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bisync: high-level retries if --resilient

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Before this change, bisync had no ability to retry in the event of sync errors.
After this change, bisync will retry if --resilient is passed, but only in one
direction at a time. We can safely retry in one direction because the source is
still intact, even if the dest was left in a messy state. If the first
direction still fails after our final retry, we abort and do NOT continue in
the other direction, to prevent the messy dest from polluting the source. If
the first direction succeeds, we do then allow retries in the other direction.

The number of retries is controllable by --retries (default 3)

bisync: high-level retries if --resilient

Before this change, bisync had no ability to retry in the event of sync errors.
After this change, bisync will retry if --resilient is passed, but only in one
direction at a time. We can safely retry in one direction because the source is
still intact, even if the dest was left in a messy state. If the first
direction still fails after our final retry, we abort and do NOT continue in
the other direction, to prevent the messy dest from polluting the source. If
the first direction succeeds, we do then allow retries in the other direction.

The number of retries is controllable by --retries (default 3)
This commit is contained in:
nielash
2023-11-10 22:56:28 -05:00
parent 98f539de8f
commit 44637dcd7f
3 changed files with 22 additions and 0 deletions
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8
cmd/bisync/deltas.go
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@@ -427,6 +427,10 @@ func (b *bisyncRun) applyDeltas(ctx context.Context, ds1, ds2 *deltaSet) (change
changes1 = true
b.indent("Path2", "Path1", "Do queued copies to")
results2to1, err = b.fastCopy(ctx, b.fs2, b.fs1, copy2to1, "copy2to1")
// retries, if any
results2to1, err = b.retryFastCopy(ctx, b.fs2, b.fs1, copy2to1, "copy2to1", results2to1, err)
if err != nil {
return
}
@@ -439,6 +443,10 @@ func (b *bisyncRun) applyDeltas(ctx context.Context, ds1, ds2 *deltaSet) (change
changes2 = true
b.indent("Path1", "Path2", "Do queued copies to")
results1to2, err = b.fastCopy(ctx, b.fs1, b.fs2, copy1to2, "copy1to2")
// retries, if any
results1to2, err = b.retryFastCopy(ctx, b.fs1, b.fs2, copy1to2, "copy1to2", results1to2, err)
if err != nil {
return
}