Enforce minimum bucked used bits at document metastore load time

1 files changed, 17 insertions, 0 deletions

diff --git a/persistence/src/vespa/persistence/spi/bucket_limits.h b/persistence/src/vespa/persistence/spi/bucket_limits.h
new file mode 100644
index 00000000000..65b2660eb23
--- /dev/null
+++ b/persistence/src/vespa/persistence/spi/bucket_limits.h
@@ -0,0 +1,17 @@
+#pragma once
+
+#include <cstdint>
+
+namespace storage::spi {
+
+/**
+ * Wrapper of constants that specify absolute lower and upper bounds for buckets
+ * that are to be processed on a node. These invariants must be maintained by
+ * split and join operations, as well as bucket creation.
+ */
+struct BucketLimits {
+    constexpr static uint8_t MinUsedBits = 8;
+    constexpr static uint8_t MaxUsedBits = 58;
+};
+
+}