diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -3197,7 +3197,6 @@
     'PhabricatorMustVerifyEmailController' => 'applications/auth/controller/PhabricatorMustVerifyEmailController.php',
     'PhabricatorMySQLConfigOptions' => 'applications/config/option/PhabricatorMySQLConfigOptions.php',
     'PhabricatorMySQLFileStorageEngine' => 'applications/files/engine/PhabricatorMySQLFileStorageEngine.php',
-    'PhabricatorMySQLFulltextStorageEngine' => 'applications/search/fulltextstorage/PhabricatorMySQLFulltextStorageEngine.php',
     'PhabricatorMySQLSearchHost' => 'infrastructure/cluster/search/PhabricatorMySQLSearchHost.php',
     'PhabricatorMySQLSetupCheck' => 'applications/config/check/PhabricatorMySQLSetupCheck.php',
     'PhabricatorNamedQuery' => 'applications/search/storage/PhabricatorNamedQuery.php',
@@ -8588,7 +8587,6 @@
     'PhabricatorMustVerifyEmailController' => 'PhabricatorAuthController',
     'PhabricatorMySQLConfigOptions' => 'PhabricatorApplicationConfigOptions',
     'PhabricatorMySQLFileStorageEngine' => 'PhabricatorFileStorageEngine',
-    'PhabricatorMySQLFulltextStorageEngine' => 'PhabricatorFulltextStorageEngine',
     'PhabricatorMySQLSearchHost' => 'PhabricatorSearchHost',
     'PhabricatorMySQLSetupCheck' => 'PhabricatorSetupCheck',
     'PhabricatorNamedQuery' => array(
diff --git a/src/applications/search/fulltextstorage/PhabricatorFerretFulltextStorageEngine.php b/src/applications/search/fulltextstorage/PhabricatorFerretFulltextStorageEngine.php
--- a/src/applications/search/fulltextstorage/PhabricatorFerretFulltextStorageEngine.php
+++ b/src/applications/search/fulltextstorage/PhabricatorFerretFulltextStorageEngine.php
@@ -7,7 +7,7 @@
   private $engineLimits;
 
   public function getEngineIdentifier() {
-    return 'ferret';
+    return 'mysql';
   }
 
   public function getHostType() {
diff --git a/src/applications/search/fulltextstorage/PhabricatorMySQLFulltextStorageEngine.php b/src/applications/search/fulltextstorage/PhabricatorMySQLFulltextStorageEngine.php
deleted file mode 100644
--- a/src/applications/search/fulltextstorage/PhabricatorMySQLFulltextStorageEngine.php
+++ /dev/null
@@ -1,504 +0,0 @@
-<?php
-
-final class PhabricatorMySQLFulltextStorageEngine
-  extends PhabricatorFulltextStorageEngine {
-
-  private $fulltextTokens = array();
-  private $engineLimits;
-
-  public function getEngineIdentifier() {
-    return 'mysql';
-  }
-
-  public function getHostType() {
-    return new PhabricatorMySQLSearchHost($this);
-  }
-
-  public function reindexAbstractDocument(
-    PhabricatorSearchAbstractDocument $doc) {
-
-    $phid = $doc->getPHID();
-    if (!$phid) {
-      throw new Exception(pht('Document has no PHID!'));
-    }
-
-    $store = new PhabricatorSearchDocument();
-    $store->setPHID($doc->getPHID());
-    $store->setDocumentType($doc->getDocumentType());
-    $store->setDocumentTitle($doc->getDocumentTitle());
-    $store->setDocumentCreated($doc->getDocumentCreated());
-    $store->setDocumentModified($doc->getDocumentModified());
-    $store->replace();
-
-    $conn_w = $store->establishConnection('w');
-
-    $stemmer = new PhutilSearchStemmer();
-
-    $field_dao = new PhabricatorSearchDocumentField();
-    queryfx(
-      $conn_w,
-      'DELETE FROM %T WHERE phid = %s',
-      $field_dao->getTableName(),
-      $phid);
-    foreach ($doc->getFieldData() as $field) {
-      list($ftype, $corpus, $aux_phid) = $field;
-
-      $stemmed_corpus = $stemmer->stemCorpus($corpus);
-
-      queryfx(
-        $conn_w,
-        'INSERT INTO %T
-          (phid, phidType, field, auxPHID, corpus, stemmedCorpus) '.
