Hi John, I have posted the same Q on azkaban google group but there is no response so far :( If i want to do the old school way of monitor, alert and start the process somewhere else..how can I do this? Are there some ready made tools to do this kind of general purpose monitoring and alerting for services on linux?
On Sun, Aug 16, 2015 at 9:38 AM, Prem Yadav <ipremya...@gmail.com> wrote: > The MySQL is there just to save the state of things. I suppose it very > lightweight. Why not just install mysql on one of the nodes or a VM > somewhere. > > > On Sun, Aug 16, 2015 at 3:39 PM, John Wong <gokoproj...@gmail.com> wrote: > >> Sorry i meant integration with Cassandra (based on the docs by default it >> suggests MySQL) >> >> >> On Sunday, August 16, 2015, John Wong <gokoproj...@gmail.com> wrote: >> >>> There is no leader in cassandra. I suggest you ask Azkaban community >>> about intgteation with Azkaban and Azkaban HA. >>> >>> On Sunday, August 16, 2015, Vikram Kone <vikramk...@gmail.com> wrote: >>> >>>> Can't we use zoo keeper for leader election in Cassandra and based on >>>> who is leader ..run azkaban or any app instance for that matter on that >>>> Cassandra server. I'm thinking that I can copy the applocation folder to >>>> all nodes and then determine which one to run using zookeeper. Is that >>>> possible ? >>>> >>>> Sent from Outlook <http://aka.ms/Ox5hz3> >>>> >>>> >>>> >>>> >>>> On Sun, Aug 16, 2015 at 6:47 AM -0700, "John Wong" < >>>> gokoproj...@gmail.com> wrote: >>>> >>>> Hi >>>>> >>>>> I am not familiar with Azkaban and probably a better question to the >>>>> Azkaban community IMO. But there seems to be two modes ( >>>>> http://azkaban.github.io/azkaban/docs/2.5/) one is solo and one is >>>>> two-server mode, but either way I think still SPOF? If there is no >>>>> election, just based on process, my 2 cents would be monitor, alert, and >>>>> start the process somewhere else. Better yet, don't install the process on >>>>> Cassandra node. Keep your instance for one purpose only. If you run cloud >>>>> like AWS you will be able to autoscale min1 max1 easily. >>>>> >>>>> >>>>> Note: In peer-to-peer architecture, there is simply no concept of >>>>> master. You can start with some seed nodes for discovery. It depends how >>>>> you design discovery. >>>>> >>>>> On Sat, Aug 15, 2015 at 11:49 AM, Vikram Kone <vikramk...@gmail.com> >>>>> wrote: >>>>> >>>>>> Hi, >>>>>> We are planning to install Azkaban in solo server mode on a 24 >>>>>> node cassandra cluster to be able to schedule spark jobs with intricate >>>>>> dependency chain. The problem, is since Cassandra has a no-SPOF >>>>>> architecture ie any node can become the master for the cluster, it >>>>>> creates >>>>>> the problem for Azkaban master since it's not a peer-peer architecture >>>>>> where any node can become the master. Only a single mode has to be master >>>>>> at any given time. >>>>>> >>>>>> What are our options here? Are there any framworks or tools out there >>>>>> that would allow any application to run on a cluster of machines with >>>>>> high >>>>>> availablity? >>>>>> Should I be looking at something like zookeeper for this ? Or Mesos >>>>>> may be? >>>>> >>>>> >>>>> >>> >>> -- >>> Sent from Jeff Dean's printf() mobile console >>> >> >> >> -- >> Sent from Jeff Dean's printf() mobile console >> > >
