=========================================
#opendaylight-meeting: clustering hackers
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Meeting started by colindixon at 15:08:10 UTC.  The full logs are
available at
http://meetings.opendaylight.org/opendaylight-meeting/2016/clustering_hackers/opendaylight-meeting-clustering_hackers.2016-10-04-15.08.log.html
.



Meeting summary
---------------

* agenda bashing  (colindixon, 15:08:19)
  * LINK: https://git.opendaylight.org/gerrit/#/c/45912/ rovarga asks
    TomP to look into this patch to merge it before merge conflicts
    start to come up  (colindixon, 15:09:30)
  * colindixon and TomP give a once-through and find a few minor things,
    TomP says he's likely to give the benefit of the doubt around which
    parents each pom uses  (colindixon, 15:13:49)

* moving to frontend/backend separation (bug 5280)  (colindixon,
  15:22:13)
  * LINK: https://git.opendaylight.org/gerrit/#/q/message:5280 patches
    (colindixon, 15:22:16)
  * TomP asks about how well it is tested  (colindixon, 15:22:26)
  * rovarga says that the first thing to do is to get the unit tests to
    run  (colindixon, 15:22:55)
  * Muthu and Ashutosh say that a lot of testing (beyond very high
    scale) is already in CSIT  (colindixon, 15:23:20)
  * the very high scale seems to have issues which are hard to figure
    out if they are the data store or the OpenFlow plugin  (colindixon,
    15:24:34)
  * rovarga also says that his take is that there should be at least one
    test case on BGP that would hopefully go back to passing
    (colindixon, 15:25:01)
  * TomP and rovarga discuss cherry-picking the patches back to Boron,
    and when to flip the switch to use the new back end  (colindixon,
    15:35:48)
  * TomP seems to think flipping the switch in SR2 is more sane right
    now givent that SR1 is ~3 weeks out  (colindixon, 15:36:12)
  * rovarga says the key point is that the switch-over shoudl really be
    a config option, not a code option, so no special build shoudl be
    required  (colindixon, 15:39:24)

* carbon planning  (colindixon, 15:44:35)
  * there is some work on sharding to be able to use pluggable back-ends
    with Erricsson folks interested in using cassandra to back some
    shards  (colindixon, 15:45:13)
  * it looks like the plan is augment the existing models with RPCs that
    would then call back into the backing data store without going
    through the MD-SAL data store  (colindixon, 15:46:01)
  * rovarga says he'd really like to see it go through the conceptual
    data tree APIs instead of just using their own RPCs to get the
    current benefits of things, e.g., visibility to RESTCONF
    (colindixon, 15:46:37)
  * ashutosh says that he agrees, but that at some point if you need
    performance, it might be worth a trade-off where you lose visibility
    to RESTCONF and data sharing in exchange for performance
    (colindixon, 15:50:17)
  * TomP asks if this is upstreamed, Ashutosh says the discussion is
    happening in the open, TomP asks what project this is looking to
    modify and if the modifications are happening upstream or not
    (colindixon, 15:51:09)
  * ashutosh says that the bascially, they don't have confidence that
    the conceptual data tree API will give them the flexibility they
    need to deliver the performance and scale they need, so they're
    focusing on bypassing things for now  (colindixon, 15:55:46)
  * ashutosh points out for instance that needing to replicate all the
    data you need on all nodes where you might want a notificaiton would
    be real problem for scale  (colindixon, 15:56:38)
  * rovarga, TomP and ashutosh talk about how the conceptual data tree
    would work and how it might work for the given use case, ashutosh
    asks questions around if there is still a shard leader  (colindixon,
    15:57:51)
  * ashutosh says that in the long-run if the conceptual data tree
    becomes real, they'll move to it, but now they want to do something
    *now* and the conceptual data tree isn't yet done  (colindixon,
    16:00:25)
  * muthu asks if this stuff was part of the summit presentations,
    rovarga says yes  (colindixon, 16:02:21)

* jumping to MD-SAL call  (colindixon, 16:02:53)
  * since I'm the only one taking notes, the notes might not reflect
    things after that  (colindixon, 16:03:06)



Meeting ended at 16:03:10 UTC.



People present (lines said)
---------------------------

* colindixon (30)
* odl_meetbot (4)



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