add yandex metrika
diff --git a/404.html b/404.html
index 3246bde..cb8206a 100644
--- a/404.html
+++ b/404.html
@@ -32,7 +32,29 @@
     <link rel="icon" type="image/png" href="/img/favicon.png" />
   </head>
   <body>
-    <!-- MOBILE MENU START -->
+    <!-- Yandex.Metrika counter -->
+    <script type="text/javascript">
+      (function (m, e, t, r, i, k, a) {
+        m[i] =
+          m[i] ||
+          function () {
+            (m[i].a = m[i].a || []).push(arguments);
+          };
+        m[i].l = 1 * new Date();
+        (k = e.createElement(t)), (a = e.getElementsByTagName(t)[0]), (k.async = 1), (k.src = r), a.parentNode.insertBefore(k, a);
+      })(window, document, 'script', 'https://mc.yandex.ru/metrika/tag.js', 'ym');
+
+      ym(72949126, 'init', {
+        clickmap: true,
+        trackLinks: true,
+        accurateTrackBounce: true,
+        webvisor: true,
+      });
+    </script>
+    <noscript
+      ><div><img src="https://mc.yandex.ru/watch/72949126" style="position: absolute; left: -9999px" alt="" /></div
+    ></noscript>
+    <!-- /Yandex.Metrika counter --><!-- MOBILE MENU START -->
     <div class="hystmodal" id="jsMenuModal" aria-hidden="true">
       <div class="hystmodal__wrap">
         <div class="hystmodal__window mobmenu" role="dialog" aria-modal="true">
@@ -149,7 +171,7 @@
         <nav class="hdrmenu">
           <ul class="flexi">
             <li class="js-hasdrop"><a class="hdrmenu--expanded" href="/" data-panel="getStarted">Get Started</a></li>
-            <li class="js-hasdrop"><a class="hdrmenu__current hdrmenu--expanded" href="/features" data-panel="features">Features</a></li>
+            <li class="js-hasdrop"><a class="hdrmenu--expanded" href="/features" data-panel="features">Features</a></li>
             <li class="js-hasdrop"><a class="hdrmenu--expanded" href="/community.html" data-panel="community">Community</a></li>
             <li><a href="/use-cases/provenusecases.html" data-panel="">Powered By</a></li>
             <li><a href="///ignite.apache.org/docs/latest/" data-panel="">Docs</a></li>
diff --git a/_src/_components/base.pug b/_src/_components/base.pug
index 5c250e5..57dd3ae 100644
--- a/_src/_components/base.pug
+++ b/_src/_components/base.pug
@@ -14,6 +14,7 @@
         link(rel="icon", type="image/png", href="/img/favicon.png")
         
     body
+        include ./counters.html
         block main
 
         include ./footer.pug
diff --git a/_src/_components/counters.html b/_src/_components/counters.html
new file mode 100644
index 0000000..5153a99
--- /dev/null
+++ b/_src/_components/counters.html
@@ -0,0 +1,15 @@
+<!-- Yandex.Metrika counter -->
+<script type="text/javascript" >
+    (function(m,e,t,r,i,k,a){m[i]=m[i]||function(){(m[i].a=m[i].a||[]).push(arguments)};
+    m[i].l=1*new Date();k=e.createElement(t),a=e.getElementsByTagName(t)[0],k.async=1,k.src=r,a.parentNode.insertBefore(k,a)})
+    (window, document, "script", "https://mc.yandex.ru/metrika/tag.js", "ym");
+  
+    ym(72949126, "init", {
+         clickmap:true,
+         trackLinks:true,
+         accurateTrackBounce:true,
+         webvisor:true
+    });
+  </script>
+  <noscript><div><img src="https://mc.yandex.ru/watch/72949126" style="position:absolute; left:-9999px;" alt="" /></div></noscript>
+  <!-- /Yandex.Metrika counter -->
\ No newline at end of file
diff --git a/arch/clustering.html b/arch/clustering.html
index 9992f0b..03a6c5b 100644
--- a/arch/clustering.html
