Site Map
- Lester Martin
Owned by Lester Martin
A directory tree view of all the pages on this wiki.
All blog posts; most recent first.
Blog Posts
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moving my tech blog (already missing confluence)
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Dec 18, 2020
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hive delta file compaction (minor and major)
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Dec 23, 2019
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hive acid transactions with partitions (a behind the scenes perspective)
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Dec 22, 2019
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viewing the content of ORC files (using the Java ORC tool jar)
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Dec 12, 2019
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topology supervision features of streaming frameworks (or lack thereof)
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Mar 21, 2019
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are partially-written hdfs files accessible? (not exactly, but much more yes than I previously thought)
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Mar 21, 2019
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use spark to calculate salary statistics for georgia educators (the fourth book of the trilogy)
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Mar 09, 2019
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building a c# storm topology (yes, it is a jvm-based framework)
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Jun 23, 2018
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learning something new every day (seems hdfs is not as immutable as i thought)
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Oct 03, 2017
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accepting "best answer" on hcc (it is the ~right~ thing to do)
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Apr 10, 2017
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NoClassDefFoundError for Log4jLoggerFactory on hdp 2.5.3 when running the KafkaSpout in your topology? (how's that for a title?)
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Mar 10, 2017
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initial hbase grants on a new secure hadoop cluster (without ranger)
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Mar 04, 2017
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opening up a port on centos 7 firewall (using firewalld)
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Mar 02, 2017
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my talk at devnexus (links to video and preso)
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Feb 26, 2017
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why you should be a supporting "member" of oss (hey, it works for npr)
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Dec 28, 2016
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how to counteract ageism? (maintain relevance!)
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Dec 28, 2016
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don't be in such a hurry to change your job (the suck continuum explained)
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Oct 20, 2016
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the agile manifesto (it is still a good idea)
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Aug 12, 2016
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joining multiple datasets with pig (i/o courtesy of hcatloader & hcatstorer)
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Aug 08, 2016
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storing dynamically created file names with pig (piggbank's multistorage to the rescue)
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Jul 26, 2016
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unboxing my new little box (my first intel nuc)
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Jun 01, 2016
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why spark's mapPartitions transformation is faster than map (calls your function once/partition, not once/element)
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May 19, 2016
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performing a non-root ambari install (with hortonworks admin 1 course)
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Apr 19, 2016
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need an overview of hadoop? (i need some reviewers)
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Mar 17, 2016
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some "mandatory" training really is MANDATORY (termination threat is a clue)
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Feb 04, 2016
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novel thoughts on national pride (ask not...)
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Jan 14, 2016
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never try (well... if you employer doesn't value you or your opinion)
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Jan 12, 2016
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authoring presentations with markdown (deckset gets you pretty far)
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Dec 09, 2015
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viewing diffs between powerpoint decks (with a little help from adobe)
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Oct 16, 2015
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transitioned to training (and loving it)
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Oct 15, 2015
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hadoop mount points (more art than science)
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Sept 02, 2015
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trying out hive testbench on hdp sandbox (and packaging it up for deployment elsewhere)
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Jul 07, 2015
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installing hdp 2.2 with ambari 2.0 (moving to the amazon cloud)
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Jun 30, 2015
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presenting at hadoop summit (archiving evolving databases in hive)
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Jun 11, 2015
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installing hdp 2.2 with ambari 2.0 (moving to the azure cloud)
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May 06, 2015
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connecting dbvisualizer to hive (running on hdp 2.2)
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Apr 10, 2015
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got a hadoop question? (then ask lester!)
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Mar 28, 2015
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took the pig/hive test (got a shiny new certificate)
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Mar 28, 2015
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declaring work is beneath you (probably not the best course of action)
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Feb 25, 2015
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os patching your hadoop cluster (pre & post rolling upgrades)
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Feb 13, 2015
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parameterizing mapred.* properties (cli vs oozie)
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Feb 05, 2015
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hadoop mini smoke test (VERY mini)
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Jan 10, 2015
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a lightning quick tutorial on pdsh (for when you need to run the same command on many machines)
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Jan 09, 2015
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help me go to belgium (not asking for money, just a couple of votes)
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Jan 08, 2015
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improving datanode resiliency (it's all about the settings)
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Dec 02, 2014
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simple hadoop cluster user provisioning process (simple = w/o pam or kerberos)
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Nov 24, 2014
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hadoop worker node configuration recommendations (1-2-10)
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Nov 13, 2014
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a patent for the "idea" of ingesting data into hadoop (is it really "sponge worthy"?)
