更改任务资源请求

fsched（版本fsched-10.61 +）支持对运行中的任务更改资源请求，目前支持更改的参数包括：

MinMemoryNode
- 更改job需要的每节点最小内存(单位是MB)
MinCPUsNode
- 更改job需要的每节点最小cpu数

作用

通过更改运行中的任务的资源请求，可以在任务运行时减少多申请的资源，让节点上的其它因为资源不足pending的job能够运行

注意

任务运行时减少申请的资源，不会减少任务实际使用的资源，所以其它job运行后可能会使节点资源负载过高

集群配置

修改以下配置，以使用支持更改运行中任务资源请求的插件select/cons_tres_ex

SelectType=select/cons_tres_ex

示例1_如果修改

提交job，等待运行，修改MinMemoryNode

[root@head-1 ~]# srun -w compute-1 --mem 8000 sleep 120&
[1] 17033
[root@head-1 ~]# squeue
            JOBID PARTITION     NAME     USER ST       TIME  NODES NODELIST(REASON)
            289 partition    sleep     root  R       0:02      1 compute-1

[root@head-1 ~]# scontrol update job 289 MinMemoryNode=3000

查看修改后的MinMemoryNode

[root@head-1 ~]# scontrol show job 289
JobId=289 JobName=sleep
UserId=root(0) GroupId=root(0) MCS_label=N/A
Priority=4294901751 Nice=0 Account=root QOS=normal WCKey=*
JobState=RUNNING Reason=None Dependency=(null)
Requeue=1 Restarts=0 BatchFlag=0 Reboot=0 ExitCode=0:0
RunTime=00:00:24 TimeLimit=UNLIMITED TimeMin=N/A
SubmitTime=2024-12-05T14:01:30 EligibleTime=2024-12-05T14:01:30
AccrueTime=Unknown
StartTime=2024-12-05T14:01:30 EndTime=Unknown Deadline=N/A
SuspendTime=None SecsPreSuspend=0 LastSchedEval=2024-12-05T14:01:30
Partition=partition-9C3RA AllocNode:Sid=head-1:14475
ReqNodeList=compute-1 ExcNodeList=(null)
NodeList=compute-1
BatchHost=compute-1
NumNodes=1 NumCPUs=1 NumTasks=1 CPUs/Task=1 ReqB:S:C:T=0:0:*:*
TRES=cpu=1,mem=3000M,node=1,billing=1
Socks/Node=* NtasksPerN:B:S:C=0:0:*:* CoreSpec=*
MinCPUsNode=1 MinMemoryNode=3000M MinTmpDiskNode=0
Features=(null) DelayBoot=00:00:00
OverSubscribe=OK Contiguous=0 Licenses=(null) Network=(null)
Command=sleep 120
WorkDir=/root
Power=

提交job，等待运行，修改MinCPUsNode

[root@head-1 ~]# srun -w compute-1 --mincpus=3 sleep 120&
[1] 18209
[root@head-1 ~]# squeue
            JOBID PARTITION     NAME     USER ST       TIME  NODES NODELIST(REASON)
            290 partition    sleep     root  R       0:02      1 compute-1

