{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:FL3XED3MHCSF4OEHG2UFG4OR7Q","short_pith_number":"pith:FL3XED3M","schema_version":"1.0","canonical_sha256":"2af7720f6c38a45e388736a85371d1fc168e3e11a11678658d32d23ea01a8a9a","source":{"kind":"arxiv","id":"1707.08514","version":1},"attestation_state":"computed","paper":{"title":"Analyzing IO Amplification in Linux File Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.OS","authors_text":"Jayashree Mohan, Rohan Kadekodi, Vijay Chidambaram","submitted_at":"2017-07-26T16:02:29Z","abstract_excerpt":"We present the first systematic analysis of read, write, and space amplification in Linux file systems. While many researchers are tackling write amplification in key-value stores, IO amplification in file systems has been largely unexplored. We analyze data and metadata operations on five widely-used Linux file systems: ext2, ext4, XFS, btrfs, and F2FS. We find that data operations result in significant write amplification (2-32X) and that metadata operations have a large IO cost. For example, a single rename requires 648 KB write IO in btrfs. We also find that small random reads result in re"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1707.08514","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.OS","submitted_at":"2017-07-26T16:02:29Z","cross_cats_sorted":[],"title_canon_sha256":"1a56bce3ffda0bbd1640b84797b5941c361c039a69f6a353169ed7533b0541d1","abstract_canon_sha256":"ecf3f5b53f49fd0f242412f9e4b958122190847bc9431dd8de85c755038ec580"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:39:24.012706Z","signature_b64":"3fa8Tx7gR8sKQiRasD83yifwwL8+RhK5QJvF6qw9sUsVxvxs2rq68cLaMvDmpr3cPSyquxFKU10djZJPGN2fCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2af7720f6c38a45e388736a85371d1fc168e3e11a11678658d32d23ea01a8a9a","last_reissued_at":"2026-05-18T00:39:24.012148Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:39:24.012148Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Analyzing IO Amplification in Linux File Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.OS","authors_text":"Jayashree Mohan, Rohan Kadekodi, Vijay Chidambaram","submitted_at":"2017-07-26T16:02:29Z","abstract_excerpt":"We present the first systematic analysis of read, write, and space amplification in Linux file systems. While many researchers are tackling write amplification in key-value stores, IO amplification in file systems has been largely unexplored. We analyze data and metadata operations on five widely-used Linux file systems: ext2, ext4, XFS, btrfs, and F2FS. We find that data operations result in significant write amplification (2-32X) and that metadata operations have a large IO cost. For example, a single rename requires 648 KB write IO in btrfs. We also find that small random reads result in re"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.08514","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1707.08514","created_at":"2026-05-18T00:39:24.012237+00:00"},{"alias_kind":"arxiv_version","alias_value":"1707.08514v1","created_at":"2026-05-18T00:39:24.012237+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.08514","created_at":"2026-05-18T00:39:24.012237+00:00"},{"alias_kind":"pith_short_12","alias_value":"FL3XED3MHCSF","created_at":"2026-05-18T12:31:15.632608+00:00"},{"alias_kind":"pith_short_16","alias_value":"FL3XED3MHCSF4OEH","created_at":"2026-05-18T12:31:15.632608+00:00"},{"alias_kind":"pith_short_8","alias_value":"FL3XED3M","created_at":"2026-05-18T12:31:15.632608+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/FL3XED3MHCSF4OEHG2UFG4OR7Q","json":"https://pith.science/pith/FL3XED3MHCSF4OEHG2UFG4OR7Q.json","graph_json":"https://pith.science/api/pith-number/FL3XED3MHCSF4OEHG2UFG4OR7Q/graph.json","events_json":"https://pith.science/api/pith-number/FL3XED3MHCSF4OEHG2UFG4OR7Q/events.json","paper":"https://pith.science/paper/FL3XED3M"},"agent_actions":{"view_html":"https://pith.science/pith/FL3XED3MHCSF4OEHG2UFG4OR7Q","download_json":"https://pith.science/pith/FL3XED3MHCSF4OEHG2UFG4OR7Q.json","view_paper":"https://pith.science/paper/FL3XED3M","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1707.08514&json=true","fetch_graph":"https://pith.science/api/pith-number/FL3XED3MHCSF4OEHG2UFG4OR7Q/graph.json","fetch_events":"https://pith.science/api/pith-number/FL3XED3MHCSF4OEHG2UFG4OR7Q/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FL3XED3MHCSF4OEHG2UFG4OR7Q/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FL3XED3MHCSF4OEHG2UFG4OR7Q/action/storage_attestation","attest_author":"https://pith.science/pith/FL3XED3MHCSF4OEHG2UFG4OR7Q/action/author_attestation","sign_citation":"https://pith.science/pith/FL3XED3MHCSF4OEHG2UFG4OR7Q/action/citation_signature","submit_replication":"https://pith.science/pith/FL3XED3MHCSF4OEHG2UFG4OR7Q/action/replication_record"}},"created_at":"2026-05-18T00:39:24.012237+00:00","updated_at":"2026-05-18T00:39:24.012237+00:00"}