A Windows service writes to SQLite in WAL mode while a nightly backup copies only the main database file. Find official SQLite sources and produce a corrected backup/restore checklist. Explain the WAL dependency, a documented live-backup alternative, and how we should validate a restored copy. Keep operational recommendations separate from what the source guarantees.

Archived dispatch

Lowconfidence— no source was read for this question

10/4/2026, 11:47:22 PM · llm:deepseek:deepseek-v4-flash + heuristic (fallback from llm:cloudflare:@cf/meta/llama-3.3-70b-instruct-fp8-fast) (fallback from llm:mimo:mimo-v2.5) on 1 step

§ IIThe reading0 cited

Lowconfidence— no source was read for this questiondeep researchpreview plan 5/5 claimsportfolio 4/14

No supported answer: no source passed the relevance and evidence checks within this run's limits. Web search: 4 queries attempted, 3 succeeded, 1 unavailable. Selected public originals could not supply usable text: How to Back Up a WAL-Mode SQLite Database Without Losing Data (html-extraction-unavailable); Copying your SQLite .db file isn't a valid backup when WAL mode is enabled : r/webdev (html-extraction-unavailable); SQLite WAL Backups: Verify the Committed Rows (html-extraction-unavailable). Narrow the question to one concrete decision, supply a relevant original source URL, and inspect the recorded SKIP/read failures. A larger source budget does not resolve a free-source attention gate or extraction limit. Metadata previews are not read evidence. This does not establish that no relevant evidence exists.

- “How to Back Up a WAL-Mode SQLite Database Without Losing Data”: HTML text extraction failed. Look for a publisher-provided text/PDF edition of the same document and version; a preview cannot replace the original content. - “Copying your SQLite .db file isn't a valid backup when WAL mode is enabled : r/webdev”: HTML text extraction failed. Look for a publisher-provided text/PDF edition of the same document and version; a preview cannot replace the original content. - “SQLite WAL Backups: Verify the Committed Rows”: HTML text extraction failed. Look for a publisher-provided text/PDF edition of the same document and version; a preview cannot replace the original content. - “sqlite Fastest way to backup a "live" database”: HTML text extraction failed. Look for a publisher-provided text/PDF edition of the same document and version; a preview cannot replace the original content.

Evidence ledger — recorded source excerpts

Research targets are unverified topics. Coverage is an estimate of excerpt support, not proof of entailment, factual truth or a complete answer.

Requested topic (unverified): “What does official SQLite documentation state about the dependency between the main database file and the WAL file when a database is in WAL mode?”
0% estimated
No qualifying excerpt recorded
Requested topic (unverified): “What does official SQLite documentation state about whether copying only the main database file while a WAL file exists produces a valid backup?”
0% estimated
No qualifying excerpt recorded
Requested topic (unverified): “What documented live-backup alternative does official SQLite provide for backing up a database that is in use or in WAL mode?”
0% estimated
No qualifying excerpt recorded
Requested topic (unverified): “What does official SQLite documentation state about how to validate a restored copy of a database, including any integrity checks it documents?”
0% estimated
No qualifying excerpt recorded
Requested topic (unverified): “What does official SQLite documentation guarantee about backup correctness versus what remains an operational recommendation for a nightly backup of a WAL-mode database used by a Windows service?”
0% estimated
No qualifying excerpt recorded

No inspectable non-demo excerpts are recorded for source inspection.

Research evidence matrix

Compare unverified research targets with cited sources and inspect recorded excerpts. An empty cell means no inspectable excerpt was recorded; it does not establish whether a claim is true, false, or disputed. Coverage and agent confidence do not prove entailment, measured accuracy or complete synthesis.

Research target by cited source evidence matrix
Research target (unverified)	Inspection status
What does official SQLite documentation state about the dependency between the main database file and the WAL file when a database is in WAL mode?	No inspectable excerpt recorded
What does official SQLite documentation state about whether copying only the main database file while a WAL file exists produces a valid backup?	No inspectable excerpt recorded
What documented live-backup alternative does official SQLite provide for backing up a database that is in use or in WAL mode?	No inspectable excerpt recorded
What does official SQLite documentation state about how to validate a restored copy of a database, including any integrity checks it documents?	No inspectable excerpt recorded
What does official SQLite documentation guarantee about backup correctness versus what remains an operational recommendation for a nightly backup of a WAL-mode database used by a Windows service?	No inspectable excerpt recorded

Helpful?

