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The "NameNode" page has been changed by GridEngine: http://wiki.apache.org/hadoop/NameNode?action=diff&rev1=8&rev2=9 Comment: be specific It is essential to look after the NameNode. Here are some recommendations from production use * Use a good server with lots of RAM. The more RAM you have, the bigger the file system, or the smaller the block size. - * Use ECC RAM. + * Use ECC RAM. - * On Java6u15 or later, run the server VM with compressed pointers {{{-XX:+UseCompressedOops}}} to cut your heap size down. + * On Java6u15 or later, run the server VM with compressed pointers {{{-XX:+UseCompressedOops}}} to cut the JVM heap size down. * List more than one name node directory in the configuration, so that multiple copies of the file system meta-data will be stored. As long as the directories are on separate disks, a single disk failure will not corrupt the meta-data. * Configure the NameNode to store one set of transaction logs on a separate disk from the image. * Configure the NameNode to store another set of transaction logs to a network mounted disk.
