Home | About | Sematext search-lucene.com search-hadoop.com
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB
 Search Hadoop and all its subprojects:

Switch to Threaded View
MapReduce >> mail # user >> Why LineRecordWriter.write(..) is synchronized


Copy link to this message
-
Re: Why LineRecordWriter.write(..) is synchronized
its not hadoop forked threads, we may create a line record writer, then
call this writer concurrently.
On Aug 8, 2013 4:00 PM, "Sathwik B P" <[EMAIL PROTECTED]> wrote:

> Hi,
> Thanks for your reply.
> May I know where does hadoop fork multiple threads to use a single
> RecordWriter.
>
> regards,
> sathwik
>
> On Thu, Aug 8, 2013 at 7:06 AM, Azuryy Yu <[EMAIL PROTECTED]> wrote:
>
>> because we may use multi-threads to write a single file.
>> On Aug 8, 2013 2:54 PM, "Sathwik B P" <[EMAIL PROTECTED]> wrote:
>>
>>> Hi,
>>>
>>> LineRecordWriter.write(..) is synchronized. I did not find any other
>>> RecordWriter implementations define the write as synchronized.
>>> Any specific reason for this.
>>>
>>> regards,
>>> sathwik
>>>
>>
>
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB