Re: Is it possible to let the jobs roam in a node cluster?
Any chance of open sourcing it? On Tuesday, January 22, 2013 10:57:52 PM UTC, Stephen Connolly wrote: My employers have an enterprise plugin that implements an even load strategy, whereby unused slaves are preferred to slaves where the project previously built.
Re: Is it possible to let the jobs roam in a node cluster?
Not my call. On 23 January 2013 12:13, liam.j.bennett liam.j.benn...@gmail.com wrote: Any chance of open sourcing it? On Tuesday, January 22, 2013 10:57:52 PM UTC, Stephen Connolly wrote: My employers have an enterprise plugin that implements an even load strategy, whereby unused slaves are preferred to slaves where the project previously built.
Re: Is it possible to let the jobs roam in a node cluster?
I think this subject has come up several times. I know I have suffered with it for a long time myself. I can see situations where each method would be suitable so we should be able to configure it both globally at the label-level. So for example nodes with the label labelA have roaming mode set to build on last node and nodes with label labelB have roaming mode set to build on any available. I would suggest this for a plugin but it is likely to also require core changes. On Monday, January 21, 2013 8:01:01 PM UTC, Jan Seidel wrote: Sorry for the late reply. I did lose this thread out of sight due to serious workload going on here... Mike got it right. The jobs will stay in the build queue and wait for a machine even if 15 executors on other machines are ready to go. The approach Mike suggests is not really feasible. There are 200 jobs running on the cluster. It would be insane to set up slaves with 1 or a few executors and restrict the jobs. I would never stop to reconfigure as the setup changes in a very agile manner. And Jenkins is overstressed with too many slaves on one machine. I am facing troubles with offline slaves if a machine has 8-10 slaves running. The result is that I have to start them manually -.- So more slaves on one machine is not the solution. Rather fewer with more executors to make sure an executor is available at all times. But that is IMHO a bit insane and pretty upsetting to see one or two machines drowning in build jobs while the other also could compute for SETI as they ain't utilized. I am now trying to reconfigure the entire job topology to get as many jobs of a specific type running on one machine with also comes along with restrictions. Still no joy but I may be able to make it a bit more comfy. Any ideas would still be appreciate though. Cheers Jan Am Donnerstag, 5. April 2012 11:59:07 UTC+2 schrieb Jan Seidel: Hi there, my question is already stated in the title as you can see :) I know that you can let jobs roam in a node cluster but can you let it REALLY ROAM? Jenkins tries to let jobs build on nodes which already have been used for building that particular job. That clutters some build queues while other nodes are picking nose. The idea was probably to preserve disk space. But I don't need that intention. Unimportant jobs delete their entire workspace upon finish while the important ones store everything until next run. These important jobs have a separate harddisk with loads of space. I have not only several executors running on each sever but also up to 3 instances of jenkins slaves for better usage of system ressources and to box very special jobs. Each slave instance is located on its own harddisk. That way do the special jobs and the slaves have exclusive access to ressources and the jobs may roam in their very own realm. Sounds a bit weird but works perfect except for this '*%%§# preferences to build on the same node that has build the job before. The excessive use of the harddisk slows all the builds in a senseless way as the bus reaches the capacity limit on spikes which happen if several jobs spawn at the same time and updates their workspace while there still are loads of unused ressources available on other machines -.- I see at the moment just one solution: split the cluster into more slaves with less executors and reassign the jobs. But that is counteracting my idea a bit as this turns from performance improvement, scalability and convenient usability to further performance improvement and alleviated administration. Has someone an idea how to remove this preference of Jenkins and simply let the jobs build where most executors are available? Cheers Jan
Re: Is it possible to let the jobs roam in a node cluster?