-        'VALUES (%s, %s, %s, %ns, %s, %s)',
-        $field_dao->getTableName(),
-        $phid,
-        $doc->getDocumentType(),
-        $ftype,
-        $aux_phid,
-        $corpus,
-        $stemmed_corpus);
-    }
-
-
-    $sql = array();
-    foreach ($doc->getRelationshipData() as $relationship) {
-      list($rtype, $to_phid, $to_type, $time) = $relationship;
-      $sql[] = qsprintf(
-        $conn_w,
-        '(%s, %s, %s, %s, %d)',
-        $phid,
-        $to_phid,
-        $rtype,
-        $to_type,
-        $time);
-    }
-
-    $rship_dao = new PhabricatorSearchDocumentRelationship();
-    queryfx(
-      $conn_w,
-      'DELETE FROM %T WHERE phid = %s',
-      $rship_dao->getTableName(),
-      $phid);
-    if ($sql) {
-      queryfx(
-        $conn_w,
-        'INSERT INTO %T '.
-        '(phid, relatedPHID, relation, relatedType, relatedTime) '.
-        'VALUES %Q',
-        $rship_dao->getTableName(),
-        implode(', ', $sql));
-    }
-
-  }
-
-  public function executeSearch(PhabricatorSavedQuery $query) {
-    $table = new PhabricatorSearchDocument();
-    $document_table = $table->getTableName();
-    $conn = $table->establishConnection('r');
-
-    $subquery = $this->newFulltextSubquery($query, $conn);
-
-    $offset = (int)$query->getParameter('offset', 0);
-    $limit  = (int)$query->getParameter('limit', 25);
-
-    // NOTE: We must JOIN the subquery in order to apply a limit.
-    $results = queryfx_all(
-      $conn,
-      'SELECT
-        documentPHID,
-        MAX(fieldScore) AS documentScore
-        FROM (%Q) query
-        JOIN %T root ON query.documentPHID = root.phid
-        GROUP BY documentPHID
-        ORDER BY documentScore DESC
-        LIMIT %d, %d',
-      $subquery,
-      $document_table,
-      $offset,
-      $limit);
-
-    return ipull($results, 'documentPHID');
-  }
-
-  private function newFulltextSubquery(
-    PhabricatorSavedQuery $query,
-    AphrontDatabaseConnection $conn) {
-
-    $field = new PhabricatorSearchDocumentField();
-    $field_table = $field->getTableName();
-
-    $document = new PhabricatorSearchDocument();
-    $document_table = $document->getTableName();
-
-    $select = array();
-    $select[] = 'document.phid AS documentPHID';
-
-    $join = array();
-    $where = array();
-
-    $title_field = PhabricatorSearchDocumentFieldType::FIELD_TITLE;
-    $title_boost = 1024;
-
-    $stemmer = new PhutilSearchStemmer();
-
-    $raw_query = $query->getParameter('query');
-    $raw_query = trim($raw_query);
-    if (strlen($raw_query)) {
-      $compiler = PhabricatorSearchDocument::newQueryCompiler()
-        ->setStemmer($stemmer);
-
-      $tokens = $compiler->newTokens($raw_query);
-
-      list($min_length, $stopword_list) = $this->getEngineLimits($conn);
-
-      // Process all the parts of the user's query so we can show them which
-      // parts we searched for and which ones we ignored.
-      $fulltext_tokens = array();
-      foreach ($tokens as $key => $token) {
-        $fulltext_token = id(new PhabricatorFulltextToken())
-          ->setToken($token);
-
-        $fulltext_tokens[$key] = $fulltext_token;
-
-        $value = $token->getValue();
-
-        // If the value is unquoted, we'll stem it in the query, so stem it
-        // here before performing filtering tests. See T12596.
-        if (!$token->isQuoted()) {
-          $value = $stemmer->stemToken($value);
-        }
-
-        if ($this->isShortToken($value, $min_length)) {
-          $fulltext_token->setIsShort(true);
-          continue;
-        }
-
-        if (isset($stopword_list[phutil_utf8_strtolower($value)])) {
-          $fulltext_token->setIsStopword(true);
-          continue;
-        }
-      }
-      $this->fulltextTokens = $fulltext_tokens;
-
-      // Remove tokens which aren't queryable from the query. This is mostly
-      // a workaround for the peculiar behaviors described in T12137.
-      foreach ($this->fulltextTokens as $key => $fulltext_token) {
-        if (!$fulltext_token->isQueryable()) {
-          unset($tokens[$key]);
-        }
-      }
-
-      if (!$tokens) {
-        throw new PhutilSearchQueryCompilerSyntaxException(
-          pht(
-            'All of your search terms are too short or too common to '.
-            'appear in the search index. Search for longer or more '.
