Using backups

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Introduction to Backup service

What is the Backup service?

Backup is a service provided to guarantee our customers' business continuity by backing up and storing important data in cloud servers (VMs), and then restoring data in case of emergency.
As can be seen from recent natural disasters and computer accidents both domestically and abroad, this service can prevent problems such as deterioration of corporate reputation and credibility among its customers if data is not securely recovered in case of accidents.

When you request subscription to the Backup service, the first thing to do is to install the backup agent. The Backup service is then set up according to the backup policy requested by the person in charge of the Backup service, and backups are performed at a designated cycle and time. Daily backup reports are created and sent to the person in charge, which is set in advance.

Backup service features

Introduction to backup features

Provided backup types

NAVER Cloud Platform provides backups for all the OS platform file systems provided within NAVER Cloud Platform, as well as online backups for DBMS (MSSQL, MySQL). This securely protects data. Recovery of backup is possible from files to folders for file systems, and from tables to DBs for DBMS.

Backup method

Full backup and incremental backup are provided as basic backup methods, and the two can be combined to form effective backup policies, as detailed below. However, the longest cycle provided for DBMS is up to 1 week given its importance.

• Full backup: All data in the backup directory is backed up.

• Incremental backup: Only the data that has been changed since the last full backup, and is in the backup directory, is backed up.

• Caution: In case of incremental backup (backup for data with changes only), the consistency is guaranteed for DBMS, but not for files.

Retention cycle

Data backed up using NAVER Cloud Platform's Backup service can be retained for between 1 and 52 weeks. The data is maintained and managed according to the retention cycle requested upon subscription. The retention cycle can be modified in the middle. However, a retention cycle must be at least twice as long as the data's backup cycle.

Getting started with Backup service

Request Backup service subscription

See below for the procedure that starts with the initial start of the Backup service and ends with the result reporting.

1. Go to the NAVER Cloud Platform portal (https://www.ncloud.com) and log in.

2. Click Support > Library in the portal, and download the NAVER Cloud Platform Backup service request form and backup agent.

• The path is only accessible after logging in.

3. Fill in the downloaded form, refer to the examples provided. If you have any questions related to filling the form or other requests, then feel free to write your inquiry in the "Backup customer inquiry" field.

4. The downloaded backup agent can be installed by copying the version for your OS to the VM.

Set port forwarding for VM access

• Select a server to install the backup agent on from the management console page, and then click [Set port forwarding].

• Set up a port for external connection.

How to install the backup agent on a Windows VM

• Access the VM server remotely using Remote Desktop. Refer to the external connection IP and port information set in Port forwarding.

• Connect to the Windows VM. Copy the backup agent installation file (NCP_Backup_Windows.zip) downloaded from the NAVER Cloud Platform portal under the VM's c:\temp and unzip it. A total of 5 files with NCP names will be created.

• Run NCP_Backup_Install.bat in the folder with the unzipped files. The installation and configuration will be done automatically. The files related to the backup agent will automatically be deleted after the installation is completed. (The files are automatically deleted after the backup agent installation. Make sure to set the installation location to C:\Temp before you proceed with the installation.)

How to install the backup agent on a Linux VM

• Run a copy program between Windows/Linux first. Copy the backup agent program (NCP_Backup_Linux.tar.gz) under the VM server's /tmp, using the external connection IP and port information set in Port forwarding. (WinSCP is used in the example.)
  

• Access the VM server remotely using a remote access program (e.g., PuTTY). Refer to the external connection IP and port information set in Port forwarding.

• Connect to the Linux VM, go to the /tmp folder where the backup agent program is saved. Run tar xvfz NCP_Backup_Linux.tar.gz to decompress it.

• Run NCP_Backup_Install.sh in the folder with decompressed files, the backup agent installation and configuration will be completed automatically. Related files are automatically deleted. (The files are automatically deleted after the backup agent installation. Make sure to run the installation in the /tmp folder.)

5. Once you have the backup agent installed, click "Contact us" from the Backup service introduction page within the NAVER Cloud Platform portal, name your inquiry "Backup service request," and attach the Backup service request form. This will complete your Backup subscription request.

Reporting in Backup service

Backups are done at the requested cycle once the backup request is completed for a VM server. The backed up data is stored according to the retention cycle. The backup result is shared to the requester's email along with major daily items for their viewing.

• Daily backup report: A report is sent to the email address provided in the backup request at 10:00 AM every day.
• Monthly backup report: It can be provided up to 1 month upon separate request.

Cancel Backup service subscription

Download the NAVER Cloud Platform Backup service request form, select the "Backup service cancellation" item from the services available for request in the document, and then fill in the form according to the details of your cancellation. Click "Contact us" from the Backup service introduction page. Name your inquiry "Backup service cancellation," and then upload the file you filled out to request the cancellation.

However, if there are changes to your backup service details due to servers or other resources being deleted or rearranged while using the service, then you have to go through the following procedure. Cancel the Backup service subscription for the deleted servers, and then update the Backup service for servers that were rearranged through a re-request.

Recovery service

Download the NAVER Cloud Platform Backup service request form, select the "Recovery service" item from the services available for request in the document, and then fill in the form according to the purpose of recovery. Click "Contact us" from the Backup service introduction page. Name your inquiry "Recovery service request," and then upload the file you filled out to request the recovery. The recovery request will be carried out within 3 working hours. If the request has been made after working hours, then the recovery will be completed the next day. If it is an emergency recovery request due to failure, then submit it as a failure inquiry for prompt service. (Working hours are 10:00 AM - 7:00 PM, public holidays excluded.)

Note

For databases, the environments of the original server and recovery target server must be identical.

• MSSQL - The versions of DB and backup agent must match.
• MySQL - The versions of the OS, DB, and backup agent must match. The directories of installation, base, and MySQL data must match.

Backup software

• Quest NetVault (formerly Dell NetVault)

Backup software communication information

• TCP/UDP 20031~21631

Backup program installation location

• Linux: /usr/Netvault
• Windows: C:\Program Files (x86)\Quest Software\NetVault Backup

Backup program daemon information

• nvcmgr: daemon for device
• nvnmgr: daemon for network
• nvstatsmngr: daemon for status
• nvpmgr: backup process daemon
• nvfs: backup daemon (activated only during a backup)

Start/stop backup daemon

/usr/Netvault/etc/startup.sh start
/usr/Netvault/etc/startup.sh stop