It is managed disk which multiple nodes share.
Within a cluster, the application may be store the data on shared disk when it is equipped.
MCCS manages the Unmount / Mount of the disk and monitors it is read/writable state. MCCS attach the shared disk to the only node to prevent file system corruption.
Table of Contents
Adding
Add the shared disk resource.
Before adding the shared disk resource, be make sure that the driver letter should be located in the external shared storage.
- When add a resource from a group name, select a group → right click → 'Add Resource'. Or select Edit(E) from the main menu bar → select 'Add Resource'. Or select 'Add Resource' icon from the tool bar.
- Select 'SharedDisk' from Resource Type lists and click 'Next' button. When add a resource from the shared disk resource type name, this step will be skipped.
Enter the resource name. Enter the file system type, volume device file location and mount point or click the
to browse these informations. 공유 디스크 리소스로 사용할 디스크는 양 노드간 동일한 드라이브 문자를 가져야 합니다.
로컬 디스크의 드라이브 문자도 목록에 보여지므로 정확한 드라이브 문자를 선택합니다.
[Figure] Finish Button Active after Entering All the Data- As Additional Settings, mount command, forced to unmount and filesystem check options are available and click 'OK' button.
[Figure] Additional setting view - Click 'Finish' button to add the shared disk resource.
Deleting
Select resource type →- right click → delete resource.
State
The following table explains the state of shared disk resource.
공유 디스크 에이전트: MCCS 에 등록된 공유 디스크를 관리합니다.
| State | Agent command | Decription | Note |
|---|---|---|---|
Online The volume is unlocked and is accessible. | Offline | It unmounts the shared disk. The disk cannot accessible from the node. | |
| Monitoring | Checks whether the volume is mounted and temp text file are created to monitor whether the disk is available. | ||
Offline The volume is locked and is not accessible to read/write. | Online | It mounts the shared disk. The disk can accessible from the node. | |
| Monitoring | Checks whether the volume is mounted and temp text file are created to monitor whether the disk is available. | ||
Fault The disk is unavailable due to errors caused by external factors or failure while it is online. | Online | It mounts the shared disk. The disk can accessible from the node. | |
| Offline | It unmounts the shared disk. The disk cannot accessible from the node. |
Attribute
Shows the specified attribute of shared disk resource.
Attribute | Description | Type | Default | Edit | Note |
| ChkDskTimeout | It is timeout limit to complete or stop the check disk of the shared disk before attaching it . If value is '0', MCCS waits to complete the check disk before attaching it. | INTEGER | 0 | O | |
DevPath | Defines absolute path of device that will be mount. | STRING | O | ||
DoFsck | If set to true, fsck will be performed when the shared disk is brought online. | BOOLEAN | false | O | |
FileSystem | Defines file system type of the shared disk. | STRING | O | ||
| ForceUnmount | If it is set to true, the shared disk will be forcefully unmounted when it is taken offline even tough it has been used. | BOOLEAN | false | O | |
| FsckOpt | Defines fsck options. | STRING | -a | O | |
| MountOpt | Defines mount options | STRING | O | ||
| MountPoint | Defines absolute path for the mounting location. | DIRECTORY | O | ||
| IOTest | 'true'로 설정되면 Disk IO 상태를 체크합니다. | BOOLEAN | true | O |
Specified attribute values are normally entered when add the resource, This value can be edited or viewed through 'Specified Attribute' table in the Resource Attributes tab on the detailed information panel.