Overview

Disk-intensive DeHs are classified as d1 DeHs. d1 DeHs provide high-performance hardware and large-capacity hard disk drives (HDDs), so that ECSs created on such type of DeHs can efficiently and sequentially read and write ultra-large data sets stored on local storage.

Disk-intensive ECSs can be deployed on d1 DeHs.

If a DeH is faulty, the data stored in local disks cannot be completely restored. Therefore, do not store important data in local disks.

DeH Specifications

**Table 1** Specifications of d1 DeHs
Flavor Type	Number of Sockets	Number of Cores per Socket	Hardware Specifications	Number of vCPUs	Total Capacity of Local Disks
d1	2	12	CPU: Intel® Xeon® Processor E5-2690 v3 (30 MB Cache, 2.60 GHz) Memory: 328 GB (or 335,872 MB)	40	SAS disks: 24 x 1800 GB

Number of vCPUs = (Number of sockets x Number of cores x Number of single-core threads - CPU overheads) x CPU overcommitment ratio

d1 DeHs
vCPUs = (2 x 12 x 2 - 8) x 1 = 40

ECSs Allowed on d1 DeHs

**Table 2** ECS flavors allowed on d1 DeHs
ECS Flavor	vCPUs	Memory (RAM in GB)	Number of Local Disks
d1.xlarge	4	32	3
d1.2xlarge	8	64	6
d1.4xlarge	16	128	12
d1.8xlarge	36	256	24

Disk-Intensive DeHs

Overview

DeH Specifications

ECSs Allowed on d1 DeHs