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Cherry pick #3627 from Cadence #839

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Merged
merged 5 commits into from
Oct 19, 2020
Merged

Cherry pick #3627 from Cadence #839

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fa170ca
Update ttl max value (#3627)
yux0 Oct 12, 2020
967be8d
Set Cassandra TTL to be 10 years max
wxing1292 Oct 12, 2020
93c7a2a
Merge branch 'master' into ttl
wxing1292 Oct 13, 2020
b7b2571
Merge branch 'master' into ttl
wxing1292 Oct 13, 2020
84512a3
Merge branch 'master' into ttl
wxing1292 Oct 13, 2020
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3 changes: 2 additions & 1 deletion common/persistence/cassandra/cassandraVisibilityPersistence.go
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Expand Up @@ -44,7 +44,8 @@ const (
defaultCloseTTLSeconds = 86400
openExecutionTTLBuffer = int64(86400) // setting it to a day to account for shard going down

maxCassandraTTL = int64(630720000) // Cassandra TTL maximum, 20 years in second
// ref: https://docs.datastax.com/en/dse-trblshoot/doc/troubleshooting/recoveringTtlYear2038Problem.html
maxCassandraTTL = int64(315360000) // Cassandra max support time is 2038-01-19T03:14:06+00:00. Updated this to 10 years to support until year 2028
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@alexshtin alexshtin Oct 13, 2020 •
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Why not:

func maxCassandraTTL() int64 { 
    return (time.Date(2038,01,19,03,14,06,0,time.UTC).Sub(time.Now().UTC())).Milliseconds()
}

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@alexshtin alexshtin Oct 13, 2020

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We have default timeouts of 10 years.

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@wxing1292 wxing1292 Oct 13, 2020

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depending on whether we are still going to support Cassandra after 10 years
the solution from uber is much more simpler.

@samarabbas what do you think?

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@samarabbas samarabbas Oct 13, 2020

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Agreed with @wxing1292. The main issue is we need a concept of infinite timeout in Temporal. Using a default of 10 years introduces a scalability bottleneck. Here are couple of issues tracking this:
#358
#573

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@alexshtin alexshtin Oct 13, 2020

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This is not even 10 but 8 years. I don't understand why they picked up some random number instead of properly set to the real limit Cassandra gives us. It is used in 2 places only.

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@wxing1292 wxing1292 Oct 13, 2020

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well, I guess as long as the time is really long (far in the future), then it is ok? BTW, cadence picked 5 years...

)

const (
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