diff --git a/Builds/CMake/RippledCore.cmake b/Builds/CMake/RippledCore.cmake
index 6fc33cdee..43df0959a 100644
--- a/Builds/CMake/RippledCore.cmake
+++ b/Builds/CMake/RippledCore.cmake
@@ -548,7 +548,6 @@ target_sources (rippled PRIVATE
   src/ripple/nodestore/backend/CassandraFactory.cpp
   src/ripple/nodestore/backend/RWDBFactory.cpp
   src/ripple/nodestore/backend/MemoryFactory.cpp
-  src/ripple/nodestore/backend/FlatmapFactory.cpp
   src/ripple/nodestore/backend/NuDBFactory.cpp
   src/ripple/nodestore/backend/NullFactory.cpp
   src/ripple/nodestore/backend/RocksDBFactory.cpp
diff --git a/src/ripple/app/rdb/backend/FlatmapDatabase.h b/src/ripple/app/rdb/backend/FlatmapDatabase.h
deleted file mode 100644
index 00927b1d4..000000000
--- a/src/ripple/app/rdb/backend/FlatmapDatabase.h
+++ /dev/null
@@ -1,851 +0,0 @@
-#ifndef RIPPLE_APP_RDB_BACKEND_FLATMAPDATABASE_H_INCLUDED
-#define RIPPLE_APP_RDB_BACKEND_FLATMAPDATABASE_H_INCLUDED
-
-#include <ripple/app/ledger/AcceptedLedger.h>
-#include <ripple/app/ledger/LedgerMaster.h>
-#include <ripple/app/ledger/TransactionMaster.h>
-#include <ripple/app/rdb/backend/SQLiteDatabase.h>
-#include <algorithm>
-#include <map>
-#include <mutex>
-#include <optional>
-#include <shared_mutex>
-#include <vector>
-
-#include <boost/unordered/concurrent_flat_map.hpp>
-
-namespace ripple {
-
-struct base_uint_hasher
-{
-    using result_type = std::size_t;
-
-    result_type
-    operator()(base_uint<256> const& value) const
-    {
-        return hardened_hash<>{}(value);
-    }
-
-    result_type
-    operator()(AccountID const& value) const
-    {
-        return hardened_hash<>{}(value);
-    }
-};
-
-class FlatmapDatabase : public SQLiteDatabase
-{
-private:
-    struct LedgerData
-    {
-        LedgerInfo info;
-        boost::unordered::
-            concurrent_flat_map<uint256, AccountTx, base_uint_hasher>
-                transactions;
-    };
-
-    struct AccountTxData
-    {
-        boost::unordered::
-            concurrent_flat_map<std::pair<uint32_t, uint32_t>, AccountTx>
-                transactions;
-    };
-
-    Application& app_;
-
-    boost::unordered::concurrent_flat_map<LedgerIndex, LedgerData> ledgers_;
-    boost::unordered::
-        concurrent_flat_map<uint256, LedgerIndex, base_uint_hasher>
-            ledgerHashToSeq_;
-    boost::unordered::concurrent_flat_map<uint256, AccountTx, base_uint_hasher>
-        transactionMap_;
-    boost::unordered::
-        concurrent_flat_map<AccountID, AccountTxData, base_uint_hasher>
-            accountTxMap_;
-
-public:
-    FlatmapDatabase(Application& app, Config const& config, JobQueue& jobQueue)
-        : app_(app)
-    {
-    }
-
-    std::optional<LedgerIndex>
-    getMinLedgerSeq() override
-    {
-        std::optional<LedgerIndex> minSeq;
-        ledgers_.visit_all([&minSeq](auto const& pair) {
-            if (!minSeq || pair.first < *minSeq)
-            {
-                minSeq = pair.first;
-            }
-        });
-        return minSeq;
-    }
-
-    std::optional<LedgerIndex>
-    getTransactionsMinLedgerSeq() override
-    {
-        std::optional<LedgerIndex> minSeq;
-        transactionMap_.visit_all([&minSeq](auto const& pair) {
-            LedgerIndex seq = pair.second.second->getLgrSeq();
-            if (!minSeq || seq < *minSeq)
-            {
-                minSeq = seq;
-            }
-        });
-        return minSeq;
-    }
-
-    std::optional<LedgerIndex>
-    getAccountTransactionsMinLedgerSeq() override
-    {
-        std::optional<LedgerIndex> minSeq;
-        accountTxMap_.visit_all([&minSeq](auto const& pair) {
-            pair.second.transactions.visit_all([&minSeq](auto const& tx) {
-                if (!minSeq || tx.first.first < *minSeq)
-                {
-                    minSeq = tx.first.first;
-                }
-            });
-        });
-        return minSeq;
-    }
-
-    std::optional<LedgerIndex>
-    getMaxLedgerSeq() override
-    {
-        std::optional<LedgerIndex> maxSeq;
-        ledgers_.visit_all([&maxSeq](auto const& pair) {
-            if (!maxSeq || pair.first > *maxSeq)
-            {
-                maxSeq = pair.first;
-            }
-        });
-        return maxSeq;
-    }
-    void
-    deleteTransactionByLedgerSeq(LedgerIndex ledgerSeq) override
-    {
-        ledgers_.visit(ledgerSeq, [this](auto& item) {
-            item.second.transactions.visit_all([this](auto const& txPair) {
-                transactionMap_.erase(txPair.first);
-            });
-            item.second.transactions.clear();
-        });
