diff --git a/pages/students/2016/jan_holp/dp2021/dp2021 zdrojove subory/cassandra.js b/pages/students/2016/jan_holp/dp2021/dp2021 zdrojove subory/cassandra.js
deleted file mode 100644
index 75a78afd83..0000000000
--- a/pages/students/2016/jan_holp/dp2021/dp2021 zdrojove subory/cassandra.js	
+++ /dev/null
@@ -1,111 +0,0 @@
-//Jan Holp, DP 2021
-
-
-//client2 = cassandra
-//client1  = elasticsearch 
-//-----------------------------------------------------------------
-
-//require the Elasticsearch librray
-const elasticsearch = require('elasticsearch');
-const client1 = new elasticsearch.Client({
-   hosts: [ 'localhost:9200']
-});
-client1.ping({
-     requestTimeout: 30000,
- }, function(error) {
- // at this point, eastic search is down, please check your Elasticsearch service
-     if (error) {
-         console.error('Elasticsearch cluster is down!');
-     } else {
-         console.log('ELasticSearch is ok');
-     }
- });
-
-//create new index skweb2
-client1.indices.create({
-    index: 'skweb2'
-}, function(error, response, status) {
-    if (error) {
-        console.log(error);
-    } else {
-        console.log("created a new index", response);
-    }
-});
-
-//indexing method
-const bulkIndex = function bulkIndex(index, type, data) {
-	let bulkBody = [];
-	 id = 1;
-const errorCount = 0;
-/// dsdgfdhdhgdjd
-	data.forEach(item => {
-		bulkBody.push({
-			index: {
-				_index: index,
-				_type:  type,
-				_id :   id++, // id zmenit na url 
-			}
-		});
-		bulkBody.push(item);
-	});
-       // console.log(bulkBody);
-	client1.bulk({body: bulkBody})
-		.then(response => {
-
-			response.items.forEach(item => {
-				if (item.index && item.index.error) {
-					console.log(++errorCount, item.index.error);
-				}
-			});
-			console.log(
-				`Successfully indexed ${data.length - errorCount}
-				out of ${data.length} items`
-			);
-		})
-		.catch(console.err);
-};
-
-
-const cassandra = require('cassandra-driver');
-const client2 = new cassandra.Client({ contactPoints: ['localhost:9042'], localDataCenter: 'datacenter1', keyspace: 'websucker' });
-const query1 = 'SELECT domain_name FROM websucker.domain_quality WHERE good_count > 0 ALLOW FILTERING';
-//const query2 = 'SELECT * from websucker.content WHERE domain_name = ' + domain_name[i] + 'ALLOW FILTERING'; // body_size > 0
-
-//-------------------------------------------------------------------------
-
-var domain_name = [];
-var object_list = [];
-
-
-client2.execute(query1)
-  .then(result => {
-  		let pole = result.rows.map(r => {
-  			domain_name.push(r.domain_name)
-  		});
-  		console.log("Vsetky domenove mena : " , domain_name);
- 	domain_name.forEach(name => {
-			let query = 'SELECT * from websucker.content WHERE domain_name = ' + "'" + name + "'" + ' and body_size > 0 ALLOW FILTERING';
-			client2.execute(query).then( res => {
-				res.rows.map(rr => {
-					object_list.push({
-					 domain_name: rr.domain_name,
-					 title: rr.title,
-					 body: rr.body,
-					 target_link : rr.target_link,
-					 id : rr.target_link 
-					 });
-					 //console.log(object_list);
-					 bulkIndex('skweb2', 'web_page', object_list);
-					 //console.log(object_list);
-				});
-
-			}).catch(error => console.log(error));
-})
-
-}).catch(err => console.log(err));
- 
-setTimeout(() => console.log(object_list, 15000));
-
-
-
-