diff --git a/resources/sql/autopatches/20170313.reviewers.01.sql b/resources/sql/autopatches/20170313.reviewers.01.sql
new file mode 100644
--- /dev/null
+++ b/resources/sql/autopatches/20170313.reviewers.01.sql
@@ -0,0 +1,9 @@
+CREATE TABLE {$NAMESPACE}_differential.differential_reviewer (
+  id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  revisionPHID VARBINARY(64) NOT NULL,
+  reviewerPHID VARBINARY(64) NOT NULL,
+  reviewerStatus VARCHAR(64) NOT NULL COLLATE {$COLLATE_TEXT},
+  dateCreated INT UNSIGNED NOT NULL,
+  dateModified INT UNSIGNED NOT NULL,
+  UNIQUE KEY `key_revision` (revisionPHID, reviewerPHID)
+) ENGINE=InnoDB, COLLATE {$COLLATE_TEXT};
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
@@ -491,6 +491,7 @@
     'DifferentialRevertPlanCommitMessageField' => 'applications/differential/field/DifferentialRevertPlanCommitMessageField.php',
     'DifferentialRevertPlanField' => 'applications/differential/customfield/DifferentialRevertPlanField.php',
     'DifferentialReviewedByCommitMessageField' => 'applications/differential/field/DifferentialReviewedByCommitMessageField.php',
+    'DifferentialReviewer' => 'applications/differential/storage/DifferentialReviewer.php',
     'DifferentialReviewerDatasource' => 'applications/differential/typeahead/DifferentialReviewerDatasource.php',
     'DifferentialReviewerForRevisionEdgeType' => 'applications/differential/edge/DifferentialReviewerForRevisionEdgeType.php',
     'DifferentialReviewerProxy' => 'applications/differential/storage/DifferentialReviewerProxy.php',
@@ -5247,6 +5248,7 @@
     'DifferentialRevertPlanCommitMessageField' => 'DifferentialCommitMessageCustomField',
     'DifferentialRevertPlanField' => 'DifferentialStoredCustomField',
     'DifferentialReviewedByCommitMessageField' => 'DifferentialCommitMessageField',
+    'DifferentialReviewer' => 'DifferentialDAO',
     'DifferentialReviewerDatasource' => 'PhabricatorTypeaheadCompositeDatasource',
     'DifferentialReviewerForRevisionEdgeType' => 'PhabricatorEdgeType',
     'DifferentialReviewerProxy' => 'Phobject',
diff --git a/src/applications/differential/storage/DifferentialReviewer.php b/src/applications/differential/storage/DifferentialReviewer.php
new file mode 100644
--- /dev/null
+++ b/src/applications/differential/storage/DifferentialReviewer.php
@@ -0,0 +1,24 @@
+<?php
+
+final class DifferentialReviewer
+  extends DifferentialDAO {
+
+  protected $revisionPHID;
+  protected $reviewerPHID;
+  protected $reviewerStatus;
+
+  protected function getConfiguration() {
+    return array(
+      self::CONFIG_COLUMN_SCHEMA => array(
+        'reviewerStatus' => 'text64',
+      ),
+      self::CONFIG_KEY_SCHEMA => array(
+        'key_revision' => array(
+          'columns' => array('revisionPHID', 'reviewerPHID'),
+          'unique' => true,
+        ),
+      ),
+    ) + parent::getConfiguration();
+  }
+
+}
diff --git a/src/applications/differential/xaction/DifferentialRevisionReviewTransaction.php b/src/applications/differential/xaction/DifferentialRevisionReviewTransaction.php
--- a/src/applications/differential/xaction/DifferentialRevisionReviewTransaction.php
+++ b/src/applications/differential/xaction/DifferentialRevisionReviewTransaction.php
@@ -116,6 +116,9 @@
       );
     }
 
+    // This is currently double-writing: to the old (edge) store and the new
+    // (reviewer) store. Do the old edge write first.
+
     $src_phid = $revision->getPHID();
     $edge_type = DifferentialRevisionHasReviewerEdgeType::EDGECONST;
 
@@ -131,6 +134,42 @@
     }
 
     $editor->save();
+
+    // Now, do the new write.
+
+    if ($map) {
+      $table = new DifferentialReviewer();
+
+      $reviewers = $table->loadAllWhere(
+        'revisionPHID = %s AND reviewerPHID IN (%Ls)',
+        $src_phid,
+        array_keys($map));
+      $reviewers = mpull($reviewers, null, 'getReviewerPHID');
+
+      foreach ($map as $dst_phid => $edge_data) {
+        $reviewer = idx($reviewers, $dst_phid);
+        if (!$reviewer) {
+          $reviewer = id(new DifferentialReviewer())
+            ->setRevisionPHID($src_phid)
+            ->setReviewerPHID($dst_phid);
+        }
+
+        $reviewer->setReviewerStatus($status);
+
+        if ($status == DifferentialReviewerStatus::STATUS_RESIGNED) {
+          if ($reviewer->getID()) {
+            $reviewer->delete();
+          }
+        } else {
+          try {
+            $reviewer->save();
+          } catch (AphrontDuplicateKeyQueryException $ex) {
+            // At least for now, just ignore it if we lost a race.
+          }
+        }
+      }
+    }
+
   }
 
 }
diff --git a/src/applications/differential/xaction/DifferentialRevisionReviewersTransaction.php b/src/applications/differential/xaction/DifferentialRevisionReviewersTransaction.php
--- a/src/applications/differential/xaction/DifferentialRevisionReviewersTransaction.php
+++ b/src/applications/differential/xaction/DifferentialRevisionReviewersTransaction.php
@@ -106,6 +106,9 @@
   public function applyExternalEffects($object, $value) {
     $src_phid = $object->getPHID();
 
+    // This is currently double-writing: to the old (edge) store and the new
+    // (reviewer) store. Do the old edge write first.
+
     $old = $this->generateOldValue($object);
     $new = $value;
     $edge_type = DifferentialRevisionHasReviewerEdgeType::EDGECONST;
@@ -138,6 +141,51 @@
     }
 
     $editor->save();
+
+    // Now, do the new write.
+
+    $table = new DifferentialReviewer();
+    $table_name = $table->getTableName();
+    $conn = $table->establishConnection('w');
+
+    if ($rem) {
+      queryfx(
+        $conn,
+        'DELETE FROM %T WHERE revisionPHID = %s AND reviewerPHID IN (%Ls)',
+        $table_name,
+        $src_phid,
+        array_keys($rem));
+    }
+
+    if ($new) {
+      $reviewers = $table->loadAllWhere(
+        'revisionPHID = %s AND reviewerPHID IN (%Ls)',
+        $src_phid,
+        array_keys($new));
+      $reviewers = mpull($reviewers, null, 'getReviewerPHID');
+
+      foreach ($new as $dst_phid => $status) {
+        $old_status = idx($old, $dst_phid);
+        if ($old_status === $status) {
+          continue;
+        }
+
+        $reviewer = idx($reviewers, $dst_phid);
+        if (!$reviewer) {
+          $reviewer = id(new DifferentialReviewer())
+            ->setRevisionPHID($src_phid)
+            ->setReviewerPHID($dst_phid);
+        }
+
+        $reviewer->setReviewerStatus($status);
+
+        try {
+          $reviewer->save();
+        } catch (AphrontDuplicateKeyQueryException $ex) {
+          // At least for now, just ignore it if we lost a race.
+        }
+      }
+    }
   }
 
   public function getTitle() {