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Resources Allocation Policy
===========================
Resources Allocation Policy
---------------------------
The resources are allocated to the job in a fairshare fashion, subject
to constraints set by the queue and resources available to the Project.
The Fairshare at Anselm ensures that individual users may consume
approximately equal amount of resources per week. Detailed information
in the [Job scheduling](job-priority.html) section. The
resources are accessible via several queues for queueing the jobs. The
queues provide prioritized and exclusive access to the computational
resources. Following table provides the queue partitioning overview:
|queue |active project |project resources |nodes<th align="left">min ncpus*<th align="left">priority<th align="left">authorization<th align="left">walltime |
| --- | --- |
|<strong>qexp</strong>\ |no |none required |32 nodes, max 8 per user |24 |>150 |no |1 / 1h |
|<strong>qprod</strong>\ |yes |> 0 |>1006 nodes, max 86 per job\ |24 |0 |no |24 / 48h |
|<strong>qlong</strong>Long queue |yes |> 0 |256 nodes, max 40 per job, only non-accelerated nodes allowed |24 |0 |no |72 / 144h |
|<strong>qmpp</strong>Massive parallel queue |yes |> 0 |1006 nodes |24 |0 |yes |2 / 4h |
|<strong>qfat</strong>UV2000 queue |yes |> 0\ |1 (uv1) |8 |0 |yes |24 / 48h |
|<strong>qfree</strong>\ |yes |none required |752 nodes, max 86 per job |24 |-1024 |no |12 / 12h |
|<strong><strong>qviz</strong></strong>Visualization queue |yes |none required |2 (with NVIDIA Quadro K5000) |4 |150 |no |1 / 2h |
The qfree queue is not free of charge**. [Normal
accounting](resources-allocation-policy.html#resources-accounting-policy)
applies. However, it allows for utilization of free resources, once a
Project exhausted all its allocated computational resources. This does
not apply for Directors Discreation's projects (DD projects) by default.
Usage of qfree after exhaustion of DD projects computational resources
is allowed after request for this queue.
- **qexp**, the \: This queue is dedicated for testing and
running very small jobs. It is not required to specify a project to
enter the qexp. >*>There are 2 nodes always reserved for
this queue (w/o accelerator), maximum 8 nodes are available via the
qexp for a particular user. *The nodes may be
allocated on per core basis. No special authorization is required to
use it. The maximum runtime in qexp is 1 hour.
- **qprod**, the \***: This queue is intended for
normal production runs. It is required that active project with
nonzero remaining resources is specified to enter the qprod. All
nodes may be accessed via the qprod queue, however only 86 per job.
** Full nodes, 24 cores per node are allocated. The queue runs with
medium priority and no special authorization is required to use it.
The maximum runtime in qprod is 48 hours.
- **qlong**, the Long queue***: This queue is intended for long
production runs. It is required that active project with nonzero
remaining resources is specified to enter the qlong. Only 336 nodes
without acceleration may be accessed via the qlong queue. Full
nodes, 24 cores per node are allocated. The queue runs with medium
priority and no special authorization is required to use it.>
*The maximum runtime in qlong is 144 hours (three times of the
standard qprod time - 3 * 48 h)*
- >***qmpp**, the massively parallel queue. This queue is
intended for massively parallel runs. It is required that active
project with nonzero remaining resources is specified to enter
the qmpp. All nodes may be accessed via the qmpp queue. ** Full
nodes, 24 cores per node are allocated. The queue runs with medium
priority and no special authorization is required to use it. The
maximum runtime in qmpp is 4 hours. An PI> *needs explicitly*
ask [support](https://support.it4i.cz/rt/)
for authorization to enter the queue for all users associated to
her/his Project.
- >***qfat**, the UV2000 queue. This queue is dedicated
to access the fat SGI UV2000 SMP machine. The machine (uv1) has 112
Intel IvyBridge cores at 3.3GHz and 3.25TB RAM. An PI> *needs
explicitly* ask
[support](https://support.it4i.cz/rt/) for
authorization to enter the queue for all users associated to her/his
Project.***
- **qfree**, the \***: The queue qfree is intended
for utilization of free resources, after a Project exhausted all its
allocated computational resources (Does not apply to DD projects
by default. DD projects have to request for persmission on qfree
after exhaustion of computational resources.). It is required that
active project is specified to enter the queue, however no remaining
resources are required. Consumed resources will be accounted to
the Project. Only 178 nodes without accelerator may be accessed from
this queue. Full nodes, 24 cores per node are allocated. The queue
runs with very low priority and no special authorization is required
to use it. The maximum runtime in qfree is 12 hours.
