Editing supercomputers/archer

{{sc title|ARCHER}}
{{supercomputer
|name=ARCHER
|logo=archer logo.png
|image=archer sc.jpg
|sponsor=EPSRC
|designer=Cray
|operator=EPSRC
|introduction=March 2014
|retired=November 2019
|peak dpflops=2.551 petaFLOPS
|price=£43,000,000
|predecessor=HECToR
|predecessor link=supercomputer/hector
|successor=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.

== 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
|}
designer	Cray +
discontinuation date	February 18, 2020 +
introductory date	March 2014 +
logo	+
main image	+
name	ARCHER +
operator	EPCC +
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) +
sponsor	EPSRC +