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.
Applications
Large-memory ECSs are suitable for applications that require a large amount of memory, rapid data switching, and low latency, and process large volumes of data.
Application scenarios
OLTP and OLAP scenarios
Specifications¶
Flavor | vCPUs | Memory (GiB) | Max./Assured Bandwidth (Gbit/s) | Max. PPS (10,000) | Max. NIC Queues | Max. NICs | Virtualization | Hardware |
---|---|---|---|---|---|---|---|---|
e6.26xlarge.28 | 104 | 2948 | 30/20 | 550 | 16 | 8 | KVM | CPU: Intel® Xeon® Skylake 8280 |
e6.52xlarge.28 | 208 | 5896 | 40/40 | 1,000 | 32 | 8 | KVM |
Flavor | vCPUs | Memory (GiB) | Max./Assured Bandwidth (Gbit/s) | Max. PPS (10,000) | Max. NIC Queues | Max. NICs | Virtualization | Hardware |
---|---|---|---|---|---|---|---|---|
e3.7xlarge.12 | 28 | 348 | 25/12 | 280 | 8 | 8 | KVM | CPU: Intel® Xeon® Skylake 6151 |
e3.14xlarge.12 | 56 | 696 | 25/25 | 500 | 16 | 8 | KVM | |
e3.26xlarge.14 | 104 | 1466 | 30/20 | 550 | 16 | 8 | KVM | CPU: Intel® Xeon® Skylake 8176 |
e3.52xlarge.14 | 208 | 2932 | 40/40 | 1,000 | 32 | 8 | KVM |
Notes¶
Large-memory ECSs do not support NIC hot swapping.
Specifications of large-memory ECSs can be modified only within the same flavor family.
Affected by the memory loading speed, large-memory ECSs may take longer to start.
Table 3 lists the OSs supported by large-memory ECSs.
¶ OS
Version
CentOS
CentOS 7.9 64bit
CentOS 7.7 64bit
EulerOS
EulerOS 2.5 64bit
Fedora
Fedora 35 64bit
Fedora 34 64bit
Fedora 33 64bit
OpenSUSE
OpenSUSE 15.3 64bit
Oracle Linux
Oracle Linux Server release 8.4 64bit
Oracle Linux Server release 7.6 64bit
Red Hat
Red Hat Enterprise Linux 7.9 64bit
SUSE
Novell SUSE Linux Enterprise Server 15 SP3 64bit
Novell SUSE Linux Enterprise Server 15 SP2 64bit
Novell SUSE Linux Enterprise Server 15 SP1 64bit
Novell SUSE Linux Enterprise Server 15 64bit
Novell SUSE Linux Enterprise Server 12 SP5 64bit
Novell SUSE Linux Enterprise Server 12 SP4 64bit
Novell SUSE Linux Enterprise Server 12 SP3 64bit
Ubuntu
Ubuntu 20.04 server 64bit
Ubuntu 18.04 server 64bit
Windows
Windows Server 2019 Standard 64bit
Windows Server 2016 Standard 64bit
Windows Server 2012 R2 Standard 64bit
Large-memory ECSs can use ultra-high I/O EVS disks as the system disk and data disks.
The primary and extension NICs of a large-memory ECS can only be used in the scenarios listed in Table 4.
¶ 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.