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From Sreejith Ramakrishnan <sreejith.c...@gmail.com>
Subject Re: Request for mentor for project on ACCUMULO-1197
Date Wed, 17 Jul 2013 18:40:51 GMT
So, when I'm putting an email in the HDFS list, shall I cite ACCUMULO-1197
or HDFS-4680?


On Thu, Jul 18, 2013 at 12:03 AM, Billie Rinaldi
<billie.rinaldi@gmail.com>wrote:

> I suspect people may be reluctant due to the unknown nature of making
> changes to HDFS.  Perhaps if you could find someone to agree to be your
> mentor on the HDFS side, it would be easier to find an Accumulo mentor for
> the part of the project that involves integrating the HDFS changes with
> Accumulo.
>
> Billie
>
>
> On Wed, Jul 17, 2013 at 11:23 AM, Sreejith Ramakrishnan <
> sreejith.code@gmail.com> wrote:
>
> > Oh. I saw the ticket. I'll try that direction as well. Also, what do you
> > think are my odds at getting a mentor since its too close to the
> deadline?
> >
> > I'm still requesting mentorship since its a formality for the programme.
> > Still keeping my hopes up.
> >
> >
> > On Wed, Jul 17, 2013 at 11:45 PM, Billie Rinaldi
> > <billie.rinaldi@gmail.com>wrote:
> >
> > > I realize there isn't a lot of time before the deadline, but if you are
> > > interested in submitting a patch to HDFS I would encourage you to
> engage
> > > with the HDFS community to see if they are interested in such a feature
> > to
> > > increase the likelihood of your patch being accepted.  Their dev
> mailing
> > > list is hdfs-dev@hadoop.apache.org.
> > >
> > > I found one reference to Dapper in the HDFS tickets, HDFS-4680.  The
> > ticket
> > > isn't about tracing, but Todd Lipcon comments that he's experimented
> with
> > > adding tracing to Hadoop RPC and asks if people would find that useful.
> > > (There doesn't appear to be a reply.)
> > >
> > > Billie
> > >
> > >
> > > On Wed, Jul 17, 2013 at 11:01 AM, Sreejith Ramakrishnan <
> > > sreejith.code@gmail.com> wrote:
> > >
> > > > I think its a good idea to modify HDFS and Accumulo to support HTrace
> > > since
> > > > HBase has also started working in this direction. The progress made
> > could
> > > > benefit both projects. And also, HTrace follows the Dapper
> conventions.
> > > >
> > > > I'm not an expert. But from what I read in Google's paper and what's
> > > being
> > > > provided in HTrace, we can modify HDFS instrumentation to add a
> 64-bit
> > > > span-id to the RPC when tracing is enabled. And on the receiver side,
> > if
> > > it
> > > > receives a span-id, it shall also be traced with both the parent and
> > > child
> > > > nodes having the same trace-id.
> > > >
> > > > What do you think? Please do correct me if I'm wrong.
> > > >
> > > > P.S: Also, the last date for application for the mentoring ends on
> 19th
> > > > July. So, I request all the experts here to please let me know if
> > you're
> > > > ready to be a mentor. And I assure you, I won't bug you too much in
> > your
> > > > busy scheduler. It's a mandatory rule for the ICFOSS programme -
> > > > http://community.apache.org/mentoringprogramme-icfoss-pilot.html
> > > >
> > > >
> > > > On Wed, Jul 17, 2013 at 6:01 PM, Keith Turner <keith@deenlo.com>
> > wrote:
> > > >
> > > > > On Wed, Jul 17, 2013 at 7:32 AM, Sreejith Ramakrishnan <
> > > > > sreejith.code@gmail.com> wrote:
> > > > >
> > > > > > Wouldn't modifying HDFS in any way mean forking the project?
> > Wouldn't
> > > > > that
> > > > > > have problems in the long run?
> > > > > >
> > > > > >
> > > > > Forking HDFS is not the way to go.  Getting your ideas and patches
> > > > accepted
> > > > > by HDFS is the way to go.
> > > > >
> > > > >
> > > > >
> > > > > >
> > > > > > On Wed, Jul 17, 2013 at 12:04 AM, Sreejith Ramakrishnan <
> > > > > > sreejith.code@gmail.com> wrote:
> > > > > >
> > > > > > > Hey,
> > > > > > >
> > > > > > > I have an idea to tackle this Jira. I've read the dapper
paper
> > and
> > > > > > > currently examining the work done in thrift. Shall I make
a
> > > detailed
> > > > > post
> > > > > > > here?
> > > > > > >
> > > > > > > I'm part of the ICFOSS Joint Mentoring Programme. So if
someone
> > can
> > > > > > please
> > > > > > > be my mentor, I'll be happy to work with you :)
> > > > > > >
> > > > > > > [1]
> > > http://community.apache.org/mentoringprogramme-icfoss-pilot.html
> > > > > > >
> > > > > > > Thank you,
> > > > > > > Sreejith R
> > > > > > >
> > > > > > >
> > > > > > > On Tue, Jul 16, 2013 at 8:46 AM, German Gutierrez <
