Large-Memory ECSs

Overview

Large-memory ECSs provide an even larger amount of memory than memory-optimized ECSs. They are used for applications that require a large amount of memory, rapid data switching, low latency, and capability of processing large volumes of data. Large-memory ECSs provide large memory and high computing, storage, and network performance.

Hyper-threading is enabled for this type of ECSs by default. Each vCPU is a thread of a CPU core.

Available now: E7, E6, and E3

**Table 1** Large-memory ECS features
Series	Compute	Disk Type	Network
E7	vCPU to memory ratio: 1:20 or 1:21 Number of vCPUs: 48 to 384 Next-generation Intel® Xeon® Scalable Processor Basic/Turbo frequency (vCPU to memory ratio: 1:20): 2.6 GHz/3.5 GHz Basic/Turbo frequency (vCPU to memory ratio: 1:21): 2.1 GHz/3.8 GHz	High I/O General Purpose SSD Ultra-high I/O Extreme SSD General Purpose SSD V2	Support for IPv6 Ultra-high packets per second (PPS) throughput An ECS with higher specifications has better network performance. Maximum PPS: 30 million PPS Maximum intranet bandwidth: 100 Gbit/s Maximum number of network connections: 10 million
E6	vCPU to memory ratio: 1:28 Number of vCPUs: 104 to 208 2nd Generation Intel® Xeon® Scalable Processor Basic/Turbo frequency: 2.7 GHz/4.0 GHz	High I/O General Purpose SSD Ultra-high I/O Extreme SSD	Ultra-high PPS throughput An ECS with higher specifications has better network performance. Maximum PPS: 10,000,000 Maximum intranet bandwidth: 40 Gbit/s
E3	vCPU to memory ratio: 1:12, 1:14, or 1:20 Number of vCPUs: 28 to 208 Intel® Xeon® Scalable Processor Basic/Turbo frequency (vCPU to memory ratio: 1:12): 3.0 GHz/3.4 GHz Basic/Turbo frequency (vCPU to memory ratio: 1:14 or 1:20): 2.1 GHz/3.8 GHz	High I/O General Purpose SSD Ultra-high I/O Extreme SSD General Purpose SSD V2	Ultra-high PPS throughput An ECS with higher specifications has better network performance. Maximum PPS: 10,000,000 Maximum intranet bandwidth: 40 Gbit/s

Large-Memory E7

Overview

Large-memory E7 ECSs use next-generation Intel® Xeon® Scalable processors to provide powerful and stable compute. By using high-speed intelligent NICs, E7 ECSs offer ultra-high network bandwidth and packets per second (PPS).

Notes

For notes about using E7 ECSs, see Notes.

Scenarios

Online transaction processing (OLTP) and online analytical processing (OLAP) scenarios
SAP HANA in-memory databases, such as SAP Business Suite on HANA (SoH), SAP S/4HANA (S4H), SAP Business Warehouse on HANA (BWoH), and SAP BW/4HANA (B4H)
High-performance databases
Distributed cache
Big data processing engines and data mining applications

Specifications

**Table 2** E7 ECS specifications
Flavor	vCPUs	Memory (GiB)	Max./Assured Bandwidth (Gbit/s)	Max. PPS (10,000)	Network Connections (10,000)	Max. NIC Queues	Max. NICs	Max. Supplementary NICs	Virtualization
e7.12xlarge.20	48	960	30/20	550	500	16	8	1024	KVM
e7.24xlarge.20	96	1920	44/40	1000	1000	32	8	2048	KVM
e7.48xlarge.21	192	4032	50/40	1500	500	16	8	1024	KVM
e7.96xlarge.21	384	8064	100/90	3000	1000	32	8	2048	KVM

For flavors with more than 255 vCPUs, if a Linux image is selected, the OS kernel version must be later than 5.10-rc1 or have the patch installed, for example, SUSE 15 SP3, SP4, or later.

Large-Memory E6

Overview

E6 ECSs use second-generation Intel® Xeon® Scalable processors to provide powerful and stable computing performance. By using 25GE high-speed intelligent NICs, E6 ECSs offer ultra-high network bandwidth and PPS. They also provide up to 5,896 GiB of memory size for large memory intensive applications.

Notes

For notes about using E6 ECSs, see Notes.

Application Scenarios

OLTP and OLAP scenarios
SAP HANA in-memory databases, such as SAP Business Suite on HANA (SoH), SAP S/4HANA (S4H), SAP Business Warehouse on HANA (BWoH), and SAP BW/4HANA (B4H)
High-performance databases
Distributed cache
Big data processing engines and data mining applications

Specifications

**Table 3** E6 ECS specifications
Flavor	vCPUs	Memory (GiB)	Max./Assured Bandwidth (Gbit/s)	Max. PPS (10,000)	Max. NIC Queues	Max. NICs	Virtualization
e6.26xlarge.28	104	2948	30/20	550	16	8	KVM
e6.52xlarge.28	208	5896	40/40	1,000	32	8	KVM

Large-Memory E3

Overview

Large-memory E3 ECSs use Intel® Xeon® Scalable processors to provide powerful and stable computing performance. By using 25GE high-speed intelligent NICs, E3 ECSs offer ultra-high network bandwidth and PPS.

Notes

For notes about using E3 ECSs, see Notes.

Scenarios

OLTP and OLAP scenarios
SAP HANA in-memory databases, such as SAP Business Suite on HANA (SoH), SAP S/4HANA (S4H), SAP Business Warehouse on HANA (BWoH), and SAP BW/4HANA (B4H)
High-performance databases
Distributed cache
Big data processing engines and data mining applications

Specifications

**Table 4** E3 ECS specifications
Flavor	vCPUs	Memory (GiB)	Max./Assured Bandwidth (Gbit/s)	Max. PPS (10,000)	Max. NIC Queues	Max. NICs	Virtualization
e3.7xlarge.12	28	348	25/12	280	8	8	KVM
e3.14xlarge.12	56	696	25/25	550	16	8	KVM
e3.26xlarge.14	104	1466	30/20	550	16	8	KVM
e3.52xlarge.14	208	2932	40/40	1,000	32	8	KVM
e3.52xlarge.20	208	4096	40/40	1,000	32	8	KVM

Notes

Large-memory ECSs do not support NIC hot swapping.
Affected by the memory loading speed, large-memory ECSs may take longer to start.

The primary and extension NICs of a large-memory ECS can only be used in the scenarios listed in Table 5.

**Table 5** Application scenarios of the NICs of a large-memory ECS
NIC Type	Application Scenario	Remarks
Primary NIC	Vertical layer 3 communication	N/A
Extension NIC	Horizontal layer 2 communication	To improve network performance, you can set the MTU of an extension NIC to 8888.

An ECS can have a maximum of 60 attached disks, including the system disk. For details about constraints, see Can I Attach Multiple Disks to an ECS?
For example, an E3 ECS can have one system disk and 59 data disks.

An existing large-memory ECS can have a maximum of 40 attached disks (including the system disk). To attach 60 disks, enable advanced disk. For details, see Enabling Advanced Disk.