A shared disk agent is an agent that manages the shared disks.
Data on the shared disks will be damaged if you try to access to write from multiple nodes (or servers).
Thus, to control the situations, we only mount the file system from an operation node and unmount it to prohibit writing access from a standby node.
A shared disk agent manage mounting and unmounting of disks and monitors whether it is writable.
Table of Contents
Adding
공유 디스크 리소스를 추가 합니다.
공유 디스크 리소스를 추가 하기 위해서는 사전에 추가 가능한 공유 디스크가 OS상에 구성되어 있어야 합니다.
- select a group → right click → 'Add Resource'.
- Select 'SharedDisk' from Resource Type lists and click 'Next' button.
- 사용자는 공유 디스크 의 파일시스템 타입, 양 노드의 볼륨 장치 파일 위치 그리고 마운트 지점 의 정보를 입력 해야 합니다.
볼륨 장치 파일의 위치를 모를 경우
'파일' 버튼을 눌러 다이얼로그상에서 장치 파일을 선택 할 수 있습니다.
[Figure] Finish Button Active after Entering All the Data - As Additional Settings, mount command option, forced to unmount option, filesystem check option is available.
[Figure] Additional setting view - 완료 버튼을 클릭하면 기본 공유 디스크 리소스가 추가 되며,
관리 웹 콘솔 상에서 바로 확인이 가능합니다.
Deleting
Select resource type →- right click → delete resource.
삭제된 리소스는 관리 웹콘솔 상에서 바로 사라집니다.
Status
The following table explains the status switching of the MCCS resource caused by a user's command and the status.
The command assumes that it is generated by a user.
Shared disk agent: Manages the shared disks registered in MCCS.
| Status | Agent command | Decription | Note |
|---|---|---|---|
Online The volume is unlocked. You can write to it. | Offline | Dismounts the volume and prevents user from writing/reading data to and from the disk. | |
| Monitoring | Checks if the volume is mounted and monitors if you can write to the volume by creating temporary files. | ||
Offline The volume is locked. You can neither read or write from and to the volume. | Online | Mounts the volume and allow user to write/read data to and from the disk. | |
| Monitoring | Checks if the volume is mounted and monitors if you can write to the volume by creating temporary files. | ||
Trouble The volume is online. But there is a problem caused by external elements. You cannot write to it. | Online | Mounts the volume and allow user to write/read data to and from the disk. | |
| Offline | Dismounts the volume and prevents user from writing/reading data to and from the disk. |
Attribute
공유 디스크 리소스의 고유 속성을 표시 합니다.
Attribute | Description | Type | Default | Edit | Note |
DevPath | Designate the path for the file of device to mount. | FILE | O | ||
DoFsck | If it is set to true, going online will execute a fsck on the volume. | BOOLEAN | false | O | |
FileSystem | Enter the type of file system used by the volume. | STRING | O | ||
| ForceUnmount | If it is set to true, going offline will forcefully unmount the device in use. | BOOLEAN | false | O | |
| FsckOpt | Enter the option used for fsck execution. | STRING | -a | O | |
| MountOpt | Enter the command option used for mounting. | STRING | O | ||
| MountPoint | Enter the absolute path for the mounting location. | DIRECTORY | O |
The attribute value is entered to register the resource, and you can change or check it in the 'Specified Attribute'.