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Code Issues Releases Wiki Activity

Align snapshot times to the beginning of days when calculating the differences

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This commit is contained in:
Gilbert Chen
2018-09-08 20:31:49 -04:00
parent 674d35e5ca
commit 22a0b222db
1 changed files with 13 additions and 4 deletions
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17
src/duplicacy_snapshotmanager.go
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@@ -170,6 +170,16 @@ func (collection *FossilCollection) IsEmpty() bool {
return len(collection.Fossils) == 0 && len(collection.Temporaries) == 0
}
// Calculates the number of days between two times ignoring the hours, minutes and seconds.
func getDaysBetween(start int64, end int64) int {
startTime := time.Unix(start, 0).In(time.Now().Location())
endTime := time.Unix(end, 0).In(time.Now().Location())
startDate := time.Date(startTime.Year(), startTime.Month(), startTime.Day(), 0, 0, 0, 0, startTime.Location())
endDate := time.Date(endTime.Year(), endTime.Month(), endTime.Day(), 0, 0, 0, 0, endTime.Location())
hours := int(endDate.Sub(startDate).Hours())
return (hours + 1) / 24
}
// SnapshotManager is mainly responsible for downloading, and deleting snapshots.
type SnapshotManager struct {
@@ -1907,7 +1917,7 @@ func (manager *SnapshotManager) PruneSnapshots(selfID string, snapshotID string,
// Find out which retent policy applies based on the age.
for i < len(retentionPolicies) &&
int(now-snapshot.StartTime) < retentionPolicies[i].Age*secondsInDay {
getDaysBetween(snapshot.StartTime, now) < retentionPolicies[i].Age {
i++
lastSnapshotTime = 0
}
@@ -1920,9 +1930,8 @@ func (manager *SnapshotManager) PruneSnapshots(selfID string, snapshotID string,
snapshot.Flag = true
toBeDeleted++
} else if lastSnapshotTime != 0 &&
int(snapshot.StartTime-lastSnapshotTime) < retentionPolicies[i].Interval*secondsInDay-600 {
// Delete the snapshot if it is too close to the last kept one. Note that a tolerance of 10
// minutes was subtracted from the interval.
getDaysBetween(lastSnapshotTime, snapshot.StartTime) < retentionPolicies[i].Interval {
// Delete the snapshot if it is too close to the last kept one.
LOG_DEBUG("SNAPSHOT_DELETE", "Snapshot %s at revision %d to be deleted - older than %d days, less than %d days from previous",
snapshot.ID, snapshot.Revision, retentionPolicies[i].Age, retentionPolicies[i].Interval)
snapshot.Flag = true