+++ b/arch/clustering.html
@@ -13,7 +13,29 @@
     <link rel="icon" type="image/png" href="/img/favicon.png" />
   </head>
   <body>
-    <!-- MOBILE MENU START -->
+    <!-- Yandex.Metrika counter -->
+    <script type="text/javascript">
+      (function (m, e, t, r, i, k, a) {
+        m[i] =
+          m[i] ||
+          function () {
+            (m[i].a = m[i].a || []).push(arguments);
+          };
+        m[i].l = 1 * new Date();
+        (k = e.createElement(t)), (a = e.getElementsByTagName(t)[0]), (k.async = 1), (k.src = r), a.parentNode.insertBefore(k, a);
+      })(window, document, 'script', 'https://mc.yandex.ru/metrika/tag.js', 'ym');
+
+      ym(72949126, 'init', {
+        clickmap: true,
+        trackLinks: true,
+        accurateTrackBounce: true,
+        webvisor: true,
+      });
+    </script>
+    <noscript
+      ><div><img src="https://mc.yandex.ru/watch/72949126" style="position: absolute; left: -9999px" alt="" /></div
+    ></noscript>
+    <!-- /Yandex.Metrika counter --><!-- MOBILE MENU START -->
     <div class="hystmodal" id="jsMenuModal" aria-hidden="true">
       <div class="hystmodal__wrap">
         <div class="hystmodal__window mobmenu" role="dialog" aria-modal="true">
diff --git a/arch/multi-tier-storage.html b/arch/multi-tier-storage.html
index 3f54651..f039549 100644
--- a/arch/multi-tier-storage.html
+++ b/arch/multi-tier-storage.html
@@ -26,7 +26,29 @@
     <link rel="icon" type="image/png" href="/img/favicon.png" />
   </head>
   <body>
-    <!-- MOBILE MENU START -->
+    <!-- Yandex.Metrika counter -->
+    <script type="text/javascript">
+      (function (m, e, t, r, i, k, a) {
+        m[i] =
+          m[i] ||
+          function () {
+            (m[i].a = m[i].a || []).push(arguments);
+          };
+        m[i].l = 1 * new Date();
+        (k = e.createElement(t)), (a = e.getElementsByTagName(t)[0]), (k.async = 1), (k.src = r), a.parentNode.insertBefore(k, a);
+      })(window, document, 'script', 'https://mc.yandex.ru/metrika/tag.js', 'ym');
+
+      ym(72949126, 'init', {
+        clickmap: true,
+        trackLinks: true,
+        accurateTrackBounce: true,
+        webvisor: true,
+      });
+    </script>
+    <noscript
+      ><div><img src="https://mc.yandex.ru/watch/72949126" style="position: absolute; left: -9999px" alt="" /></div
+    ></noscript>
+    <!-- /Yandex.Metrika counter --><!-- MOBILE MENU START -->
     <div class="hystmodal" id="jsMenuModal" aria-hidden="true">
       <div class="hystmodal__wrap">
         <div class="hystmodal__window mobmenu" role="dialog" aria-modal="true">
diff --git a/arch/native-persistence.html b/arch/native-persistence.html
index 4df6b57..920f07f 100644
--- a/arch/native-persistence.html
+++ b/arch/native-persistence.html
@@ -25,7 +25,29 @@
     <link rel="icon" type="image/png" href="/img/favicon.png" />
   </head>
   <body>
-    <!-- MOBILE MENU START -->
+    <!-- Yandex.Metrika counter -->
+    <script type="text/javascript">
+      (function (m, e, t, r, i, k, a) {
+        m[i] =
+          m[i] ||
+          function () {
+            (m[i].a = m[i].a || []).push(arguments);
+          };
+        m[i].l = 1 * new Date();
+        (k = e.createElement(t)), (a = e.getElementsByTagName(t)[0]), (k.async = 1), (k.src = r), a.parentNode.insertBefore(k, a);
+      })(window, document, 'script', 'https://mc.yandex.ru/metrika/tag.js', 'ym');
+
+      ym(72949126, 'init', {
+        clickmap: true,