-
-        accountTxMap_.visit_all([ledgerSeq](auto& item) {
-            item.second.transactions.erase_if([ledgerSeq](auto const& tx) {
-                return tx.first.first == ledgerSeq;
-            });
-        });
-    }
-
-    void
-    deleteBeforeLedgerSeq(LedgerIndex ledgerSeq) override
-    {
-        ledgers_.erase_if([this, ledgerSeq](auto const& item) {
-            if (item.first < ledgerSeq)
-            {
-                item.second.transactions.visit_all([this](auto const& txPair) {
-                    transactionMap_.erase(txPair.first);
-                });
-                ledgerHashToSeq_.erase(item.second.info.hash);
-                return true;
-            }
-            return false;
-        });
-
-        accountTxMap_.visit_all([ledgerSeq](auto& item) {
-            item.second.transactions.erase_if([ledgerSeq](auto const& tx) {
-                return tx.first.first < ledgerSeq;
-            });
-        });
-    }
-
-    void
-    deleteTransactionsBeforeLedgerSeq(LedgerIndex ledgerSeq) override
-    {
-        ledgers_.visit_all([this, ledgerSeq](auto& item) {
-            if (item.first < ledgerSeq)
-            {
-                item.second.transactions.visit_all([this](auto const& txPair) {
-                    transactionMap_.erase(txPair.first);
-                });
-                item.second.transactions.clear();
-            }
-        });
-
-        accountTxMap_.visit_all([ledgerSeq](auto& item) {
-            item.second.transactions.erase_if([ledgerSeq](auto const& tx) {
-                return tx.first.first < ledgerSeq;
-            });
-        });
-    }
-
-    void
-    deleteAccountTransactionsBeforeLedgerSeq(LedgerIndex ledgerSeq) override
-    {
-        accountTxMap_.visit_all([ledgerSeq](auto& item) {
-            item.second.transactions.erase_if([ledgerSeq](auto const& tx) {
-                return tx.first.first < ledgerSeq;
-            });
-        });
-    }
-    std::size_t
-    getTransactionCount() override
-    {
-        return transactionMap_.size();
-    }
-
-    std::size_t
-    getAccountTransactionCount() override
-    {
-        std::size_t count = 0;
-        accountTxMap_.visit_all([&count](auto const& item) {
-            count += item.second.transactions.size();
-        });
-        return count;
-    }
-
-    CountMinMax
-    getLedgerCountMinMax() override
-    {
-        CountMinMax result{0, 0, 0};
-        ledgers_.visit_all([&result](auto const& item) {
-            result.numberOfRows++;
-            if (result.minLedgerSequence == 0 ||
-                item.first < result.minLedgerSequence)
-            {
-                result.minLedgerSequence = item.first;
-            }
-            if (item.first > result.maxLedgerSequence)
-            {
-                result.maxLedgerSequence = item.first;
-            }
-        });
-        return result;
-    }
-
-    bool
-    saveValidatedLedger(
-        std::shared_ptr<Ledger const> const& ledger,
-        bool current) override
-    {
-        try
-        {
-            LedgerData ledgerData;
-            ledgerData.info = ledger->info();
-
-            auto aLedger = std::make_shared<AcceptedLedger>(ledger, app_);
-            for (auto const& acceptedLedgerTx : *aLedger)
-            {
-                auto const& txn = acceptedLedgerTx->getTxn();
-                auto const& meta = acceptedLedgerTx->getMeta();
-                auto const& id = txn->getTransactionID();
-
-                std::string reason;
-                auto accTx = std::make_pair(
-                    std::make_shared<ripple::Transaction>(txn, reason, app_),
-                    std::make_shared<ripple::TxMeta>(meta));
-
-                ledgerData.transactions.emplace(id, accTx);
-                transactionMap_.emplace(id, accTx);
-
-                for (auto const& account : meta.getAffectedAccounts())
-                {
-                    accountTxMap_.visit(account, [&](auto& data) {
-                        data.second.transactions.emplace(
-                            std::make_pair(
-                                ledger->info().seq,
-                                acceptedLedgerTx->getTxnSeq()),
-                            accTx);
-                    });
-                }
-            }
-
-            ledgers_.emplace(ledger->info().seq, std::move(ledgerData));
-            ledgerHashToSeq_.emplace(ledger->info().hash, ledger->info().seq);
-
-            if (current)
-            {
-                auto const cutoffSeq =
-                    ledger->info().seq > app_.config().LEDGER_HISTORY
-                    ? ledger->info().seq - app_.config().LEDGER_HISTORY
-                    : 0;
-
-                if (cutoffSeq > 0)
-                {
-                    const std::size_t BATCH_SIZE = 128;
-                    std::size_t deleted = 0;
-
-                    ledgers_.erase_if([&](auto const& item) {
-                        if (deleted >= BATCH_SIZE)
-                            return false;
-
-                        if (item.first < cutoffSeq)
-                        {
-                            item.second.transactions.visit_all(
-                                [this](auto const& txPair) {
-                                    transactionMap_.erase(txPair.first);
-                                });
-                            ledgerHashToSeq_.erase(item.second.info.hash);
-                            deleted++;
-                            return true;
-                        }
-                        return false;
-                    });
-
-                    if (deleted > 0)
-                    {
-                        accountTxMap_.visit_all([cutoffSeq](auto& item) {
-                            item.second.transactions.erase_if(
-                                [cutoffSeq](auto const& tx) {
-                                    return tx.first.first < cutoffSeq;
-                                });
-                        });
-                    }
-
-                    app_.getLedgerMaster().clearPriorLedgers(cutoffSeq);
-                }
-            }
-
-            return true;
-        }
-        catch (std::exception const&)
-        {
-            deleteTransactionByLedgerSeq(ledger->info().seq);
-            return false;
-        }
-    }
-
-    std::optional<LedgerInfo>
-    getLedgerInfoByIndex(LedgerIndex ledgerSeq) override
-    {
-        std::optional<LedgerInfo> result;
-        ledgers_.visit(ledgerSeq, [&result](auto const& item) {
-            result = item.second.info;
-        });
-        return result;
-    }
-
-    std::optional<LedgerInfo>
-    getNewestLedgerInfo() override
-    {
-        std::optional<LedgerInfo> result;
-        ledgers_.visit_all([&result](auto const& item) {
-            if (!result || item.second.info.seq > result->seq)
-            {
-                result = item.second.info;
-            }
-        });
-        return result;
-    }
-
-    std::optional<LedgerInfo>
-    getLimitedOldestLedgerInfo(LedgerIndex ledgerFirstIndex) override
-    {
-        std::optional<LedgerInfo> result;
-        ledgers_.visit_all([&](auto const& item) {
-            if (item.first >= ledgerFirstIndex &&
-                (!result || item.first < result->seq))
-            {
-                result = item.second.info;
-            }
-        });
-        return result;
-    }
-
-    std::optional<LedgerInfo>
-    getLimitedNewestLedgerInfo(LedgerIndex ledgerFirstIndex) override
-    {
-        std::optional<LedgerInfo> result;
-        ledgers_.visit_all([&](auto const& item) {
-            if (item.first >= ledgerFirstIndex &&
-                (!result || item.first > result->seq))
-            {
-                result = item.second.info;
-            }
-        });
-        return result;
-    }
-
-    std::optional<LedgerInfo>
-    getLedgerInfoByHash(uint256 const& ledgerHash) override
-    {
-        std::optional<LedgerInfo> result;
-        ledgerHashToSeq_.visit(ledgerHash, [this, &result](auto const& item) {
-            ledgers_.visit(item.second, [&result](auto const& item) {
-                result = item.second.info;
-            });
-        });
-        return result;
-    }
-    uint256
-    getHashByIndex(LedgerIndex ledgerIndex) override
-    {
-        uint256 result;
-        ledgers_.visit(ledgerIndex, [&result](auto const& item) {
-            result = item.second.info.hash;
-        });
-        return result;
-    }
-
-    std::optional<LedgerHashPair>
-    getHashesByIndex(LedgerIndex ledgerIndex) override
-    {
-        std::optional<LedgerHashPair> result;
-        ledgers_.visit(ledgerIndex, [&result](auto const& item) {
-            result = LedgerHashPair{
-                item.second.info.hash, item.second.info.parentHash};
-        });
-        return result;
-    }
-
-    std::map<LedgerIndex, LedgerHashPair>
-    getHashesByIndex(LedgerIndex minSeq, LedgerIndex maxSeq) override
-    {
-        std::map<LedgerIndex, LedgerHashPair> result;
-        ledgers_.visit_all([&](auto const& item) {
-            if (item.first >= minSeq && item.first <= maxSeq)
-            {
