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.

Available now: E7

**Table 1** Large-memory ECS features
Series	Compute	Disk Type	Network
E7	vCPU to memory ratio: 1:20 Number of vCPUs: 48 to 96 3rd Generation Intel® Xeon® Scalable Processor Basic/Turbo frequency (vCPU to memory ratio: 1:20): 2.6 GHz/3.5 GHz	High I/O General Purpose SSD Ultra-high I/O Extreme SSD General Purpose SSD V2	Ultra-high packets per second (PPS) throughput An ECS with higher specifications has better network performance. Maximum PPS: 10,000,000 Maximum intranet bandwidth: 44 Gbit/s

Large-Memory E7

Overview

Large-memory E7 ECSs use 3rd generation Intel® Xeon® Scalable processors to provide powerful and stable computing performance. By using 25GE high-speed intelligent NICs, E7 ECSs offer ultra-high network bandwidth and 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)	Max. NIC Queues	Max. NICs	Max. Supplementary NICs	Virtualization
e7.12xlarge.20	48	960	30/20	550	16	8	1024	KVM
e7.24xlarge.20	96	1920	44/40	1000	32	8	2048	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 3.

**Table 3** 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 E7 ECS can have one system disk and 59 data disks.