346 global delayed write rate #392
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enable sharing the Write Controller across dbs through the db options while still retaining the old behavior. when shared between dbs, the write controller keeps track of all the delay requirements of all cfs in the dbs and enforces on all of them the lowest write rate required. NOTE: plz note that setting a write controller in the options is only valid with use_dynamic_delay = true. Dynamic Delay: CFs wont override each other (#358) Currently, in a setting of multiple cfs, the delayed_write_rate_ value is overridden by the latest cf that entered a delay state. so if a cf registered a delay state that is less severe than the previous cf, it will override the previous value of delayed_write_rate_ with a higher rate than the system should use. fix it by storing the delay requirements of all the CFs in the write controller and only set a new delayed_write_rate_ when its smaller than the min.
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@erez-speedb , plz check that theres no deg in normal suite |
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@Yuval-Ariel where is the issue for this PR? |
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Write Controller is now a shared_ptr option in ImmutableDBOptions which keeps track and enforces all the delay requirements of the cfs in the dbs that those options were passed to.
closes #346