10. Management of Group Disk¶
The group disk is purchased using the points by the group manager, and all group member can access the shared storage freely.
Group disk is managed on the "TSUBAME group details" page. This page is reached by selecting "Manage your group" in the menu bar on the left and selecting the "Detailed Display" link for the target group on the Group List page.
Group disk operations can be performed from the usage option menu on the "TSUBAME Group Details" page.
10.1. Group disk capacity¶
The capacity of the group disk is limited by both total file size and the number of files (inodes) under them. For each 1TB unit of file size purchase, 2,000,000 inodes will become available.
The amount of space that can be stored on a group disk is limited by both the absolute size of the files stored under it and the number of files (inodes).
Available sizes and Number of files that can be saved(inode) depend on the storage used.
For more information on the different group disk areas and how to use them, see Group Disk.
| Storage area | PATH | Group disk capacity setting | Available sizes | Number of files that can be saved(inode) |
|---|---|---|---|---|
| High-speed storage area (SSD) | /gs/fs | 100GB unit | MAX 3TB | 2,000,000 / 1TB |
| Large-scale (Big) storage area (HDD) | /gs/bs | 1TB unit | MAX 100TB | 2,000,000 / 1TB |
10.2. The validity period of the group disk¶
The group disk status is reset once at the end of the fiscal year, and all group disks are in a grace state that can only be read and deleted.
The grace state lasts until mid-April, and unpurchased group disk space will become inaccessible after the grace period ends. It is necessary to purchase the group disk for the current fiscal year to continue using.
Also, group disk data will be deleted at any time after the grace period.
10.3. Increase or decrease group disk capacity¶
Warning
The group disk capacity can be set only by the group manager.
Group disks can be increase or decrease from the group disk setting button in the "Use options" section in the group details page.
In the "Group disk capacity" section, the current setting and usage of the group disk button are available. Click "Resize" button for the storage whose capacity you want to change, and the capacity change dialog will be displayed.
[ High-speed storage area ]
[ Large-scale (Big) storage area ]
Change the group disk size value in the size field on the dialog. After the change, click "Accept the above, change" button in the capacity change dialog to change the capacity from the current month.
When increasing the capacity, the required points from the specified month to the end of the year are deducted.
When reducing the capacity, points for the reduced capacity from the following month to the end of the fiscal year will be returned to the group.
Tips
In the following cases, the group disk capacity cannot be set.
- Insufficient points to increase capacity.
- The current disk usage exceeds the specified capacity after reduction.
In addition, depending on the monthly set capacity, actual usage may exceed the set capacity.
Please note that access restrictions will be applied if this condition persists.
For details, please refer to What to do when group disk usage is exceeded.
10.4. Confirmation of group disk usage¶
Group disk usage can be checked from the Group Disk Settings button under Usage Options on the Group Details screen.
The size/number of nodes in use/allocated for each storage path can be viewed.
Tips
Since the capacity setting of the group disk is done on a monthly basis, if the storage space reserved is smaller than that of the previous month, the size/inode count in use may exceed the reserved size.
If this condition persists, access restrictions will be applied, so please check at the beginning of each month to see if the excess has occurred.
For details, please refer to What to do when the group disk usage exceeds the reserved size.