+        trackLinks: true,
+        accurateTrackBounce: true,
+        webvisor: true,
+      });
+    </script>
+    <noscript
+      ><div><img src="https://mc.yandex.ru/watch/72949126" style="position: absolute; left: -9999px" alt="" /></div
+    ></noscript>
+    <!-- /Yandex.Metrika counter --><!-- MOBILE MENU START -->
     <div class="hystmodal" id="jsMenuModal" aria-hidden="true">
       <div class="hystmodal__wrap">
         <div class="hystmodal__window mobmenu" role="dialog" aria-modal="true">
diff --git a/community.html b/community.html
index 396452d..fb70df4 100644
--- a/community.html
+++ b/community.html
@@ -19,7 +19,29 @@
     <link rel="icon" type="image/png" href="/img/favicon.png" />
   </head>
   <body>
-    <!-- MOBILE MENU START -->
+    <!-- Yandex.Metrika counter -->
+    <script type="text/javascript">
+      (function (m, e, t, r, i, k, a) {
+        m[i] =
+          m[i] ||
+          function () {
+            (m[i].a = m[i].a || []).push(arguments);
+          };
+        m[i].l = 1 * new Date();
+        (k = e.createElement(t)), (a = e.getElementsByTagName(t)[0]), (k.async = 1), (k.src = r), a.parentNode.insertBefore(k, a);
+      })(window, document, 'script', 'https://mc.yandex.ru/metrika/tag.js', 'ym');
+
+      ym(72949126, 'init', {
+        clickmap: true,
+        trackLinks: true,
+        accurateTrackBounce: true,
+        webvisor: true,
+      });
+    </script>
+    <noscript
+      ><div><img src="https://mc.yandex.ru/watch/72949126" style="position: absolute; left: -9999px" alt="" /></div
+    ></noscript>
+    <!-- /Yandex.Metrika counter --><!-- MOBILE MENU START -->
     <div class="hystmodal" id="jsMenuModal" aria-hidden="true">
       <div class="hystmodal__wrap">
         <div class="hystmodal__window mobmenu" role="dialog" aria-modal="true">
diff --git a/download.html b/download.html
index 8f80f0c..ff9614e 100644
--- a/download.html
+++ b/download.html
@@ -24,7 +24,29 @@
     <link rel="icon" type="image/png" href="/img/favicon.png" />
   </head>
   <body>
-    <!-- MOBILE MENU START -->
+    <!-- Yandex.Metrika counter -->
+    <script type="text/javascript">
+      (function (m, e, t, r, i, k, a) {
+        m[i] =
+          m[i] ||
+          function () {
+            (m[i].a = m[i].a || []).push(arguments);
+          };
+        m[i].l = 1 * new Date();
+        (k = e.createElement(t)), (a = e.getElementsByTagName(t)[0]), (k.async = 1), (k.src = r), a.parentNode.insertBefore(k, a);
+      })(window, document, 'script', 'https://mc.yandex.ru/metrika/tag.js', 'ym');
+
+      ym(72949126, 'init', {
+        clickmap: true,
+        trackLinks: true,
+        accurateTrackBounce: true,
+        webvisor: true,
+      });
+    </script>
+    <noscript
+      ><div><img src="https://mc.yandex.ru/watch/72949126" style="position: absolute; left: -9999px" alt="" /></div
+    ></noscript>
+    <!-- /Yandex.Metrika counter --><!-- MOBILE MENU START -->
     <div class="hystmodal" id="jsMenuModal" aria-hidden="true">
       <div class="hystmodal__wrap">
         <div class="hystmodal__window mobmenu" role="dialog" aria-modal="true">
diff --git a/events.html b/events.html
index 7bda5d3..950a922 100644
--- a/events.html
+++ b/events.html
@@ -19,7 +19,29 @@
     <link rel="icon" type="image/png" href="/img/favicon.png" />
   </head>
   <body>
-    <!-- MOBILE MENU START -->
+    <!-- Yandex.Metrika counter -->
+    <script type="text/javascript">
+      (function (m, e, t, r, i, k, a) {
