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Allow compaction at bucket top level. (#15266) 

If more than 1M folders (objects or prefixes) are found at the top level in a bucket allow it to be compacted.

While very suboptimal structure we should limit memory usage at some point.
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Klaus Post 2022-07-11 07:59:03 -07:00 committed by GitHub
parent 913e977c8d
commit 37a6b2da67
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1 changed files with 12 additions and 9 deletions
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21
cmd/data-scanner.go
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@ -48,12 +48,13 @@ import (
)
const (
dataScannerSleepPerFolder = time.Millisecond // Time to wait between folders.
dataUsageUpdateDirCycles = 16 // Visit all folders every n cycles.
dataScannerCompactLeastObject = 500 // Compact when there is less than this many objects in a branch.
dataScannerCompactAtChildren = 10000 // Compact when there are this many children in a branch.
dataScannerCompactAtFolders = dataScannerCompactAtChildren / 4 // Compact when this many subfolders in a single folder.
dataScannerStartDelay = 1 * time.Minute // Time to wait on startup and between cycles.
dataScannerSleepPerFolder = time.Millisecond // Time to wait between folders.
dataUsageUpdateDirCycles = 16 // Visit all folders every n cycles.
dataScannerCompactLeastObject = 500 // Compact when there is less than this many objects in a branch.
dataScannerCompactAtChildren = 10000 // Compact when there are this many children in a branch.
dataScannerCompactAtFolders = dataScannerCompactAtChildren / 4 // Compact when this many subfolders in a single folder.
dataScannerForceCompactAtFolders = 1_000_000 // Compact when this many subfolders in a single folder (even top level).
dataScannerStartDelay = 1 * time.Minute // Time to wait on startup and between cycles.
healDeleteDangling = true
healFolderIncludeProb = 32 // Include a clean folder one in n cycles.
@ -566,9 +567,11 @@ func (f *folderScanner) scanFolder(ctx context.Context, folder cachedFolder, int
}
// If we have many subfolders, compact ourself.
if !into.Compacted &&
f.newCache.Info.Name != folder.name &&
len(existingFolders)+len(newFolders) >= dataScannerCompactAtFolders {
shouldCompact := f.newCache.Info.Name != folder.name &&
len(existingFolders)+len(newFolders) >= dataScannerCompactAtFolders ||
len(existingFolders)+len(newFolders) >= dataScannerForceCompactAtFolders
if !into.Compacted && shouldCompact {
into.Compacted = true
newFolders = append(newFolders, existingFolders...)
existingFolders = nil