-                result[item.first] = LedgerHashPair{
-                    item.second.info.hash, item.second.info.parentHash};
-            }
-        });
-        return result;
-    }
-
-    std::variant<AccountTx, TxSearched>
-    getTransaction(
-        uint256 const& id,
-        std::optional<ClosedInterval<std::uint32_t>> const& range,
-        error_code_i& ec) override
-    {
-        std::variant<AccountTx, TxSearched> result = TxSearched::unknown;
-        transactionMap_.visit(id, [&](auto const& item) {
-            auto const& tx = item.second;
-            if (!range ||
-                (range->lower() <= tx.second->getLgrSeq() &&
-                 tx.second->getLgrSeq() <= range->upper()))
-            {
-                result = tx;
-            }
-            else
-            {
-                result = TxSearched::all;
-            }
-        });
-        return result;
-    }
-
-    bool
-    ledgerDbHasSpace(Config const& config) override
-    {
-        return true;  // In-memory database always has space
-    }
-
-    bool
-    transactionDbHasSpace(Config const& config) override
-    {
-        return true;  // In-memory database always has space
-    }
-
-    std::uint32_t
-    getKBUsedAll() override
-    {
-        std::uint32_t size = sizeof(*this);
-        size += ledgers_.size() * (sizeof(LedgerIndex) + sizeof(LedgerData));
-        size +=
-            ledgerHashToSeq_.size() * (sizeof(uint256) + sizeof(LedgerIndex));
-        size += transactionMap_.size() * (sizeof(uint256) + sizeof(AccountTx));
-        accountTxMap_.visit_all([&size](auto const& item) {
-            size += sizeof(AccountID) + sizeof(AccountTxData);
-            size += item.second.transactions.size() * sizeof(AccountTx);
-        });
-        return size / 1024;  // Convert to KB
-    }
-
-    std::uint32_t
-    getKBUsedLedger() override
-    {
-        std::uint32_t size =
-            ledgers_.size() * (sizeof(LedgerIndex) + sizeof(LedgerData));
-        size +=
-            ledgerHashToSeq_.size() * (sizeof(uint256) + sizeof(LedgerIndex));
-        return size / 1024;
-    }
-
-    std::uint32_t
-    getKBUsedTransaction() override
-    {
-        std::uint32_t size =
-            transactionMap_.size() * (sizeof(uint256) + sizeof(AccountTx));
-        accountTxMap_.visit_all([&size](auto const& item) {
-            size += sizeof(AccountID) + sizeof(AccountTxData);
-            size += item.second.transactions.size() * sizeof(AccountTx);
-        });
-        return size / 1024;
-    }
-
-    void
-    closeLedgerDB() override
-    {
-        // No-op for in-memory database
-    }
-
-    void
-    closeTransactionDB() override
-    {
-        // No-op for in-memory database
-    }
-
-    ~FlatmapDatabase()
-    {
-        // Concurrent maps need visit_all
-        accountTxMap_.visit_all(
-            [](auto& pair) { pair.second.transactions.clear(); });
-        accountTxMap_.clear();
-
-        transactionMap_.clear();
-
-        ledgers_.visit_all(
-            [](auto& pair) { pair.second.transactions.clear(); });
-        ledgers_.clear();
-
-        ledgerHashToSeq_.clear();
-    }
-
-    std::vector<std::shared_ptr<Transaction>>
-    getTxHistory(LedgerIndex startIndex) override
-    {
-        std::vector<std::shared_ptr<Transaction>> result;
-        transactionMap_.visit_all([&](auto const& item) {
-            if (item.second.second->getLgrSeq() >= startIndex)
-            {
-                result.push_back(item.second.first);
-            }
-        });
-        std::sort(
-            result.begin(), result.end(), [](auto const& a, auto const& b) {
-                return a->getLedger() > b->getLedger();
-            });
-        if (result.size() > 20)
-        {
-            result.resize(20);
-        }
-        return result;
-    }
-    // Helper function to handle limits
-    template <typename Container>
-    void
-    applyLimit(Container& container, std::size_t limit, bool bUnlimited)
-    {
-        if (!bUnlimited && limit > 0 && container.size() > limit)
-        {
-            container.resize(limit);
-        }
-    }
-
-    AccountTxs
-    getOldestAccountTxs(AccountTxOptions const& options) override
-    {
-        AccountTxs result;
-        accountTxMap_.visit(options.account, [&](auto const& item) {
-            item.second.transactions.visit_all([&](auto const& tx) {
-                if (tx.first.first >= options.minLedger &&
-                    tx.first.first <= options.maxLedger)
-                {
-                    result.push_back(tx.second);
