT)
Extended
Storage host
WARM Tables
(e.g.
TSP06_WARM)
MultiStore Table
Define multistore table as partitioned,
with some partitions in in-memory, while
other partitions using extended storage
HOST – roles (WORKER, ES Worker)
In-Memory
TSP06 table
Part1..
Part2..
Part3
Extended Storage
DBspace
TSP06 Table
Part4..
Part5..
• CREATE TABLE TSP06_HOT …
• CREATE TABLE TSO06_WARM USE
EXTENDED STORAGE
CREATE VIEW TSP06_ALL..
JOIN TSP06_HOT, TSP06_WARM
The view will make the change
transparent to existing access calls
CREATE TABLE … PARTITON BY RANGE..
USING DEFAULT STORAGE (Partition
definition)
USING EXTENDED STORAGE (Partition
definition)
(NO View needed)

11. Moving data (archiving/un-archiving)
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 11
Extended Table
WORKER host
HOT Tables
(e.g.
TSP06_HOT)
Extended
Storage host
WARM Tables
(e.g.
TSP06_WARM)
MultiStore Table
Aging – moving data from in-memory to ES
ALTER TABLE …
ALTER PARTITION..
USING EXTENDED STORAGE
(partition definition)
HOST – roles (WORKER, ES Worker)
In-Memory
TSP06 table
Part1..
Part2..
Part3
Extended Storage
DBspace
TSP06 Table
Part4..
Part5..
Step 1
INSERT INTO TSP06_WARM
SELECT * from TSP06_HOT
WHERE (criteria)
Step 2
DELETE FROM TSP06_HOT
WHERE (Criteria as per insert)
Moving data from In-Memory to ES
UN-Aging – moving data from ES to in-
memory
ALTER TABLE …
ALTER PARTITION..
USING DEFAULT STORAGE
(partition definition)

12. Multi-Store Table (1)
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 12
In-Memory
In-Memory
Extended Storage
Defining table with range
partitioning on column
PDPAPER – some partitions in
DEFAULT STORAGE (In-
Memory), some in Extended
Storage

13. Multi-Store Table (2)
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 13
Partition information/Table definition

14. Virtualize Plan (1)
Select * (all data, from in-memory and extended storage)
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 14

15. Virtualize Plan (2)
Select data from partition 1 and 2 (from In-Memory)
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 15
Only partition 1 and 2 accessed – extended storage
not involved

16. Virtualize Plan (3)
Select data from partition in the extended storage only
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 16

17. Other options (1)
A table can be moved to extended storage using HANA Studio
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 17
AFTER
CONVERSION
For a partitioned table where all partitions
were in DEFAULT storage, using this option will
result in losing the partitioning values – i.e. will
end up as extended storage table (not
partitioned). Use ALTER partition instead

18. Other Options (2)
A table using extended storage can be converted to use in-
memory, through HANA Studio
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 18
AFTER
CONVERSION

19. BACKUP (delta and incremental)
Delta (differential) and Incremental now supported for tenant
with extended storage
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 19

20. HANA2 Dynamic Tiering - Alert
Alert series 5nn are related to Dynamic Tiering
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 20

21. Additional notes (1)
• With HANA2, co-deployment is introduced in production,
with new esserver.ini parameters to put threshold on the
host so the extended storage activities does not impact the
production performance
• As per OSS note 2086829, Dynamic Tiering licensing is
‘based on compressed storage on disk’ – not on memory
• Delta store feature allows concurrent update on table in
extended storage
• Take note on sizing algorithm when allocating the DBSPACES
– refer to the DT Administration Guide ‘Dbspace Sizing’.
• 2394124 - SAP HANA 2.0 Dynamic Tiering - Additional
Information
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 21

22. Additional notes (2)
In MDC,
• The one-to-one relationship between tenant DB and
extended storage (and vice-versa) still exist
• There can only one extended storage in a host
• Currently only one esserver service per host
 i.e. Tenant1 with ES in node1, and Tenant2 with ES in node2
 This is still the case for HANA2 SPS01, i.e. if another tenant requires
extended storage, it has to be created into another node.
• More information related to SPS01 on OSS note 2422585.
• System Replication - (extract from Admin Guide)
• The operation mode logreplay_readaccess is not supported with
systems having Dynamic Tiering services.
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 22

23. Monitoring Dynamic Tiering with IT-Conductor
Author: Terry Kempis
Editor: Linh Nguyen
ITConductor.com 23
If the DT is on a separate
host, the DT host will
monitored similar to the
other hosts. In this
example, ozdtnode1 is
the extended_storage
host
If the dynamic tiering is
co-deployed, the service
‘esserver’ will appear on
that host’s services.

24. • Any Questions?
• Contact Info:
Linh Nguyen linh.nguyen@itconductor.com
Terry Kempis terry.kempis@itconductor.com
Let
itconductor.com
@itconductor