- **qviz**, the Visualization queue***: Intended for
pre-/post-processing using OpenGL accelerated graphics. Currently
when accessing the node, each user gets 4 cores of a CPU allocated,
thus approximately 73 GB of RAM and 1/7 of the GPU capacity
(default "chunk"). *If more GPU power or RAM is required, it is
recommended to allocate more chunks (with 4 cores each) up to one
whole node per user, so that all 28 cores, 512 GB RAM and whole GPU
is exclusive. This is currently also the maximum allowed allocation
per one user. One hour of work is allocated by default, the user may
ask for 2 hours maximum.*
To access node with Xeon Phi co-processor user needs to specify that in
[job submission select
statement](job-submission-and-execution.html).
### Notes
The job wall clock time defaults to **half the maximum time**, see table
above. Longer wall time limits can be [set manually, see
examples](job-submission-and-execution.html).
Jobs that exceed the reserved wall clock time (Req'd Time) get killed
automatically. Wall clock time limit can be changed for queuing jobs
(state Q) using the qalter command, however can not be changed for a
running job (state R).
Salomon users may check current queue configuration at
<https://extranet.it4i.cz/rsweb/salomon/queues>.
### Queue status
Check the status of jobs, queues and compute nodes at
[https://extranet.it4i.cz/rsweb/salomon/](https://extranet.it4i.cz/rsweb/salomon)
Display the queue status on Salomon:
`
$ qstat -q
`
The PBS allocation overview may be obtained also using the rspbs
command.
`
$ rspbs
Usage: rspbs [options]
Options:
--version show program's version number and exit
-h, --help show this help message and exit
--get-server-details Print server
--get-queues Print queues
--get-queues-details Print queues details
--get-reservations Print reservations
--get-reservations-details
Print reservations details
--get-nodes Print nodes of PBS complex
--get-nodeset Print nodeset of PBS complex
--get-nodes-details Print nodes details
--get-jobs Print jobs
--get-jobs-details Print jobs details
--get-jobs-check-params
Print jobid, job state, session_id, user, nodes
--get-users Print users of jobs
--get-allocated-nodes
Print allocated nodes of jobs
--get-allocated-nodeset
Print allocated nodeset of jobs
--get-node-users Print node users
--get-node-jobs Print node jobs
--get-node-ncpus Print number of ncpus per node
--get-node-allocated-ncpus
Print number of allocated ncpus per node
--get-node-qlist Print node qlist
--get-node-ibswitch Print node ibswitch
--get-user-nodes Print user nodes
--get-user-nodeset Print user nodeset
--get-user-jobs Print user jobs
--get-user-jobc Print number of jobs per user
--get-user-nodec Print number of allocated nodes per user
--get-user-ncpus Print number of allocated ncpus per user
--get-qlist-nodes Print qlist nodes
--get-qlist-nodeset Print qlist nodeset
--get-ibswitch-nodes Print ibswitch nodes
--get-ibswitch-nodeset
Print ibswitch nodeset
--summary Print summary
--get-node-ncpu-chart
Obsolete. Print chart of allocated ncpus per node
--server=SERVER Use given PBS server
--state=STATE Only for given job state
--jobid=JOBID Only for given job ID
--user=USER Only for given user
--node=NODE Only for given node
--nodestate=NODESTATE
Only for given node state (affects only --get-node*
--get-qlist-* --get-ibswitch-* actions)
--incl-finished Include finished jobs
`
Resources Accounting Policy
-------------------------------
### The Core-Hour
The resources that are currently subject to accounting are the
core-hours. The core-hours are accounted on the wall clock basis. The
accounting runs whenever the computational cores are allocated or
blocked via the PBS Pro workload manager (the qsub command), regardless
of whether the cores are actually used for any calculation. 1 core-hour
is defined as 1 processor core allocated for 1 hour of wall clock time.
Allocating a full node (24 cores) for 1 hour accounts to 24 core-hours.
See example in the [Job submission and
execution](job-submission-and-execution.html) section.
### Check consumed resources
The **it4ifree** command is a part of it4i.portal.clients package,
located here:
<https://pypi.python.org/pypi/it4i.portal.clients>
User may check at any time, how many core-hours have been consumed by
himself/herself and his/her projects. The command is available on
clusters' login nodes.
`
$ it4ifree
Password:
PID Total Used ...by me Free
-------- ------- ------ -------- -------
OPEN-0-0 1500000 400644 225265 1099356
DD-13-1 10000 2606 2606 7394
`