IPSJ SIG Technical Report Vol.2014-HPC-144 No /5/26 ES2 1,a) 1,b) 1,c) (ES2) The system architecture and operation results of the Earth Simulato

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1 ES2 1,a) 1,b) 1,c) (ES2) The system architecture and operation results of the Earth Simulator (ES2) Ken ichi Itakura 1,a) Hitoshi Uehara 1,b) Toshiyuki Asano 1,c) Abstract: This paper describes the system architecture and operation results for five year of the Earth Simulator (ES2) which is operated by Japan Agency for Marine-Earth Science and Technology (JAMSTEC). we show the evaluation of the operating efficiency of the whole system and the execution situation of a user request based on the kind of the track record data for five years which are outputted in the real operation. 1. (JAMSTEC) [1] NEC SX-9/E (ES2 ) ES ES ES2 ES2 1 JAMSTEC a) itakura@jamstec.go.jp b) uehara@jamstec.go.jp c) asanot@jamstec.go.jp 1 ES2 Fig. 1 ES2 System Outline 2.1 ES2 160 Fat-Tree 102.4GFLOPS 8 128GB TFLOPS 20TB c 2014 Information Processing Society of Japan 1

2 D3-10 (300GB 15krpm * 72, RAID5 *8 D3-10 (SATA 750GB 7200rpm * 113 RAID6 *26 2 Fig Storage System Outline 2 Fat-Tree GB/sec HOME DATA 1.5PB TB 3TB 2.2 NQSII ES2 Network Queuing System II(NQSII) 3 ES2 L S 2 L S L S CPU L CPU 3 ES2 Fig. 3 Queuing System on ES2 ( 1 ) ( 2 ) ( 3 ) ( 4 ) ( 5 ) (1) (2) (3) (4) c 2014 Information Processing Society of Japan 2

3 1 5 Table 1 Node Usage in 5 years H % 10.09% 9.59% 1.48% 6.08% H % 5.61% 0.81% 0.73% 6.45% H % 6.45% 3.94% 1.41% 3.58% H % 8.94% 4.79% 0.67% 3.17% H % 6.59% 0.35% 0.90% 9.19% Fig. 4 Node Usage FY2013 ES2 1 (S/L): S L : : : (S/L): S L (S/L): S L Web ID L L L L S S CPU S S CPU pre-run post-run rerun hold delete I/O GFLOPS GOPS L 48 3TB 1.5TB ES ES c 2014 Information Processing Society of Japan 3

4 ES ES2 Fig. 5 Node Usage in 5 years 15% ES2 NQSII 1 9, /4/1 2014/3/31 1 L 92,530 77,202 12/1 12/ L 2.5GB 75GB 63% 2.5GB 75GB 65%ES Stage IN (B) 6 Fig. 6 Histgram of Stage-in data amount L 25GB 500GB 92% TAT 9 10 c 2014 Information Processing Society of Japan 4

5 情報処理学会研究報告 ᗘ (B/sec) 䝸䜽䜶䝇䝖 㔞(B) Stage OUT 䝕䞊䝍㔞 (B) 図 7 1.E+05 ステージアウトのデータ量ヒストグラム 図 9 Fig. 7 Histgram of Stage-out data amount 1.E+10 1.E+11 1.E+12 1.E+13 ステージインのデータ量と転送速度の関係 Fig. 9 Data amount v.s. transfer speed in Stage-in ᗘ (B/sec) 䝸䜽䜶䝇䝖 1.E E E E E+01 㔞(B) L 䝽䞊䜽䝕䝇䜽ᐉゝ (B) 1.E+00 1.E+00 1.E+01 1.E+02 図 10 図 8 L 系ワークデスク使用量ヒストグラム 1.E+03 1.E+04 1.E+05 1.E+10 1.E+11 1.E+12 1.E+13 ステージアウトのデータ量と転送速度の関係 Fig. 10 Data amount v.s. transfer speed in Stage-out Fig. 8 Histgram of work disk usage in L batch requests の評価は 各運用機関の中で運用主体者とメーカ ユーザ 送速度の関係 ステージアウトのデータ量と転送速度の関 が一体となって行われており アカデミックな報告として 係を示す どちらの場合でも データ量が少ない場合には はあまり例がない ここでは 本論文で示したような実シ ファイル I/O に必要となる固定のオーバーヘッド時間が支 ステムのジョブ履歴情報がジョブ管理システムの改良やシ 配的となり 転送時間が数秒の単位で固定となる 現在の ステム評価に利用されている例を示したい リクエスト単位で収集する統計データは秒単位で丸められ まず 宇野らは [2] において ジョブスケジューリング ているため 1 秒から 10 秒未満の時間のリクエストが集中 の方式をソフトウェアシミュレーションによって解析し する傾向があり 図で左側の部分にすじ状の分布となって 特にファイルステージングにおけるファイルアクセス競合 現れる データ転送量が十分ある場合には 転送スピード によって帯域が減少した場合のスケジューリングに及ぼす は 10MB/sec から 100MB/sec で行われている 但し 特 影響を検討している この時には実際の 京 コンピュー にステージインの場合に数 MB/sec しか出ていないケース タの運用を考慮しつつ 複数のタイプのジョブミックスを も多く見られる ES2 のステージングファイルはユーザが 想定して評価を行っている ユーザ層が等しいようなシス ジョブスクリプトに明記し その記述に従ってデータ転送 テムの検討では実システムのジョブミックスを利用するこ が行われる 実際には図 2 のクラスタ内にある IOCS と呼 とも十分に検討できる ばれる Linux ワークステーションが HOME DATA 領域 次に Wong らは [3] において ESP(Effective System と WORK 領域の間でコピー処理を行う 各ストレージ領 Performance) test というシステムレベルでの大型計算機 域内でのコンフリクトが起きている可能性があり ユーザ の性能評価をする手法を提案している ここでは 単純な のジョブスクリプトに無駄が無いかコンサルティングを プログラムの計算性能だけでなく ジョブハンドリングの 行っていく必要がある 効率やシステムのシャットダウン ブートアップの時間も 5. 関連研究 直接的に大型計算機の運用結果に基づいたシステム構成 c 2014 Information Processing Society of Japan 含めて評価する取り組みとなっている ここでもシステム を評価するにあたり 実運用のジョブミックスを用いるこ とは重要と考えられており そのようなデータは貴重だと 5

6 6. ES2 5 ES2 [1] :, Vol45, NO.2,, Feb. 15, [2] :, 12-HPC-136(22),, Oct. 4, [3] Adrian Wong, Leonid Oilker, William Kramer, Teresa Kaltz and David Bailey: System Utilization Benchmark on the Cray and IBM SP The 6th Workshop on Job Scheduling Strategies for Parallel Processing, April 19, c 2014 Information Processing Society of Japan 6

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