Hi Ulrich, On Wed, 25 Mar 2020, Ulrich Weigand wrote: > > Hello, > > we're currently investigating to set up a Teuthology cluster to run the > Ceph integration test suite on IBM Z, to improve test coverage on our > platform. > > However, we're not sure what hardware resources are required to do so. The > target configuration should be large enough to comfortably support running > an instance of the full Ceph integration tests. Is there some data > available from your experience with such installations on how large this > cluster needs to be then? > > In particular, what number of nodes, #cpus and memory per node, number > (type/size) of disks that should be attached? > > Thanks for any data / estimates you can provide! I can provide some estimates and general guidance. First, the test suites are currently targetted to run on 'smithi' nodes, which are relatively low-powered x86 1u machines with a single NVMe divided into 4 scratch LVs (+ an HDD for boot + logs). (This is somewhat arbitrary--it's just the hardware we picked so the tests are written to target that.) Each test tends to take anywhere from 15m to 2h to run (with a few outliers that take longer). Each test suite is somewhere between 100 and 400 tests. There are maybe 10 different suites we run with some regularly, with a few (e.g., rados) taking up a larger portion of the machine time. We currently have about 175 healthy smithi in service to support developers. I've been telling the aarch64 folks that we probably want at least 25-50 similarly-sized nodes in order to run the test suites in a reasonable amount of time (e.g., minimal rados suite ~day and not days). I'm not really sure how this maps on the Z hardware, but hopefully this provides some guidance! sage _______________________________________________ Dev mailing list -- dev@xxxxxxx To unsubscribe send an email to dev-leave@xxxxxxx
