Single-Node Deployment Where HA Is Not Required

Updated on 2022-03-04 GMT+08:00

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Single-node deployment is usually applied in OLTP scenarios. You can choose the HA configuration as required.

System Architecture

Figure 1 shows the system architecture in single-node scenario where HA is not required.

Figure 1 Single-node scenario where HA is not required
Click to enlarge

The concepts involved in the preceding figure are as follows:

VPC network: All SAP HANA nodes are deployed within a VPC network, and all nodes in the HANA system belong to the same AZ to ensure network security.
Public subnet:
- Network Address Translation (NAT) instance ECS: allows you to access SAP HANA nodes using SSH.
- SAP HANA Studio ECS: runs the SAP HANA Studio software. You can use RDP or SSH to access the SAP HANA Studio ECS and manage the SAP HANA system.
Private subnet:
SAP HANA node: used for deploying the SAP HANA software. An SAP HANA server has the following disks attached:
- OS disk: provides the directory for installing the OS.
- Data volume: periodically stores the data transmitted from the SAP HANA IMDB (a database running in high-performance memory). The period is 5 minutes by default.
- Log volume: stores the data triggered by an event. When an event, for example, a record or a batch of records are updated, is triggered for the server IMDB, the system will write the latest IMDB data into the log volume.
- Shared volume: stores the SAP HANA installation software and SAP HANA database log files.
- Backup volume: stores SAP HANA database backup files.
- Usr/sap: used to mount to the /usr/sap directory.
- Swap volume: Linux swap space.

Requirements on SAP HANA Nodes

**Table 1** Memory-optimized M6 ECS specifications
ECS Type	vCPUs	Memory (GB)	Flavor
Memory-optimized	32	256	m6.8xlarge.8
Memory-optimized	64	512	m6.16xlarge.8

SAP HANA node specifications used in the SoH or BWoH scenario must meet the following requirements:

Table 2 lists the specifications of HANA ECSs certified by SAP on HUAWEI CLOUD.

**Table 2** Large-memory E3 ECS specifications
ECS Type	vCPUs	Memory (GB)	Flavor
Large-memory	28	348	e3.7xlarge.12
Large-memory	56	696	e3.14xlarge.12

**Table 3** Memory-optimized M6 ECS specifications
ECS Type	vCPUs	Memory (GB)	Flavor
Memory-optimized	32	256	m6.8xlarge.8
Memory-optimized	64	512	m6.16xlarge.8

SAP HANA OSs and disks must meet the following requirements:

NOTE:

SAP HANA ECS volumes include log volumes, data volumes, shared volumes, backup volumes, and /usr/sap volumes.
A shared disk can be attached to multiple ECSs, while a non-shared disk can only be attached to one ECS.

**Table 4** Requirements on HANA ECS OS in single-node deployment mode
Item	Specifications
OS	SUSE Linux Enterprise Server for SAP Applications 12 SP3 SUSE Linux Enterprise Server for SAP Applications 12 SP4 SUSE Linux Enterprise Server for SAP Applications 12 SP5 SUSE Linux Enterprise Server for SAP Applications 15 SUSE Linux Enterprise Server for SAP Applications 15 SP1

**Table 5** Requirements on E3 ECS disks in single-node deployment scenarios
Disk	Type	Sharing Mode	Size
OS volume	High I/O	Non-shared disk	-
Log volume	Ultra-high I/O	Non-shared disk	For details, see Table 6.
Data volume	Ultra-high I/O	Non-shared disk	Create an EVS disk. Use LVM to create soft partitions and logically divide the disk into data volumes. For details, see Table 6.
Shared volume	High I/O	Non-shared disk	The recommended size is at least 1.2 times that of the memory size.
Backup volume	SFS	N/A	The recommended size is at least three times that of the memory size.
SBD volume	High I/O	Shared disk (SCSI)	10 GB
/usr/sap volume	High I/O	Non-shared disk	100 GB
Swap volume	High I/O	Non-shared disk	10 GB

**Table 6** Recommended log and data volume specifications for E3 ECSs
Flavor	Log Volume Size (GB)	Data Volume Size
e3.7xlarge.12	200	2 x 250 GB EVS disks
e3.14xlarge.12	512	2 x 450 GB EVS disks

Requirements on Other Nodes

Other nodes include the NAT server and SAP HANA Studio nodes. Table 7 lists the requirements on these nodes.

**Table 7** Data planning for other nodes
Node	Specifications
SAP HANA Studio	OS: NOTE: Based on service requirements, use a Windows or Linux ECS to deploy SAP HANA Studio. Windows: Windows Server 2012 R2 or Windows Server 2008 R2 Linux: SUSE Linux Enterprise Server (SLES) 12 SP2 or later Flavor: s1.xlarge (4 vCPUs and 16 GB memory capacity) System disk: High I/O and 80 GB
NAT server	OS: SUSE Linux Enterprise Server (SLES) 12 SP2 or later Flavor: s1.medium (1 vCPU and 4 GB memory capacity) or higher System disk: High I/O and 40 GB

Deployment

For instructions about how to create ECSs or HANA ECSs on the management console and install the SAP HANA software on the ECS or HANA ECS, see the SAP HANA User Guide (Single-Node Deployment).

Parent topic: Application Scenarios

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