{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:2MK4Q2467XGQB3RBBY45IJONGT","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":"1ee5a67bc1db5265c5f7840a5be6b2b8efc65fb4b66b64aa60ea660ea200926a","cross_cats_sorted":["cs.PF","cs.SE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2015-03-31T14:29:13Z","title_canon_sha256":"d47c084e2919681446854b2a50f012e34a512e765dd88896be25fc5549f0b3de"},"schema_version":"1.0","source":{"id":"1503.09062","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.09062","created_at":"2026-05-18T02:19:43Z"},{"alias_kind":"arxiv_version","alias_value":"1503.09062v2","created_at":"2026-05-18T02:19:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.09062","created_at":"2026-05-18T02:19:43Z"},{"alias_kind":"pith_short_12","alias_value":"2MK4Q2467XGQ","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_16","alias_value":"2MK4Q2467XGQB3RB","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_8","alias_value":"2MK4Q246","created_at":"2026-05-18T12:29:02Z"}],"graph_snapshots":[{"event_id":"sha256:aa21a24599a5fa1d8fe81391ded788a4e869acc2c5abb20de49f4757a82f6e39","target":"graph","created_at":"2026-05-18T02:19:43Z","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":"We tackle the problem of predicting the performance of MapReduce applications, designing accurate progress indicators that keep programmers informed on the percentage of completed computation time during the execution of a job. Through extensive experiments, we show that state-of-the-art progress indicators (including the one provided by Hadoop) can be seriously harmed by data skewness, load unbalancing, and straggling tasks. This is mainly due to their implicit assumption that the running time depends linearly on the input size. We thus design a novel profile-guided progress indicator, called","authors_text":"Emilio Coppa, Irene Finocchi","cross_cats":["cs.PF","cs.SE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2015-03-31T14:29:13Z","title":"On data skewness, stragglers, and MapReduce progress indicators"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.09062","kind":"arxiv","version":2},"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:fff0bc1a05783d62720bb0b5acbe8e3ac323d61831be1add4e8de08678cc7d05","target":"record","created_at":"2026-05-18T02:19:43Z","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":"1ee5a67bc1db5265c5f7840a5be6b2b8efc65fb4b66b64aa60ea660ea200926a","cross_cats_sorted":["cs.PF","cs.SE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2015-03-31T14:29:13Z","title_canon_sha256":"d47c084e2919681446854b2a50f012e34a512e765dd88896be25fc5549f0b3de"},"schema_version":"1.0","source":{"id":"1503.09062","kind":"arxiv","version":2}},"canonical_sha256":"d315c86b9efdcd00ee210e39d425cd34c3037757703fc0256a294c4617e274d1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d315c86b9efdcd00ee210e39d425cd34c3037757703fc0256a294c4617e274d1","first_computed_at":"2026-05-18T02:19:43.494225Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:19:43.494225Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LPQD8M16oVDgiRpI7cuKVu8Yp9fi0rOigZWriKPO1Gm1DOyI5HFHT7h4KxqMxgyzOKSB4VcD6lk85YcK5AIZBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:19:43.494650Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.09062","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fff0bc1a05783d62720bb0b5acbe8e3ac323d61831be1add4e8de08678cc7d05","sha256:aa21a24599a5fa1d8fe81391ded788a4e869acc2c5abb20de49f4757a82f6e39"],"state_sha256":"63f157f64c0ad22806ee6f2e14f935e99488e28085f4b49bfbefda344b056458"}