Let's require that all nodes should have same swap space SPI. I think we can put @GridSpiConsistencyChecked on file swap space SPI (any other suggestions?).
--Yakov 2016-02-15 23:31 GMT+03:00 Konstantin Margorin <rus...@gmail.com>: > Probably I can handle this ticket, but I want to clarify one thing. > > Suppose dynamic cache with enabled swap should be partitioned between two > nodes with backups=1. First node started with FileSwapSpaceSpi, second with > NoopSwapSpaceSpi. > > How cache should start in this case? > > > On Mon, Feb 15, 2016 at 3:45 PM, Artem Shutak <ashu...@gridgain.com> > wrote: > > > I've created a newbie issue for that: > > https://issues.apache.org/jira/browse/IGNITE-2650. > > > > -- Artem -- > > > > On Wed, Feb 10, 2016 at 8:53 PM, Dmitriy Setrakyan < > dsetrak...@apache.org> > > wrote: > > > > > Artem, > > > > > > I like the option with proper exception in case if a dynamic cache is > > > started with swap enabled while there was no swap configured in Ignite. > > > > > > Starting FileSwapSpaceSpi all the time is not a good option as user > will > > > face the same problem when trying to change to a different SPI. > > > > > > D. > > > > > > On Wed, Feb 10, 2016 at 4:39 AM, Artem Shutak <ashu...@gridgain.com> > > > wrote: > > > > > > > Igniters, > > > > > > > > I've noticed an issue with NoopSwapSpaceSpi and dynamically started > > > cashes. > > > > > > > > We have the following logic on node start: > > > > > > > > if (cfg.getSwapSpaceSpi() == null) { > > > > boolean needSwap = false; > > > > > > > > if (cfg.getCacheConfiguration() != null && > > > > !Boolean.TRUE.equals(cfg.isClientMode())) { > > > > for (CacheConfiguration c : > > > > cfg.getCacheConfiguration()) { > > > > if (c.isSwapEnabled()) { > > > > needSwap = true; > > > > > > > > break; > > > > } > > > > } > > > > } > > > > > > > > cfg.setSwapSpaceSpi(needSwap ? new > FileSwapSpaceSpi() : > > > new > > > > NoopSwapSpaceSpi()); > > > > } > > > > > > > > According to the code above, if IgniteConfiguration doesn't contain > > cache > > > > configurations or all configured caches configured without swap, then > > > node > > > > will be started with NoopSwapSpaceSpi. > > > > As a result in this case, when we start dynamic cache with enabled > swap > > > > then actually swap doesn't work. > > > > > > > > There is simple workaround - user have to explicitly set > > FileSwapSpaceSpi > > > > to configuration. But now, there is no any warning or exception. > > > > > > > > What we can do: > > > > > > > > 1. Throw an exception on dynamic cache start (with swap enabled) > > > > if NoopSwapSpaceSpi is configured. > > > > 2. Actually, I don't see why we need NoopSwapSpaceSpi at all. I > > think > > > we > > > > should configure FileSwapSpaceSpi always if user doesn't provide > any > > > > SwapSpaceSpi explicitly. > > > > > > > > Thoughts? > > > > > > > > Thanks, > > > > -- Artem -- > > > > > > > > > >
