Current System Load - Full System

The plot below shows the status of nodes on the current ARCHER2 Full System service. A description of each of the status types is provided below the plot.

image

Note: the long running reservation visible in the plot corresponds to the short QoS which is used to support small, short jobs with fast turnaround time.

Service Alerts

The ARCHER2 documentation also covers some Known Issues which users may encounter when using the system.

Status Type Start End Scope User Impact Reason
Ongoing Service Alert 2023-12-06 09:00 2023-12-06 10:00 ARCHER2 login nodes Users will now connect using a ssh key and passphrase and a time-based one time password Enhance security

Previous Service Alerts

This section lists resolved service alerts from the past 30 days. A full list of historical resolved service alerts is available.

Status Type Start End Scope User Impact Reason
Resolved Service Alert 2023-11-22 10:00 2023-11-22 10:10 /work lustre file systems The change should take minutes and should not impact users Change in lustre configuration
Resolved Service Alert 2023-11-06 09:20 2023-11-06 11:40 Compute nodes All running jobs have failed, no new jobs can start on the compute nodes. An extenal power event has caused all ARCHER2 compute nodes to be unavailable
Resolved Service change 2022-12-12 09:45 N/A Compute nodes Users may see changes in application performance The default CPU frequency for parallel jobs started using `srun` has been changed to 2.0 GHz to improve the energy efficiency of ARCHER2. We recommend that users test the energy efficiency of their applications and set the CPU frequency appropriately.

Maintenance Sessions

This section lists recent and upcoming maintenance sessions. A full list of past maintenance sessions is available.

Status Type Start End Scope User Impact Reason
Planned Partial TBC ARCHER2 scheduler Running jobs will not be impacted. There will be several interruptions to the Slurm scheduler which means that users will not be able to submit new jobs and new jobs will not start. If users are impacted, you should wait a few minutes and then try to resubmit the job again. Updating the Slurm configuration
Planned Full TBC ARCHER2 Users will be unable to connect to ARCHER2 and will not have access to data on ARCHER2 Integrating the GPU nodes into ARCHER2

System Status mailings

If you would like to receive email notifications about system issues and outages, please subscribe to the System Status Notifications mailing list via SAFE

FAQ

Usage statistics

This section contains data on ARCHER2 usage for Oct 2023. Access to historical usage data is available at the end of the section.

Usage by job size and length

Heatmap of usage job size versus job length

Queue length data

The colour indicates scheduling coefficient which is computed as [run time] divided by [run time + queue time]. A scheduling coefficient of 1 indicates that there was zero time queuing, a scheduling coefficient of 0.5 means that the job spent as long queuing as it did running.

Heatmap of scheduling coefficient job size versus job length

Software usage data

Plot and table of % use and job step size statistics for different software on ARCHER2 for Oct 2023. This data is also available as a CSV file.

Plot of usage by different software

This table shows job step size statistics in cores weighted by usage, total number of job steps and percent usage broken down by different software for Oct 2023.

