Re: Heads up: next hadoop-2 release
On Sep 6, 2012, at 8:56 PM, Arun C Murthy wrote: Per this discussion and the one on common-dev@ w.r.t. version numbers I'm going to start preparing for hadoop-2.0.2 release by fixing versions/CHANGES.txt etc. Starting this work *now*. FYI. thanks, Arun I should be able to get an RC out in the next couple of days. thanks, Arun -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/
Re: Heads up: next hadoop-2 release
Per this discussion and the one on common-dev@ w.r.t. version numbers I'm going to start preparing for hadoop-2.0.2 release by fixing versions/CHANGES.txt etc. I should be able to get an RC out in the next couple of days. thanks, Arun
Re: Heads up: next hadoop-2 release
On Fri, Aug 31, 2012 at 1:15 PM, Eli Collins e...@cloudera.com wrote: Yea, I think we should nuke 2.1.0-alpha and re-create when we're actually going to do a release. On the HDFS side there's quite a few things already waiting to get out, if it's going to take another 4 or so weeks then would be great to shoot for getting HDFS-3077. Seems doable to me. I'm in the finishing touches stages now, and feeling pretty confident about the basic protocol after a few machine-years of fault injection testing, plus some early test results on a 100 node QA setup. After the current round of open JIRAs goes in, I'll start a sweep for findbugs, removing TODOs, and a adding a few more stress tests. Then I think it will be a good time to propose a merge. -Todd -- Todd Lipcon Software Engineer, Cloudera
Re: Heads up: next hadoop-2 release
Hi Arun et.al. I'd still be grateful if you could share what candidates from 0.23 you would have cherry picked into 2.1.0, maybe the critical ones? I will need to make this analysis at this point. Pointers would be appreciated very much. On Friday, August 31, 2012, Vinod Kumar Vavilapalli wrote: On Aug 31, 2012, at 9:45 AM, Arun C Murthy wrote: Makes sense. The only issue is rejiggering fix-versions, CHANGES.txt etc., but I can do that. My plan to create the RC after 0.23.3 completes the test/integration cycle it's currently in - should be done in the next week or so barring blockers. thanks, Arun In which case shall we just wipe off 2.1.0-alpha for now and branch out only after 0.23.3's cycle is done. I don't expect major features to go in the meanwhile into branch-2 which we don't want in 2.1.0-alpha. Thoughts? Thanks, +Vinod Kumar Vavilapalli Hortonworks Inc. http://hortonworks.com/ -- Best regards, - Andy Problems worthy of attack prove their worth by hitting back. - Piet Hein (via Tom White)
Re: Heads up: next hadoop-2 release
Eli, Good point. Looks like both HDFS MR committers have been lax in maintaining branch-2.1.0-alpha. Lots of stabilization has occurred via branch-2/branch-0.23. Since branch-0.23 is nearly there, I'll go ahead and cherry-pick to branch-2.1.0-alpha - do you mind do the same for HDFS from branch-2 also? thanks, Arun On Aug 30, 2012, at 5:43 PM, Eli Collins wrote: Hey Arun, Are you still planning on releasing this branch? It's been a couple of months and branch-2.1.0-alpha wasn't compiling for a while (had the wrong mvn versions, and YARN-36) so sounds like this branch isn't actually being stabilized? Thanks, Eli On Mon, Jul 9, 2012 at 1:31 PM, Arun C Murthy a...@hortonworks.com wrote: I'll try and shoot for end of month, but will depend on performance work and how much we'll need to get to parity with hadoop-1.x on branch-2 etc., even though hadoop-0.23 was there. Fingers crossed. thanks, Arun On Jul 9, 2012, at 11:59 AM, Eli Collins wrote: Thanks Arun, what do you think the ETA is for the first 2.1.0-alpha RC? On Mon, Jul 9, 2012 at 11:55 AM, Arun C Murthy a...@hortonworks.com wrote: I'm about to create a hadoop-2.0.1-alpha release with a couple of security fixes. Also, I plan to create a branch-2.1.0-alpha for the next release in the hadoop-2 release. So, this way, I can start stabilize that release (performance, bug-fixes etc.) - please be careful, henceforth, while committing to branch-2.1.0-alpha. thanks, Arun On Jun 8, 2012, at 12:08 AM, Arun C Murthy wrote: Folks, I'm considering cutting a hadoop-2.0.1-alpha release within the next four weeks or so with some more major add ons I think we can get done soon: # Auto NN Failover (thanks for the HDFS-3042 merge today Todd) and follow-ons as necessary. # Pending security work for YARN (anything for HDFS w.r.t HA?) # RM Restart (MAPREDUCE-4326) # Container re-use (MAPREDUCE-3902) # Multi-resource scheduling for CS (MAPREDUCE-4327). If you would like others please set the 'Target Version' and I'll watch that list. thanks, Arun -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/
Re: Heads up: next hadoop-2 release
On Fri, Aug 31, 2012 at 8:48 AM, Arun C Murthy a...@hortonworks.com wrote: Eli, Good point. Looks like both HDFS MR committers have been lax in maintaining branch-2.1.0-alpha. Lots of stabilization has occurred via branch-2/branch-0.23. Since branch-0.23 is nearly there, I'll go ahead and cherry-pick to branch-2.1.0-alpha - do you mind do the same for HDFS from branch-2 also? Will do, probably won't get to this today early next week with a plan to spin an RC maybe by the end of week would work? Thanks, Eli thanks, Arun On Aug 30, 2012, at 5:43 PM, Eli Collins wrote: Hey Arun, Are you still planning on releasing this branch? It's been a couple of months and branch-2.1.0-alpha wasn't compiling for a while (had the wrong mvn versions, and YARN-36) so sounds like this branch isn't actually being stabilized? Thanks, Eli On Mon, Jul 9, 2012 at 1:31 PM, Arun C Murthy a...@hortonworks.com wrote: I'll try and shoot for end of month, but will depend on performance work and how much we'll need to get to parity with hadoop-1.x on branch-2 etc., even though hadoop-0.23 was there. Fingers crossed. thanks, Arun On Jul 9, 2012, at 11:59 AM, Eli Collins wrote: Thanks Arun, what do you think the ETA is for the first 2.1.0-alpha RC? On Mon, Jul 9, 2012 at 11:55 AM, Arun C Murthy a...@hortonworks.com wrote: I'm about to create a hadoop-2.0.1-alpha release with a couple of security fixes. Also, I plan to create a branch-2.1.0-alpha for the next release in the hadoop-2 release. So, this way, I can start stabilize that release (performance, bug-fixes etc.) - please be careful, henceforth, while committing to branch-2.1.0-alpha. thanks, Arun On Jun 8, 2012, at 12:08 AM, Arun C Murthy wrote: Folks, I'm considering cutting a hadoop-2.0.1-alpha release within the next four weeks or so with some more major add ons I think we can get done soon: # Auto NN Failover (thanks for the HDFS-3042 merge today Todd) and follow-ons as necessary. # Pending security work for YARN (anything for HDFS w.r.t HA?) # RM Restart (MAPREDUCE-4326) # Container re-use (MAPREDUCE-3902) # Multi-resource scheduling for CS (MAPREDUCE-4327). If you would like others please set the 'Target Version' and I'll watch that list. thanks, Arun -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/
Re: Heads up: next hadoop-2 release
Great, it definitely makes sense on the HDFS side (I was going to merge in everything from branch-2) so if it makes sense for MR/YARN as well then let's just cut a new branch and update all the 2.2.0 fixed jiras to be 2.1.0. Thanks, Eli On Fri, Aug 31, 2012 at 9:45 AM, Arun C Murthy a...@hortonworks.com wrote: Makes sense. The only issue is rejiggering fix-versions, CHANGES.txt etc., but I can do that. My plan to create the RC after 0.23.3 completes the test/integration cycle it's currently in - should be done in the next week or so barring blockers. thanks, Arun On Aug 31, 2012, at 9:40 AM, Todd Lipcon wrote: Should we consider re-branching 2.1.0-alpha off the current branch-2 code, then? Given there's been lots of testing on tip of branch-2, and not much in there that I consider scary, it might be easier to do that than to cherry pick all of the changes individually? Just a thought. -Todd On Fri, Aug 31, 2012 at 9:31 AM, Eli Collins e...@cloudera.com wrote: On Fri, Aug 31, 2012 at 8:48 AM, Arun C Murthy a...@hortonworks.com wrote: Eli, Good point. Looks like both HDFS MR committers have been lax in maintaining branch-2.1.0-alpha. Lots of stabilization has occurred via branch-2/branch-0.23. Since branch-0.23 is nearly there, I'll go ahead and cherry-pick to branch-2.1.0-alpha - do you mind do the same for HDFS from branch-2 also? Will do, probably won't get to this today early next week with a plan to spin an RC maybe by the end of week would work? Thanks, Eli thanks, Arun On Aug 30, 2012, at 5:43 PM, Eli Collins wrote: Hey Arun, Are you still planning on releasing this branch? It's been a couple of months and branch-2.1.0-alpha wasn't compiling for a while (had the wrong mvn versions, and YARN-36) so sounds like this branch isn't actually being stabilized? Thanks, Eli On Mon, Jul 9, 2012 at 1:31 PM, Arun C Murthy a...@hortonworks.com wrote: I'll try and shoot for end of month, but will depend on performance work and how much we'll need to get to parity with hadoop-1.x on branch-2 etc., even though hadoop-0.23 was there. Fingers crossed. thanks, Arun On Jul 9, 2012, at 11:59 AM, Eli Collins wrote: Thanks Arun, what do you think the ETA is for the first 2.1.0-alpha RC? On Mon, Jul 9, 2012 at 11:55 AM, Arun C Murthy a...@hortonworks.com wrote: I'm about to create a hadoop-2.0.1-alpha release with a couple of security fixes. Also, I plan to create a branch-2.1.0-alpha for the next release in the hadoop-2 release. So, this way, I can start stabilize that release (performance, bug-fixes etc.) - please be careful, henceforth, while committing to branch-2.1.0-alpha. thanks, Arun On Jun 8, 2012, at 12:08 AM, Arun C Murthy wrote: Folks, I'm considering cutting a hadoop-2.0.1-alpha release within the next four weeks or so with some more major add ons I think we can get done soon: # Auto NN Failover (thanks for the HDFS-3042 merge today Todd) and follow-ons as necessary. # Pending security work for YARN (anything for HDFS w.r.t HA?) # RM Restart (MAPREDUCE-4326) # Container re-use (MAPREDUCE-3902) # Multi-resource scheduling for CS (MAPREDUCE-4327). If you would like others please set the 'Target Version' and I'll watch that list. thanks, Arun -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Todd Lipcon Software Engineer, Cloudera -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/
Re: Heads up: next hadoop-2 release
Yes, I hope to branch and make the RC Tuesday of next week. There was a flurry of new issues that came up recently. I am now waiting on YARN-60 YARN-66 MAPREDUCE-4612 MAPREDUCE-4611 But I would like to also have in HDFS-3852 MAPREDUCE-4604 HADOOP-8727 --Bobby On 8/31/12 11:45 AM, Arun C Murthy a...@hortonworks.com wrote: Makes sense. The only issue is rejiggering fix-versions, CHANGES.txt etc., but I can do that. My plan to create the RC after 0.23.3 completes the test/integration cycle it's currently in - should be done in the next week or so barring blockers. thanks, Arun On Aug 31, 2012, at 9:40 AM, Todd Lipcon wrote: Should we consider re-branching 2.1.0-alpha off the current branch-2 code, then? Given there's been lots of testing on tip of branch-2, and not much in there that I consider scary, it might be easier to do that than to cherry pick all of the changes individually? Just a thought. -Todd On Fri, Aug 31, 2012 at 9:31 AM, Eli Collins e...@cloudera.com wrote: On Fri, Aug 31, 2012 at 8:48 AM, Arun C Murthy a...@hortonworks.com wrote: Eli, Good point. Looks like both HDFS MR committers have been lax in maintaining branch-2.1.0-alpha. Lots of stabilization has occurred via branch-2/branch-0.23. Since branch-0.23 is nearly there, I'll go ahead and cherry-pick to branch-2.1.0-alpha - do you mind do the same for HDFS from branch-2 also? Will do, probably won't get to this today early next week with a plan to spin an RC maybe by the end of week would work? Thanks, Eli thanks, Arun On Aug 30, 2012, at 5:43 PM, Eli Collins wrote: Hey Arun, Are you still planning on releasing this branch? It's been a couple of months and branch-2.1.0-alpha wasn't compiling for a while (had the wrong mvn versions, and YARN-36) so sounds like this branch isn't actually being stabilized? Thanks, Eli On Mon, Jul 9, 2012 at 1:31 PM, Arun C Murthy a...@hortonworks.com wrote: I'll try and shoot for end of month, but will depend on performance work and how much we'll need to get to parity with hadoop-1.x on branch-2 etc., even though hadoop-0.23 was there. Fingers crossed. thanks, Arun On Jul 9, 2012, at 11:59 AM, Eli Collins wrote: Thanks Arun, what do you think the ETA is for the first 2.1.0-alpha RC? On Mon, Jul 9, 2012 at 11:55 AM, Arun C Murthy a...@hortonworks.com wrote: I'm about to create a hadoop-2.0.1-alpha release with a couple of security fixes. Also, I plan to create a branch-2.1.0-alpha for the next release in the hadoop-2 release. So, this way, I can start stabilize that release (performance, bug-fixes etc.) - please be careful, henceforth, while committing to branch-2.1.0-alpha. thanks, Arun On Jun 8, 2012, at 12:08 AM, Arun C Murthy wrote: Folks, I'm considering cutting a hadoop-2.0.1-alpha release within the next four weeks or so with some more major add ons I think we can get done soon: # Auto NN Failover (thanks for the HDFS-3042 merge today Todd) and follow-ons as necessary. # Pending security work for YARN (anything for HDFS w.r.t HA?) # RM Restart (MAPREDUCE-4326) # Container re-use (MAPREDUCE-3902) # Multi-resource scheduling for CS (MAPREDUCE-4327). If you would like others please set the 'Target Version' and I'll watch that list. thanks, Arun -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Todd Lipcon Software Engineer, Cloudera -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/
Re: Heads up: next hadoop-2 release
On Aug 31, 2012, at 9:45 AM, Arun C Murthy wrote: Makes sense. The only issue is rejiggering fix-versions, CHANGES.txt etc., but I can do that. My plan to create the RC after 0.23.3 completes the test/integration cycle it's currently in - should be done in the next week or so barring blockers. thanks, Arun In which case shall we just wipe off 2.1.0-alpha for now and branch out only after 0.23.3's cycle is done. I don't expect major features to go in the meanwhile into branch-2 which we don't want in 2.1.0-alpha. Thoughts? Thanks, +Vinod Kumar Vavilapalli Hortonworks Inc. http://hortonworks.com/ signature.asc Description: Message signed with OpenPGP using GPGMail
Re: Heads up: next hadoop-2 release
