RE: Appending to HDFS file
Thank you all,
It works now
Regards
rab
On 28 Aug 2014 12:06, "Liu, Yi A" wrote:
> Right, please use FileSystem#append
>
>
>
> *From:* Stanley Shi [mailto:s...@pivotal.io]
> *Sent:* Thursday, August 28, 2014 2:18 PM
> *To:* user@hadoop.apache.org
> *Subject:* Re: Appending to HDFS file
>
>
>
> You should not use this method:
>
> FSDataOutputStream fp = fs.create(pt, true)
>
>
>
> Here's the java doc for this "create" method:
>
>
>
> /**
>
>* Create an FSDataOutputStream at the indicated Path.
>
>* @param f the file to create
>
>* @*param overwrite if a file with this name already exists, then if
> true,*
>
>* the file will be overwritten, and if false an exception will be
> thrown.
>
>*/
>
> public FSDataOutputStream create(Path f, boolean overwrite)
>
> throws IOException {
>
> return create(f, overwrite,
>
> getConf().getInt("io.file.buffer.size", 4096),
>
> getDefaultReplication(f),
>
> getDefaultBlockSize(f));
>
> }
>
>
>
> On Wed, Aug 27, 2014 at 2:12 PM, rab ra wrote:
>
>
> hello
>
> Here is d code snippet, I use to append
>
> def outFile = "${outputFile}.txt"
>
> Path pt = new Path("${hdfsName}/${dir}/${outFile}")
>
> def fs = org.apache.hadoop.fs.FileSystem.get(configuration);
>
> FSDataOutputStream fp = fs.create(pt, true)
>
> fp << "${key} ${value}\n"
>
> On 27 Aug 2014 09:46, "Stanley Shi" wrote:
>
> would you please past the code in the loop?
>
>
>
> On Sat, Aug 23, 2014 at 2:47 PM, rab ra wrote:
>
> Hi
>
> By default, it is true in hadoop 2.4.1. Nevertheless, I have set it to
> true explicitly in hdfs-site.xml. Still, I am not able to achieve append.
>
> Regards
>
> On 23 Aug 2014 11:20, "Jagat Singh" wrote:
>
> What is value of dfs.support.append in hdfs-site.cml
>
>
>
>
> https://hadoop.apache.org/docs/r2.3.0/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml
>
>
>
>
>
>
>
> On Sat, Aug 23, 2014 at 1:41 AM, rab ra wrote:
>
> Hello,
>
>
>
> I am currently using Hadoop 2.4.1.I am running a MR job using hadoop
> streaming utility.
>
>
>
> The executable needs to write large amount of information in a file.
> However, this write is not done in single attempt. The file needs to be
> appended with streams of information generated.
>
>
>
> In the code, inside a loop, I open a file in hdfs, appends some
> information. This is not working and I see only the last write.
>
>
>
> How do I accomplish append operation in hadoop? Can anyone share a pointer
> to me?
>
>
>
>
>
>
>
>
>
> regards
>
> Bala
>
>
>
>
>
>
>
> --
>
> Regards,
>
> *Stanley Shi,*
>
>
>
>
>
> --
>
> Regards,
>
> *Stanley Shi,*
>
>
RE: Appending to HDFS file
Right, please use FileSystem#append
From: Stanley Shi [mailto:s...@pivotal.io]
Sent: Thursday, August 28, 2014 2:18 PM
To: user@hadoop.apache.org
Subject: Re: Appending to HDFS file
You should not use this method:
FSDataOutputStream fp = fs.create(pt, true)
Here's the java doc for this "create" method:
/**
* Create an FSDataOutputStream at the indicated Path.
* @param f the file to create
* @param overwrite if a file with this name already exists, then if true,
* the file will be overwritten, and if false an exception will be thrown.
*/
public FSDataOutputStream create(Path f, boolean overwrite)
throws IOException {
return create(f, overwrite,
getConf().getInt("io.file.buffer.size", 4096),
getDefaultReplication(f),
getDefaultBlockSize(f));
}
On Wed, Aug 27, 2014 at 2:12 PM, rab ra
mailto:rab...@gmail.com>> wrote:
hello
Here is d code snippet, I use to append
def outFile = "${outputFile}.txt"
Path pt = new Path("${hdfsName}/${dir}/${outFile}")
def fs = org.apache.hadoop.fs.FileSystem.get(configuration);
FSDataOutputStream fp = fs.create(pt, true)
fp << "${key} ${value}\n"
On 27 Aug 2014 09:46, "Stanley Shi" mailto:s...@pivotal.io>>
wrote:
would you please past the code in the loop?
On Sat, Aug 23, 2014 at 2:47 PM, rab ra
mailto:rab...@gmail.com>> wrote:
Hi
By default, it is true in hadoop 2.4.1. Nevertheless, I have set it to true
explicitly in hdfs-site.xml. Still, I am not able to achieve append.
Regards
On 23 Aug 2014 11:20, "Jagat Singh"
mailto:jagatsi...@gmail.com>> wrote:
What is value of dfs.support.append in hdfs-site.cml
https://hadoop.apache.org/docs/r2.3.0/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml
On Sat, Aug 23, 2014 at 1:41 AM, rab ra
mailto:rab...@gmail.com>> wrote:
Hello,
I am currently using Hadoop 2.4.1.I am running a MR job using hadoop streaming
utility.
The executable needs to write large amount of information in a file. However,
this write is not done in single attempt. The file needs to be appended with
streams of information generated.
In the code, inside a loop, I open a file in hdfs, appends some information.
This is not working and I see only the last write.
How do I accomplish append operation in hadoop? Can anyone share a pointer to
me?
regards
Bala
--
Regards,
Stanley Shi,
[http://www.gopivotal.com/files/media/logos/pivotal-logo-email-signature.png]
--
Regards,
Stanley Shi,
[http://www.gopivotal.com/files/media/logos/pivotal-logo-email-signature.png]
Re: Appending to HDFS file
You should not use this method:
FSDataOutputStream fp = fs.create(pt, true)
Here's the java doc for this "create" method:
/**
* Create an FSDataOutputStream at the indicated Path.
* @param f the file to create
* @*param** overwrite if a file with this name already exists, then if
true,*
* the file will be overwritten, and if false an exception will be
thrown.
*/
public FSDataOutputStream create(Path f, boolean overwrite)
throws IOException {
return create(f, overwrite,
getConf().getInt("io.file.buffer.size", 4096),
getDefaultReplication(f),
getDefaultBlockSize(f));
}
On Wed, Aug 27, 2014 at 2:12 PM, rab ra wrote:
>
> hello
>
> Here is d code snippet, I use to append
>
> def outFile = "${outputFile}.txt"
>
> Path pt = new Path("${hdfsName}/${dir}/${outFile}")
>
> def fs = org.apache.hadoop.fs.FileSystem.get(configuration);
>
> FSDataOutputStream fp = fs.create(pt, true)
>
> fp << "${key} ${value}\n"
> On 27 Aug 2014 09:46, "Stanley Shi" wrote:
>
>> would you please past the code in the loop?
>>
>>
>> On Sat, Aug 23, 2014 at 2:47 PM, rab ra wrote:
>>
>>> Hi
>>>
>>> By default, it is true in hadoop 2.4.1. Nevertheless, I have set it to
>>> true explicitly in hdfs-site.xml. Still, I am not able to achieve append.
>>>
>>> Regards
>>> On 23 Aug 2014 11:20, "Jagat Singh" wrote:
>>>
What is value of dfs.support.append in hdfs-site.cml
https://hadoop.apache.org/docs/r2.3.0/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml
On Sat, Aug 23, 2014 at 1:41 AM, rab ra wrote:
> Hello,
>
> I am currently using Hadoop 2.4.1.I am running a MR job using hadoop
> streaming utility.
>
> The executable needs to write large amount of information in a file.
> However, this write is not done in single attempt. The file needs to be
> appended with streams of information generated.
>
> In the code, inside a loop, I open a file in hdfs, appends some
> information. This is not working and I see only the last write.
>
> How do I accomplish append operation in hadoop? Can anyone share a
> pointer to me?
>
>
>
>
> regards
> Bala
>
>>
>>
>> --
>> Regards,
>> *Stanley Shi,*
>>
>>
--
Regards,
*Stanley Shi,*
Re: Appending to HDFS file
hello
Here is d code snippet, I use to append
def outFile = "${outputFile}.txt"
Path pt = new Path("${hdfsName}/${dir}/${outFile}")
def fs = org.apache.hadoop.fs.FileSystem.get(configuration);
FSDataOutputStream fp = fs.create(pt, true)
fp << "${key} ${value}\n"
On 27 Aug 2014 09:46, "Stanley Shi" wrote:
> would you please past the code in the loop?
