{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:MY5AA7X334AYACPY3G6MYTT45Q","short_pith_number":"pith:MY5AA7X3","canonical_record":{"source":{"id":"2506.08923","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DC","submitted_at":"2025-06-10T15:47:31Z","cross_cats_sorted":[],"title_canon_sha256":"b9a4b07963bfa3396c2c97aae86a8523be4ac5afe57ba62d366a0c81aa5208dd","abstract_canon_sha256":"34b714b555b0905789d046021d74557032b080088d83a87213d46a6fc5e4b874"},"schema_version":"1.0"},"canonical_sha256":"663a007efbdf018009f8d9bccc4e7cec1f9f28e11489db8b2433e52a6738d3f3","source":{"kind":"arxiv","id":"2506.08923","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.08923","created_at":"2026-07-05T11:19:15Z"},{"alias_kind":"arxiv_version","alias_value":"2506.08923v1","created_at":"2026-07-05T11:19:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.08923","created_at":"2026-07-05T11:19:15Z"},{"alias_kind":"pith_short_12","alias_value":"MY5AA7X334AY","created_at":"2026-07-05T11:19:15Z"},{"alias_kind":"pith_short_16","alias_value":"MY5AA7X334AYACPY","created_at":"2026-07-05T11:19:15Z"},{"alias_kind":"pith_short_8","alias_value":"MY5AA7X3","created_at":"2026-07-05T11:19:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:MY5AA7X334AYACPY3G6MYTT45Q","target":"record","payload":{"canonical_record":{"source":{"id":"2506.08923","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DC","submitted_at":"2025-06-10T15:47:31Z","cross_cats_sorted":[],"title_canon_sha256":"b9a4b07963bfa3396c2c97aae86a8523be4ac5afe57ba62d366a0c81aa5208dd","abstract_canon_sha256":"34b714b555b0905789d046021d74557032b080088d83a87213d46a6fc5e4b874"},"schema_version":"1.0"},"canonical_sha256":"663a007efbdf018009f8d9bccc4e7cec1f9f28e11489db8b2433e52a6738d3f3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:19:15.122468Z","signature_b64":"g5ZvD8J4x5hStixcnlD7dliaCxgzetLOeLSPVAUZH95i8wqS/AUTe0JSeiqNGSk+AtQB8vPPqlNNqLZcC6/UAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"663a007efbdf018009f8d9bccc4e7cec1f9f28e11489db8b2433e52a6738d3f3","last_reissued_at":"2026-07-05T11:19:15.121993Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:19:15.121993Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2506.08923","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":"2026-07-05T11:19:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vMzxdiFkudaV5xPcWmKxuXzi/mFYv2B82mngIlyByWg9i0EXIfGHUScIr8LncOXybKnqlYhU2gm59pasyIeRBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T11:51:14.828073Z"},"content_sha256":"803164764d81a6b683a178faf775968d43eaedeb62870a4defdf0dd801f10e54","schema_version":"1.0","event_id":"sha256:803164764d81a6b683a178faf775968d43eaedeb62870a4defdf0dd801f10e54"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:MY5AA7X334AYACPY3G6MYTT45Q","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Mycelium: A Transformation-Embedded LSM-Tree","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.DC","authors_text":"Aldrin Montana, Holly Casaletto, Jeff LeFevre, Peter Alvaro","submitted_at":"2025-06-10T15:47:31Z","abstract_excerpt":"Compaction is a necessary, but often costly background process in write-optimized data structures like LSM-trees that reorganizes incoming data that is sequentially appended to logs. In this paper, we introduce Transformation-Embedded LSM-trees (TE-LSM), a novel approach that transparently embeds a variety of data transformations into the compaction process. While many others have sought to reduce the high cost of compaction, TE-LSMs leverage the opportunity to embed other useful work to amortize IO costs and amplification. We illustrate the use of a TE-LSM in Mycelium, our prototype built on "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.08923","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2506.08923/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T11:19:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sltu5822WVXr2UdV+0ABURz9+raI200YOYmF9NrTYBhn9VoZliHcGCmuT1eBLDWHApQwgFQkInclKrl5mu6XCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T11:51:14.829209Z"},"content_sha256":"283cce6942ff6f01001ca80d6391889154a27b8194138eb35604c81ce551ba91","schema_version":"1.0","event_id":"sha256:283cce6942ff6f01001ca80d6391889154a27b8194138eb35604c81ce551ba91"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MY5AA7X334AYACPY3G6MYTT45Q/bundle.json","state_url":"https://pith.science/pith/MY5AA7X334AYACPY3G6MYTT45Q/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MY5AA7X334AYACPY3G6MYTT45Q/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":"2026-08-08T11:51:14Z","links":{"resolver":"https://pith.science/pith/MY5AA7X334AYACPY3G6MYTT45Q","bundle":"https://pith.science/pith/MY5AA7X334AYACPY3G6MYTT45Q/bundle.json","state":"https://pith.science/pith/MY5AA7X334AYACPY3G6MYTT45Q/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MY5AA7X334AYACPY3G6MYTT45Q/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:MY5AA7X334AYACPY3G6MYTT45Q","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":"34b714b555b0905789d046021d74557032b080088d83a87213d46a6fc5e4b874","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DC","submitted_at":"2025-06-10T15:47:31Z","title_canon_sha256":"b9a4b07963bfa3396c2c97aae86a8523be4ac5afe57ba62d366a0c81aa5208dd"},"schema_version":"1.0","source":{"id":"2506.08923","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.08923","created_at":"2026-07-05T11:19:15Z"},{"alias_kind":"arxiv_version","alias_value":"2506.08923v1","created_at":"2026-07-05T11:19:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.08923","created_at":"2026-07-05T11:19:15Z"},{"alias_kind":"pith_short_12","alias_value":"MY5AA7X334AY","created_at":"2026-07-05T11:19:15Z"},{"alias_kind":"pith_short_16","alias_value":"MY5AA7X334AYACPY","created_at":"2026-07-05T11:19:15Z"},{"alias_kind":"pith_short_8","alias_value":"MY5AA7X3","created_at":"2026-07-05T11:19:15Z"}],"graph_snapshots":[{"event_id":"sha256:283cce6942ff6f01001ca80d6391889154a27b8194138eb35604c81ce551ba91","target":"graph","created_at":"2026-07-05T11:19:15Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2506.08923/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Compaction is a necessary, but often costly background process in write-optimized data structures like LSM-trees that reorganizes incoming data that is sequentially appended to logs. In this paper, we introduce Transformation-Embedded LSM-trees (TE-LSM), a novel approach that transparently embeds a variety of data transformations into the compaction process. While many others have sought to reduce the high cost of compaction, TE-LSMs leverage the opportunity to embed other useful work to amortize IO costs and amplification. We illustrate the use of a TE-LSM in Mycelium, our prototype built on ","authors_text":"Aldrin Montana, Holly Casaletto, Jeff LeFevre, Peter Alvaro","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DC","submitted_at":"2025-06-10T15:47:31Z","title":"Mycelium: A Transformation-Embedded LSM-Tree"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.08923","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":"sha256:803164764d81a6b683a178faf775968d43eaedeb62870a4defdf0dd801f10e54","target":"record","created_at":"2026-07-05T11:19:15Z","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":"34b714b555b0905789d046021d74557032b080088d83a87213d46a6fc5e4b874","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DC","submitted_at":"2025-06-10T15:47:31Z","title_canon_sha256":"b9a4b07963bfa3396c2c97aae86a8523be4ac5afe57ba62d366a0c81aa5208dd"},"schema_version":"1.0","source":{"id":"2506.08923","kind":"arxiv","version":1}},"canonical_sha256":"663a007efbdf018009f8d9bccc4e7cec1f9f28e11489db8b2433e52a6738d3f3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"663a007efbdf018009f8d9bccc4e7cec1f9f28e11489db8b2433e52a6738d3f3","first_computed_at":"2026-07-05T11:19:15.121993Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:19:15.121993Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"g5ZvD8J4x5hStixcnlD7dliaCxgzetLOeLSPVAUZH95i8wqS/AUTe0JSeiqNGSk+AtQB8vPPqlNNqLZcC6/UAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:19:15.122468Z","signed_message":"canonical_sha256_bytes"},"source_id":"2506.08923","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:803164764d81a6b683a178faf775968d43eaedeb62870a4defdf0dd801f10e54","sha256:283cce6942ff6f01001ca80d6391889154a27b8194138eb35604c81ce551ba91"],"state_sha256":"ef567a711cb8598f1036ac21b5fd785de658c36d7ea8450741eb1ffe239f823b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AH95UilCsB6uSBEIAuBhzE65jxvHK0w8W4UkME62+GHIwpvS97+Ffp77l+4PO6r3XCkK2qYbpKTk8+WF5KOTAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T11:51:14.834735Z","bundle_sha256":"852d84161f7a5911f2730c3ff1ffe8cd865e3ab900f3f85c1af9f2bb0ab05ed3"}}