Displaying #cassandra-dev/2016-12-14.log:

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Wed Dec 14 14:27:06 2016  jasobrown:with ccm, if i want to pass special -D args to a specific instance, what file in the node's directory do i update?
Wed Dec 14 14:27:17 2016  jasobrown:i see that bin/cassandra gets updated on every bounce
Wed Dec 14 14:28:01 2016  jasobrown:ahh, i guess just conf/cassandra-env.sh ?
Wed Dec 14 14:28:19 2016  marcuse:yep
Wed Dec 14 14:28:32 2016  jasobrown:marcuse: thanks for confirming
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Wed Dec 14 16:07:44 2016  urandom:it seems really common to hear people say that you should "disable read repair when using DTCS/TWCS", am i missing something, or should that read more like "disable read_repair_chance, and only query at CL {LOCAL_}ONE"?
Wed Dec 14 16:08:06 2016  urandom:there isn't anyway to truly disable read repair, is there?
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Wed Dec 14 16:13:01 2016  iamaleksey:you can set RRC and local RRC both to zero; but you'd still have RR on mismatch
Wed Dec 14 16:13:59 2016  urandom:iamaleksey: which still requires CL > ONE, right?
Wed Dec 14 16:14:21 2016  iamaleksey:to trigger? yes
Wed Dec 14 16:14:26 2016  urandom:right
Wed Dec 14 16:14:41 2016  urandom:so i assume this is what people implicitly mean when they say "disable read repair"
Wed Dec 14 16:14:42 2016  iamaleksey:there might also be some interactions with spec retry
Wed Dec 14 16:14:53 2016  iamaleksey:I don't remember anymore
Wed Dec 14 16:14:55 2016  urandom:iamaleksey: oh right, good point
Wed Dec 14 16:14:59 2016  iamaleksey:so might have to disable that too
Wed Dec 14 16:19:58 2016  spodkowinski:there was also a related discussion in #10726
Wed Dec 14 16:20:00 2016  CassBotJr:https://issues.apache.org/jira/browse/CASSANDRA-10726 (Open; Unresolved; Unscheduled): "Read repair inserts should not be blocking"
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Wed Dec 14 16:25:28 2016  iamaleksey:yes; there is a bunch of somewhat broken things in read coordination code, fwiw
Wed Dec 14 16:25:47 2016  iamaleksey:I've catalogued them somewhere while investigating TPC
Wed Dec 14 16:26:11 2016  iamaleksey:none of them outright bugs, so never had time to fix them up, but should probably open JIRAs for those who have time
Wed Dec 14 16:27:21 2016  iamaleksey:like speculative retry with local cls speculating on irrelevant replicas for LOCAL_CLs
Wed Dec 14 16:27:27 2016  iamaleksey:potentially
Wed Dec 14 16:38:30 2016  spodkowinski:i'm also not so sure if the RR logic really ensures "monotonic quorum reads" as described in the ticket in case of LOCAL_QUORUM
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Wed Dec 14 16:38:59 2016  spodkowinski:looks like the full data read will be issues for ALL while blockfor will be getContactedReplicas().size()
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Wed Dec 14 22:53:04 2016  aweisberg:LegacyHintsMigrator, LegacySchemaMigrator, and LegacyBatchlogMigrator are all going away in 4.0 along with the information about their system tables right?
Wed Dec 14 23:02:11 2016  thobbs:I think so, yes
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Wed Dec 14 23:04:20 2016  jkni:I think they're already gone post #12716
Wed Dec 14 23:04:21 2016  aweisberg:thobbs: Nice. Dropping the hammer.
Wed Dec 14 23:04:21 2016  CassBotJr:https://issues.apache.org/jira/browse/CASSANDRA-12716 (Resolved; Fixed; 4.0): "Remove pre-3.0 compatibility code for 4.0"
Wed Dec 14 23:04:22 2016  jkni:on trunk
Wed Dec 14 23:05:17 2016  aweisberg:Ah, well I branched a week before so I am going to have a fun time.
Wed Dec 14 23:05:41 2016  aweisberg:Guess I'll rebase before digging this hole any deeper.
Wed Dec 14 23:05:50 2016  jkni:Probably a wise idea
Wed Dec 14 23:06:42 2016  jkni:That'll get you Thrift removal too
Wed Dec 14 23:06:50 2016  jkni:Heads up that you may be affected by #11107
Wed Dec 14 23:06:51 2016  CassBotJr:https://issues.apache.org/jira/browse/CASSANDRA-11107 (Reopened; Unresolved; Unscheduled): "Add native_transport_address and native_transport_broadcast_address yaml options"
Wed Dec 14 23:06:59 2016  jkni:I'll be finishing the patch for that soon
Wed Dec 14 23:07:29 2016  jkni:(note that the issue has been transformed into "move the thrift options to native transport options" instead of handling both)
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Wed Dec 14 23:34:31 2016  zznate:aweisberg Alexi is getting close with CASSANDRA-9425 - that might have some overlap as well
Wed Dec 14 23:34:33 2016  CassBotJr:https://issues.apache.org/jira/browse/CASSANDRA-9425 (Patch Available; Unresolved; 4.0): "Make node-local schema fully immutable"
Wed Dec 14 23:35:20 2016  aweisberg:zznate: Thanks yes I'll have to take a look. I am working on adding the new columns and migrating from the old schema today.
Wed Dec 14 23:37:39 2016  driftx:*Aleksey*
Wed Dec 14 23:37:52 2016  driftx:careful, people have died from misspelling that before.
Wed Dec 14 23:38:11 2016  aweisberg:Heh, yeah I thought you meant someone else.
Wed Dec 14 23:38:14 2016  iamaleksey:haven't hear this version before; for that, I'll let this slide
Wed Dec 14 23:38:37 2016  aweisberg:iamaleksey: Schema change is going to be easy now right? Your making the world a better place.
Wed Dec 14 23:39:11 2016  iamaleksey:when everything is there. the first commit is boring bullshit refactors and a ton of not strictly necessary renames and moves
Wed Dec 14 23:39:23 2016  iamaleksey:but we'll get there by 4.0
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