This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
cluster:100 [2011/03/27 21:38] hmeij |
cluster:100 [2011/03/28 13:20] hmeij |
||
---|---|---|---|
Line 4: | Line 4: | ||
==== Quotas ==== | ==== Quotas ==== | ||
- | 03/ | + | On 03/ |
Here is what was put in place, and will mature over time. But first, it is important to understand: | Here is what was put in place, and will mature over time. But first, it is important to understand: | ||
- | * A quota is not disk space allocated for you, as in reserved. | + | * A quota is not disk space allocated for you, as in reserved. |
- | * Reason for quotas: to avoid the /home to fill up by a runaway process, and constrain | + | * Reason for quotas: to avoid /home from filling |
- | The quotas fall into two tiers: the sliding tier and the custom tier. In the sliding tier, when you reach your soft limit, notify HPC admins and your quota will slide to the next strata (<100G, <250G, <500G, <750G). Once you reach the last strata, and you still need more disk space, you enter the custom tier. | + | The quotas fall into two tiers: the sliding tier and the custom tier. |
+ | |||
+ | * In the sliding tier, when you reach your soft limit, notify HPC admins and your quota will slide to the next strata (<100G, <250G, <500G, <750G). Once you reach the last strata, and you still need more disk space, you enter the custom tier. | ||
+ | * In the custom tier, we set a quota after agreeing on size and availability of disk space, plus 100G. Then you are on your own. | ||
We urge all users to consider archiving data and files off the cluster disk array. | We urge all users to consider archiving data and files off the cluster disk array. | ||
- | How to find my quota? | + | How to find my quota? |
+ | |||
+ | * The hard block limit is the absolute maximum amount of disk space that a user can use. Once this limit is reached, no additional disk space can be used. Writes to disks will fail. | ||
+ | * The soft block limit defines the maximum amount of disk space that can be used. Unlike the hard limit, the soft limit can be exceeded for a certain amount of time. That time is known as the grace period. | ||
+ | * The grace period is globally set for 7 days. | ||
+ | |||
+ | < | ||
+ | |||
+ | [hmeij@greentail ~]$ quota -v hmeij | ||
+ | |||
+ | Disk quotas for user hmeij (uid 8216): | ||
+ | | ||
+ | / | ||
+ | 1227284 | ||
+ | |||
+ | </ | ||