mirror of
https://github.com/alanorth/cgspace-notes.git
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255 lines
9.2 KiB
HTML
255 lines
9.2 KiB
HTML
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<html lang="en">
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<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
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<meta property="og:title" content="August, 2017" />
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<meta property="og:description" content="2017-08-01
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Linode sent an alert that CGSpace (linode18) was using 350% CPU for the past two hours
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I looked in the Activity pane of the Admin Control Panel and it seems that Google, Baidu, Yahoo, and Bing are all crawling with massive numbers of bots concurrently (~100 total, mostly Baidu and Google)
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The good thing is that, according to dspace.log.2017-08-01, they are all using the same Tomcat session
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This means our Tomcat Crawler Session Valve is working
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But many of the bots are browsing dynamic URLs like:
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/handle/10568/3353/discover
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/handle/10568/16510/browse
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The robots.txt only blocks the top-level /discover and /browse URLs… we will need to find a way to forbid them from accessing these!
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Relevant issue from DSpace Jira (semi resolved in DSpace 6.0): https://jira.duraspace.org/browse/DS-2962
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It turns out that we’re already adding the X-Robots-Tag "none" HTTP header, but this only forbids the search engine from indexing the page, not crawling it!
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Also, the bot has to successfully browse the page first so it can receive the HTTP header…
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We might actually have to block these requests with HTTP 403 depending on the user agent
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Abenet pointed out that the CGIAR Library Historical Archive collection I sent July 20th only had ~100 entries, instead of 2415
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This was due to newline characters in the dc.description.abstract column, which caused OpenRefine to choke when exporting the CSV
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I exported a new CSV from the collection on DSpace Test and then manually removed the characters in vim using g/^$/d
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Then I cleaned up the author authorities and HTML characters in OpenRefine and sent the file back to Abenet
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" />
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<meta property="og:type" content="article" />
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<meta property="og:url" content="https://alanorth.github.io/cgspace-notes/2017-08/" />
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<meta property="article:published_time" content="2017-08-01T11:51:52+03:00"/>
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<meta property="article:modified_time" content="2017-08-01T12:03:37+03:00"/>
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<meta name="twitter:card" content="summary"/>
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<meta name="twitter:text:title" content="August, 2017"/>
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<meta name="twitter:title" content="August, 2017"/>
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<meta name="twitter:description" content="2017-08-01
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Linode sent an alert that CGSpace (linode18) was using 350% CPU for the past two hours
|
|
I looked in the Activity pane of the Admin Control Panel and it seems that Google, Baidu, Yahoo, and Bing are all crawling with massive numbers of bots concurrently (~100 total, mostly Baidu and Google)
|
|
The good thing is that, according to dspace.log.2017-08-01, they are all using the same Tomcat session
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This means our Tomcat Crawler Session Valve is working
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But many of the bots are browsing dynamic URLs like:
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/handle/10568/3353/discover
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/handle/10568/16510/browse
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|
|
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The robots.txt only blocks the top-level /discover and /browse URLs… we will need to find a way to forbid them from accessing these!
|
|
Relevant issue from DSpace Jira (semi resolved in DSpace 6.0): https://jira.duraspace.org/browse/DS-2962
|
|
It turns out that we’re already adding the X-Robots-Tag "none" HTTP header, but this only forbids the search engine from indexing the page, not crawling it!
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Also, the bot has to successfully browse the page first so it can receive the HTTP header…
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We might actually have to block these requests with HTTP 403 depending on the user agent
|
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Abenet pointed out that the CGIAR Library Historical Archive collection I sent July 20th only had ~100 entries, instead of 2415
|
|
This was due to newline characters in the dc.description.abstract column, which caused OpenRefine to choke when exporting the CSV
|
|
I exported a new CSV from the collection on DSpace Test and then manually removed the characters in vim using g/^$/d
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Then I cleaned up the author authorities and HTML characters in OpenRefine and sent the file back to Abenet
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"/>
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<meta name="generator" content="Hugo 0.25.1" />
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<script type="application/ld+json">
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{
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"@context": "http://schema.org",
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"@type": "BlogPosting",
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"headline": "August, 2017",
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"url": "https://alanorth.github.io/cgspace-notes/2017-08/",
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"wordCount": "262",
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"datePublished": "2017-08-01T11:51:52+03:00",
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"dateModified": "2017-08-01T12:03:37+03:00",
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"author": {
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"@type": "Person",
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"name": "Alan Orth"
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},
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"keywords": "Notes"
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}
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</script>
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<link rel="canonical" href="https://alanorth.github.io/cgspace-notes/2017-08/">
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<title>August, 2017 | CGSpace Notes</title>
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<!-- combined, minified CSS -->
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<link href="https://alanorth.github.io/cgspace-notes/css/style.css" rel="stylesheet" integrity="sha384-j3n8sYdzztDYtVc80KiiuOXoCg5Bjz0zYyLGzDMW8RbfA0u5djbF0GO3bVOPoLyN" crossorigin="anonymous">
