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Posted to common-user@hadoop.apache.org by labtrax <hi...@gmx.de> on 2011/04/21 09:53:50 UTC

namenode recovery and hbase

Hello,

in "Pro Hadoop" (Jason Venner, 2009) is written that assuming my namenode crashes all not written blocks are lost. But that there is (might be) a sync feature in 0.20 (p. 120) to avoid this lost. 
Whats about this feature? Do you know if is existent? And might it be the feature which is only enabled in the "branch-0.20-append" version? Describe here: 1.3.1.2 http://hbase.apache.org/book/notsoquick.html and which seems to be mandatory for using hbase.

Thanks
labtrax
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