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In previous blog we covered hardware [...]
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Daemons Before going deeper into [...]
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Big Data has become a buzzword these days. A lot [...]
Tech Tips for Developers – Q&A
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Intermediate data is not written in hdfs but in local disk.
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If all replicas of one or more blocks of a file become unavailable, a file is considered corrupt and any attempt to access this file will [...]
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Hadoop stores data in form of blocks. A block is replicated across the cluster as per the replicationFactor which is 3 by default. Default [...]
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one easy way to differentiate between Hadoop old api and new api is packages. old api packages are identifiable by mapred or to put it [...]
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delete from Users where (rowid, email_adress) not in (select min(rowid), email_adress from Users group by email_address);
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