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From Jing Zhao <j...@hortonworks.com>
Subject Re: Deprecate hftp / hsftp
Date Wed, 27 Nov 2013 02:01:32 GMT
+1

So I've reviewed most of Haohui's patch for developing swebhdfs,
fixing https setup for hsftp, and supporting HA in webhdfs. For both
webhdfs and swebhdfs we have run system tests on both secured and
insecure cluster, including running distcp to transfer data between
1.x and 2.x. I believe currently webhdfs/swebhdfs is in a very good
shape.

Also, recently the new web UI in HDFS requires enabling WebHDFS by
default (HDFS-5532). Thus it is a good time to deprecate HFTP.

On Tue, Nov 26, 2013 at 5:33 PM, Tsz Wo (Nicholas), Sze
<s29752-hadoopdev@yahoo.com> wrote:
> +1
>
> WebHDFS has been around for two years and has become mature.  It is a rewrite of HFTP
and is intended to replace HFTP as stated in my blog [1].  Now is indeed a good time to deprecate
HFTP.
>
> Haohui, thanks a lot for adding swebhdfs and fixing the secure setups!
>
> Tsz-Wo
> [1] http://hortonworks.com/blog/webhdfs-–-http-rest-access-to-hdfs/
>
>
>
>
> On Tuesday, November 26, 2013 2:30 PM, Haohui Mai <hmai@hortonworks.com> wrote:
>
> I meant HDP 1.3, which is based on Hadoop 1.2.
>>
>>~Haohui
>>
>>
>>On Tue, Nov 26, 2013 at 2:19 PM, Haohui Mai <hmai@hortonworks.com> wrote:
>>
>>> Hi Lohit,
>>>
>>> Some of our customers are running Hadoop 1.3, and they run distcp to
>>> transfer data via webhdfs in production.
>>>
>>> We use distcp to transfer data between Hadoop 1.x and Hadoop 2.x. As far
>>> as I know webhdfs is the most reliable way to transfer data between secure
>>> and insecure clusters across different Hadoop versions.
>>>
>>> ~Haohui
>>>
>>>
>>> On Tue, Nov 26, 2013 at 1:51 PM, lohit <lohit.vijayarenu@gmail.com> wrote:
>>>
>>>> Curious to know usage of webhdfs for Hadoop 1.0. Are people using it in
>>>> production?
>>>> Reason I ask is because we use lot of hftp to transfer data between Hadoop
>>>> 1.0 and Hadoop 2.0 as of today.
>>>> Removing hftp would mean that anyone using Hadoop 1.0 and Hadoop 3.0 would
>>>> have to move to webhdfs, right?
>>>>
>>>>
>>>>
>>>> 2013/11/26 Suresh Srinivas <suresh@hortonworks.com>
>>>>
>>>> > Thanks Haohui for all your hard work in this area. I am +1 on this
>>>> > proposal.
>>>> >
>>>> >
>>>> > On Tue, Nov 26, 2013 at 12:50 PM, Haohui Mai <hmai@hortonworks.com>
>>>> wrote:
>>>> >
>>>> > > Hi,
>>>> > >
>>>> > > Recently I've been focusing on fixing hftp / hsftp / webhdfs /
>>>> swebhdfs
>>>> > in
>>>> > > various set ups. Now we have reached the state that all the above
file
>>>> > > systems can work in both secure and insecure clusters, and transfer
>>>> data
>>>> > > through both http and https.
>>>> > >
>>>> > > Taking a step back, these file systems are very similar, and I'm
>>>> > wondering
>>>> > > whether it is a good time to deprecate hftp and hsftp in Hadoop
right
>>>> > now.
>>>> > >
>>>> > > The main reason is that hftp / hsftp only provides a strict subset
of
>>>> > > functionalities that webhdfs / swebhdfs offer. Notably, webhdfs
/
>>>> > swebhdfs
>>>> > > support writes and HA which hftp / hsftp do not support. It's more
>>>> > natural
>>>> > > to move forward with webhdfs / swebhdfs, keeping both hftp / hsftp
>>>> around
>>>> > > seems introducing more work.
>>>> > >
>>>> > > Another reason is that webhdfs has been supported since Hadoop
1, thus
>>>> > > getting rid of hftp / hsftp does not seem removing any features,
even
>>>> the
>>>> > > users are trying to migrate from Hadoop 1 to Hadoop 2.
>>>> > >
>>>> > >
>>>> > > Your ideas are appreciated.
>>>> > >
>>>> > > Thanks,
>>>> > > Haohui
>>>> > >
>>>> > > --
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>>>> >
>>>> >
>>>> > --
>>>> > http://hortonworks.com/download/
>>>> >
>>>> > --
>>>> > CONFIDENTIALITY NOTICE
>>>> > NOTICE: This message is intended for the use of the individual or
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>>>>
>>>> --
>>>> Have a Nice Day!
>>>> Lohit
>>>>
>>>
>>>
>>
>>--
>>CONFIDENTIALITY NOTICE
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>>
>>

-- 
CONFIDENTIALITY NOTICE
NOTICE: This message is intended for the use of the individual or entity to 
which it is addressed and may contain information that is confidential, 
privileged and exempt from disclosure under applicable law. If the reader 
of this message is not the intended recipient, you are hereby notified that 
any printing, copying, dissemination, distribution, disclosure or 
forwarding of this communication is strictly prohibited. If you have 
received this communication in error, please contact the sender immediately 
and delete it from your system. Thank You.

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