-                }
-            });
-        });
-        std::sort(
-            result.begin(), result.end(), [](auto const& a, auto const& b) {
-                return a.second->getLgrSeq() < b.second->getLgrSeq();
-            });
-        applyLimit(result, options.limit, options.bUnlimited);
-        return result;
-    }
-
-    AccountTxs
-    getNewestAccountTxs(AccountTxOptions const& options) override
-    {
-        AccountTxs result;
-        accountTxMap_.visit(options.account, [&](auto const& item) {
-            item.second.transactions.visit_all([&](auto const& tx) {
-                if (tx.first.first >= options.minLedger &&
-                    tx.first.first <= options.maxLedger)
-                {
-                    result.push_back(tx.second);
-                }
-            });
-        });
-        std::sort(
-            result.begin(), result.end(), [](auto const& a, auto const& b) {
-                return a.second->getLgrSeq() > b.second->getLgrSeq();
-            });
-        applyLimit(result, options.limit, options.bUnlimited);
-        return result;
-    }
-
-    MetaTxsList
-    getOldestAccountTxsB(AccountTxOptions const& options) override
-    {
-        MetaTxsList result;
-        accountTxMap_.visit(options.account, [&](auto const& item) {
-            item.second.transactions.visit_all([&](auto const& tx) {
-                if (tx.first.first >= options.minLedger &&
-                    tx.first.first <= options.maxLedger)
-                {
-                    result.emplace_back(
-                        tx.second.first->getSTransaction()
-                            ->getSerializer()
-                            .peekData(),
-                        tx.second.second->getAsObject()
-                            .getSerializer()
-                            .peekData(),
-                        tx.first.first);
-                }
-            });
-        });
-        std::sort(
-            result.begin(), result.end(), [](auto const& a, auto const& b) {
-                return std::get<2>(a) < std::get<2>(b);
-            });
-        applyLimit(result, options.limit, options.bUnlimited);
-        return result;
-    }
-
-    MetaTxsList
-    getNewestAccountTxsB(AccountTxOptions const& options) override
-    {
-        MetaTxsList result;
-        accountTxMap_.visit(options.account, [&](auto const& item) {
-            item.second.transactions.visit_all([&](auto const& tx) {
-                if (tx.first.first >= options.minLedger &&
-                    tx.first.first <= options.maxLedger)
-                {
-                    result.emplace_back(
-                        tx.second.first->getSTransaction()
-                            ->getSerializer()
-                            .peekData(),
-                        tx.second.second->getAsObject()
-                            .getSerializer()
-                            .peekData(),
-                        tx.first.first);
-                }
-            });
-        });
-        std::sort(
-            result.begin(), result.end(), [](auto const& a, auto const& b) {
-                return std::get<2>(a) > std::get<2>(b);
-            });
-        applyLimit(result, options.limit, options.bUnlimited);
-        return result;
-    }
-    std::pair<AccountTxs, std::optional<AccountTxMarker>>
-    oldestAccountTxPage(AccountTxPageOptions const& options) override
-    {
-        AccountTxs result;
-        std::optional<AccountTxMarker> marker;
-
-        accountTxMap_.visit(options.account, [&](auto const& item) {
-            std::vector<std::pair<std::pair<uint32_t, uint32_t>, AccountTx>>
-                txs;
-            item.second.transactions.visit_all([&](auto const& tx) {
-                if (tx.first.first >= options.minLedger &&
-                    tx.first.first <= options.maxLedger)
-                {
-                    txs.emplace_back(tx);
-                }
-            });
-
-            std::sort(txs.begin(), txs.end(), [](auto const& a, auto const& b) {
-                return a.first < b.first;
-            });
-
-            auto it = txs.begin();
-            if (options.marker)
-            {
-                it = std::find_if(txs.begin(), txs.end(), [&](auto const& tx) {
-                    return tx.first.first == options.marker->ledgerSeq &&
-                        tx.first.second == options.marker->txnSeq;
-                });
-                if (it != txs.end())
-                    ++it;
-            }
-
-            for (; it != txs.end() &&