On Fri, Aug 31, 2012 at 12:21 PM, Vinod Kumar Vavilapalli vino...@hortonworks.com wrote: On Aug 31, 2012, at 9:45 AM, Arun C Murthy wrote: Makes sense. The only issue is rejiggering fix-versions, CHANGES.txt etc., but I can do that. My plan to create the RC after 0.23.3 completes the test/integration cycle it's currently in - should be done in the next week or so barring blockers. thanks, Arun In which case shall we just wipe off 2.1.0-alpha for now and branch out only after 0.23.3's cycle is done. I don't expect major features to go in the meanwhile into branch-2 which we don't want in 2.1.0-alpha. Yea, I think we should nuke 2.1.0-alpha and re-create when we're actually going to do a release. On the HDFS side there's quite a few things already waiting to get out, if it's going to take another 4 or so weeks then would be great to shoot for getting HDFS-3077. Thanks, Eli Thoughts? Thanks, +Vinod Kumar Vavilapalli Hortonworks Inc. http://hortonworks.com/
Re: Heads up: next hadoop-2 release
Hey Arun, Are you still planning on releasing this branch? It's been a couple of months and branch-2.1.0-alpha wasn't compiling for a while (had the wrong mvn versions, and YARN-36) so sounds like this branch isn't actually being stabilized? Thanks, Eli On Mon, Jul 9, 2012 at 1:31 PM, Arun C Murthy a...@hortonworks.com wrote: I'll try and shoot for end of month, but will depend on performance work and how much we'll need to get to parity with hadoop-1.x on branch-2 etc., even though hadoop-0.23 was there. Fingers crossed. thanks, Arun On Jul 9, 2012, at 11:59 AM, Eli Collins wrote: Thanks Arun, what do you think the ETA is for the first 2.1.0-alpha RC? On Mon, Jul 9, 2012 at 11:55 AM, Arun C Murthy a...@hortonworks.com wrote: I'm about to create a hadoop-2.0.1-alpha release with a couple of security fixes. Also, I plan to create a branch-2.1.0-alpha for the next release in the hadoop-2 release. So, this way, I can start stabilize that release (performance, bug-fixes etc.) - please be careful, henceforth, while committing to branch-2.1.0-alpha. thanks, Arun On Jun 8, 2012, at 12:08 AM, Arun C Murthy wrote: Folks, I'm considering cutting a hadoop-2.0.1-alpha release within the next four weeks or so with some more major add ons I think we can get done soon: # Auto NN Failover (thanks for the HDFS-3042 merge today Todd) and follow-ons as necessary. # Pending security work for YARN (anything for HDFS w.r.t HA?) # RM Restart (MAPREDUCE-4326) # Container re-use (MAPREDUCE-3902) # Multi-resource scheduling for CS (MAPREDUCE-4327). If you would like others please set the 'Target Version' and I'll watch that list. thanks, Arun -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/
Re: Heads up: next hadoop-2 release
I just created branch-2.1.0-alpha. Please use the 2.2.0-alpha version in jira henceforth for newer features. thanks, Arun
Re: Heads up: next hadoop-2 release
Arun, Thanks for driving this. If we have them in time, can we count to get the following JIRAs in the 2.1.0-alpha release: MAPREDUCE-4417, HADOOP-8581, HDFS-3637 ? Thanks. On Mon, Jul 9, 2012 at 11:55 AM, Arun C Murthy a...@hortonworks.com wrote: I'm about to create a hadoop-2.0.1-alpha release with a couple of security fixes. Also, I plan to create a branch-2.1.0-alpha for the next release in the hadoop-2 release. So, this way, I can start stabilize that release (performance, bug-fixes etc.) - please be careful, henceforth, while committing to branch-2.1.0-alpha. thanks, Arun On Jun 8, 2012, at 12:08 AM, Arun C Murthy wrote: Folks, I'm considering cutting a hadoop-2.0.1-alpha release within the next four weeks or so with some more major add ons I think we can get done soon: # Auto NN Failover (thanks for the HDFS-3042 merge today Todd) and follow-ons as necessary. # Pending security work for YARN (anything for HDFS w.r.t HA?) # RM Restart (MAPREDUCE-4326) # Container re-use (MAPREDUCE-3902) # Multi-resource scheduling for CS (MAPREDUCE-4327). If you would like others please set the 'Target Version' and I'll watch that list. thanks, Arun -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Alejandro