My employers have an enterprise plugin that implements an even load strategy, whereby unused slaves are preferred to slaves where the project previously built. On Monday, 21 January 2013, Jan Seidel wrote: Sorry for the late reply. I did lose this thread out of sight due to serious workload going on here... Mike got it right. The jobs will stay in the build queue and wait for a machine even if 15 executors on other machines are ready to go. The approach Mike suggests is not really feasible. There are 200 jobs running on the cluster. It would be insane to set up slaves with 1 or a few executors and restrict the jobs. I would never stop to reconfigure as the setup changes in a very agile manner. And Jenkins is overstressed with too many slaves on one machine. I am facing troubles with offline slaves if a machine has 8-10 slaves running. The result is that I have to start them manually -.- So more slaves on one machine is not the solution. Rather fewer with more executors to make sure an executor is available at all times. But that is IMHO a bit insane and pretty upsetting to see one or two machines drowning in build jobs while the other also could compute for SETI as they ain't utilized. I am now trying to reconfigure the entire job topology to get as many jobs of a specific type running on one machine with also comes along with restrictions. Still no joy but I may be able to make it a bit more comfy. Any ideas would still be appreciate though. Cheers Jan Am Donnerstag, 5. April 2012 11:59:07 UTC+2 schrieb Jan Seidel: Hi there, my question is already stated in the title as you can see :) I know that you can let jobs roam in a node cluster but can you let it REALLY ROAM? Jenkins tries to let jobs build on nodes which already have been used for building that particular job. That clutters some build queues while other nodes are picking nose. The idea was probably to preserve disk space. But I don't need that intention. Unimportant jobs delete their entire workspace upon finish while the important ones store everything until next run. These important jobs have a separate harddisk with loads of space. I have not only several executors running on each sever but also up to 3 instances of jenkins slaves for better usage of system ressources and to box very special jobs. Each slave instance is located on its own harddisk. That way do the special jobs and the slaves have exclusive access to ressources and the jobs may roam in their very own realm. Sounds a bit weird but works perfect except for this '*%%§# preferences to build on the same node that has build the job before. The excessive use of the harddisk slows all the builds in a senseless way as the bus reaches the capacity limit on spikes which happen if several jobs spawn at the same time and updates their workspace while there still are loads of unused ressources available on other machines -.- I see at the moment just one solution: split the cluster into more slaves with less executors and reassign the jobs. But that is counteracting my idea a bit as this turns from performance improvement, scalability and convenient usability to further performance improvement and alleviated administration. Has someone an idea how to remove this preference of Jenkins and simply let the jobs build where most executors are available? Cheers Jan
Re: Is it possible to let the jobs roam in a node cluster?
Sorry for the late reply. I did lose this thread out of sight due to serious workload going on here... Mike got it right. The jobs will stay in the build queue and wait for a machine even if 15 executors on other machines are ready to go. The approach Mike suggests is not really feasible. There are 200 jobs running on the cluster. It would be insane to set up slaves with 1 or a few executors and restrict the jobs. I would never stop to reconfigure as the setup changes in a very agile manner. And Jenkins is overstressed with too many slaves on one machine. I am facing troubles with offline slaves if a machine has 8-10 slaves running. The result is that I have to start them manually -.- So more slaves on one machine is not the solution. Rather fewer with more executors to make sure an executor is available at all times. But that is IMHO a bit insane and pretty upsetting to see one or two machines drowning in build jobs while the other also could compute for SETI as they ain't utilized. I am now trying to reconfigure the entire job topology to get as many jobs of a specific type running on one machine with also comes along with restrictions. Still no joy but I may be able to make it a bit more comfy. Any ideas would still be appreciate though. Cheers Jan Am Donnerstag, 5. April 2012 11:59:07 UTC+2 schrieb Jan Seidel: Hi there, my question is already stated in the title as you can see :) I know that you can let jobs roam in a node cluster but can you let it REALLY ROAM? Jenkins tries to let jobs build on nodes which already have been used for building that particular job. That clutters some build queues while other nodes are picking nose. The idea was probably to preserve disk space. But I don't need that intention. Unimportant jobs delete their entire workspace upon finish while the important ones store everything until next run. These important jobs have a separate harddisk with loads of space. I have not only several executors running on each sever but also up to 3 instances of jenkins slaves for better usage of system ressources and to box very special jobs. Each slave instance is located on its own harddisk. That way do the special jobs and the slaves have exclusive access to ressources and the jobs may roam in their very own realm. Sounds a bit weird but works perfect except for this '*%%§# preferences to build on the same node that has build the job before. The excessive use of the harddisk slows all the builds in a senseless way as the bus reaches the capacity limit on spikes which happen if several jobs spawn at the same time and updates their workspace while there still are loads of unused ressources available on other machines -.- I see at the moment just one solution: split the cluster into more slaves with less executors and reassign the jobs. But that is counteracting my idea a bit as this turns from performance improvement, scalability and convenient usability to further performance improvement and alleviated administration. Has someone an idea how to remove this preference of Jenkins and simply let the jobs build where most executors are available? Cheers Jan
Re: Is it possible to let the jobs roam in a node cluster?