-                 (options.limit == 0 || result.size() < options.limit);
-                 ++it)
-            {
-                result.push_back(it->second);
-            }
-
-            if (it != txs.end())
-            {
-                marker = AccountTxMarker{it->first.first, it->first.second};
-            }
-        });
-
-        return {result, marker};
-    }
-
-    std::pair<AccountTxs, std::optional<AccountTxMarker>>
-    newestAccountTxPage(AccountTxPageOptions const& options) override
-    {
-        AccountTxs result;
-        std::optional<AccountTxMarker> marker;
-
-        accountTxMap_.visit(options.account, [&](auto const& item) {
-            std::vector<std::pair<std::pair<uint32_t, uint32_t>, AccountTx>>
-                txs;
-            item.second.transactions.visit_all([&](auto const& tx) {
-                if (tx.first.first >= options.minLedger &&
-                    tx.first.first <= options.maxLedger)
-                {
-                    txs.emplace_back(tx);
-                }
-            });
-
-            std::sort(txs.begin(), txs.end(), [](auto const& a, auto const& b) {
-                return a.first > b.first;
-            });
-
-            auto it = txs.begin();
-            if (options.marker)
-            {
-                it = std::find_if(txs.begin(), txs.end(), [&](auto const& tx) {
-                    return tx.first.first == options.marker->ledgerSeq &&
-                        tx.first.second == options.marker->txnSeq;
-                });
-                if (it != txs.end())
-                    ++it;
-            }
-
-            for (; it != txs.end() &&
-                 (options.limit == 0 || result.size() < options.limit);
-                 ++it)
-            {
-                result.push_back(it->second);
-            }
-
-            if (it != txs.end())
-            {
-                marker = AccountTxMarker{it->first.first, it->first.second};
-            }
-        });
-
-        return {result, marker};
-    }
-
-    std::pair<MetaTxsList, std::optional<AccountTxMarker>>
-    oldestAccountTxPageB(AccountTxPageOptions const& options) override
-    {
-        MetaTxsList result;
-        std::optional<AccountTxMarker> marker;
-
-        accountTxMap_.visit(options.account, [&](auto const& item) {
-            std::vector<std::tuple<uint32_t, uint32_t, AccountTx>> txs;
-            item.second.transactions.visit_all([&](auto const& tx) {
-                if (tx.first.first >= options.minLedger &&
-                    tx.first.first <= options.maxLedger)
-                {
-                    txs.emplace_back(
-                        tx.first.first, tx.first.second, tx.second);
-                }
-            });
-
-            std::sort(txs.begin(), txs.end());
-
-            auto it = txs.begin();
-            if (options.marker)
-            {
-                it = std::find_if(txs.begin(), txs.end(), [&](auto const& tx) {
-                    return std::get<0>(tx) == options.marker->ledgerSeq &&
-                        std::get<1>(tx) == options.marker->txnSeq;
-                });
-                if (it != txs.end())
-                    ++it;
-            }
-
-            for (; it != txs.end() &&
-                 (options.limit == 0 || result.size() < options.limit);
-                 ++it)
-            {
-                const auto& [_, __, tx] = *it;
-                result.emplace_back(
-                    tx.first->getSTransaction()->getSerializer().peekData(),
-                    tx.second->getAsObject().getSerializer().peekData(),
-                    std::get<0>(*it));
-            }
-
-            if (it != txs.end())
-            {
-                marker = AccountTxMarker{std::get<0>(*it), std::get<1>(*it)};
-            }
-        });
-
-        return {result, marker};
-    }
-
-    std::pair<MetaTxsList, std::optional<AccountTxMarker>>
-    newestAccountTxPageB(AccountTxPageOptions const& options) override
-    {
-        MetaTxsList result;
-        std::optional<AccountTxMarker> marker;
-
-        accountTxMap_.visit(options.account, [&](auto const& item) {
-            std::vector<std::tuple<uint32_t, uint32_t, AccountTx>> txs;
-            item.second.transactions.visit_all([&](auto const& tx) {
-                if (tx.first.first >= options.minLedger &&
-                    tx.first.first <= options.maxLedger)
-                {
-                    txs.emplace_back(
-                        tx.first.first, tx.first.second, tx.second);
-                }
-            });
-
-            std::sort(txs.begin(), txs.end(), std::greater<>());