Re: Heads up: next hadoop-2 release
I'm about to create a hadoop-2.0.1-alpha release with a couple of security fixes. Also, I plan to create a branch-2.1.0-alpha for the next release in the hadoop-2 release. So, this way, I can start stabilize that release (performance, bug-fixes etc.) - please be careful, henceforth, while committing to branch-2.1.0-alpha. thanks, Arun On Jun 8, 2012, at 12:08 AM, Arun C Murthy wrote: Folks, I'm considering cutting a hadoop-2.0.1-alpha release within the next four weeks or so with some more major add ons I think we can get done soon: # Auto NN Failover (thanks for the HDFS-3042 merge today Todd) and follow-ons as necessary. # Pending security work for YARN (anything for HDFS w.r.t HA?) # RM Restart (MAPREDUCE-4326) # Container re-use (MAPREDUCE-3902) # Multi-resource scheduling for CS (MAPREDUCE-4327). If you would like others please set the 'Target Version' and I'll watch that list. thanks, Arun -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/
Re: Heads up: next hadoop-2 release
Thanks Arun, what do you think the ETA is for the first 2.1.0-alpha RC? On Mon, Jul 9, 2012 at 11:55 AM, Arun C Murthy a...@hortonworks.com wrote: I'm about to create a hadoop-2.0.1-alpha release with a couple of security fixes. Also, I plan to create a branch-2.1.0-alpha for the next release in the hadoop-2 release. So, this way, I can start stabilize that release (performance, bug-fixes etc.) - please be careful, henceforth, while committing to branch-2.1.0-alpha. thanks, Arun On Jun 8, 2012, at 12:08 AM, Arun C Murthy wrote: Folks, I'm considering cutting a hadoop-2.0.1-alpha release within the next four weeks or so with some more major add ons I think we can get done soon: # Auto NN Failover (thanks for the HDFS-3042 merge today Todd) and follow-ons as necessary. # Pending security work for YARN (anything for HDFS w.r.t HA?) # RM Restart (MAPREDUCE-4326) # Container re-use (MAPREDUCE-3902) # Multi-resource scheduling for CS (MAPREDUCE-4327). If you would like others please set the 'Target Version' and I'll watch that list. thanks, Arun -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/
Re: Heads up: next hadoop-2 release
I'll try and shoot for end of month, but will depend on performance work and how much we'll need to get to parity with hadoop-1.x on branch-2 etc., even though hadoop-0.23 was there. Fingers crossed. thanks, Arun On Jul 9, 2012, at 11:59 AM, Eli Collins wrote: Thanks Arun, what do you think the ETA is for the first 2.1.0-alpha RC? On Mon, Jul 9, 2012 at 11:55 AM, Arun C Murthy a...@hortonworks.com wrote: I'm about to create a hadoop-2.0.1-alpha release with a couple of security fixes. Also, I plan to create a branch-2.1.0-alpha for the next release in the hadoop-2 release. So, this way, I can start stabilize that release (performance, bug-fixes etc.) - please be careful, henceforth, while committing to branch-2.1.0-alpha. thanks, Arun On Jun 8, 2012, at 12:08 AM, Arun C Murthy wrote: Folks, I'm considering cutting a hadoop-2.0.1-alpha release within the next four weeks or so with some more major add ons I think we can get done soon: # Auto NN Failover (thanks for the HDFS-3042 merge today Todd) and follow-ons as necessary. # Pending security work for YARN (anything for HDFS w.r.t HA?) # RM Restart (MAPREDUCE-4326) # Container re-use (MAPREDUCE-3902) # Multi-resource scheduling for CS (MAPREDUCE-4327). If you would like others please set the 'Target Version' and I'll watch that list. thanks, Arun -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/
