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Limit copy-forward to ledgers we're not about to delete, and unknown

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This commit is contained in:
Ed Hennis
2026-07-15 20:52:02 -04:00
parent 306bfd302c
commit 0efa990b6a
4 changed files with 31 additions and 14 deletions
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3
include/xrpl/nodestore/DatabaseRotating.h
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@@ -4,6 +4,7 @@
#include <xrpl/nodestore/Backend.h>
#include <xrpl/nodestore/Database.h>
#include <xrpl/nodestore/Scheduler.h>
#include <xrpl/protocol/Protocol.h>
#include <functional>
#include <memory>
@@ -53,7 +54,7 @@ public:
* dropped.
*/
virtual void
setRotationInFlight(bool inFlight) = 0;
setRotationInFlight(LedgerIndex inFlight) = 0;
};
} // namespace xrpl::NodeStore

18
include/xrpl/nodestore/detail/DatabaseRotatingImp.h
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@@ -8,6 +8,7 @@
#include <xrpl/nodestore/DatabaseRotating.h>
#include <xrpl/nodestore/NodeObject.h>
#include <xrpl/nodestore/Scheduler.h>
#include <xrpl/protocol/Protocol.h>
#include <atomic>
#include <cstdint>
@@ -71,20 +72,25 @@ public:
sweep() override;
void
setRotationInFlight(bool inFlight) override;
setRotationInFlight(LedgerIndex inFlight) override;
private:
std::shared_ptr<Backend> writableBackend_;
std::shared_ptr<Backend> archiveBackend_;
mutable std::mutex mutex_;
// True between SHAMapStore starting the cache-freshen phase and the
// completion of rotate(). While true, archive hits on ordinary
// (duplicate == false) fetches are copied forward into the writable
// backend; copyForwardCount_ tallies them per rotation for the
// Set to the index of the last rotated ledger between SHAMapStore
// starting the cache-freshen phase and the completion of rotate().
// While non-zero, archive hits on ordinary (duplicate == false)
// fetches are copied forward into the writable backend if they are
// for that ledger or later, since those are the ones we'll keep.
// To be safe, copy forward if the provided ledger index is 0.
// copyForwardCount_ tallies them per rotation for the
// summary line logged at swap.
std::atomic<bool> rotationInFlight_{false};
// copyRejectCount_ tallies the ones that weren't copied.
std::atomic<LedgerIndex> rotationInFlight_{0};
std::atomic<std::uint64_t> copyForwardCount_{0};
std::atomic<std::uint64_t> copyRejectCount_{0};
std::shared_ptr<NodeObject>
fetchNodeObject(uint256 const& hash, std::uint32_t, FetchReport& fetchReport, bool duplicate)