-
-            auto it = txs.begin();
-            if (options.marker)
-            {
-                it = std::find_if(txs.begin(), txs.end(), [&](auto const& tx) {
-                    return std::get<0>(tx) == options.marker->ledgerSeq &&
-                        std::get<1>(tx) == options.marker->txnSeq;
-                });
-                if (it != txs.end())
-                    ++it;
-            }
-
-            for (; it != txs.end() &&
-                 (options.limit == 0 || result.size() < options.limit);
-                 ++it)
-            {
-                const auto& [_, __, tx] = *it;
-                result.emplace_back(
-                    tx.first->getSTransaction()->getSerializer().peekData(),
-                    tx.second->getAsObject().getSerializer().peekData(),
-                    std::get<0>(*it));
-            }
-
-            if (it != txs.end())
-            {
-                marker = AccountTxMarker{std::get<0>(*it), std::get<1>(*it)};
-            }
-        });
-
-        return {result, marker};
-    }
-};
-
-// Factory function
-std::unique_ptr<SQLiteDatabase>
-getFlatmapDatabase(Application& app, Config const& config, JobQueue& jobQueue)
-{
-    return std::make_unique<FlatmapDatabase>(app, config, jobQueue);
-}
-
-}  // namespace ripple
-#endif  // RIPPLE_APP_RDB_BACKEND_FLATMAPDATABASE_H_INCLUDED
diff --git a/src/ripple/app/rdb/impl/RelationalDatabase.cpp b/src/ripple/app/rdb/impl/RelationalDatabase.cpp
index 64161bd53..bf24d7dc7 100644
--- a/src/ripple/app/rdb/impl/RelationalDatabase.cpp
+++ b/src/ripple/app/rdb/impl/RelationalDatabase.cpp
@@ -19,7 +19,6 @@
 
 #include <ripple/app/main/Application.h>
 #include <ripple/app/rdb/RelationalDatabase.h>
-#include <ripple/app/rdb/backend/FlatmapDatabase.h>
 #include <ripple/app/rdb/backend/RWDBDatabase.h>
 #include <ripple/core/ConfigSections.h>
 #include <ripple/nodestore/DatabaseShard.h>
@@ -41,7 +40,6 @@ RelationalDatabase::init(
     bool use_sqlite = false;
     bool use_postgres = false;
     bool use_rwdb = false;
-    bool use_flatmap = false;
 
     if (config.reporting())
     {
@@ -60,10 +58,6 @@ RelationalDatabase::init(
             {
                 use_rwdb = true;
             }
-            else if (boost::iequals(get(rdb_section, "backend"), "flatmap"))
-            {
-                use_flatmap = true;
-            }
             else
             {
                 Throw<std::runtime_error>(
@@ -89,10 +83,6 @@ RelationalDatabase::init(
     {
         return getRWDBDatabase(app, config, jobQueue);
     }
-    else if (use_flatmap)
-    {
-        return getFlatmapDatabase(app, config, jobQueue);
-    }
 
     return std::unique_ptr<RelationalDatabase>();
 }
diff --git a/src/ripple/core/Config.h b/src/ripple/core/Config.h
index 3e2c3c81a..99af17272 100644
--- a/src/ripple/core/Config.h
+++ b/src/ripple/core/Config.h
@@ -363,7 +363,7 @@ public:
             (!section("node_db").empty() &&
              (boost::beast::iequals(get(section("node_db"), "type"), "rwdb") ||
               boost::beast::iequals(
-                  get(section("node_db"), "type"), "flatmap")));
+                  get(section("node_db"), "type"), "memory")));
         // RHNOTE: memory type is not selected for here because it breaks
         // tests
         return isMem;
diff --git a/src/ripple/nodestore/backend/FlatmapFactory.cpp b/src/ripple/nodestore/backend/FlatmapFactory.cpp
deleted file mode 100644
index 4cec115ef..000000000
--- a/src/ripple/nodestore/backend/FlatmapFactory.cpp
+++ /dev/null
@@ -1,235 +0,0 @@
-#include <ripple/basics/contract.h>
-#include <ripple/nodestore/Factory.h>
-#include <ripple/nodestore/Manager.h>
-#include <ripple/nodestore/impl/DecodedBlob.h>
-#include <ripple/nodestore/impl/EncodedBlob.h>
-#include <ripple/nodestore/impl/codec.h>
-#include <boost/beast/core/string.hpp>
-#include <boost/core/ignore_unused.hpp>
-#include <boost/unordered/concurrent_flat_map.hpp>
-#include <memory>
-#include <mutex>
-
-namespace ripple {
-namespace NodeStore {
-
-class FlatmapBackend : public Backend
-{
-private:
-    std::string name_;
-    beast::Journal journal_;
-    bool isOpen_{false};
-
-    struct base_uint_hasher
-    {
-        using result_type = std::size_t;
-
-        result_type
-        operator()(base_uint<256> const& value) const
-        {
-            return hardened_hash<>{}(value);
-        }
-    };
-
-    using DataStore = boost::unordered::concurrent_flat_map<
-        uint256,
-        std::vector<std::uint8_t>,  // Store compressed blob data
-        base_uint_hasher>;