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</head>
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<body>
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<div class="blog-masthead">
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<div class="container">
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<nav class="nav blog-nav">
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<a class="nav-link " href="https://alanorth.github.io/cgspace-notes/">Home</a>
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</nav>
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</div>
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</div>
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<header class="blog-header">
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<div class="container">
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<h1 class="blog-title"><a href="https://alanorth.github.io/cgspace-notes/" rel="home">CGSpace Notes</a></h1>
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<p class="lead blog-description">Documenting day-to-day work on the <a href="https://cgspace.cgiar.org">CGSpace</a> repository.</p>
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</div>
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</header>
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<div class="container">
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<div class="row">
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<div class="col-sm-8 blog-main">
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<article class="blog-post">
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<header>
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<h2 class="blog-post-title"><a href="https://alanorth.github.io/cgspace-notes/2017-08/">August, 2017</a></h2>
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<p class="blog-post-meta"><time datetime="2017-08-01T11:51:52+03:00">Tue Aug 01, 2017</time> by Alan Orth in
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<i class="fa fa-tag" aria-hidden="true"></i> <a href="/cgspace-notes/tags/notes" rel="tag">Notes</a>
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</p>
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</header>
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<h2 id="2017-08-01">2017-08-01</h2>
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<ul>
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<li>Linode sent an alert that CGSpace (linode18) was using 350% CPU for the past two hours</li>
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<li>I looked in the Activity pane of the Admin Control Panel and it seems that Google, Baidu, Yahoo, and Bing are all crawling with massive numbers of bots concurrently (~100 total, mostly Baidu and Google)</li>
|
|
<li>The good thing is that, according to <code>dspace.log.2017-08-01</code>, they are all using the same Tomcat session</li>
|
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<li>This means our Tomcat Crawler Session Valve is working</li>
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<li>But many of the bots are browsing dynamic URLs like:
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<ul>
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<li>/handle/10568/3353/discover</li>
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<li>/handle/10568/16510/browse</li>
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</ul></li>
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<li>The <code>robots.txt</code> only blocks the top-level <code>/discover</code> and <code>/browse</code> URLs… we will need to find a way to forbid them from accessing these!</li>
|
|
<li>Relevant issue from DSpace Jira (semi resolved in DSpace 6.0): <a href="https://jira.duraspace.org/browse/DS-2962">https://jira.duraspace.org/browse/DS-2962</a></li>
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<li>It turns out that we’re already adding the <code>X-Robots-Tag "none"</code> HTTP header, but this only forbids the search engine from <em>indexing</em> the page, not crawling it!</li>
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<li>Also, the bot has to successfully browse the page first so it can receive the HTTP header…</li>
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<li>We might actually have to <em>block</em> these requests with HTTP 403 depending on the user agent</li>
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<li>Abenet pointed out that the CGIAR Library Historical Archive collection I sent July 20th only had ~100 entries, instead of 2415</li>
|
|
<li>This was due to newline characters in the <code>dc.description.abstract</code> column, which caused OpenRefine to choke when exporting the CSV</li>
|
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<li>I exported a new CSV from the collection on DSpace Test and then manually removed the characters in vim using <code>g/^$/d</code></li>
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<li>Then I cleaned up the author authorities and HTML characters in OpenRefine and sent the file back to Abenet</li>
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</ul>
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<p></p>
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</article>
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</div> <!-- /.blog-main -->
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<aside class="col-sm-3 offset-sm-1 blog-sidebar">
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<section class="sidebar-module">
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<h4>Recent Posts</h4>
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<ol class="list-unstyled">
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<li><a href="/cgspace-notes/2017-08/">August, 2017</a></li>
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<li><a href="/cgspace-notes/2017-07/">July, 2017</a></li>
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<li><a href="/cgspace-notes/2017-06/">June, 2017</a></li>
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<li><a href="/cgspace-notes/2017-05/">May, 2017</a></li>
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<li><a href="/cgspace-notes/2017-04/">April, 2017</a></li>
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</ol>
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</section>
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<section class="sidebar-module">
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<h4>Links</h4>
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<ol class="list-unstyled">
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<li><a href="https://cgspace.cgiar.org">CGSpace</a></li>
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<li><a href="https://dspacetest.cgiar.org">DSpace Test</a></li>
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<li><a href="https://github.com/ilri/DSpace">CGSpace @ GitHub</a></li>
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</ol>
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</section>
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</aside>
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</div> <!-- /.row -->
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</div> <!-- /.container -->
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<footer class="blog-footer">
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<p>
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Blog template created by <a href="https://twitter.com/mdo">@mdo</a>, ported to Hugo by <a href='https://twitter.com/mralanorth'>@mralanorth</a>.
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</p>
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<p>
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<a href="#">Back to top</a>
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</html>
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