-            'distinctive terms.'));
-      }
-
-      $queries = array();
-      $queries[] = $compiler->compileLiteralQuery($tokens);
-      $queries[] = $compiler->compileStemmedQuery($tokens);
-      $compiled_query = implode(' ', array_filter($queries));
-    } else {
-      $compiled_query = null;
-    }
-
-    if (strlen($compiled_query)) {
-      $select[] = qsprintf(
-        $conn,
-        'IF(field.field = %s, %d, 0) +
-          MATCH(corpus, stemmedCorpus) AGAINST (%s IN BOOLEAN MODE)
-            AS fieldScore',
-        $title_field,
-        $title_boost,
-        $compiled_query);
-
-      $join[] = qsprintf(
-        $conn,
-        '%T field ON field.phid = document.phid',
-        $field_table);
-
-      $where[] = qsprintf(
-        $conn,
-        'MATCH(corpus, stemmedCorpus) AGAINST (%s IN BOOLEAN MODE)',
-        $compiled_query);
-
-      if ($query->getParameter('field')) {
-        $where[] = qsprintf(
-          $conn,
-          'field.field = %s',
-          $field);
-      }
-    } else {
-      $select[] = qsprintf(
-        $conn,
-        'document.documentCreated AS fieldScore');
-    }
-
-    $exclude = $query->getParameter('exclude');
-    if ($exclude) {
-      $where[] = qsprintf(
-        $conn,
-        'document.phid != %s',
-        $exclude);
-    }
-
-    $types = $query->getParameter('types');
-    if ($types) {
-      if (strlen($compiled_query)) {
-        $where[] = qsprintf(
-          $conn,
-          'field.phidType IN (%Ls)',
-          $types);
-      }
-
-      $where[] = qsprintf(
-        $conn,
-        'document.documentType IN (%Ls)',
-        $types);
-    }
-
-    $join[] = $this->joinRelationship(
-      $conn,
-      $query,
-      'authorPHIDs',
-      PhabricatorSearchRelationship::RELATIONSHIP_AUTHOR);
-
-    $statuses = $query->getParameter('statuses', array());
-    $statuses = array_fuse($statuses);
-    $open_rel = PhabricatorSearchRelationship::RELATIONSHIP_OPEN;
-    $closed_rel = PhabricatorSearchRelationship::RELATIONSHIP_CLOSED;
-    $include_open = !empty($statuses[$open_rel]);
-    $include_closed = !empty($statuses[$closed_rel]);
-
-    if ($include_open && !$include_closed) {
-      $join[] = $this->joinRelationship(
-        $conn,
-        $query,
-        'statuses',
-        $open_rel,
-        true);
-    } else if ($include_closed && !$include_open) {
-      $join[] = $this->joinRelationship(
-        $conn,
-        $query,
-        'statuses',
-        $closed_rel,
-        true);
-    }
-
-    if ($query->getParameter('withAnyOwner')) {
-      $join[] = $this->joinRelationship(
-        $conn,
-        $query,
-        'withAnyOwner',
-        PhabricatorSearchRelationship::RELATIONSHIP_OWNER,
-        true);
-    } else if ($query->getParameter('withUnowned')) {
-      $join[] = $this->joinRelationship(
-        $conn,
-        $query,
-        'withUnowned',
-        PhabricatorSearchRelationship::RELATIONSHIP_UNOWNED,
-        true);
-    } else {
-      $join[] = $this->joinRelationship(
-        $conn,
-        $query,
-        'ownerPHIDs',
-        PhabricatorSearchRelationship::RELATIONSHIP_OWNER);
-    }
-
-    $join[] = $this->joinRelationship(
-      $conn,
-      $query,
-      'subscriberPHIDs',
-      PhabricatorSearchRelationship::RELATIONSHIP_SUBSCRIBER);
-
-    $join[] = $this->joinRelationship(
-      $conn,
-      $query,
-      'projectPHIDs',
-      PhabricatorSearchRelationship::RELATIONSHIP_PROJECT);
-
-    $join[] = $this->joinRelationship(
-      $conn,
-      $query,
-      'repository',
-      PhabricatorSearchRelationship::RELATIONSHIP_REPOSITORY);
-
-    $select = implode(', ', $select);
-
-    $join = array_filter($join);
-    foreach ($join as $key => $clause) {
-      $join[$key] = ' JOIN '.$clause;
-    }
-    $join = implode(' ', $join);
-
-    if ($where) {
-      $where = 'WHERE '.implode(' AND ', $where);
-    } else {
-      $where = '';
-    }
-
-    if (strlen($compiled_query)) {
-      $order = '';
-    } else {
-      // When not executing a query, order by document creation date. This
-      // is the default view in object browser dialogs, like "Close Duplicate".