Spent$0

To creators—

Decisions0 bought · 4 cached · 14 skipped

llm:deepseek:deepseek-v4-flash + heuristic (fallback from llm:cloudflare:@cf/meta/llama-3.3-70b-instruct-fp8-fast) (fallback from llm:mimo:mimo-v2.5) on 1 steplive on Arc mainnet

Decision log · 34 steps

§ IThe decision$0 settled / $0.03

Decompose

Breaking down: "A Windows service writes to SQLite in WAL mode while a nightly backup copies only the main database file. Find official SQLite sources and produce a corrected backup/restore checklist. Explain the WAL dependency, a documented live-backup alternative, and how we should validate a restored copy. Keep operational recommendations separate from what the source guarantees."

Decompose

Identified 5 research target(s) to investigate; these are not established facts

Decompose

Deep mode: up to 4 paid/cached/public reads plus one bounded gap-expansion pass when needed.

Discover

Web search: 4/4 planned queries attempted, 3 succeeded, 18 public page previews, 1 unavailable queries. Snippets are discovery only. Public reads spend no USDC; model and service operating costs remain separate.

Discover

Discovered 0 verified creator source(s) and 18 free public reference(s)

Pre-check

Claim-aware portfolio (exhaustive; bounded selection, not a claim of global optimality) selected 4/14 positive proposal(s): 4 free/cache selections + 0 paid fresh selections, predicting 5/5 claim(s) above the evidence floor with $0.000000/$0.015000 fetch USDC reserved.

Pre-check

Free-preview pre-check maps an actionable source to every sub-claim (5/5); paid reading may proceed within the budget.

DecideCACHE

How to Back Up a WAL-Mode SQLite Database Without Losing Data$0 · EV 32%

Strong topical match on sqlite, wal, mode, while, backup, addresses sub-claim 1 & 2 & 3 & 4 & 5; worth the 0 USDC toll. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — selected for the claim-aware evidence portfolio (targets claims 1, 2, 3, 4, 5; 0 fetch USDC, 1 attention slot).

DecideCACHE

Copying your SQLite .db file isn't a valid backup when WAL mode is enabled : r/webdev$0 · EV 26%

Strong topical match on sqlite, wal, mode, backup, only, addresses sub-claim 1 & 2 & 3 & 4 & 5; worth the 0 USDC toll. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — selected for the claim-aware evidence portfolio (targets claims 1, 2, 3, 4, 5; 0 fetch USDC, 1 attention slot).

DecideCACHE

SQLite WAL Backups: Verify the Committed Rows$0 · EV 23%

Strong topical match on sqlite, wal, mode, while, only, addresses sub-claim 1 & 2 & 3 & 4 & 5; worth the 0 USDC toll. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — selected for the claim-aware evidence portfolio (targets claims 1, 2, 3, 4, 5; 0 fetch USDC, 1 attention slot).

DecideCACHE

[sqlite] Fastest way to backup a "live" database$0 · EV 19%

Strong topical match on writes, sqlite, wal, mode, backup, addresses sub-claim 1 & 2 & 3 & 4 & 5; worth the 0 USDC toll. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — selected for the claim-aware evidence portfolio (targets claims 1, 2, 3, 4, 5; 0 fetch USDC, 1 attention slot).

DecideSKIP

SQLite User Forum: Hot backup database in WAL mode by coping$0 · EV 19%

Strong topical match on sqlite, wal, mode, backup, only, addresses sub-claim 1 & 2 & 3 & 4 & 5; worth the 0 USDC toll. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 4-source attention and $0.015000 fetch-budget caps, so this proposal stays unspent.

DecideSKIP

SQLite User Forum: Hot backup database in WAL mode by coping$0 · EV 19%

Strong topical match on sqlite, wal, mode, backup, only, addresses sub-claim 1 & 2 & 3 & 4 & 5; worth the 0 USDC toll. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 4-source attention and $0.015000 fetch-budget caps, so this proposal stays unspent.

DecideSKIP

[sqlite] Online/Hot backup of WAL journalling mode database$0 · EV 16%

Strong topical match on writes, sqlite, wal, mode, backup, addresses sub-claim 1 & 2 & 3 & 4 & 5; worth the 0 USDC toll. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 4-source attention and $0.015000 fetch-budget caps, so this proposal stays unspent.

