Vladimir, What is wrong with a query in PRIMARY_SYNC mode? Why won't it work?
D. On Tue, Apr 18, 2017 at 12:25 AM, Vladimir Ozerov <[email protected]> wrote: > Folks, > > I received a number of complaints from users that our default setting favor > performance at the cost of correctness and subtle behavior. Yesterday I > faced one such situation on my own. > > I started REPLICATED cache on several nodes, put some data, executed simple > SQL and got wrong result. No errors, no warnings. The problem was caused by > default PRIMARY_SYNC mode. WTF, our cache doesn't work out of the box! > > Another widely known examples are data streamer behavior, "read form > backups" + continuous queries. > > I propose to change our defaults to favor *correctness* over performance, > and create good documentation and JavaDocs to explain users how to tune our > product. Proposed changes: > > 1) FULL_SYNC as default; > 2) "readFromBackups=false" as default; > 3) "IgniteDataStreamer.allowOverwrite=true" as default. > > Users should not think how to make Ignite work correctly. It should be > correct out of the box. > > Vladimir. >
