Recommended ECS Planning

This section describes the planning of SAP NetWeaver ECSs and NAT server (SAP GUI).

The flavors are only for reference. The ECS specifications are recommended examples. Choose one based on the SAP Sizing results.

**Table 1** Specifications of ECSs for SAP NetWeaver
Type	Flavor	vCPUs	Memory (GB)
High-Performance computing H1 ECS	h1.xlarge.4	4	16
	h1.2xlarge.4	8	32
	h1.4xlarge.4	16	64
	h1.8xlarge.4	32	128
Memory-optimized M3 ECS	m3.large.8	2	16
	m3.xlarge.8	4	32
	m3.2xlarge.8	8	64
	m3.3xlarge.8	12	96
	m3.4xlarge.8	16	128
	m3.6xlarge.8	24	192
	m3.8xlarge.8	32	256
General Computing-plus ECS	c6.large.4	2	8
	c6.xlarge.4	4	16
	c6.2xlarge.4	8	32
	c6.3xlarge.4	12	48
	c6.4xlarge.4	16	64
	c6.6xlarge.4	24	96
	c6.8xlarge.4	32	128
Memory-optimized M6 ECS	m6.large.8	2	16
	m6.xlarge.8	4	32
	m6.2xlarge.8	8	64
	m6.3xlarge.8	12	96
	m6.4xlarge.8	16	128
	m6.6xlarge.8	24	192
	m6.8xlarge.8	32	256
	m6.16xlarge.8	64	512

Plan the data for each ECS by referring to Table 2. For details about the hardware configuration, see section SAP NetWeaver ECS Hardware Evaluation (SAP Sizing).

**Table 2** Recommended ECS planning
Node	Specifications
SAP NetWeaver ECS planning in the standard deployment mode	Recommended configurations: OS: SUSE Linux Enterprise Server 12 SP1 for SAP or later Flavor: h1.2xlarge.4 (8 vCPUs and 32 GB memory) Disk: System disk: ultra-high I/O, 100 GB Data disk: ultra-high I/O, 200 GB
SAP NetWeaver ECS planning in the distributed deployment mode	Recommended configurations: OS: SUSE Linux Enterprise Server 12 SP1 for SAP or later Flavor: h1.2xlarge.4 (8 vCPUs and 32 GB memory) System disk: ultra-high I/O, 100 GB
SAP NetWeaver ECS planning in the distributed HA deployment mode	Recommended configurations: OS: SUSE Linux Enterprise Server 12 SP1 for SAP or later Flavor: h1.2xlarge.4 (8 vCPUs and 32 GB memory) Disk: System disk: ultra-high I/O, 100 GB Data disk (created on the active ASCS node): ultra-high I/O, SCSI, and three shared disks with a total of 170 GB memory. After a data disk is created, bind it to the standby ASCS node. Only create a system disk for the standby ASCS node. NOTE: In the cross-AZ HA scenario, you do not need to create the data disk. EVS disks cannot be shared across AZs. For details about how to create and configure a shared disk in a cross-AZ HA scenario, see Configuring iSCSI (Cross-AZ HA Deployment).
NAT Server	OS: SUSE Linux Enterprise Server 12 SP1 or later Flavor: s1.medium (1 vCPU and 4 GB memory) or higher System disk: high I/O, 40 GB

Table 3 and Table 4 list the file system planning in the distributed HA deployment mode.

**Table 3** Planning of the shared disk file system
Partition	Capacity (GB)	Mounting Directory	Description
sda	10	N/A	Used as the SBD disk.
sdb	80	/usr/sap/<SID>/ASCS<##>	Partition of the active ASCS node, which is used to install the ASCS instance.
sdc	80	/usr/sap/<SID>/ERS<##>	Partition of the standby ASCS node, which is used to install the ERS instance.

In the cross-AZ HA scenario, three ECSs are required and Internet Small Computer System Interface (iSCSI) is used to create a shared disk for Split Brain Detection (SBD). For details, see Configuring iSCSI (Cross-AZ HA Deployment). The disks used to install the ASCS instance and the ERS instance are provided by the SFS Turbo file system. Table 5 describes the planning of the SFS Turbo file system in the cross-AZ HA scenario.

**Table 4** Planning of the SFS Turbo file system
Name	Total Capacity (GB)	Mounting Directory	Description
sapmnt	100	/sapmnt	Shared to all nodes in the SAP NetWeaver system
usrsapsys	10	/usr/sap/<SID>/SYS	Shared to all nodes in the SAP NetWeaver system
sapmedia	100	/sapcd	Shared to all nodes in the SAP NetWeaver system

**Table 5** Planning of the SFS Turbo file system in the cross-AZ HA scenario.
Name	Total Capacity (GB)	Mounting Directory	Description
sapmnt	100	/sapmnt	Shared to all nodes in the SAP NetWeaver system
usrsapsys	10	/usr/sap/<SID>/SYS	Shared to all nodes in the SAP NetWeaver system
sapmedia	100	/sapcd	Shared to all nodes in the SAP NetWeaver system
ASCS	80	/usr/sap/<SID>/ASCS<##>	Shared to the active ASCS node, which is used to install the ASCS instance.
ERS	80GB	/usr/sap/<SID>/ERS<##>	Shared to the standby ASCS node, which is used to install the ERS instance.