DecideSKIP

SQLite .backup and VACUUM INTO While the App Runs | NetBay Hosting$0 · EV 14%

Strong topical match on sqlite, wal, mode, while, backup, addresses sub-claim 1 & 2 & 3 & 4 & 5; worth the 0 USDC toll. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 4-source attention and $0.015000 fetch-budget caps, so this proposal stays unspent.

DecideSKIP

Backup strategies for SQLite in production – Oldmoe's blog$0 · EV 12%

Strong topical match on sqlite, wal, backup, main, database, addresses sub-claim 1 & 2 & 3 & 4 & 5; worth the 0 USDC toll. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 4-source attention and $0.015000 fetch-budget caps, so this proposal stays unspent.

DecideSKIP

How to safely back up or copy a live SQLite database$0 · EV 19%

Strong topical match on sqlite, wal, while, copies, only, addresses sub-claim 1 & 2 & 3 & 4 & 5; worth the 0 USDC toll. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 4-source attention and $0.015000 fetch-budget caps, so this proposal stays unspent.

DecideSKIP

Backup of SQLite includes content of -wal? · dani-garcia/vaultwarden · Discussion #2369 · GitHub$0 · EV 12%

Strong topical match on sqlite, wal, backup, copies, database, addresses sub-claim 1 & 2 & 3 & 4 & 5; worth the 0 USDC toll. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 4-source attention and $0.015000 fetch-budget caps, so this proposal stays unspent.

DecideSKIP

SQLite Corruption with fs.copyFile() in WAL Mode - Scott Spence$0 · EV 19%

Strong topical match on sqlite, wal, mode, while, backup, addresses sub-claim 1 & 2 & 3 & 4 & 5; worth the 0 USDC toll. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 4-source attention and $0.015000 fetch-budget caps, so this proposal stays unspent.

DecideSKIP

How to prevent write transactions while copying the Sqlite3 ...$0 · EV 14%

Strong topical match on wal, mode, while, backup, main, addresses sub-claim 1 & 2 & 3 & 5; worth the 0 USDC toll. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 4-source attention and $0.015000 fetch-budget caps, so this proposal stays unspent.

DecideSKIP

Archiving SQLite DB with WAL mode$0 · EV 7%

Weak match (only sqlite, wal, mode, database); not worth 0 USDC. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

DecideSKIP

SQLite Data Security: Backup and Protection Strategies$0 · EV 11%

Weak match (only sqlite, wal, mode, backup, keep); not worth 0 USDC. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

DecideSKIP

SQLite for Beginners: Database Backups$0 · EV 5%

Weak match (only sqlite, backup, database); not worth 0 USDC. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

DecideSKIP

How to backup sqlite database?$0 · EV 12%

Strong topical match on sqlite, backup, database, file, copy, addresses sub-claim 1 & 2 & 3 & 4 & 5; worth the 0 USDC toll. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 4-source attention and $0.015000 fetch-budget caps, so this proposal stays unspent.

DecideSKIP

Sqlite 'doesn't do automatic backups'? Is this true?$0 · EV 2%

Weak match (only sqlite); not worth 0 USDC. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

Fetch

READ How to Back Up a WAL-Mode SQLite Database Without Losing Data - selected original public page, 0 USDC; not a cache hit.

Fetch

Public page unavailable (html-extraction-unavailable); no evidence admitted. Continuing research.

Fetch

READ Copying your SQLite .db file isn't a valid backup when WAL mode is enabled : r/webdev - selected original public page, 0 USDC; not a cache hit.

Fetch

Public page unavailable (html-extraction-unavailable); no evidence admitted. Continuing research.

Fetch

READ SQLite WAL Backups: Verify the Committed Rows - selected original public page, 0 USDC; not a cache hit.

Fetch

Public page unavailable (html-extraction-unavailable); no evidence admitted. Continuing research.

Fetch

READ [sqlite] Fastest way to backup a "live" database - selected original public page, 0 USDC; not a cache hit.

Fetch

Public page unavailable (html-extraction-unavailable); no evidence admitted. Continuing research.

Done

Done. Spent $0 across 0 confirmed/simulated payment(s) to creators.

Portable research receipt

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