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|sponsor=EPSRC
 
|sponsor=EPSRC
 
|designer=Cray
 
|designer=Cray
|operator=EPCC
+
|operator=EPSRC
 
|introduction=March 2014
 
|introduction=March 2014
|retired=February 18, 2020
+
|retired=November 2019
|peak dpflops=2.551 petaFLOPS
+
|peak dpflops=2.6 petaFLOPS
 
|price=£43,000,000
 
|price=£43,000,000
 
|predecessor=HECToR
 
|predecessor=HECToR
|predecessor link=supercomputers/hector
+
|predecessor link=supercomputer/hector
 
|successor=ARCHER 2
 
|successor=ARCHER 2
|successor link=supercomputers/archer 2
+
|successor link=supercomputer/archer 2
 
}}
 
}}
 
'''ARCHER''' ('''Advanced Research Computing High End Resource''') is {{\\|HECToR}}'s successor, a [[petascale]] [[x86]] [[supercomputer]] serving as the UK's primary academic research supercomputer. ARCHER begun operations in March 2014 becoming the most powerful system in UK and the 19th most powerful on the [[TOP500]] at the time. ARCHER is expected to be succeeded by {{\\|ARCHER 2}} in 2020.
 
'''ARCHER''' ('''Advanced Research Computing High End Resource''') is {{\\|HECToR}}'s successor, a [[petascale]] [[x86]] [[supercomputer]] serving as the UK's primary academic research supercomputer. ARCHER begun operations in March 2014 becoming the most powerful system in UK and the 19th most powerful on the [[TOP500]] at the time. ARCHER is expected to be succeeded by {{\\|ARCHER 2}} in 2020.
 
== Overview ==
 
ARCHER is based on [[Cray]]'s XC30 MPP supercomputer.
 
 
=== System ===
 
 
<table class="wikitable">
 
<tr><th>Nodes</th><td>4920</td></tr>
 
<tr><th>CPU</th><td>[[Xeon E5-2697 v2]] (12c) @ 2.7 GHz</td></tr>
 
<tr><th>Cores</th><td>118,080</td></tr>
 
<tr><th>Peak Performance</th><td>2.551 [[petaFLOPS]] (DP)</td></tr>
 
</table>
 
 
=== Memory ===
 
There are 4544 standard memory nodes which have 64 GiB of memory shared between the two CPUs. Additionally, ARCHER features 376 high memory nodes which have 128 GiB of memory.
 
 
{| class="wikitable"
 
|-
 
! !! Standard !! High-Memory !! ARCHER
 
|-
 
| Node || 64 GiB || 128 GiB ||
 
|-
 
| Count || 4544 || 376 || 4920
 
|-
 
| Total || 47 TiB || 284 TiB || 331 TiB
 
|}
 
 
 
=== Interconnect ===
 
ARCHER relies on Cray Aries interconnect to interlink all the nodes. ARCHER uses a [[Dragonfly topology]]. There are four compute nodes connected per each Aries router, 188 nodes per cabinet, and two cabinets form a group. Groups are connected to each other with all-to-all optical connections. There are a total of 144 optical links per group for a peak system bisection bandwidth of over 19,013 GB/s. The MPI latency on Aries is ~1.3μs with an additional 100ns of latency when communicating over the optical links.
 
 
== Power ==
 
{| class="wikitable"
 
! Type !! Power
 
|-
 
| System (Zero load) || 400 kW
 
|-
 
| System (Full load) || 1,200 kW
 
|-
 
| Filesystems || 40 kW
 
|-
 
| Research Data Facility (RDF) || 120 kW
 
|}
 
 
== TOP500 ==
 
{| class="wikitable"
 
|-
 
! List !! Rank !! Rmax !! Rpeak
 
|-
 
| 06/2019 || 252 || rowspan="12" | 1,642.5 || rowspan="12" | 2,550.5
 
|-
 
| 11/2018 || 186
 
|-
 
| 06/2018 || 131
 
|-
 
| 11/2017 || 79
 
|-
 
| 06/2017 || 73
 
|-
 
| 11/2016 || 61
 
|-
 
| 06/2016 || 50
 
|-
 
| 11/2015 || 40
 
|-
 
| 06/2015 || 34
 
|-
 
| 11/2014 || 25
 
|-
 
| 06/2014 || 25
 
|-
 
| 11/2013 || 19
 
|}
 
 
== External links ==
 
* Official Website https://www.archer.ac.uk/
 

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designerCray +
discontinuation dateFebruary 18, 2020 +
introductory dateMarch 2014 +
logoFile:archer logo.png +
main imageFile:archer sc.jpg +
nameARCHER +
operatorEPCC +
peak flops (double-precision)2.551e+15 FLOPS (2,551,000,000,000 KFLOPS, 2,551,000,000 MFLOPS, 2,551,000 GFLOPS, 2,551 TFLOPS, 2.551 PFLOPS, 0.00255 EFLOPS, 2.551e-6 ZFLOPS) +
release price$ 53,086,419.75 (€ 47,777,777.78, £ 43,000,000.00, ¥ 5,485,419,753.09) +
sponsorEPSRC +