Reprints from my posting to SAN-Tech Mailing List and ...


[san-tech][03337] IBM: NCSA Blue Watersキャンセルだ!, Aug. 8, 2011, Effective August 6, 2011

Date: Tue, 09 Aug 2011 03:39:33 +0900
※Blue Waters Interconnect Network情報追加 (09 Aug 2011 21:13:59 +0900)


"Blue Waters Update-NCSA/IBM Joint Statement"
 Aug. 8, 2011, Effective August 6, 2011

  "IBM terminated its contract with the University of Illinois to provide
   the supercomputer for the National Center for Supercomputing Applications'
   Blue Waters project."

  "NCSA is confident that its goal of building a sustained-petascale
   supercomputer remains achievable in a timely manner. NCSA is
   coordinating with the National Science Foundation to ensure project
   continuity and that the goals of the project are achieved."
  "IBM will return money received to date and NCSA will return equipment
   delivered by IBM per terms of the contract."

関連記事 (と言っても上のプレスリリースがメイン)

"IBM Cancels Blue Waters"
 Aug 8, 2011, insideHPC


"IBM yanks chain on 'Blue Waters' super"
 Power7 petaflops behemoth gets flushed
 8th August 2011, The Register

"IBM Bails on Blue Waters Supercomputer"
 August 08, 2011, HPCwire

Date: Tue, 09 Aug 2011 21:13:59 +0900

今さらながら、NCSA Blue Waters Interconnect Network についてのおさらい:

"Blue Waters:
 Leading the Way in Sustained Petascale Computing"
 Thom Dunning, Director,
 National Center for Supercomputing Applications (NCSA),
 University of Illinois at Urbana-Champaign (UIUC), USA
 DEISA PRACE Symposium (13-14 April, 2011, Helsinki, Finland)

*)Logical View of Blue Waters Interconnect (Page 9 - 11)

*)Two-level (L, D) Direct-connect Network (Page 12)

  Each Supernode = 32 QCMs (4 Drawers x 8 SMPs/Drawer)
  Fully Interconnected with Llocal and Lremote Links
  *)Lremote links between drawers in supernode (240 GB/s)
  Blue Waters = 320 Supernodes (40 BBs x 8 SNs/BB)
  Fully Interconnected with D Links
  *)D-links between supernodes (320 GB/s)
  *)BB: 3-Rack Building Block (Each BB = 8 Supernodes)

*)Blue Waters vs. Other Future Systems (Page 15)
Interconnect Topology Bisection Bandwidth                          (TB/s)  [Peak PF]
  NCSA Blue Waters (IBM PERSC, IBM Power 7): 2-Level Direct, ~500    [10]
  ANL Mira (IBM BlueGene, PowerPC):                5D Torus,          30**  [10]
  RIKEN K-Computer (Fujitsu SPARC64 VIIIfx):   Mesh/Torus       >30   [>10]

Documents, Partnership for Advanced Computing in Europe (PRACE)
[san-tech][03220] IBM Power 775:光ファイバー (120Gbps) で筐体間を接続
  Date: Tue, 28 Jun 2011 22:20:49 +0900

0 件のコメント: