I have no special settings for the hadoop security. Is it necessary to specify dfs.block.local-path-access.user then? If yes, is it the same user my hadoop daemon is running under?
Thanks Yves On Jan 6, 2012, at 4:27 PM, Stack wrote: > On Thu, Jan 5, 2012 at 10:48 PM, zizon <[email protected]> wrote: >> <property> >> <name>*dfs.client.read.shortcircuit*</name> >> <value>true</value> >> <description>set this to true to enable DFSClient short circuit >> read</description> >> </property> >> > > You must set the above on both client and server side; i.e. in > hbase-site.xml and in hdfs-site.xml. > >> <property> >> <name>*dfs.block.local-path-access.user*</name> >> <value>hadoop</value> >> <description>add users that need perform short circuit read here,datanode >> will do security check before the read</description> >> </property> >> > > This you set server-side only. Adjust the value 'hadoop' accordingly. > > I believe the only way to tell local reads are working is jstacking > your hbase and looking for local block accesses. > > We''ll fix our documentation to include the above. > > St.Ack > >> >> On Fri, Jan 6, 2012 at 2:25 PM, Yves Langisch <[email protected]> wrote: >> >>> How can you enable the mentioned local-read-optimization for hadoop-1.0.0? >>> I could not find any related information. >>> >>> - >>> Yves >>> >>> On Jan 6, 2012, at 6:24 AM, Arun C Murthy wrote: >>> >>>> I know we've done integration testing with hadoop-1.0.0 and hbase-0.90.4 >>> and things work well, not sure about hbase-0.90.5 (I don't imagine there >>> are issues, but ymmv). >>>> >>>> In fact, you get a nice perf boost with hadoop-1.0.0 for hbase if you >>> enable the local-read-optimization. >>>> >>>> Arun >>>> >>>> On Jan 4, 2012, at 10:19 PM, praveenesh kumar wrote: >>>> >>>>> Don't know about Hadoop 1.0.0 but Hadoop 0.20.205 and Hadoop 0.90.5 are >>>>> playing with each other very fine. >>>>> >>>>> Thanks, >>>>> Praveenesh >>>>> >>>>> On Thu, Jan 5, 2012 at 11:36 AM, Weihua JIANG <[email protected] >>>> wrote: >>>>> >>>>>> Hi all, >>>>>> >>>>>> Hadoop 1.0.0 and HBase 0.90.5 are released. I am curious whether hadoop >>>>>> 1.0.0 is compatible with HBase 0.90.5. And whether this combination is >>> the >>>>>> best choice for production cluster now? >>>>>> >>>>>> Thanks >>>>>> Weihua >>>>>> >>>> >>> >>> >
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