{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:QGL3P37LBFRH33NLVZDBRRXBOW","short_pith_number":"pith:QGL3P37L","canonical_record":{"source":{"id":"1903.06648","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2019-01-31T08:32:25Z","cross_cats_sorted":[],"title_canon_sha256":"5805ed5b5ed1df74f6427f45c49ea8e97ea15d83fd34e338d904ffe1e95283d7","abstract_canon_sha256":"c5a001d21945c238813248d8323ab8b52996fdce530c1b09d394f274e30b0ac8"},"schema_version":"1.0"},"canonical_sha256":"8197b7efeb09627dedabae4618c6e175b62ca97b2c5c2a544023f13c587e5718","source":{"kind":"arxiv","id":"1903.06648","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.06648","created_at":"2026-05-17T23:51:10Z"},{"alias_kind":"arxiv_version","alias_value":"1903.06648v1","created_at":"2026-05-17T23:51:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.06648","created_at":"2026-05-17T23:51:10Z"},{"alias_kind":"pith_short_12","alias_value":"QGL3P37LBFRH","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"QGL3P37LBFRH33NL","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"QGL3P37L","created_at":"2026-05-18T12:33:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:QGL3P37LBFRH33NLVZDBRRXBOW","target":"record","payload":{"canonical_record":{"source":{"id":"1903.06648","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2019-01-31T08:32:25Z","cross_cats_sorted":[],"title_canon_sha256":"5805ed5b5ed1df74f6427f45c49ea8e97ea15d83fd34e338d904ffe1e95283d7","abstract_canon_sha256":"c5a001d21945c238813248d8323ab8b52996fdce530c1b09d394f274e30b0ac8"},"schema_version":"1.0"},"canonical_sha256":"8197b7efeb09627dedabae4618c6e175b62ca97b2c5c2a544023f13c587e5718","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:10.228384Z","signature_b64":"SgpkKAuLDcws2m/dMrQeJzE5+xpa3iaMIEk1TESZiQ6LgOXDVYjYY9718aYixGfnsFuWy3N/8yjiIfCc/JZdBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8197b7efeb09627dedabae4618c6e175b62ca97b2c5c2a544023f13c587e5718","last_reissued_at":"2026-05-17T23:51:10.227920Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:10.227920Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.06648","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:51:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cupPK5PJmN/Kt7uItxf5qtm7vvKBODf3dzi1Ih45z66w/EpETy0DrBhWYwbK9pWd+Wq/PNKrrZxHkeEt1vWmAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T23:07:45.915690Z"},"content_sha256":"5dd3360c29df7855c29425e333d1b2eff089444600d81bb24380506c76b6074f","schema_version":"1.0","event_id":"sha256:5dd3360c29df7855c29425e333d1b2eff089444600d81bb24380506c76b6074f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:QGL3P37LBFRH33NLVZDBRRXBOW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On Energy Efficiency and Performance Evaluation of SBC based Clusters: A Hadoop case study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.DC","authors_text":"Anis Koubaa, Basit Qureshi","submitted_at":"2019-01-31T08:32:25Z","abstract_excerpt":"Energy efficiency in a data center is a challenge and has garnered researchers interest. In this paper we address the energy efficiency issue of a small scale data center by utilizing Single Board Computer (SBC) based clusters. A compact design layout is presented to build two clusters using 20 nodes each. Extensive testing was carried out to analyze the performance of these clusters using popular performance benchmarks for task execution time, memory/storage utilization, network throughput and energy consumption. Further, we investigate the cost of operating SBC based clusters by correlating "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.06648","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:51:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Sd/ERsu8iIAgk3yQoHiI7RhlUrBnbRIUpTdxcYT9d1Ue+0mPQ3qF69e9fc030VOSd4kvIfj12j5n9RFAJb41DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T23:07:45.916356Z"},"content_sha256":"69ebeb401b50612e11408f615627a0107ad664019370c212b6246636880ca3e7","schema_version":"1.0","event_id":"sha256:69ebeb401b50612e11408f615627a0107ad664019370c212b6246636880ca3e7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QGL3P37LBFRH33NLVZDBRRXBOW/bundle.json","state_url":"https