2012/4/6 Les Mikesell lesmikes...@gmail.com: No, he is saying that after jobs have been run, subsequent runs will queue waiting for the node that did the previous build instead of migrating to an available node even if it is a long wait. I think if that node is down or disconnected, the job would go to a different one immediately, but if it is just busy the job stays in the queue for it no matter how deep the queue gets. In the case of a big source checkout with a small update, it might be worth the wait but I don't know if there is any way to control the behavior when that's not the case. Odd, I have never seen that behavior. Even for Jenkins instances where I have multiple executors for slaves, I have never seen builds hang in the queue if there is a free executor on a slave they can run on. According to my understanding Jenkins will prefer to run a build on a slave that already has the sources for the build checked out, but if such an executor on such a slave is not free, it should not keep the build in the queue if it can immediately use another slave. -- Sami
Re: Is it possible to let the jobs roam in a node cluster?
On Fri, Apr 6, 2012 at 2:41 PM, Sami Tikka sjti...@gmail.com wrote: So what you are saying is that hard disk is becoming the bottleneck for you if there are multiple builds running at the same time even if you have free slaves picking their nose? It sounds to me like you can solve your problem by setting number of executors in each slave to 1. At work I have 20 slaves each with 1 executor and the builds REALLY ROAM :) No, he is saying that after jobs have been run, subsequent runs will queue waiting for the node that did the previous build instead of migrating to an available node even if it is a long wait. I think if that node is down or disconnected, the job would go to a different one immediately, but if it is just busy the job stays in the queue for it no matter how deep the queue gets. In the case of a big source checkout with a small update, it might be worth the wait but I don't know if there is any way to control the behavior when that's not the case. -- Les Mikesell lesmikes...@gmail.com
Re: Is it possible to let the jobs roam in a node cluster?
On Thu, Apr 5, 2012 at 4:59 AM, Jan Seidel wakkal...@gmail.com wrote: Hi there, my question is already stated in the title as you can see :) I know that you can let jobs roam in a node cluster but can you let it REALLY ROAM? Jenkins tries to let jobs build on nodes which already have been used for building that particular job. That clutters some build queues while other nodes are picking nose. The idea was probably to preserve disk space. But I don't need that intention. Not so much that as to let SCM updates work so you don't need to wait for a full checkout of large jobs for the next build which will typically have a small change. Unimportant jobs delete their entire workspace upon finish while the important ones store everything until next run. These important jobs have a separate harddisk with loads of space. I have not only several executors running on each sever but also up to 3 instances of jenkins slaves for better usage of system ressources and to box very special jobs. Each slave instance is located on its own harddisk. That way do the special jobs and the slaves have exclusive access to ressources and the jobs may roam in their very own realm. Sounds a bit weird but works perfect except for this '*%%§# preferences to build on the same node that has build the job before. The excessive use of the harddisk slows all the builds in a senseless way as the bus reaches the capacity limit on spikes which happen if several jobs spawn at the same time and updates their workspace while there still are loads of unused ressources available on other machines -.- I see at the moment just one solution: split the cluster into more slaves with less executors and reassign the jobs. But that is counteracting my idea a bit as this turns from performance improvement, scalability and convenient usability to further performance improvement and alleviated administration. Has someone an idea how to remove this preference of Jenkins and simply let the jobs build where most executors are available? Normally the initial distribution would be more random in the first place - perhaps you started with one node and built all the jobs before adding others. All of our jobs are tied to labels, so if we remove the labels from a node, all of its jobs will do their next build on one of the others. You could force jobs to move with a 'restrict to' a different node, or force some separation by using several labels just to make them spread out, but I don''t know of a more dynamic approach. I think what you need is a way to specify in the job that jenkins should clean up and forget where it ran last for the jobs where you want that behavior. -- Les Mikesell lesmikes...@gmail.com
