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From Konstantin Shvachko <...@yahoo-inc.com>
Subject Re: RandomAccessFile with HDFS
Date Wed, 23 Sep 2009 17:29:50 GMT
Stas,

you can track the status of append here:
http://issues.apache.org/jira/browse/HDFS-265

The latest status is:
http://issues.apache.org/jira/browse/HDFS-265?focusedCommentId=12757764&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12757764

Thanks for your interest,
--Konstantin

Stas Oskin wrote:
> Hi.
> 
> Hopefully they will put the presentation online.
> 
> Regards.
> 
> 2009/9/23 Edward Capriolo <edlinuxguru@gmail.com>
> 
>> On Wed, Sep 23, 2009 at 3:28 AM, Stas Oskin <stas.oskin@gmail.com> wrote:
>>> By the way, something that I forgot to ask before:
>>>
>>> Will the append implementation be as fast, as the write/copy functions?
>>>
>>> Regards.
>>>
>>> 2009/9/23 Stas Oskin <stas.oskin@gmail.com>
>>>
>>>> Thanks, I exactly wanted to ask this for our R&D roadmap.
>>>>
>>>> 2009/9/23 Aaron Kimball <aaron@cloudera.com>
>>>>
>>>> Or maybe more pessimistically, the second "stable" append
>> implementation.
>>>>> It's not like HADOOP-1700 wasn't intended to work. It was just found
>> not
>>>>> to
>>>>> after the fact. Hopefully this reimplementation will succeed. If you're
>>>>> running a cluster that contains mission-critical data that cannot
>> tolerate
>>>>> corruption or loss, you shouldn't jump on the new-feature bandwagon
>> until
>>>>> it's had time to prove itself in the wild.
>>>>>
>>>>> But yes, we hope that appends will really-truly work in 0.21.
>>>>> Experimental/R&D projects should be able to plan on having a working
>>>>> append
>>>>> function in 0.21.
>>>>>
>>>>> - Aaron
>>>>>
>>>>> On Sun, Sep 20, 2009 at 3:58 PM, Stas Oskin <stas.oskin@gmail.com>
>> wrote:
>>>>>> Hi.
>>>>>>
>>>>>> Just to understand the road-map, 0.21 will be the first stable
>> "append"
>>>>>> implementation?
>>>>>>
>>>>>> Regards.
>>>>>>
>>>>>> 2009/9/20 Owen O'Malley <omalley@apache.org>
>>>>>>
>>>>>>> On Sep 13, 2009, at 3:08 AM, Stas Oskin wrote:
>>>>>>>
>>>>>>>  Hi.
>>>>>>>> Any idea when the "append" functionality is expected?
>>>>>>>>
>>>>>>> A working append is a blocker on HDFS 0.21.0.
>>>>>>>
>>>>>>> The code for append is expected to be complete in a few weeks.
>>>>> Meanwhile,
>>>>>>> the rest of Common, HDFS, and MapReduce have feature-frozen and
>> need
>>>>> to
>>>>>> be
>>>>>>> stabilized and all of the critical bugs fixed. I'd expect the
first
>>>>>> releases
>>>>>>> of 0.21.0 in early November.
>>>>>>>
>>>>>>> -- Owen
>>>>>>>
>> Also at "hadoop world nyc" http://cloudera.com/hadoop-world-nyc their
>> is going to be a presentation:
>>
>> Low Latency, Random Reads from HDFS, Jay Booth, Elastic Platforms
>>
>> That might be of interest to you.
>>
> 


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