Software Min Q1 Median Q3 Max Jobs Nodeh PercentUse Users Projects
Overall 1 512.0 1331.0 12288.0 524288 1306427 3628968.1 100.0 798 122
Unknown 1 560.0 1536.0 8192.0 225280 260520 583508.6 16.1 370 93
VASP 1 512.0 640.0 1024.0 8192 115764 565846.7 15.6 142 13
LAMMPS 1 1280.0 38400.0 51200.0 131072 8992 358759.9 9.9 61 21
SENGA 32 15936.0 18432.0 24576.0 24576 153 290786.8 8.0 5 4
Met Office UM 1 1024.0 1152.0 6165.0 12544 13985 277626.7 7.7 48 6
CP2K 2 128.0 512.0 1024.0 5376 25451 247288.1 6.8 56 11
GROMACS 1 1000.0 1056.0 3072.0 7938 18100 180772.2 5.0 34 6
Xcompact3d 64 8192.0 8192.0 131072.0 524288 339 172369.4 4.7 17 9
CASTEP 1 250.0 768.0 1024.0 10240 197511 127354.9 3.5 47 5
Nektar++ 128 3840.0 6144.0 12800.0 15360 366 73298.3 2.0 8 2
GENE 1 8192.0 8192.0 20480.0 40960 189 67140.5 1.9 5 4
ONETEP 1 128.0 128.0 224.0 1024 1686 66641.3 1.8 7 1
MITgcm 1 240.0 624.0 624.0 900 28234 54792.9 1.5 11 3
OpenFOAM 1 512.0 1152.0 2048.0 8192 1993 50155.3 1.4 30 16
3DNS 950 11600.0 30512.0 50217.0 50217 35 44141.5 1.2 2 1
NEMO 1 1568.0 6528.0 6528.0 7232 16089 40191.5 1.1 19 4
FHI aims 32 128.0 128.0 512.0 4096 9781 36408.8 1.0 17 3
ChemShell 1 512.0 768.0 1152.0 5504 1020 36377.1 1.0 13 5
OpenSBLI 4096 16384.0 131072.0 131072.0 131072 78 35782.0 1.0 2 2
Quantum Espresso 1 512.0 1024.0 1024.0 2048 2982 34210.4 0.9 19 4
ptau3d 8 400.0 400.0 400.0 400 48 31648.5 0.9 2 1
EPOCH 8 2560.0 3840.0 11520.0 11520 708 29525.8 0.8 7 1
Code_Saturne 128 4000.0 4096.0 4096.0 16384 157 28756.9 0.8 4 2
CRYSTAL 96 128.0 608.0 1024.0 3072 1730 28489.8 0.8 9 2
Python 1 512.0 1280.0 16384.0 16384 553502 27061.2 0.7 54 24
CASINO 128 2048.0 8192.0 8192.0 16384 208 24903.3 0.7 2 1
EDAMAME 64 1331.0 1331.0 1331.0 3375 140 20811.5 0.6 2 1
a.out 1 2560.0 2560.0 2560.0 10240 851 19157.1 0.5 13 10
TPLS 128 512.0 512.0 2048.0 2048 185 17357.1 0.5 3 2
RMT 4 352.0 352.0 1536.0 2560 318 13080.7 0.4 5 1
GS2 1 2304.0 2304.0 2304.0 2304 37846 7721.2 0.2 5 2
NWChem 4 256.0 512.0 1024.0 2560 638 7564.2 0.2 11 6
HYDRA 1 2560.0 3840.0 3840.0 3840 577 6920.8 0.2 9 4
Nek5000 1280 2560.0 2560.0 2560.0 2560 276 6221.2 0.2 2 2
Smilei 8 256.0 256.0 256.0 256 128 4135.2 0.1 3 1
Cluster 1024 1024.0 1024.0 1024.0 1024 31 3399.5 0.1 1 1
CESM 64 256.0 256.0 256.0 1024 629 3305.1 0.1 17 2
iIMB 2304 2304.0 2304.0 3072.0 3840 18 2917.2 0.1 1 1
NAMD 512 512.0 512.0 512.0 512 20 613.0 0.0 1 1
SBLI 1 256.0 256.0 512.0 512 222 564.8 0.0 3 2
SIESTA 1 128.0 1280.0 1536.0 1536 4245 525.5 0.0 5 2
WRF 64 128.0 256.0 256.0 512 39 400.3 0.0 3 2
HANDE 1 4.0 8.0 16.0 16 395 245.4 0.0 1 1
DL_POLY 8 4096.0 16384.0 16384.0 16384 70 61.7 0.0 3 2
Arm Forge 4 1536.0 1536.0 1536.0 2048 104 59.6 0.0 6 5
HemeLB 10 768.0 768.0 768.0 768 3 26.3 0.0 1 1
DL_MESO 64 64.0 64.0 128.0 128 9 21.3 0.0 1 1
AxiSEM3D 48 48.0 48.0 48.0 48 18 14.8 0.0 1 1
SDPB 2 63.0 63.0 64.0 64 41 6.4 0.0 1 1
FVCOM 1 1.0 1.0 2.0 2 3 0.0 0.0 1 1

Historical usage data

Period Usage Heatmap Queue Heatmap Software usage plot Software usage data
Oct 2023 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Sep 2023 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Aug 2023 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Jul 2023 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Jun 2023 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
May 2023 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Apr 2023 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Mar 2023 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Feb 2023 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Jan 2023 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Dec 2022 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Nov 2022 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Oct 2022 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Sep 2022 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Aug 2022 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Jul 2022 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Jun 2022 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
May 2022 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Apr 2022 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Mar 2022 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Feb 2022 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Jan 2022 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)
Dec 2021 Usage heatmap (PNG) Queue heatmap (PNG) Software usage plot (PNG) Software usage and size data (CSV)