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From 谢良 <xieli...@xiaomi.com>
Subject About "dfs.datanode.readahead.bytes"
Date Mon, 26 Nov 2012 06:58:21 GMT
Is there anybody had benchmarked dfs.datanode.readahead.bytes parameter in HBase scenario ?
My option is that we should tune it to a smaller value(e.g. on Hadoop 2.0), like 512k or sth
else, especially high random read request in pretty huge dataset.  Dose it make sense ?
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