PDAC Meeting 2018-04-19

Unknown User (mbutler)

• Configured and set up. Adam has "kicked the tires". Persistent storage has been set up and configured. Jellybean home directories are available. Anyone with NCSA credentials can log in. Jellybean home is available from lsst-dev. Includes a Docker registry. Should already be accessible from the PDAC nodes.
• Did not end up using Samba for the home directory setup. Just plain NFS.
• Not planning to bring up Qserv during this cycle.
• Brian Van Klaveren interested in bringing up imgserv on the commons, able to see Butler repositories on /datasets. Can also bring up dbserv looking at a database on lsst10.

Fritz Mueller

• Unknown User (aloftus) has been working on this. All of the node rework looks like it will be done by next week. Will probably federate the cluster and then roll out the configuration to the rest of the DB nodes. See IHS-940 - Getting issue details... STATUS .
• Existing Docker-deployed DAX services will continue to run for now. Will announce when it is time to switch to the Kubernetes-deployed services.
• Loi Ly has a pending action item of responding to progress made by Unknown User (aloftus).
• Unknown User (mbutler) reports that staff have suggested using the same head node as for the Kubernetes Commons. Currently it's a bare metal machine. Apparently a node could be shared. Discussion leads to decision that we'll spin up a new VM for this instead in the LSST VM infrastructure.
  
  • Fritz Mueller will make a ticket with the requirements for a Kubernetes head node for PDAC - Done: DM-14146
• y

Brian Van Klaveren, Unknown User (xiuqin)

• Looks like it may be desirable to move the DAX services to hardware with SSD storage. Lots of files are written as part of serving requests.
• Discussion of whether a more in-memory model can be adopted (Kian-Tat Lim and Brian Van Klavern).
• Same issue arises for the SUIT services.
• Unknown User (mbutler) Next provisioning round is in October/November. Can this wait? Fritz Mueller: Can we do this sooner for dax01? Unknown User (xiuqin): We can wait the 6 months. Brian Van Klavern: for DAX nodes, favor speed over capacity.
  
  • Fritz Mueller: (step 1) Submit a ticket requesting SSD storage for dax01
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• PDAC Jellybean: use SUIT load-balancer node for now for the necessary pods; request a VM if this is not adequate