> > > > > > gutierrezga00@gmail.com
> > > > > > > > wrote:
> > > > > > >
> > > > > > >> On Jul 12, 2013 8:53 PM, "Keith Turner" <keith@deenlo.com>
> > wrote:
> > > > > > >> >
> > > > > > >> > On Thu, Jul 11, 2013 at 11:47 AM, Ajay Bhat <
> > > > a.ajay.bhat@gmail.com>
> > > > > > >> wrote:
> > > > > > >> >
> > > > > > >> > > Thanks Keith. I am looking into it now.
> > > > > > >> > >
> > > > > > >> > > Accumulo has done Dapper design based tracing
and called
> it
> > > > > > >> Cloudtrace.
> > > > > > >> I
> > > > > > >> > > am not aware of the ins and outs of this
and would like to
> > > know
> > > > > more
> > > > > > >> > > indepth about it. Can anyone help out here?
> > > > > > >> > >
> > > > > > >> >
> > > > > > >> > Cloudtrace is an implementation of the ideas mentioned
in
> the
> > > > Dapper
> > > > > > >> paper.
> > > > > > >> >  Its only used by Accumulo at this point.   The
reason I
> > > mentioned
> > > > > the
> > > > > > >> > HBase work is so you could asses the status of
that work.
>  You
> > > > > should
> > > > > > >> > determine if any other work besides the HBase
and Accumulo
> > > efforts
> > > > > > >> exists.
> > > > > > >> >
> > > > > > >> > I can think of a few ways to tackle this problem.
> > > > > > >> >
> > > > > > >> >  1. Modify HDFS to use cloudtrace.  Cloudtrace
is currently
> > > > > > implemented
> > > > > > >> on
> > > > > > >> > top of thrift, HDFS does not use thrift.
> > > > > > >> >  2. Modify HDFS and Accumulo to use HBase  tracing.
> > > > > > >> >  3. Modify HDFS to support hooks for tracing.
 Make
> cloudtrace
> > > use
> > > > > > these
> > > > > > >> > hooks.
> > > > > > >> >  4. Create completely new tracing system
> > > > > > >> >
> > > > > > >> > What are your thoughts on this project?  What
do you hope to
> > > > > > accomplish?
> > > > > > >> > What is your timeframe?
> > > > > > >> >
> > > > > > >> >
> > > > > > >> > > I have checked out the HBase trunk also.
> > > > > > >> > >
> > > > > > >> > >  Some additional info about ASF ICFOSS: The
ASF-ICFOSS
> > > > Programme [
> > > > > > >> > > http://icfoss.org/mentor.html] was conducted
by Luciano
> > > > Resende [
> > > > > > >> > > http://people.apache.org/~lresende] on June
21-23rd, 2013
> > and
> > > > as
> > > > > > >> part of
> > > > > > >> > > the Programme, students are encouraged to
take up an
> Apache
> > > JIRA
> > > > > as
> > > > > > a
> > > > > > >> > > project.
> > > > > > >> > >
> > > > > > >> > >
> > > > > > >> > > On Thu, Jul 11, 2013 at 7:27 PM, Keith Turner
<
> > > keith@deenlo.com
> > > > >
> > > > > > >> wrote:
> > > > > > >> > >
> > > > > > >> > > > Some HBase guys were also looking into
doing something
> w/
> > > > > tracing.
> > > > > > >>  I
> > > > > > >> am
> > > > > > >> > > > not sure what has been done, but it
would be useful to
> > look
> > > > into
> > > > > > >> that.  I
> > > > > > >> > > > linked HBASE-6449 to the Accumulo ticket.
> > > > > > >> > > >
> > > > > > >> > > >
> > > > > > >> > > > On Wed, Jul 10, 2013 at 8:41 PM, Ajay
Bhat <
> > > > > a.ajay.bhat@gmail.com
> > > > > > >
> > > > > > >> > > wrote:
> > > > > > >> > > >
> > > > > > >> > > > > Hi all,
> > > > > > >> > > > >
> > > > > > >> > > > > I had attended the ASF-ICFOSS workshop
held in June.
> > > > > > >> > > > >
> > > > > > http://community.apache.org/mentoringprogramme-icfoss-pilot.html
> > > > > > >> > > > >
> > > > > > >> > > > > I'd like to take up this issue
as a project.
> > > > > > >> > > > > https://issues.apache.org/jira/browse/ACCUMULO-1197
> > > > > > >> > > > > Could someone in the community
act as a mentor for
> this
> > > > > project?
> > > > > > >> The
> > > > > > >> > > > > process of selection is very similar
to GSoC.
> > > > > > >> > > > >
> > > > > > >> > > > > I've checked out the source code
and used Accumulo. I
> > hope
> > > > to
> > > > > > have
> > > > > > >> > > made a
> > > > > > >> > > > > formal proposal by Saturday, July
13th. I'd be happy
> to
> > > get
> > > > > some
> > > > > > >> advice
> > > > > > >> > > > on
> > > > > > >> > > > > how I could get started on it,
and also any minor
> > issues I
> > > > > could
> > > > > > >> work
> > > > > > >> > > on
> > > > > > >> > > > in
> > > > > > >> > > > > the interim.
> > > > > > >> > > > >
> > > > > > >> > > > > Regards,
> > > > > > >> > > > > Ajay
> > > > > > >> > > > >
> > > > > > >> > > >
> > > > > > >> > >
> > > > > > >>
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>

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