Operation Guide

Create a host and enable Data Ark

Enable Data Ark

You can enable Data Ark when creating a host.

Notes on Using Data Ark

After creating the host, Data Ark needs about 10 minutes to initialize.

Manage Data Ark

Data Ark Entry

After creating a host and enabling Data Ark, select the host in the host resource list, click “Enter Ark” in the Disk & Recovery Tab, to enter Data Ark Backup Management.

Data Ark Backup Management

After entering Data Ark Backup Management, you can view the related information of the system disc backup chain and data disc backup chain as shown below.

Data Ark Backup Method

Automatic Backup

The system disk and data disk have three backup forms, which are:

12-hour-second-level backup: The latest data within 12 hours can be restored to any data status in any second through Data Ark;
Backup at whole hours within 24 hours: Data between 12 hours and 24 hours can be restored to hourly data at whole hours;
Back up at zero o’clock within 3 days: Data from 24 hours to 3 days can be recovered at a daily level at zero o’clock every day.

Note: The data of the automatic backup cannot be deleted.

Second-Level Backup

(1) View 12-hour second-level backup

You can view the related information of the 12-hour second-level backup in Backup Management.

(2) Restore 12-hour second-level backup

Click “Restore” in Data Ark to select the time point within 12 hours to restore the system disk or data disk.

Note: Please shut down the host before recovery.

Whole Hour Backup and Zero Hour Backup

(1) View 24-hour whole hour backup and 3-day zero hour backup

You can view the related information of the 24-hour whole hour backup and the zero hour backup within 3 days in Backup Management.

(2) Restore 24-hour whole hour backup and 3-day zero hour backup

Click “Restoration” in Backup Management to select the whole hour in 24 hours or zero o’clock within 3 days to restore the system disk or data disk.

Note: Please shut down the host before recovery.

Manual Backup

Create Manual Backup

You can also choose to manually create a backup, select “Create Backup” in Backup Management.

When manually creating a backup, the time point is the time point of your current operation, you can choose to back up the system disk, data disk or both, and you can customize the backup name and backup description.

Restore Manual Backup

You can click “Restore” in Backup Management to enter Backup Recovery.

After entering the backup recovery page, click “Select Backup”, you can select the manual backup you created, select completion, you can perform the recovery operation.

Upgrade Configuration

After selecting a single cloud host in the host management list, you can choose to upgrade the configuration button in the right side detail panel

In the pop-up window, select the configuration to be modified. Note that upgrading the configuration requires shutting down the cloud host. If the current cloud host is on, you need to tick the checkbox indicated by the arrow in the figure below to confirm, otherwise the “OK” button will not be available.

After the upgrade is completed, the machine is in the shutdown state, you need to manually click the “Start” button to start.

Note that if the data disk has been upgraded, after the upgrade, you need to log in to the cloud host to perform disk expansion operations :

Linux operating system

For hosts with data disk expansion (applicable to hosts with Data Ark enabled)

Example:

10:00, your host (Data Ark enabled) current data disk capacity is 20G ;

11:00, you perform an upgrade operation on the host, and expand the data disk to 100G ;

13:00, you need to restore the data disk to 10:00.

At this point, you need to take the following steps:

Check the file system type of the data disk (the upgrade operation needs to take different operations for ext4 and xfs two file systems)

df -ihT

Operations for ext4 file format operating system (such as CentOS6) :

umount /dev/vdb
e2fsck -f /dev/vdb
resize2fs /dev/vdb
mount /dev/vdb /data

Operations for xfs file format operating system (such as CentOS7)

umount /dev/vdb
xfs_repair /dev/vdb
mount /dev/vdb /data
xfs_growfs /data

For hosts without data disks before the upgrade

After shutting down and upgrading, you need to do the following operations in the cloud host:

You can choose ext4 or xfs two file system formats to format the data disk

Set the data disk as ext4 file format (CentOS6’s default file system format) :

mkfs -t ext4 /dev/vdb 
mount /dev/vdb /data/

Edit /etc/fstab, write the corresponding configuration into fatab

/dev/vdb   /data  ext4  defaults,noatime 0 0

Setting the data disk as xfs format (CentOS7’s default file system format) :

mkfs.xfs /dev/vdb
mount -t xfs /dev/vdb /data

Edit /etc/fstab, add the following content

/dev/vdb /data xfs defaults,noatime 0 0

Windows operating system

Operating on the host, input diskpart.exe in cmd, list volume, select the logical volume to expand in size, enter the extended size extend [size=n], or extend all unallocated sizes to the selected logical volume

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