Both. You could also mention that it could be useful for HBase as well, but that you aren't planning to do the HBase integration as part of your project. On Jul 17, 2013 2:41 PM, "Sreejith Ramakrishnan" <[email protected]> wrote:
> 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 > <[email protected]>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 < > > [email protected]> 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 > > > <[email protected]>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 [email protected]. > > > > > > > > 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 < > > > > [email protected]> 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 <[email protected]> > > > wrote: > > > > > > > > > > > On Wed, Jul 17, 2013 at 7:32 AM, Sreejith Ramakrishnan < > > > > > > [email protected]> 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 < > > > > > > > [email protected]> 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 < > > > > > > > [email protected] > > > > > > > > > wrote: > > > > > > > > > > > > > > > >> On Jul 12, 2013 8:53 PM, "Keith Turner" <[email protected]> > > > wrote: > > > > > > > >> > > > > > > > > >> > On Thu, Jul 11, 2013 at 11:47 AM, Ajay Bhat < > > > > > [email protected]> > > > > > > > >> 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 < > > > > [email protected] > > > > > > > > > > > > > >> 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 < > > > > > > [email protected] > > > > > > > > > > > > > > > >> > > 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 > > > > > > > >> > > > > > > > > > > > >> > > > > > > > > > > >> > > > > > > > > > >> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >
