{"id":10836,"date":"2014-08-22T08:27:35","date_gmt":"2014-08-22T08:27:35","guid":{"rendered":"http:\/\/www.recantha.co.uk\/blog\/?p=10836"},"modified":"2014-08-22T08:27:35","modified_gmt":"2014-08-22T08:27:35","slug":"multi-datacenter-cassandra-on-32-raspberry-pis","status":"publish","type":"post","link":"https:\/\/www.recantha.co.uk\/blog\/?p=10836","title":{"rendered":"Multi-Datacenter Cassandra on 32 Raspberry Pi\u2019s"},"content":{"rendered":"<p><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"https:\/\/i0.wp.com\/www.datastax.com\/wp-content\/uploads\/2014\/08\/cluster_closeup_final-700x461.jpg?resize=560%2C369\" alt=\"\" width=\"560\" height=\"369\" \/><\/p>\n<p>Brandon Van Ryswyk and Daniel Chin have just finished building a\u00a0<span style=\"color: #4b4b4b;\">32-node <a href=\"http:\/\/www.datastax.com\/\" target=\"_blank\">DataStax<\/a> Enterprise cluster running on Raspberry Pis. It&#8217;s being used to demonstrate the fault-tolerant nature of <a href=\"http:\/\/cassandra.apache.org\/\" target=\"_blank\">Cassandra<\/a> by letting visitors to their lobby take down a &#8216;data centre&#8217; with a touch of a big red button. Cassandra is a database platform used in a lot of &#8216;big data&#8217; applications.\u00a0<a href=\"http:\/\/www.datastax.com\/dev\/blog\/32-node-raspberry-pi-cassandra-cluster\" target=\"_blank\">You can read a lot more detail about the project on their website<\/a>.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Brandon Van Ryswyk and Daniel Chin have just finished building a\u00a032-node DataStax Enterprise cluster running on Raspberry Pis. It&#8217;s being used to demonstrate the fault-tolerant nature of Cassandra by letting visitors to their lobby take down a &#8216;data centre&#8217; with&hellip;<\/p>\n<p class=\"more-link-p\"><a class=\"more-link\" href=\"https:\/\/www.recantha.co.uk\/blog\/?p=10836\">Read more &rarr;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[14,22,50,39],"tags":[],"class_list":["post-10836","post","type-post","status-publish","format-standard","hentry","category-databases","category-geeky-techiness","category-making","category-programming"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Multi-Datacenter Cassandra on 32 Raspberry Pi\u2019s - Raspberry Pi Pod<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.recantha.co.uk\/blog\/?p=10836\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Multi-Datacenter Cassandra on 32 Raspberry Pi\u2019s - Raspberry Pi Pod\" \/>\n<meta property=\"og:description\" content=\"Brandon Van Ryswyk and Daniel Chin have just finished building a\u00a032-node DataStax Enterprise cluster running on Raspberry Pis. It&#8217;s being used to demonstrate the fault-tolerant nature of Cassandra by letting visitors to their lobby take down a &#8216;data centre&#8217; with&hellip;Read more &rarr;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.recantha.co.uk\/blog\/?p=10836\" \/>\n<meta property=\"og:site_name\" content=\"Raspberry Pi Pod\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/recantha\/\" \/>\n<meta property=\"article:published_time\" content=\"2014-08-22T08:27:35+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/www.datastax.com\/wp-content\/uploads\/2014\/08\/cluster_closeup_final-700x461.jpg\" \/>\n<meta name=\"author\" content=\"Michael Horne\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@recantha\" \/>\n<meta name=\"twitter:site\" content=\"@recantha\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Michael Horne\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.recantha.co.uk\/blog\/?p=10836#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.recantha.co.uk\/blog\/?p=10836\"},\"author\":{\"name\":\"Michael Horne\",\"@id\":\"https:\/\/www.recantha.co.uk\/blog\/#\/schema\/person\/c27c4ef2ee1c18b130f1fcd5dcdbb263\"},\"headline\":\"Multi-Datacenter Cassandra on 32 Raspberry Pi\u2019s\",\"datePublished\":\"2014-08-22T08:27:35+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.recantha.co.uk\/blog\/?p=10836\"},\"wordCount\":81,\"commentCount\":1,\"publisher\":{\"@id\":\"https:\/\/www.recantha.co.uk\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.recantha.co.uk\/blog\/?p=10836#primaryimage\"},\"thumbnailUrl\":\"http:\/\/www.datastax.com\/wp-content\/uploads\/2014\/08\/cluster_closeup_final-700x461.jpg\",\"articleSection\":[\"Databases\",\"Geeky Techiness\",\"Making\",\"Programming\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.recantha.co.uk\/blog\/?p=10836#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.recantha.co.uk\/blog\/?p=10836\",\"url\":\"https:\/\/www.recantha.co.uk\/blog\/?p=10836\",\"name\":\"Multi-Datacenter Cassandra on 32 Raspberry Pi\u2019s - 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This can be seen in the video below. Of course, this isn't a full-fledged benchmark as only one insert is being done at a time, but the concept is sound. Read more\u2026","rel":"","context":"In &quot;Databases&quot;","block_context":{"text":"Databases","link":"https:\/\/www.recantha.co.uk\/blog\/?cat=14"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1603,"url":"https:\/\/www.recantha.co.uk\/blog\/?p=1603","url_meta":{"origin":10836,"position":1},"title":"RFM12Pi #RaspberryPi Expansion board kit (433 Mhz)","author":"Michael Horne","date":"29 January 2013","format":false,"excerpt":"\u00a0 With the addition of a 433Mhz RFM12Pi expansion board to receive data via wireless from other OpenEnergyMonitor modules (e.g emonTx) a Raspberry Pi running emoncms\u00a0can be used as a powerful emonBase base-station to log, process and visualise energy, temperature and other environmental data. Data can be logged locally to\u2026","rel":"","context":"In &quot;Accessories&quot;","block_context":{"text":"Accessories","link":"https:\/\/www.recantha.co.uk\/blog\/?cat=54"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":12376,"url":"https:\/\/www.recantha.co.uk\/blog\/?p=12376","url_meta":{"origin":10836,"position":2},"title":"Hook a Maplin weather station up to a Raspberry Pi","author":"Michael Horne","date":"12 April 2015","format":false,"excerpt":"Dave Akerman has taken a Maplin weather station\u00a0and hooked it up to his Raspberry Pi. He used a piece of software with the oh-so-catchy name of \"pywws\" to read in the data from USB and then uploaded his data to wunderground.com. Read more here.","rel":"","context":"In &quot;Nature&quot;","block_context":{"text":"Nature","link":"https:\/\/www.recantha.co.uk\/blog\/?cat=70"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/images.maplinmedia.co.uk\/black-usb-wireless-touchscreen-weather-centre.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":11003,"url":"https:\/\/www.recantha.co.uk\/blog\/?p=11003","url_meta":{"origin":10836,"position":3},"title":"Professor uses Raspberry Pi as part of an earthquake early-warning system","author":"Michael Horne","date":"14 September 2014","format":false,"excerpt":"Berkeley professor Joshua Bloom is part of the beta-testing team for ShakeAlert, an earthquake early warning system. He has used a Raspberry Pi to tap into the data source of the system to provide him with a 5-second warning should a large earthquake occur. You can read more here. The\u2026","rel":"","context":"In &quot;Geeky Techiness&quot;","block_context":{"text":"Geeky Techiness","link":"https:\/\/www.recantha.co.uk\/blog\/?cat=22"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.berkeleyside.com\/wp-content\/uploads\/2014\/09\/Earthquake-alarm-720x960.png?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.berkeleyside.com\/wp-content\/uploads\/2014\/09\/Earthquake-alarm-720x960.png?resize=350%2C200 1x, https:\/\/i0.wp.com\/www.berkeleyside.com\/wp-content\/uploads\/2014\/09\/Earthquake-alarm-720x960.png?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.berkeleyside.com\/wp-content\/uploads\/2014\/09\/Earthquake-alarm-720x960.png?resize=700%2C400 2x"},"classes":[]},{"id":17639,"url":"https:\/\/www.recantha.co.uk\/blog\/?p=17639","url_meta":{"origin":10836,"position":4},"title":"Human brain on the internet &#8211; the Brainternet is here &#8211; Raspberry Pi used to visualise brain data","author":"Michael Horne","date":"26 September 2017","format":false,"excerpt":"Adam Pantanowitz and a team from the Wits School of Electrical and Information Engineering\u00a0in Johannesburg have put the data from a human brain on the Internet for the first time.\u00a0Using an Emotiv EEG device (pictured), they collect EEG (electroencephalogram) data with a Raspberry Pi and then live stream the data\u2026","rel":"","context":"In &quot;Internet of things&quot;","block_context":{"text":"Internet of things","link":"https:\/\/www.recantha.co.uk\/blog\/?cat=26"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2017\/09\/brainternet.jpg?fit=1200%2C800&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2017\/09\/brainternet.jpg?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2017\/09\/brainternet.jpg?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2017\/09\/brainternet.jpg?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2017\/09\/brainternet.jpg?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":15382,"url":"https:\/\/www.recantha.co.uk\/blog\/?p=15382","url_meta":{"origin":10836,"position":5},"title":"Build a Hadoop cluster with Apache Spark on YARN with Raspberry Pis","author":"Michael Horne","date":"1 September 2016","format":false,"excerpt":"PK over at DQYDJ has written an excellent tutorial on creating a Raspberry Pi cluster and then installing Hadoop and some other software to do word analysis using the power\u00a0of that cluster. It's a really good example of big data analysis and how the Pi can be used to show\u2026","rel":"","context":"In &quot;Big Data&quot;","block_context":{"text":"Big Data","link":"https:\/\/www.recantha.co.uk\/blog\/?cat=72"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/dqydj.com\/wp-content\/uploads\/2016\/08\/IMG_9132.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/dqydj.com\/wp-content\/uploads\/2016\/08\/IMG_9132.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/dqydj.com\/wp-content\/uploads\/2016\/08\/IMG_9132.png?resize=525%2C300&ssl=1 1.5x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/10836","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10836"}],"version-history":[{"count":1,"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/10836\/revisions"}],"predecessor-version":[{"id":10837,"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/10836\/revisions\/10837"}],"wp:attachment":[{"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10836"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10836"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.recantha.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}