+        m[i] =
+          m[i] ||
+          function () {
+            (m[i].a = m[i].a || []).push(arguments);
+          };
+        m[i].l = 1 * new Date();
+        (k = e.createElement(t)), (a = e.getElementsByTagName(t)[0]), (k.async = 1), (k.src = r), a.parentNode.insertBefore(k, a);
+      })(window, document, 'script', 'https://mc.yandex.ru/metrika/tag.js', 'ym');
+
+      ym(72949126, 'init', {
+        clickmap: true,
+        trackLinks: true,
+        accurateTrackBounce: true,
+        webvisor: true,
+      });
+    </script>
+    <noscript
+      ><div><img src="https://mc.yandex.ru/watch/72949126" style="position: absolute; left: -9999px" alt="" /></div
+    ></noscript>
+    <!-- /Yandex.Metrika counter --><!-- MOBILE MENU START -->
     <div class="hystmodal" id="jsMenuModal" aria-hidden="true">
       <div class="hystmodal__wrap">
         <div class="hystmodal__window mobmenu" role="dialog" aria-modal="true">
diff --git a/faq.html b/faq.html
index 7122186..a368d55 100644
--- a/faq.html
+++ b/faq.html
@@ -20,7 +20,29 @@
     <link rel="icon" type="image/png" href="/img/favicon.png" />
   </head>
   <body>
-    <!-- MOBILE MENU START -->
+    <!-- Yandex.Metrika counter -->
+    <script type="text/javascript">
+      (function (m, e, t, r, i, k, a) {
+        m[i] =
+          m[i] ||
+          function () {
+            (m[i].a = m[i].a || []).push(arguments);
+          };
+        m[i].l = 1 * new Date();
+        (k = e.createElement(t)), (a = e.getElementsByTagName(t)[0]), (k.async = 1), (k.src = r), a.parentNode.insertBefore(k, a);
+      })(window, document, 'script', 'https://mc.yandex.ru/metrika/tag.js', 'ym');
+
+      ym(72949126, 'init', {
+        clickmap: true,
+        trackLinks: true,
+        accurateTrackBounce: true,
+        webvisor: true,
+      });
+    </script>
+    <noscript
+      ><div><img src="https://mc.yandex.ru/watch/72949126" style="position: absolute; left: -9999px" alt="" /></div
+    ></noscript>
+    <!-- /Yandex.Metrika counter --><!-- MOBILE MENU START -->
     <div class="hystmodal" id="jsMenuModal" aria-hidden="true">
       <div class="hystmodal__wrap">
         <div class="hystmodal__window mobmenu" role="dialog" aria-modal="true">
diff --git a/features/acid-transactions.html b/features/acid-transactions.html
index b8b37b3..1dd805a 100644
--- a/features/acid-transactions.html
+++ b/features/acid-transactions.html
@@ -26,7 +26,29 @@
     <link rel="icon" type="image/png" href="/img/favicon.png" />
   </head>
   <body>
-    <!-- MOBILE MENU START -->
+    <!-- Yandex.Metrika counter -->
+    <script type="text/javascript">
+      (function (m, e, t, r, i, k, a) {
+        m[i] =
+          m[i] ||
+          function () {
+            (m[i].a = m[i].a || []).push(arguments);
+          };
+        m[i].l = 1 * new Date();
+        (k = e.createElement(t)), (a = e.getElementsByTagName(t)[0]), (k.async = 1), (k.src = r), a.parentNode.insertBefore(k, a);
+      })(window, document, 'script', 'https://mc.yandex.ru/metrika/tag.js', 'ym');
+
+      ym(72949126, 'init', {
+        clickmap: true,
+        trackLinks: true,
+        accurateTrackBounce: true,
+        webvisor: true,
+      });
+    </script>
+    <noscript
+      ><div><img src="https://mc.yandex.ru/watch/72949126" style="position: absolute; left: -9999px" alt="" /></div
+    ></noscript>
+    <!-- /Yandex.Metrika counter --><!-- MOBILE MENU START -->
