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EC decode: read shards with the encode-time block layout (#10385)

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* erasure_coding: WriteDatFile takes the encode-time dat size for the shard block layout

* volume server: derive EC decode layout from the encode-time dat size, not the live extent

* erasure_coding: test decode after tail deletions shrink the live extent below a large-block row

* seaweed-volume: write_dat_file_from_shards takes the encode-time dat size for the shard block layout

* seaweed-volume: derive EC decode layout from the encode-time dat size, not the live extent

* seaweed-volume: test decode after tail deletions shrink the live extent below a large-block row

* erasure_coding: reject decoding with no data shards

* worker: record the encode-time dat size in the .vif

* erasure_coding: fall back to the shard-derived layout only when the encode-time dat size is missing

* erasure_coding: reject an ambiguous shard-derived block layout

* seaweed-volume: fall back to the shard-derived layout only when the encode-time dat size is missing

* seaweed-volume: reject an ambiguous shard-derived block layout
This commit is contained in:
Chris Lu authored and GitHub committed 2026-07-21 08:59:14 -07:00
1 parent cdb60069a6
commit 5a54beac80
9 files changed
+516 -31
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weed/storage/erasure_coding/ec_decoder_test.go
+1 -1
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@@ -217,7 +217,7 @@ func TestDecodeAtomicPublish(t *testing.T) {
// final .dat nor a partial .dat.tmp behind.
datBase := filepath.Join(dir, "bar_2")
missingShards := []string{filepath.Join(dir, "does_not_exist.ec00")}
if err := erasure_coding.WriteDatFile(datBase, 100, missingShards); err == nil {
if err := erasure_coding.WriteDatFile(datBase, 100, 100, missingShards); err == nil {
t.Fatalf("expected WriteDatFile to fail on missing shard")
}
if _, err := os.Stat(datBase + ".dat"); !os.IsNotExist(err) {