-
-    DataStore table_;
-
-public:
-    FlatmapBackend(
-        size_t keyBytes,
-        Section const& keyValues,
-        beast::Journal journal)
-        : name_(get(keyValues, "path")), journal_(journal)
-    {
-        boost::ignore_unused(journal_);
-        if (name_.empty())
-            name_ = "node_db";
-    }
-
-    ~FlatmapBackend() override
-    {
-        close();
-    }
-
-    std::string
-    getName() override
-    {
-        return name_;
-    }
-
-    void
-    open(bool createIfMissing) override
-    {
-        if (isOpen_)
-            Throw<std::runtime_error>("already open");
-        isOpen_ = true;
-    }
-
-    bool
-    isOpen() override
-    {
-        return isOpen_;
-    }
-
-    void
-    close() override
-    {
-        table_.clear();
-        isOpen_ = false;
-    }
-
-    Status
-    fetch(void const* key, std::shared_ptr<NodeObject>* pObject) override
-    {
-        if (!isOpen_)
-            return notFound;
-
-        uint256 const hash(uint256::fromVoid(key));
-
-        bool found = table_.visit(hash, [&](const auto& key_value_pair) {
-            nudb::detail::buffer bf;
-            auto const result = nodeobject_decompress(
-                key_value_pair.second.data(), key_value_pair.second.size(), bf);
-            DecodedBlob decoded(hash.data(), result.first, result.second);
-            if (!decoded.wasOk())
-            {
-                *pObject = nullptr;
-                return;
-            }
-            *pObject = decoded.createObject();
-        });
-        return found ? (*pObject ? ok : dataCorrupt) : notFound;
-    }
-
-    std::pair<std::vector<std::shared_ptr<NodeObject>>, Status>
-    fetchBatch(std::vector<uint256 const*> const& hashes) override
-    {
-        std::vector<std::shared_ptr<NodeObject>> results;
-        results.reserve(hashes.size());
-        for (auto const& h : hashes)
-        {
-            std::shared_ptr<NodeObject> nObj;
-            Status status = fetch(h->begin(), &nObj);
-            if (status != ok)
-                results.push_back({});
-            else
-                results.push_back(nObj);
-        }
-        return {results, ok};
-    }
-
-    void
-    store(std::shared_ptr<NodeObject> const& object) override
-    {
-        if (!isOpen_)
-            return;
-
-        if (!object)
-            return;
-
-        EncodedBlob encoded(object);
-        nudb::detail::buffer bf;
-        auto const result =
-            nodeobject_compress(encoded.getData(), encoded.getSize(), bf);
-
-        std::vector<std::uint8_t> compressed(
-            static_cast<const std::uint8_t*>(result.first),
-            static_cast<const std::uint8_t*>(result.first) + result.second);
-
-        table_.insert_or_assign(object->getHash(), std::move(compressed));
-    }
-
-    void
-    storeBatch(Batch const& batch) override
-    {
-        for (auto const& e : batch)
-            store(e);
-    }
-
-    void
-    sync() override
-    {
-    }
-
-    void
-    for_each(std::function<void(std::shared_ptr<NodeObject>)> f) override
-    {
-        if (!isOpen_)
-            return;
-
-        table_.visit_all([&f](const auto& entry) {
-            nudb::detail::buffer bf;
-            auto const result = nodeobject_decompress(
-                entry.second.data(), entry.second.size(), bf);
-            DecodedBlob decoded(
-                entry.first.data(), result.first, result.second);
-            if (decoded.wasOk())
-                f(decoded.createObject());
-        });
-    }
-
-    int
-    getWriteLoad() override
-    {
-        return 0;
-    }
-
-    void
-    setDeletePath() override
-    {
-        close();
-    }
-
-    int
-    fdRequired() const override
-    {
-        return 0;
-    }
-
-private:
-    size_t
-    size() const
-    {
-        return table_.size();
-    }
-};
-
-class FlatmapFactory : public Factory
-{
-public:
-    FlatmapFactory()
-    {
-        Manager::instance().insert(*this);
-    }
-
-    ~FlatmapFactory() override
-    {
-        Manager::instance().erase(*this);
-    }
-
-    std::string
-    getName() const override
-    {
-        return "Flatmap";
-    }
-
-    std::unique_ptr<Backend>
-    createInstance(
-        size_t keyBytes,
-        Section const& keyValues,
-        std::size_t burstSize,
-        Scheduler& scheduler,
-        beast::Journal journal) override
-    {
-        return std::make_unique<FlatmapBackend>(keyBytes, keyValues, journal);
-    }
-};
-
-static FlatmapFactory flatmapFactory;
-
-}  // namespace NodeStore
-}  // namespace ripple