>
>
> On Sat, Aug 23, 2014 at 2:47 PM, rab ra wrote:
>
>> Hi
>>
>> By default, it is true in hadoop 2.4.1. Nevertheless, I have set it to
>> true explicitly in hdfs-site.xml. Still, I am not able to achieve append.
>>
>> Regards
>> On 23 Aug 2014 11:20, "Jagat Singh" wrote:
>>
>>> What is value of dfs.support.append in hdfs-site.cml
>>>
>>>
>>> https://hadoop.apache.org/docs/r2.3.0/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml
>>>
>>>
>>>
>>>
>>> On Sat, Aug 23, 2014 at 1:41 AM, rab ra wrote:
>>>
Hello,
I am currently using Hadoop 2.4.1.I am running a MR job using hadoop
streaming utility.
The executable needs to write large amount of information in a file.
However, this write is not done in single attempt. The file needs to be
appended with streams of information generated.
In the code, inside a loop, I open a file in hdfs, appends some
information. This is not working and I see only the last write.
How do I accomplish append operation in hadoop? Can anyone share a
pointer to me?
regards
Bala
>>>
>>>
>
>
> --
> Regards,
> *Stanley Shi,*
>
>
Re: Appending to HDFS file
would you please past the code in the loop? On Sat, Aug 23, 2014 at 2:47 PM, rab ra wrote: > Hi > > By default, it is true in hadoop 2.4.1. Nevertheless, I have set it to > true explicitly in hdfs-site.xml. Still, I am not able to achieve append. > > Regards > On 23 Aug 2014 11:20, "Jagat Singh" wrote: > >> What is value of dfs.support.append in hdfs-site.cml >> >> >> https://hadoop.apache.org/docs/r2.3.0/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml >> >> >> >> >> On Sat, Aug 23, 2014 at 1:41 AM, rab ra wrote: >> >>> Hello, >>> >>> I am currently using Hadoop 2.4.1.I am running a MR job using hadoop >>> streaming utility. >>> >>> The executable needs to write large amount of information in a file. >>> However, this write is not done in single attempt. The file needs to be >>> appended with streams of information generated. >>> >>> In the code, inside a loop, I open a file in hdfs, appends some >>> information. This is not working and I see only the last write. >>> >>> How do I accomplish append operation in hadoop? Can anyone share a >>> pointer to me? >>> >>> >>> >>> >>> regards >>> Bala >>> >> >> -- Regards, *Stanley Shi,*
Re: Appending to HDFS file
Hi By default, it is true in hadoop 2.4.1. Nevertheless, I have set it to true explicitly in hdfs-site.xml. Still, I am not able to achieve append. Regards On 23 Aug 2014 11:20, "Jagat Singh" wrote: > What is value of dfs.support.append in hdfs-site.cml > > > https://hadoop.apache.org/docs/r2.3.0/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml > > > > > On Sat, Aug 23, 2014 at 1:41 AM, rab ra wrote: > >> Hello, >> >> I am currently using Hadoop 2.4.1.I am running a MR job using hadoop >> streaming utility. >> >> The executable needs to write large amount of information in a file. >> However, this write is not done in single attempt. The file needs to be >> appended with streams of information generated. >> >> In the code, inside a loop, I open a file in hdfs, appends some >> information. This is not working and I see only the last write. >> >> How do I accomplish append operation in hadoop? Can anyone share a >> pointer to me? >> >> >> >> >> regards >> Bala >> > >
Re: Appending to HDFS file
What is value of dfs.support.append in hdfs-site.cml https://hadoop.apache.org/docs/r2.3.0/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml On Sat, Aug 23, 2014 at 1:41 AM, rab ra wrote: > Hello, > > I am currently using Hadoop 2.4.1.I am running a MR job using hadoop > streaming utility. > > The executable needs to write large amount of information in a file. > However, this write is not done in single attempt. The file needs to be > appended with streams of information generated. > > In the code, inside a loop, I open a file in hdfs, appends some > information. This is not working and I see only the last write. > > How do I accomplish append operation in hadoop? Can anyone share a pointer > to me? > > > > > regards > Bala >