[root@head-1 ~]# scontrol update job 290 MinCPUsNode=2

查看修改后的MinCPUsNode

[root@head-1 ~]# scontrol show job 290
JobId=290 JobName=sleep
UserId=root(0) GroupId=root(0) MCS_label=N/A
Priority=4294901750 Nice=0 Account=root QOS=normal WCKey=*
JobState=RUNNING Reason=None Dependency=(null)
Requeue=1 Restarts=0 BatchFlag=0 Reboot=0 ExitCode=0:0
RunTime=00:00:28 TimeLimit=UNLIMITED TimeMin=N/A
SubmitTime=2024-12-05T14:09:32 EligibleTime=2024-12-05T14:09:32
AccrueTime=Unknown
StartTime=2024-12-05T14:09:32 EndTime=Unknown Deadline=N/A
SuspendTime=None SecsPreSuspend=0 LastSchedEval=2024-12-05T14:09:32
Partition=partition-9C3RA AllocNode:Sid=head-1:14475
ReqNodeList=compute-1 ExcNodeList=(null)
NodeList=compute-1
BatchHost=compute-1
NumNodes=1 NumCPUs=2 NumTasks=1 CPUs/Task=1 ReqB:S:C:T=0:0:*:*
TRES=cpu=2,mem=1M,node=1,billing=2
Socks/Node=* NtasksPerN:B:S:C=0:0:*:* CoreSpec=*
MinCPUsNode=2 MinMemoryNode=1M MinTmpDiskNode=0
Features=(null) DelayBoot=00:00:00
OverSubscribe=OK Contiguous=0 Licenses=(null) Network=(null)
Command=sleep 120
WorkDir=/root
Power=

示例2_修改后使其它job运行

修改MinMemoryNode

[root@head-1 ~]# sinfo -Nel
Thu Dec  5 14:35:37 2024
NODELIST   NODES        PARTITION       STATE CPUS    S:C:T MEMORY TMP_DISK WEIGHT AVAIL_FE REASON
compute-1      1 partition-9C3RA*   allocated    4    4:1:1  13926        0      1   (null) none
compute-2      1 partition-9C3RA*        idle    4    4:1:1  13926        0      1   (null) none

[root@head-1 ~]# srun -w compute-1 --mem 8000 sleep 120&
[3] 22415
[2]   Done                    srun -w compute-1 --mincpus=3 sleep 120
[root@head-1 ~]# srun -w compute-1 --mem 8000 sleep 120&
[4] 22428
[root@head-1 ~]# srun: job 300 queued and waiting for resources

[root@head-1 ~]# squeue
            JOBID PARTITION     NAME     USER ST       TIME  NODES NODELIST(REASON)
            300 partition    sleep     root PD       0:00      1 (Resources)
            299 partition    sleep     root  R       0:04      1 compute-1

[root@head-1 ~]# scontrol update job 299 MinMemoryNode=2000
[root@head-1 ~]# srun: job 300 has been allocated resources

[root@head-1 ~]# squeue
            JOBID PARTITION     NAME     USER ST       TIME  NODES NODELIST(REASON)
            299 partition    sleep     root  R       0:31      1 compute-1
            300 partition    sleep     root  R       0:03      1 compute-1

修改MinCPUsNode

[root@head-1 ~]# sinfo -Nel
Thu Dec  5 14:35:37 2024
NODELIST   NODES        PARTITION       STATE CPUS    S:C:T MEMORY TMP_DISK WEIGHT AVAIL_FE REASON
compute-1      1 partition-9C3RA*   allocated    4    4:1:1  13926        0      1   (null) none
compute-2      1 partition-9C3RA*        idle    4    4:1:1  13926        0      1   (null) none

[root@head-1 ~]# srun -w compute-1 --mincpus=3 sleep 120&
[1] 21997
[root@head-1 ~]# srun -w compute-1 --mincpus=3 sleep 120&
[2] 22014
[root@head-1 ~]# srun: job 298 queued and waiting for resources

[root@head-1 ~]# squeue
            JOBID PARTITION     NAME     USER ST       TIME  NODES NODELIST(REASON)
            298 partition    sleep     root PD       0:00      1 (Resources)
            297 partition    sleep     root  R       0:03      1 compute-1

[root@head-1 ~]# scontrol update job 297 MinCPUsNode=1
[root@head-1 ~]# srun: job 298 has been allocated resources

[root@head-1 ~]# squeue
            JOBID PARTITION     NAME     USER ST       TIME  NODES NODELIST(REASON)
            297 partition    sleep     root  R       0:28      1 compute-1
            298 partition    sleep     root  R       0:04      1 compute-1

作用​

集群配置​

示例1_如果修改​

示例2_修改后使其它job运行​

作用

集群配置

示例1_如果修改

示例2_修改后使其它job运行