     <div class="hystmodal" id="jsMenuModal" aria-hidden="true">
       <div class="hystmodal__wrap">
         <div class="hystmodal__window mobmenu" role="dialog" aria-modal="true">
diff --git a/features/compute-apis.html b/features/compute-apis.html
index 0ccf744..38687ec 100644
--- a/features/compute-apis.html
+++ b/features/compute-apis.html
@@ -25,7 +25,29 @@
     <link rel="icon" type="image/png" href="/img/favicon.png" />
   </head>
   <body>
-    <!-- MOBILE MENU START -->
+    <!-- Yandex.Metrika counter -->
+    <script type="text/javascript">
+      (function (m, e, t, r, i, k, a) {
+        m[i] =
+          m[i] ||
+          function () {
+            (m[i].a = m[i].a || []).push(arguments);
+          };
+        m[i].l = 1 * new Date();
+        (k = e.createElement(t)), (a = e.getElementsByTagName(t)[0]), (k.async = 1), (k.src = r), a.parentNode.insertBefore(k, a);
+      })(window, document, 'script', 'https://mc.yandex.ru/metrika/tag.js', 'ym');
+
+      ym(72949126, 'init', {
+        clickmap: true,
+        trackLinks: true,
+        accurateTrackBounce: true,
+        webvisor: true,
+      });
+    </script>
+    <noscript
+      ><div><img src="https://mc.yandex.ru/watch/72949126" style="position: absolute; left: -9999px" alt="" /></div
+    ></noscript>
+    <!-- /Yandex.Metrika counter --><!-- MOBILE MENU START -->
     <div class="hystmodal" id="jsMenuModal" aria-hidden="true">
       <div class="hystmodal__wrap">
         <div class="hystmodal__window mobmenu" role="dialog" aria-modal="true">
diff --git a/features/index.html b/features/index.html
index e43d585..9e4beda 100644
--- a/features/index.html
+++ b/features/index.html
@@ -19,7 +19,29 @@
     <link rel="icon" type="image/png" href="/img/favicon.png" />
   </head>
   <body>
-    <!-- MOBILE MENU START -->
+    <!-- Yandex.Metrika counter -->
+    <script type="text/javascript">
+      (function (m, e, t, r, i, k, a) {
+        m[i] =
+          m[i] ||
+          function () {
+            (m[i].a = m[i].a || []).push(arguments);
+          };
+        m[i].l = 1 * new Date();
+        (k = e.createElement(t)), (a = e.getElementsByTagName(t)[0]), (k.async = 1), (k.src = r), a.parentNode.insertBefore(k, a);
+      })(window, document, 'script', 'https://mc.yandex.ru/metrika/tag.js', 'ym');
+
+      ym(72949126, 'init', {
+        clickmap: true,
+        trackLinks: true,
+        accurateTrackBounce: true,
+        webvisor: true,
+      });
+    </script>
+    <noscript
+      ><div><img src="https://mc.yandex.ru/watch/72949126" style="position: absolute; left: -9999px" alt="" /></div
+    ></noscript>
+    <!-- /Yandex.Metrika counter --><!-- MOBILE MENU START -->
     <div class="hystmodal" id="jsMenuModal" aria-hidden="true">
       <div class="hystmodal__wrap">
         <div class="hystmodal__window mobmenu" role="dialog" aria-modal="true">
diff --git a/features/key-value-apis.html b/features/key-value-apis.html
index 27eb167..2e55cb6 100644
--- a/features/key-value-apis.html
+++ b/features/key-value-apis.html
@@ -26,7 +26,29 @@
     <link rel="icon" type="image/png" href="/img/favicon.png" />
   </head>
   <body>
-    <!-- MOBILE MENU START -->
+    <!-- Yandex.Metrika counter -->
+    <script type="text/javascript">
+      (function (m, e, t, r, i, k, a) {
+        m[i] =
+          m[i] ||
+          function () {
+            (m[i].a = m[i].a || []).push(arguments);
+          };
+        m[i].l = 1 * new Date();