-      $order = qsprintf(
-        $conn,
-        'ORDER BY document.documentCreated DESC');
-    }
-
-    return qsprintf(
-      $conn,
-      'SELECT %Q FROM %T document %Q %Q %Q LIMIT 1000',
-      $select,
-      $document_table,
-      $join,
-      $where,
-      $order);
-  }
-
-  protected function joinRelationship(
-    AphrontDatabaseConnection $conn,
-    PhabricatorSavedQuery $query,
-    $field,
-    $type,
-    $is_existence = false) {
-
-    $sql = qsprintf(
-      $conn,
-      '%T AS %C ON %C.phid = document.phid AND %C.relation = %s',
-      id(new PhabricatorSearchDocumentRelationship())->getTableName(),
-      $field,
-      $field,
-      $field,
-      $type);
-
-    if (!$is_existence) {
-      $phids = $query->getParameter($field, array());
-      if (!$phids) {
-        return null;
-      }
-      $sql .= qsprintf(
-        $conn,
-        ' AND %C.relatedPHID in (%Ls)',
-        $field,
-        $phids);
-    }
-
-    return $sql;
-  }
-
-  public function indexExists() {
-    return true;
-  }
-
-  public function getIndexStats() {
-    return false;
-  }
-
-  public function getFulltextTokens() {
-    return $this->fulltextTokens;
-  }
-
-  private function getEngineLimits(AphrontDatabaseConnection $conn) {
-    if ($this->engineLimits === null) {
-      $this->engineLimits = $this->newEngineLimits($conn);
-    }
-    return $this->engineLimits;
-  }
-
-  private function newEngineLimits(AphrontDatabaseConnection $conn) {
-    // First, try InnoDB. Some database may not have both table engines, so
-    // selecting variables from missing table engines can fail and throw.
-
-    try {
-      $result = queryfx_one(
-        $conn,
-        'SELECT @@innodb_ft_min_token_size innodb_max,
-          @@innodb_ft_server_stopword_table innodb_stopword_config');
-    } catch (AphrontQueryException $ex) {
-      $result = null;
-    }
-
-    if ($result) {
-      $min_len = $result['innodb_max'];
-
-      $stopword_config = $result['innodb_stopword_config'];
-      if (preg_match('(/)', $stopword_config)) {
-        // If the setting is nonempty and contains a slash, query the
-        // table the user has configured.
-        $parts = explode('/', $stopword_config);
-        list($stopword_database, $stopword_table) = $parts;
-      } else {
-        // Otherwise, query the InnoDB default stopword table.
-        $stopword_database = 'INFORMATION_SCHEMA';
-        $stopword_table = 'INNODB_FT_DEFAULT_STOPWORD';
-      }
-
-      $stopwords = queryfx_all(
-        $conn,
-        'SELECT * FROM %T.%T',
-        $stopword_database,
-        $stopword_table);
-      $stopwords = ipull($stopwords, 'value');
-      $stopwords = array_fuse($stopwords);
-
-      return array($min_len, $stopwords);
-    }
-
-    // If InnoDB fails, try MyISAM.
-    $result = queryfx_one(
-      $conn,
-      'SELECT
-        @@ft_min_word_len myisam_max,
-        @@ft_stopword_file myisam_stopwords');
-
-    $min_len = $result['myisam_max'];
-
-    $file = $result['myisam_stopwords'];
-    if (preg_match('(/resources/sql/stopwords\.txt\z)', $file)) {
-      // If this is set to something that looks like the Phabricator
-      // stopword file, read that.
-      $file = 'stopwords.txt';
-    } else {
-      // Otherwise, just use the default stopwords. This might be wrong
-      // but we can't read the actual value dynamically and reading
-      // whatever file the variable is set to could be a big headache
-      // to get right from a security perspective.
-      $file = 'stopwords_myisam.txt';
-    }
-
-    $root = dirname(phutil_get_library_root('phabricator'));
-    $data = Filesystem::readFile($root.'/resources/sql/'.$file);
-    $stopwords = explode("\n", $data);
-    $stopwords = array_filter($stopwords);
-    $stopwords = array_fuse($stopwords);
-
-    return array($min_len, $stopwords);
-  }
-
-  private function isShortToken($value, $min_length) {
-    // NOTE: The engine tokenizes internally on periods, so terms in the form
-    // "ab.cd", where short substrings are separated by periods, do not produce
-    // any queryable tokens. These terms are meaningful if at least one
-    // substring is longer than the minimum length, like "example.py". See
-    // T12928. This also applies to words with intermediate apostrophes, like
-    // "to's".
-
-    $parts = preg_split('/[.\']+/', $value);
-
-    foreach ($parts as $part) {
-      if (phutil_utf8_strlen($part) >= $min_length) {
-        return false;
-      }
-    }
-
-    return true;
-  }
-
-}