3f0ec9fa9f
This commit refactors out the complexity of downloading ordered WAL files in parallel to a type called `WALDownloader`. This makes it easier to test the restore separately from the download.
37 lines
788 B
Plaintext
37 lines
788 B
Plaintext
To reproduce this testdata, run sqlite3 and execute:
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PRAGMA journal_mode = WAL;
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CREATE TABLE t (x);
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INSERT INTO t (x) VALUES (1);
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INSERT INTO t (x) VALUES (2);
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sl3 split -o generations/0000000000000000/wal/00000000 db-wal
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cp db generations/0000000000000000/snapshots/00000000.snapshot
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lz4 -c --rm generations/0000000000000000/snapshots/00000000.snapshot
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Then execute:
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PRAGMA wal_checkpoint(TRUNCATE);
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INSERT INTO t (x) VALUES (3);
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sl3 split -o generations/0000000000000000/wal/00000001 db-wal
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Then execute:
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PRAGMA wal_checkpoint(TRUNCATE);
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INSERT INTO t (x) VALUES (4);
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INSERT INTO t (x) VALUES (5);
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sl3 split -o generations/0000000000000000/wal/00000002 db-wal
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Finally, obtain the final snapshot:
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PRAGMA wal_checkpoint(TRUNCATE);
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cp db 00000002.db
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rm db*
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