Re: Can anyone show me how to construct the HFileReaderV2 object to read the HFile content.
On Fri, Mar 16, 2012 at 10:12 AM, yonghu wrote: > I noticed the problem is that somehow I lost the data from hdfs. The > code is ok. > > Regards! > Why write code? The hfile tool, http://hbase.apache.org/book.html#hfile_tool2, gives a pretty rich summary on file content (or you can ask it dump it for you). St.Ack
Re: Can anyone show me how to construct the HFileReaderV2 object to read the HFile content.
I noticed the problem is that somehow I lost the data from hdfs. The
code is ok.
Regards!
Yong
On Fri, Mar 16, 2012 at 5:59 PM, yonghu wrote:
> I implemented the code like this way. My Hbase version is 0.92.0.
>
> Configuration conf = new Configuration();
> CacheConfig cconf = new CacheConfig(conf);
> FileSystem fs = FileSystem.get(conf);
> Path path = new
> Path("hdfs://localhost:8020/hbase/test/97366a27a98e0f43dfcecf9b63abd630/Course/33b6235defe44f69bda69c04e87fc7a9");
> HFile.Reader reader = HFile.createReader(fs, path, cconf);
> HFileScanner hscanner = reader.getScanner(false, false, false);
> hscanner.seekTo();
> KeyValue kv = hscanner.getKeyValue();
> System.out.println(kv.toString() + "+" +
> kv.getValue().toString());
> while(hscanner.next()){
> kv = hscanner.getKeyValue();
> System.out.println(kv.toString() + "+" +
> kv.getValue().toString());
> }
>
> I have already flush the data from the memstore into the disk. But I
> got the error information, Exception in thread "main"
> java.io.IOException: Cannot open filename
> /hbase/test/97366a27a98e0f43dfcecf9b63abd630/Course/33b6235defe44f69bda69c04e87fc7a9.
>
> I can see the results from the command line. I want to know that why
> its code dose not work?
>
> Regards!
>
> Yong
>
> On Fri, Mar 16, 2012 at 5:50 PM, yonghu wrote:
>> Thanks for your information.
>>
>> Regards!
>>
>> Yong
>>
>> On Fri, Mar 16, 2012 at 5:39 PM, Stack wrote:
>>> On Fri, Mar 16, 2012 at 9:01 AM, yonghu wrote:
Hello,
Can anyone give me a example to construct the HFileReaderV2 object to
read the HFile content.
Thanks!
>>>
>>> See
>>> http://hbase.apache.org/xref/org/apache/hadoop/hbase/io/hfile/HFile.html#499
>>>
>>> St.Ack
Re: Can anyone show me how to construct the HFileReaderV2 object to read the HFile content.
I implemented the code like this way. My Hbase version is 0.92.0.
Configuration conf = new Configuration();
CacheConfig cconf = new CacheConfig(conf);
FileSystem fs = FileSystem.get(conf);
Path path = new
Path("hdfs://localhost:8020/hbase/test/97366a27a98e0f43dfcecf9b63abd630/Course/33b6235defe44f69bda69c04e87fc7a9");
HFile.Reader reader = HFile.createReader(fs, path, cconf);
HFileScanner hscanner = reader.getScanner(false, false, false);
hscanner.seekTo();
KeyValue kv = hscanner.getKeyValue();
System.out.println(kv.toString() + "+" +
kv.getValue().toString());
while(hscanner.next()){
kv = hscanner.getKeyValue();
System.out.println(kv.toString() + "+" +
kv.getValue().toString());
}
I have already flush the data from the memstore into the disk. But I
got the error information, Exception in thread "main"
java.io.IOException: Cannot open filename
/hbase/test/97366a27a98e0f43dfcecf9b63abd630/Course/33b6235defe44f69bda69c04e87fc7a9.
I can see the results from the command line. I want to know that why
its code dose not work?
Regards!
Yong
On Fri, Mar 16, 2012 at 5:50 PM, yonghu wrote:
> Thanks for your information.
>
> Regards!
>
> Yong
>
> On Fri, Mar 16, 2012 at 5:39 PM, Stack wrote:
>> On Fri, Mar 16, 2012 at 9:01 AM, yonghu wrote:
>>> Hello,
>>>
>>> Can anyone give me a example to construct the HFileReaderV2 object to
>>> read the HFile content.
>>>
>>> Thanks!
>>>
>>
>> See
>> http://hbase.apache.org/xref/org/apache/hadoop/hbase/io/hfile/HFile.html#499
>>
>> St.Ack
Re: Can anyone show me how to construct the HFileReaderV2 object to read the HFile content.
Thanks for your information. Regards! Yong On Fri, Mar 16, 2012 at 5:39 PM, Stack wrote: > On Fri, Mar 16, 2012 at 9:01 AM, yonghu wrote: >> Hello, >> >> Can anyone give me a example to construct the HFileReaderV2 object to >> read the HFile content. >> >> Thanks! >> > > See > http://hbase.apache.org/xref/org/apache/hadoop/hbase/io/hfile/HFile.html#499 > > St.Ack
Re: Can anyone show me how to construct the HFileReaderV2 object to read the HFile content.
On Fri, Mar 16, 2012 at 9:01 AM, yonghu wrote: > Hello, > > Can anyone give me a example to construct the HFileReaderV2 object to > read the HFile content. > > Thanks! > See http://hbase.apache.org/xref/org/apache/hadoop/hbase/io/hfile/HFile.html#499 St.Ack
