Archive for the ‘DBInputFomat Locking issue’ Category

MapReduce – DBInputFormat – Serialization on readers

Июль 20th, 2010
Last week I was working on EC2 MySQL server where one of the slave is taking lot of time to catch-up; and only job that is running on that server is mapreduce job to access InnoDB tables for read-only meta data. And debugging it further, noticed that every access to database server is serialized with [...]
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