://pith.science/pith/QGL3P37LBFRH33NLVZDBRRXBOW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QGL3P37LBFRH33NLVZDBRRXBOW/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-27T23:07:45Z","links":{"resolver":"https://pith.science/pith/QGL3P37LBFRH33NLVZDBRRXBOW","bundle":"https://pith.science/pith/QGL3P37LBFRH33NLVZDBRRXBOW/bundle.json","state":"https://pith.science/pith/QGL3P37LBFRH33NLVZDBRRXBOW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QGL3P37LBFRH33NLVZDBRRXBOW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:QGL3P37LBFRH33NLVZDBRRXBOW","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"c5a001d21945c238813248d8323ab8b52996fdce530c1b09d394f274e30b0ac8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2019-01-31T08:32:25Z","title_canon_sha256":"5805ed5b5ed1df74f6427f45c49ea8e97ea15d83fd34e338d904ffe1e95283d7"},"schema_version":"1.0","source":{"id":"1903.06648","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.06648","created_at":"2026-05-17T23:51:10Z"},{"alias_kind":"arxiv_version","alias_value":"1903.06648v1","created_at":"2026-05-17T23:51:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.06648","created_at":"2026-05-17T23:51:10Z"},{"alias_kind":"pith_short_12","alias_value":"QGL3P37LBFRH","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"QGL3P37LBFRH33NL","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"QGL3P37L","created_at":"2026-05-18T12:33:27Z"}],"graph_snapshots":[{"event_id":"sha256:69ebeb401b50612e11408f615627a0107ad664019370c212b6246636880ca3e7","target":"graph","created_at":"2026-05-17T23:51:10Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Energy efficiency in a data center is a challenge and has garnered researchers interest. In this paper we address the energy efficiency issue of a small scale data center by utilizing Single Board Computer (SBC) based clusters. A compact design layout is presented to build two clusters using 20 nodes each. Extensive testing was carried out to analyze the performance of these clusters using popular performance benchmarks for task execution time, memory/storage utilization, network throughput and energy consumption. Further, we investigate the cost of operating SBC based clusters by correlating ","authors_text":"Anis Koubaa, Basit Qureshi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2019-01-31T08:32:25Z","title":"On Energy Efficiency and Performance Evaluation of SBC based Clusters: A Hadoop case study"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.06648","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:5dd3360c29df7855c29425e333d1b2eff089444600d81bb24380506c76b6074f","target":"record","created_at":"2026-05-17T23:51:10Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"c5a001d21945c238813248d8323ab8b52996fdce530c1b09d394f274e30b0ac8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2019-01-31T08:32:25Z","title_canon_sha256":"5805ed5b5ed1df74f6427f45c49ea8e97ea15d83fd34e338d904ffe1e95283d7"},"schema_version":"1.0","source":{"id":"1903.06648","kind":"arxiv","version":1}},"canonical_sha256":"8197b7efeb09627dedabae4618c6e175b62ca97b2c5c2a544023f13c587e5718","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8197b7efeb09627dedabae4618c6e175b62ca97b2c5c2a544023f13c587e5718","first_computed_at":"2026-05-17T23:51:10.227920Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:10.227920Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SgpkKAuLDcws2m/dMrQeJzE5+xpa3iaMIEk1TESZiQ6LgOXDVYjYY9718aYixGfnsFuWy3N/8yjiIfCc/JZdBw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:10.228384Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.06648","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5dd3360c29df7855c29425e333d1b2eff089444600d81bb24380506c76b6074f","sha256:69ebeb401b50612e11408f615627a0107ad664019370c212b6246636880ca3e7"],"state_sha256":"82bbdd428a7103864d1447fd80e487b4941578e11bcb58f70f51d85f5e79b922"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uPqAcndmIW2FORAshLiGL/sA3pCPjjOIGEYYnbzRMkMZlBphVIfk3PJjGGA+Av+0IAoZUmr+WaTsAM4BH2FIBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T23:07:45.919292Z","bundle_sha256":"db64c74dd25441279637be12bb7c6245da4d3fe51bd28890d674141dcd41afbc"}}