+        (k = e.createElement(t)), (a = e.getElementsByTagName(t)[0]), (k.async = 1), (k.src = r), a.parentNode.insertBefore(k, a);
+      })(window, document, 'script', 'https://mc.yandex.ru/metrika/tag.js', 'ym');
+
+      ym(72949126, 'init', {
+        clickmap: true,
+        trackLinks: true,
+        accurateTrackBounce: true,
+        webvisor: true,
+      });
+    </script>
+    <noscript
+      ><div><img src="https://mc.yandex.ru/watch/72949126" style="position: absolute; left: -9999px" alt="" /></div
+    ></noscript>
+    <!-- /Yandex.Metrika counter --><!-- MOBILE MENU START -->
     <div class="hystmodal" id="jsMenuModal" aria-hidden="true">
       <div class="hystmodal__wrap">
         <div class="hystmodal__window mobmenu" role="dialog" aria-modal="true">
diff --git a/features/machinelearning.html b/features/machinelearning.html
index 5752b7c..1a13a89 100644
--- a/features/machinelearning.html
+++ b/features/machinelearning.html
@@ -27,7 +27,29 @@
     <link rel="icon" type="image/png" href="/img/favicon.png" />
   </head>
   <body>
-    <!-- MOBILE MENU START -->
+    <!-- Yandex.Metrika counter -->
+    <script type="text/javascript">
+      (function (m, e, t, r, i, k, a) {
+        m[i] =
+          m[i] ||
+          function () {
+            (m[i].a = m[i].a || []).push(arguments);
+          };
+        m[i].l = 1 * new Date();
+        (k = e.createElement(t)), (a = e.getElementsByTagName(t)[0]), (k.async = 1), (k.src = r), a.parentNode.insertBefore(k, a);
+      })(window, document, 'script', 'https://mc.yandex.ru/metrika/tag.js', 'ym');
+
+      ym(72949126, 'init', {
+        clickmap: true,
+        trackLinks: true,
+        accurateTrackBounce: true,
+        webvisor: true,
+      });
+    </script>
+    <noscript
+      ><div><img src="https://mc.yandex.ru/watch/72949126" style="position: absolute; left: -9999px" alt="" /></div
+    ></noscript>
+    <!-- /Yandex.Metrika counter --><!-- MOBILE MENU START -->
     <div class="hystmodal" id="jsMenuModal" aria-hidden="true">
       <div class="hystmodal__wrap">
         <div class="hystmodal__window mobmenu" role="dialog" aria-modal="true">
diff --git a/features/multilanguage.html b/features/multilanguage.html
index 17401ef..3474410 100644
--- a/features/multilanguage.html
+++ b/features/multilanguage.html
@@ -14,7 +14,29 @@
     <link rel="icon" type="image/png" href="/img/favicon.png" />
   </head>
   <body>
-    <!-- MOBILE MENU START -->
+    <!-- Yandex.Metrika counter -->
+    <script type="text/javascript">
+      (function (m, e, t, r, i, k, a) {
+        m[i] =
+          m[i] ||
+          function () {
+            (m[i].a = m[i].a || []).push(arguments);
+          };
+        m[i].l = 1 * new Date();
+        (k = e.createElement(t)), (a = e.getElementsByTagName(t)[0]), (k.async = 1), (k.src = r), a.parentNode.insertBefore(k, a);
+      })(window, document, 'script', 'https://mc.yandex.ru/metrika/tag.js', 'ym');
+
+      ym(72949126, 'init', {
+        clickmap: true,
+        trackLinks: true,
+        accurateTrackBounce: true,
+        webvisor: true,
+      });
+    </script>
+    <noscript
+      ><div><img src="https://mc.yandex.ru/watch/72949126" style="position: absolute; left: -9999px" alt="" /></div
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diff --git a/use-cases/spark-acceleration.html b/use-cases/spark-acceleration.html
index d527305..e8fdf06 100644
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