How to programatically enable sharding for a database and then shard the collection using node.js mongodb driver? -

-

मेरे पास निम्न नोडजे स्क्रिप्ट है जो वर्तमान में कुछ परीक्षण डेटाबेस बनाता है और फिर एक संग्रह बनाता है और संग्रह में एक नमूना प्रविष्टि सम्मिलित करता है । अब मैं डेटाबेस के लिए कंजिंग को सक्षम करना चाहूंगा और फिर हैशड id क्षेत्र के आधार पर संग्रह को ढंक कर दूंगा। मैं ऐसा कैसे कर सकता हूं?

कोड बिंदु में होस्ट और बंदरगाह जहां मौंगोस चल रहा है। 

  Var मोंगो क्लाइंट = आवश्यक ('मोंगोड')। मोंगो क्लाइंट; Var name = "sampledb"; फ़ंक्शन प्रारंभ () {for (var i = 4; i & lt; 20; ++ i) {var dbname = name + i; MongoClient.connect ("mongodb: //" + host + ":" + port + "/" + dbname, फ़ंक्शन (गलती, डीबी) {if (err) {console.log ("db से कनेक्ट करने में त्रुटि"); प्रक्रिया .exit (0);} db.createCollection ("संदेश", फ़ंक्शन (err_, result_) {if (err_) {console.log ("संग्रह बनाने में त्रुटि"); process.exit (0);} db.collection ("संदेश")। ({"Id": "& lt; random id & gt;"}, {w: 0}, फ़ंक्शन (गलती, परिणाम) {if (err) {console.log ("दस्तावेज़ सम्मिलित नहीं किया जा सकता" );} Else {console.log ("सफलतापूर्वक डाला गया दस्तावेज़");}}); // अब बनाए गए संग्रह को ढंक दिया गया}};}); } }  प्रारंभ();

मुझे अपने प्रश्न के लिए उचित दस्तावेज नहीं मिल सका, कोई कृपया मेरी मदद कर सकता है ... धन्यवाद।


Comments

Post a Comment

Popular posts from this blog

java - Can't add JTree to JPanel of a JInternalFrame -

-
Image
There are two panels in my JInternalframe. I want to add TopPanel to Jtree to nominate another. But I can not add Jaitari to the top of the panel. Please help me in this piece of code: DefaultMutableTreeNode root = new DefaultMutableTreeNode ("deck"); DefaultMutableTreeNode Item Clubs = New DefaultMutableTreeNode ("Club"); AddAllCard (itemClubs); Root.add (itemClubs); DefaultMutableTreeNode item = New DefaultMutableTreeNode ("Diamonds"); AddAllCard (itemDiamonds); Root.add (itemDiamonds); DefaultMutableTreeNode Itemspads = New DefaultMutableTreeNode ("Spades"); AddAllCard (itemSpades); Root.add (itemSpades); DefaultMutableTreeNode item increases = new DefaultMutableTreeNode ("heart"); AddAllCard (itemHearts); Root.add (itemHearts); Default Trimodel Tree Model = New DefaultTreeModel (Route); Tree = new jetty (tree modal); ScrollPane = new JScrollPane (tree); // scrollPane.setViewportView (tree); . ScrollPane.getViewport () add (tr
Read more

javascript - data.match(var) not working it seems -

-
OK, I have this small block code, which is to scanned a number on the website, but for some reason There is a hip that it is not scanning at all. var regenges = / \ & lt; Span class = "currency-robux" data-to-"item-private-value-price" & gt; ([\ D,]) \ & LT; \ / Span \ & gt; /; Var ValueCiling = Data. Match (reggae); Value-song = number (value slicing location (",", "")); Is there anything wrong with that? This is related to the if statement if (value sling and lieutenant; = price watching) { < P> A function calls to move from there, but for some reason it does not seem to run at all. So I think the Regex is wrong but I'm not sure how. (There is a variable in PriceWinking , this is a snippet from the code.) On the website, I'm trying to remove it. & lt; Span class = "robux" data-plus = "item-privatesale-price" & gt; 115 & lt; / Span & gt; Keep in mind
Read more

javascript - How can I pause a jQuery .each() loop, while waiting for user input? -

-
Before I continue to get a jQuery .each loop to wait for user input There is a problem in repeatedly repeating This is my code (I have commented on what I would like to do): & lt; Html xmlns = "http://www.w3.org/1999/xhtml" & gt; & Lt; Top & gt; & Lt; Link rel = "stylesheet" type = "text / css" href = "common_components.css" /> & Lt; Meta http-equiv = "content-type" content = "text / html; charset = UTF-8" /> & Lt; Link rel = "stylesheet" href = "slider.css" & gt; & Lt ;? Php include_once 'common_components.php'; $ Query = $ dbh- & gt; Queries ("SELECT movies_dir FROM settings"); $ Line = $ query- & gt; Obtain (PDO :: FETCH_ASSOC); Date_default_timezone_set ('UTC'); Echo "& lt; title & gt; movie scanner & lt; / title & gt;"; ? & Gt; & Lt; Script src = "jquery.min.js" & gt; &am
Read more