Re: Is there a way to limit # of hadoop tasks per user at runtime?
You can use capacity scheduler also. In that you can create some queues, each of specific capacity. Then you can submit jobs to that specific queue at runtime or you can configure it as direct submission. On Wed, May 22, 2013 at 3:27 AM, Sandy Ryza sandy.r...@cloudera.com wrote: Hi Mehmet, Are you using MR1 or MR2? The fair scheduler, present in both versions, but configured slightly differently, allows you to limit the number of map and reduce tasks in a queue. The configuration can be updated at runtime by modifying the scheduler's allocations file. It also has a feature that automatically maps jobs to queues based on the user submitted them. Here are links to documentation in MR1 and MR2: http://hadoop.apache.org/docs/stable/fair_scheduler.html http://hadoop.apache.org/docs/current/hadoop-yarn/hadoop-yarn-site/FairScheduler.html -Sandy On Tue, May 21, 2013 at 2:43 PM, Mehmet Belgin mehmet.bel...@oit.gatech.edu wrote: Hi Everyone, I was wondering if there is a way for limiting the number of tasks (map+reduce) *per user* at runtime? Using an environment variable perhaps? I am asking this from a resource provisioning perspective. I am trying to come up with a N-token licensing system for multiple users to use our limited hadoop resources simultaneously. That is, when user A checks out 6 tokens, he/she can only run 6 hadoop tasks. If there is no such thing in hadoop, has anyone tried to integrate hadoop with torque/moab (or any other RM or scheduler)? Any advice in that direction will be appreciated :) Thanks in advance, -Mehmet
Re: Is there a way to limit # of hadoop tasks per user at runtime?
The only pain point I'd find with CS in a multi-user environment is its limitation of using queue configs. Its non-trivial to configure a queue per user as CS doesn't provide any user level settings (it wasn't designed for that initially), while in FS you get user level limiting settings for free, while also being able to specify pools (for users, or generally for a property, such as queues). On Thu, May 23, 2013 at 10:55 PM, Amal G Jose amalg...@gmail.com wrote: You can use capacity scheduler also. In that you can create some queues, each of specific capacity. Then you can submit jobs to that specific queue at runtime or you can configure it as direct submission. On Wed, May 22, 2013 at 3:27 AM, Sandy Ryza sandy.r...@cloudera.comwrote: Hi Mehmet, Are you using MR1 or MR2? The fair scheduler, present in both versions, but configured slightly differently, allows you to limit the number of map and reduce tasks in a queue. The configuration can be updated at runtime by modifying the scheduler's allocations file. It also has a feature that automatically maps jobs to queues based on the user submitted them. Here are links to documentation in MR1 and MR2: http://hadoop.apache.org/docs/stable/fair_scheduler.html http://hadoop.apache.org/docs/current/hadoop-yarn/hadoop-yarn-site/FairScheduler.html -Sandy On Tue, May 21, 2013 at 2:43 PM, Mehmet Belgin mehmet.bel...@oit.gatech.edu wrote: Hi Everyone, I was wondering if there is a way for limiting the number of tasks (map+reduce) *per user* at runtime? Using an environment variable perhaps? I am asking this from a resource provisioning perspective. I am trying to come up with a N-token licensing system for multiple users to use our limited hadoop resources simultaneously. That is, when user A checks out 6 tokens, he/she can only run 6 hadoop tasks. If there is no such thing in hadoop, has anyone tried to integrate hadoop with torque/moab (or any other RM or scheduler)? Any advice in that direction will be appreciated :) Thanks in advance, -Mehmet -- Harsh J
Re: Is there a way to limit # of hadoop tasks per user at runtime?
Hi Mehmet, Are you using MR1 or MR2? The fair scheduler, present in both versions, but configured slightly differently, allows you to limit the number of map and reduce tasks in a queue. The configuration can be updated at runtime by modifying the scheduler's allocations file. It also has a feature that automatically maps jobs to queues based on the user submitted them. Here are links to documentation in MR1 and MR2: http://hadoop.apache.org/docs/stable/fair_scheduler.html http://hadoop.apache.org/docs/current/hadoop-yarn/hadoop-yarn-site/FairScheduler.html -Sandy On Tue, May 21, 2013 at 2:43 PM, Mehmet Belgin mehmet.bel...@oit.gatech.edu wrote: Hi Everyone, I was wondering if there is a way for limiting the number of tasks (map+reduce) *per user* at runtime? Using an environment variable perhaps? I am asking this from a resource provisioning perspective. I am trying to come up with a N-token licensing system for multiple users to use our limited hadoop resources simultaneously. That is, when user A checks out 6 tokens, he/she can only run 6 hadoop tasks. If there is no such thing in hadoop, has anyone tried to integrate hadoop with torque/moab (or any other RM or scheduler)? Any advice in that direction will be appreciated :) Thanks in advance, -Mehmet
