Ultra-high I/O ECSs

Overview

Ultra-high I/O ECSs use high-performance local NVMe SSDs to provide high storage input/output operations per second (IOPS) and low read/write latency. You can create such ECSs on the management console.

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

Available now: D7i, Ir7, I7, aI7, I7n, Ir7n, Ir3, and I3

Ultra-high I/O D7i

Overview

D7i ECSs use the 3rd Generation Intel® Xeon® Scalable processor and large-capacity high-performance local NVMe SSDs to provide high storage IOPS and low read/write latency.

Notes

For details, see Notes.

Scenarios

• High-performance relational databases
• NoSQL databases (such as Cassandra and MongoDB)
• ElasticSearch

Specifications

Ultra-high I/O Ir7

Overview

Ir7 ECSs use the 3rd Generation Intel® Xeon® Scalable processor and two small-capacity high-performance local NVMe SSDs to provide high storage IOPS and low read/write latency.

Notes

Ir7 ECSs are only sold in Chinese mainland regions.

For details, see Notes.

Scenarios

• High-performance relational databases
• NoSQL databases (such as Cassandra and MongoDB)
• ElasticSearch

Specifications

Ultra-high I/O I7

Overview

I7 ECSs use the 3rd Generation Intel® Xeon® Scalable processor and large-capacity high-performance local NVMe SSDs to provide high storage IOPS and low read/write latency.

Notes

I7 ECSs are only sold in Chinese mainland regions.

For details, see Notes.

Scenarios

• High-performance relational databases
• NoSQL databases (such as Cassandra and MongoDB) and ElasticSearch

Specifications

Ultra-high I/O aI7

Overview

aI7 ECSs use the next-generation scalable processor and large-capacity high-performance local NVMe SSDs to provide high storage IOPS and low read/write latency.

Notes

For details, see Notes.

Scenarios

• High-performance relational databases
• NoSQL databases (such as Cassandra and MongoDB) and ElasticSearch

Specifications

Ultra-high I/O Ir7n

Overview

Ir7n ECSs use the 3rd Generation Intel® Xeon® Scalable processors to offer powerful and stable computing performance, 25GE high-speed intelligent NICs to support ultra-high network bandwidth and PPS, and high-performance local NVMe SSDs to provide high storage IOPS and low read/write latency.

Notes

For details, see Notes.

Scenarios

• High-performance relational databases
• NoSQL databases (such as Cassandra and MongoDB)
• ElasticSearch

Specifications

Ultra-high I/O I7n

Overview

I7n ECSs use the 3rd Generation Intel® Xeon® Scalable processors and high-performance local NVMe SSDs to provide high storage IOPS and low read/write latency.

Notes

For details, see Notes.

Scenarios

• High-performance relational databases
• NoSQL databases (such as Cassandra and MongoDB) and ElasticSearch

Specifications

Ultra-high I/O Ir3

Overview

Ir3 ECSs use the 2nd Generation Intel® Xeon® Scalable processors to offer powerful and stable computing performance, Huawei-proprietary 25GE high-speed intelligent NICs to support ultra-high network bandwidth and PPS, and high-performance local NVMe SSDs to provide high storage IOPS and low read/write latency.

Notes

For details, see Notes.

Scenarios

• High-performance relational databases
• NoSQL databases (such as Cassandra and MongoDB)
• ElasticSearch

Specifications

Ultra-high I/O I3

Overview

I3 ECSs use Intel® Xeon® Scalable processors and high-performance local NVMe SSDs to provide high storage IOPS and low read/write latency.

Notes

For details, see Notes.

Scenarios

• High-performance relational databases
• NoSQL databases (such as Cassandra and MongoDB) and ElasticSearch

Specifications

Scenarios

• High-performance relational databases
• NoSQL databases (such as Cassandra and MongoDB) and ElasticSearch

Local Disk Performance

Table 10 lists the local disk IOPS of D7i instance flavors. Table 11 lists the performance of a single local disk used by a D7i ECS.

Table 12 lists the local disk IOPS of Ir7 instance flavors.

Table 13 lists the local disk IOPS of I7 instance flavors. Table 14 lists the performance of a single local disk used by an I7 ECS.

Table 15 lists the local disk IOPS of aI7 instance flavors. Table 16 lists the performance of a single local disk used by an aI7 ECS.

Table 17 lists the local disk IOPS of Ir7n instance flavors.

Table 18 lists the local disk IOPS of I7n instance flavors. Table 19 lists the performance of a single local disk used by an I7n ECS.

Table 20 lists the local disk IOPS of Ir3 instance flavors.

Table 21 lists the local disk IOPS of I3 instance flavors. Table 22 lists the performance of a single local disk used by an I3 ECS.

Notes

• For details about the OSs supported by an ultra-high I/O ECS, see OSs Supported by Different Types of ECSs.
• If the host where an ultra-high I/O ECS is deployed is faulty, the ECS cannot be restored through live migration.
  • If the host is faulty or subhealthy, you need to stop the ECS for hardware repair.
  • In case of system maintenance or hardware faults, the ECS will be redeployed (to ensure HA) and cold migrated to another host. The local disk data of the ECS will not be retained.
• Ultra-high I/O ECSs do not support specifications change.
• Ultra-high I/O ECSs do not support local disk snapshots or backups.
• Ultra-high I/O ECSs can use local disks, and can also have EVS disks attached to provide a larger storage size. Note the following when using the two types of storage media:
  • Only an EVS disk, not a local disk, can be used as the system disk of an ultra-high I/O ECS.
  • Both EVS disks and local disks can be used as data disks of an ultra-high I/O ECS.
  • An ultra-high I/O ECS can have a maximum of 60 attached disks (including VBD, SCSI, and local disks).
• Modify the fstab file to set automatic disk mounting at ECS start. For details, see Initializing a Linux Data Disk (Less Than or Equal to 2 TiB).
• The local disk data of an ultra-high I/O ECS may be lost if an exception occurs, such as physical server breakdown or local disk damage. If your application did not use the data reliability architecture, it is a good practice to use EVS disks to build your ECS.
• When an ultra-high I/O ECS is deleted, the data on local NVMe SSDs will also be automatically deleted, which can take some time. As a result, an ultra-high I/O ECS takes a longer time than other ECSs to be deleted. Back up the data before deleting such an ECS.
• The data reliability of local disks depends on the reliability of physical servers and hard disks, which are SPOF-prone. It is a good practice to use data redundancy mechanisms at the application layer to ensure data availability. Use EVS disks to store service data that needs to be stored for a long time.
• The device name of a local disk attached to an ultra-high I/O ECS is /dev/nvme0n1 or /dev/nvme0n2.
• Local disks used by Ir3 ECSs can be split for multiple ECSs to use. If a local disk is damaged, the ECSs that use this disk will be affected.

  You are advised to add Ir3 ECSs to an ECS group during the creation process to prevent such failures. For details, see Managing ECS Groups.

• The basic resources, including vCPUs, memory, and image of an ultra-high I/O ECS will continue to be billed after the ECS is stopped. To stop the ECS from being billed, delete it and its associated resources.
• The %util parameter of a local disk indicates a percentage of CPU time during which I/O requests were issued to the device, so it is a perfect indication of how busy the local disk really is. For parallel disks such as NVMe SSD local disks, the %util parameter does not indicate how busy they really are.
• The logical volumes of Ir7, Ir7n, and Ir3 ECSs do not support using the blk flush command to flush cached data to the storage device.

Handling Damaged Local Disks Used by I-Series ECSs

If a local disk attached to an ECS is damaged, perform the following operations to handle this issue:

For a Linux ECS:

1. Detach the faulty local disk.
   1. Run the following command to query the mount point of the faulty disk:

      df –Th

      Figure 1 Querying the mount point
      
   2. Run the following command to detach the faulty local disk:

      umount Mount point

      In the example shown in Figure 1, the mount point of /dev/nvme0n1 is /mnt/nvme0. Run the following command:

      umount /mnt/nvme0

2. Check whether the mount point of the faulty disk is configured in /etc/fstab of the ECS. If yes, comment out the mount point to prevent the ECS from entering the maintenance mode upon ECS startup after the faulty disk is replaced.
   1. Run the following command to obtain the partition UUID:

      blkid Disk partition

      In this example, run the following command to obtain the UUID of the /dev/nvme0n1 partition:

      blkid /dev/nvme0n1

      Information similar to the following is displayed:

      /dev/nvme0n1: UUID="b9a07b7b-9322-4e05-ab9b-14b8050cd8cc" TYPE="ext4"

   2. Run the following command to check whether /etc/fstab contains the automatic mounting information about the disk partition:

      cat /etc/fstab

      Information similar to the following is displayed:

      UUID=b9a07b7b-9322-4e05-ab9b-14b8050cd8cc    /mnt   ext4    defaults        0 0

   3. If the mounting information exists, perform the following steps to delete it.
      1. Run the following command to edit /etc/fstab:

         vi /etc/fstab

         Use the UUID obtained in 2.a to check whether the mounting information of the local disk is contained in /etc/fstab. If yes, comment out the information. This prevents the ECS from entering the maintenance mode upon ECS startup after the local disk is replaced.

      2. Press i to enter editing mode.
      3. Delete or comment out the automatic mounting information of the disk partition.

         For example, add a pound sign (#) at the beginning of the following command line to comment out the automatic mounting information:

         # UUID=b9a07b7b-9322-4e05-ab9b-14b8050cd8cc    /mnt   ext4    defaults        0 0

      4. Press Esc to exit editing mode. Enter :wq and press Enter to save the settings and exit.
3. Run the following command to obtain the SN of the local disk:

   For example, if the nvme0n1 disk is faulty, obtain the serial number of the nvme0n1 disk.

   ll /dev/disk/by-id/

   Figure 2 Querying the serial number of the faulty local disk
   
4. Stop the ECS and provide the serial number of the faulty disk to technical support personnel to replace the local disk.

   After the local disk is replaced, restart the ECS to synchronize the new local disk information to the virtualization layer.

For a Windows ECS:

1. Open Computer Management, choose Computer Management (Local) > Storage > Disk Management, and view the disk ID, for example, Disk 1.
2. Open Windows PowerShell as an administrator and run the following command to query the disk on which the logical disk is created:

   Get-CimInstance -ClassName Win32_LogicalDiskToPartition |select Antecedent, Dependent | fl

   Figure 3 Querying the disk on which the logical disk is created
   
3. Run the following command to obtain the serial number of the faulty disk according to the mapping between the disk ID and serial number:

   Get-Disk | select Number, SerialNumber

   Figure 4 Querying the mapping between the disk ID and serial number
   
   

   If the serial number cannot be obtained by running the preceding command, see Using a Serial Number to Obtain the Disk Device Name (Windows).

4. Stop the ECS and provide the serial number of the faulty disk to technical support personnel to replace the local disk.

   After the local disk is replaced, restart the ECS to synchronize the new local disk information to the virtualization layer.