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Posted to user@hadoop.apache.org by Jun Li <jl...@gmail.com> on 2013/09/10 20:30:46 UTC
whether dfs.domain.socket.path is supported in Hadoop 1.1?
Hi,
In the link,
http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml,
the explanation:
dfs.domain.socket.path
is that:
"Optional. This is a path to a UNIX domain socket that will be used for
communication between the DataNode and local HDFS clients. If the string
"_PORT" is present in this path, it will be replaced by the TCP port of the
DataNode."
I am trying to evaluate the short-circuit read and find that typically this
dfs.domain.socket.path is used in conjunction to enabling the short circuit
for HDFS.
I am using Hadoop 1.1.2. And from the source code of Hadoop 1.1.2, I can
not find the configuration parameter of this "dfs.domain.socket.path" and I
wonder whether this parameter setting only gets used by Hadoop 2.*
release?
Could you provide explanation on this about the Hadoop version support?
Regards,
Jun
Re: whether dfs.domain.socket.path is supported in Hadoop 1.1?
Posted by Harsh J <ha...@cloudera.com>.
HDFS-347 introduced this feature, and it is currently only available
in 2.1.x onwards.
On Wed, Sep 11, 2013 at 12:00 AM, Jun Li <jl...@gmail.com> wrote:
> Hi,
>
> In the link,
> http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml,
>
> the explanation:
> dfs.domain.socket.path
>
> is that:
>
> "Optional. This is a path to a UNIX domain socket that will be used for
> communication between the DataNode and local HDFS clients. If the string
> "_PORT" is present in this path, it will be replaced by the TCP port of the
> DataNode."
>
> I am trying to evaluate the short-circuit read and find that typically this
> dfs.domain.socket.path is used in conjunction to enabling the short circuit
> for HDFS.
>
>
> I am using Hadoop 1.1.2. And from the source code of Hadoop 1.1.2, I can not
> find the configuration parameter of this "dfs.domain.socket.path" and I
> wonder whether this parameter setting only gets used by Hadoop 2.* release?
>
> Could you provide explanation on this about the Hadoop version support?
>
> Regards,
>
> Jun
>
>
--
Harsh J
Re: whether dfs.domain.socket.path is supported in Hadoop 1.1?
Posted by Harsh J <ha...@cloudera.com>.
HDFS-347 introduced this feature, and it is currently only available
in 2.1.x onwards.
On Wed, Sep 11, 2013 at 12:00 AM, Jun Li <jl...@gmail.com> wrote:
> Hi,
>
> In the link,
> http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml,
>
> the explanation:
> dfs.domain.socket.path
>
> is that:
>
> "Optional. This is a path to a UNIX domain socket that will be used for
> communication between the DataNode and local HDFS clients. If the string
> "_PORT" is present in this path, it will be replaced by the TCP port of the
> DataNode."
>
> I am trying to evaluate the short-circuit read and find that typically this
> dfs.domain.socket.path is used in conjunction to enabling the short circuit
> for HDFS.
>
>
> I am using Hadoop 1.1.2. And from the source code of Hadoop 1.1.2, I can not
> find the configuration parameter of this "dfs.domain.socket.path" and I
> wonder whether this parameter setting only gets used by Hadoop 2.* release?
>
> Could you provide explanation on this about the Hadoop version support?
>
> Regards,
>
> Jun
>
>
--
Harsh J
Re: whether dfs.domain.socket.path is supported in Hadoop 1.1?
Posted by Harsh J <ha...@cloudera.com>.
HDFS-347 introduced this feature, and it is currently only available
in 2.1.x onwards.
On Wed, Sep 11, 2013 at 12:00 AM, Jun Li <jl...@gmail.com> wrote:
> Hi,
>
> In the link,
> http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml,
>
> the explanation:
> dfs.domain.socket.path
>
> is that:
>
> "Optional. This is a path to a UNIX domain socket that will be used for
> communication between the DataNode and local HDFS clients. If the string
> "_PORT" is present in this path, it will be replaced by the TCP port of the
> DataNode."
>
> I am trying to evaluate the short-circuit read and find that typically this
> dfs.domain.socket.path is used in conjunction to enabling the short circuit
> for HDFS.
>
>
> I am using Hadoop 1.1.2. And from the source code of Hadoop 1.1.2, I can not
> find the configuration parameter of this "dfs.domain.socket.path" and I
> wonder whether this parameter setting only gets used by Hadoop 2.* release?
>
> Could you provide explanation on this about the Hadoop version support?
>
> Regards,
>
> Jun
>
>
--
Harsh J
Re: whether dfs.domain.socket.path is supported in Hadoop 1.1?
Posted by Harsh J <ha...@cloudera.com>.
HDFS-347 introduced this feature, and it is currently only available
in 2.1.x onwards.
On Wed, Sep 11, 2013 at 12:00 AM, Jun Li <jl...@gmail.com> wrote:
> Hi,
>
> In the link,
> http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml,
>
> the explanation:
> dfs.domain.socket.path
>
> is that:
>
> "Optional. This is a path to a UNIX domain socket that will be used for
> communication between the DataNode and local HDFS clients. If the string
> "_PORT" is present in this path, it will be replaced by the TCP port of the
> DataNode."
>
> I am trying to evaluate the short-circuit read and find that typically this
> dfs.domain.socket.path is used in conjunction to enabling the short circuit
> for HDFS.
>
>
> I am using Hadoop 1.1.2. And from the source code of Hadoop 1.1.2, I can not
> find the configuration parameter of this "dfs.domain.socket.path" and I
> wonder whether this parameter setting only gets used by Hadoop 2.* release?
>
> Could you provide explanation on this about the Hadoop version support?
>
> Regards,
>
> Jun
>
>
--
Harsh J