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 > > > > > > >> > > > > > > > > > > >> > > > > > > > > > >> > > > > > > > > >> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >
