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From Uma Maheswara Rao G 72686 <mahesw...@huawei.com>
Subject Re: risks of using Hadoop
Date Sat, 17 Sep 2011 20:41:43 GMT
Yes, 
I was mentioning before append beacuse branch name itself is 20Append. Sync is the main api
name to sync editlogs. 

@George
  mainly need to consider the Hbase usage.
sync is supported.
append api has some open issues. for example https://issues.apache.org/jira/browse/HDFS-1228

Apologies for the confusions if any.

Thanks a lot for more clarification!
 
Thanks
Uma
----- Original Message -----
From: Todd Lipcon <todd@cloudera.com>
Date: Sunday, September 18, 2011 1:35 am
Subject: Re: risks of using Hadoop
To: common-user@hadoop.apache.org

> To clarify, *append* is not supported and is known to be buggy. *sync*
> support is what HBase needs and what 0.20.205 will support. Before 205
> is released, you can also find these features in CDH3 or by building
> your own release from SVN.
> 
> -Todd
> 
> On Sat, Sep 17, 2011 at 4:59 AM, Uma Maheswara Rao G 72686
> <maheswara@huawei.com> wrote:
> > Hi George,
> >
> > You can use it noramally as well. Append interfaces will be exposed.
> > For Hbase, append support is required very much.
> >
> > Regards,
> > Uma
> >
> > ----- Original Message -----
> > From: George Kousiouris <gkousiou@mail.ntua.gr>
> > Date: Saturday, September 17, 2011 12:29 pm
> > Subject: Re: risks of using Hadoop
> > To: common-user@hadoop.apache.org
> > Cc: Uma Maheswara Rao G 72686 <maheswara@huawei.com>
> >
> >>
> >> Hi,
> >>
> >> When you say that 0.20.205 will support appends, you mean for
> >> general
> >> purpose writes on the HDFS? or only Hbase?
> >>
> >> Thanks,
> >> George
> >>
> >> On 9/17/2011 7:08 AM, Uma Maheswara Rao G 72686 wrote:
> >> > 6. If you plan to use Hbase, it requires append support. 20Append
> >> has the support for append. 0.20.205 release also will have append
> >> support but not yet released. Choose your correct version to avoid
> >> sudden surprises.
> >> >
> >> >
> >> >
> >> > Regards,
> >> > Uma
> >> > ----- Original Message -----
> >> > From: Kobina Kwarko<kobina.kwarko@gmail.com>
> >> > Date: Saturday, September 17, 2011 3:42 am
> >> > Subject: Re: risks of using Hadoop
> >> > To: common-user@hadoop.apache.org
> >> >
> >> >> We are planning to use Hadoop in my organisation for quality of
> >> >> servicesanalysis out of CDR records from mobile operators. We 
> are>> >> thinking of having
> >> >> a small cluster of may be 10 - 15 nodes and I'm preparing the
> >> >> proposal. my
> >> >> office requires that i provide some risk analysis in the 
> proposal.>> >>
> >> >> thank you.
> >> >>
> >> >> On 16 September 2011 20:34, Uma Maheswara Rao G 72686
> >> >> <maheswara@huawei.com>wrote:
> >> >>
> >> >>> Hello,
> >> >>>
> >> >>> First of all where you are planning to use Hadoop?
> >> >>>
> >> >>> Regards,
> >> >>> Uma
> >> >>> ----- Original Message -----
> >> >>> From: Kobina Kwarko<kobina.kwarko@gmail.com>
> >> >>> Date: Saturday, September 17, 2011 0:41 am
> >> >>> Subject: risks of using Hadoop
> >> >>> To: common-user<common-user@hadoop.apache.org>
> >> >>>
> >> >>>> Hello,
> >> >>>>
> >> >>>> Please can someone point some of the risks we may incur if
we
> >> >>>> decide to
> >> >>>> implement Hadoop?
> >> >>>>
> >> >>>> BR,
> >> >>>>
> >> >>>> Isaac.
> >> >>>>
> >> >
> >>
> >>
> >> --
> >>
> >> ---------------------------
> >>
> >> George Kousiouris
> >> Electrical and Computer Engineer
> >> Division of Communications,
> >> Electronics and Information Engineering
> >> School of Electrical and Computer Engineering
> >> Tel: +30 210 772 2546
> >> Mobile: +30 6939354121
> >> Fax: +30 210 772 2569
> >> Email: gkousiou@mail.ntua.gr
> >> Site: http://users.ntua.gr/gkousiou/
> >>
> >> National Technical University of Athens
> >> 9 Heroon Polytechniou str., 157 73 Zografou, Athens, Greece
> >>
> >>
> >
> 
> 
> 
> -- 
> Todd Lipcon
> Software Engineer, Cloudera
> 

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