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Oct 17, 2014
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changes to hive's decimal datatype (it could cost you lots of pennies)
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Oct 15, 2014
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stinger.next to the rescue (but you do have stinger.NOW tuning options available, well, "now")
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Oct 10, 2014
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a robust set of hadoop master nodes (it is hard to swing it with two machines)
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Sept 15, 2014
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obtained hortonworks' apache hadoop administrator certification (finally)
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Sept 05, 2014
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hadoop security (it's all about layering)
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Aug 25, 2014
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hadoop superuser (you can have more than 'hdfs')
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Aug 13, 2014
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hadoop demystified presentation (with atlanta's .net user group)
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Jul 30, 2014
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hadoop streaming with .net map reduce api (executing on hdp for windows)
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Jul 28, 2014
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installing hdp on windows (and then running something on it)
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Jul 23, 2014
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small files and hadoop's hdfs (bonus: an inode formula)
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Jul 11, 2014
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volvo thinks like me (they've got two of my mantras covered)
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Jun 17, 2014
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setting up hdp 2.1 with non-standard users for hadoop services (why not use a non-standard user for ambari, too)
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May 07, 2014
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using your mac to install a virtualized hadoop cluster? (then setup a local repo on it)
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May 06, 2014
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use hive to calculate salary statistics for georgia educators (third of a three-part series)
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Apr 30, 2014
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use pig to calculate salary statistics for georgia educators (second of a three-part series)
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Apr 30, 2014
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use mapreduce to calculate salary statistics for georgia educators (first of a three-part series)
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Apr 30, 2014
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hadoop component versions by distributions (the open source ones)
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Apr 29, 2014
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feeling a bit prolific (or maybe i'm just a smart aleck)
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Apr 14, 2014
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manually installing hue (on my virtualized 5-node cluster)
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Apr 08, 2014
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create and share a hive udf (the cli is your friend)
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Mar 29, 2014
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create and share a pig udf (anyone can do it)
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Mar 29, 2014
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stopping oozie from limiting the number of reducers on your hive action (just add some more xml)
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Mar 20, 2014
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how do i load a fixed-width formatted file into hive? (with a little help from pig)
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Mar 06, 2014
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visiting the computer history museum (yes, i'm a geek)
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Mar 01, 2014
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confluence column width hack (where have you been!?!?)
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Jan 30, 2014
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what's after the hortonworks sandbox? (a 5-node cluster!)
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Jan 20, 2014
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building a virtualized 5-node HDP 2.0 cluster (all within a mac)
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Jan 19, 2014
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disruptive possibilities (the rise of platform architecture)
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Dec 30, 2013
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foxtrot and java (it still cracks me up)
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Dec 18, 2013
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hadoop world 2013 (reflections from nyc)
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Nov 05, 2013
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sometimes the pig walks to slaughter because he knows it is better for the farmer (or the team)
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Oct 24, 2013
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too big to ignore (too boring to read)
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Oct 23, 2013
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cat herding (bringing together information, ideas, and technologies)
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Oct 09, 2013
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agile = more meetings? (wtf!)
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Oct 03, 2013
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taking sides (finally)
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Aug 22, 2013
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scaled agile framework (please share your experiences)
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Aug 12, 2013
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fancy yourself a data scientist? (then show me the money!)
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Aug 08, 2013
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fruITion and recrEAtion (a double-header book review)
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Jul 07, 2013
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hadoop yarn (in a nutshell)
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Jun 27, 2013
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just reboot it (when was that ever a good idea?)
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Jun 19, 2013
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assholes and prima donnas (you need a few)
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Jun 03, 2013
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i'm a certified hadoop developer (so, what does that mean?)
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Apr 11, 2013
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hey, i'm here for you (but, you need to show up)
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Apr 09, 2013
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published again (well… not really…)
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Mar 24, 2013
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what the world needs now is another nosql preso (like i need a hole in my head)
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Feb 07, 2013
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do we really have bugs? (did he really ask that?)
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Feb 03, 2013
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how projects really start (it's all about the money)
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Jan 27, 2013
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leadership principles (shouldn't the rangers know?)
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Jan 03, 2013
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generalizing specialists (or is it specializing generalists?)
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Dec 20, 2012
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we need collaborators (not a chief collaboration officer)
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Dec 03, 2012
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emailing manifestos (just don't do it)
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Nov 28, 2012
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lucky (it doesn't mean privileged)
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Nov 26, 2012
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are you a mort, elvis or einstein (or are these labels nonsense)?
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Nov 20, 2012
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enterprise 2.0 book review (using web 2.0 technologies within organizations)
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Nov 18, 2012
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give as few orders as possible (encourage autonomy and responsibility)
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Nov 03, 2012