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| rakhmerov | ok | 04:48 |
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| rakhmerov | apetrich: hi, ok, got it :) | 10:09 |
| apetrich | rakhmerov, I also got some pings from other people saying that on deployments over 300 nodes the engine is taking too long and asking if we are able to run more | 10:10 |
| rakhmerov | apetrich: 300 nodes of what? ) | 10:16 |
| rakhmerov | of OpenStack being deployed by TripleO? | 10:17 |
| rakhmerov | and what does it mean "the engine is taking too long"? | 10:17 |
| apetrich | rakhmerov, 300 compute nodes I assume | 10:17 |
| rakhmerov | ok | 10:17 |
| rakhmerov | well, you can run multiple Mistral engines, sure | 10:18 |
| apetrich | rakhmerov, yeah I just didn't find in the docs | 10:18 |
| d0ugal | apetrich: I suspect it is more a limitation of the workflow design | 10:18 |
| apetrich | rakhmerov, any caveats of doing that? | 10:18 |
| d0ugal | apetrich: Which workflow is slow? | 10:18 |
| rakhmerov | even for for our (Nokia CloudBand's) crazy loads we are able to run ~10 Mistral engines | 10:18 |
| rakhmerov | with a higher number of engines scalability drops down seriously because of the legacy scheduler that uses DB intensively | 10:19 |
| rakhmerov | we're eliminating this narrow place now | 10:19 |
| d0ugal | apetrich: We mostly run one workflow at a time and they are mostly linear | 10:19 |
| rakhmerov | for TripleO I guess you can run much more than 10 engines easily | 10:20 |
| rakhmerov | d0ugal: ooh, if they are mostly linear then it may not make too much sense | 10:20 |
| rakhmerov | apetrich: it's pretty straightforward how to run multiple engines. Just do "mistral-server --server engine --config-file ..." | 10:21 |
| apetrich | d0ugal rakhmerov, I know :( I'm just doing some follow up. I think right now is more of lab question that they are investigating something. I really don't know all the details | 10:22 |
| rakhmerov | when I'm testing locally I run one process as "mistral-server --server api,engine --config-file ..." (assuming that executor is configured as local) and some number of processes run as "mistral-server --server engine --config-file ..." | 10:22 |
| d0ugal | apetrich: send them to me :-D | 10:22 |
| rakhmerov | pointing (in my case) to the same config file | 10:22 |
| rakhmerov | apetrich: yeah, then you can tell them "yes, you can run many engines" :) | 10:22 |
| apetrich | d0ugal, sent | 10:23 |
| rakhmerov | if needed, I can help with that | 10:23 |
| apetrich | rakhmerov, cheers | 10:23 |
| rakhmerov | they can talk to me directly or someone else from the team | 10:23 |
| rakhmerov | sure, no problem | 10:23 |
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| openstackgerrit | ali proposed openstack/mistral master: moved generic util functions from mistral to mistral-lib https://review.opendev.org/676373 | 12:33 |
| openstackgerrit | Eyal proposed openstack/mistral master: moved generic util functions from mistral to mistral-lib https://review.opendev.org/676373 | 12:46 |
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