Hi all, I'd like to suggest to change default WALMode. Currently we have: DEFAULT (write and fsync), LOG_ONLY (write without fsync), BACKGROUND, NONE.
It turns out that fsyncs in current DEFAULT mode significantly restricts Ignite performance. Compared to LOG_ONLY, it offers additional guarantees that data won't be lost in case of OS or hardware failure, but such guarantees aren't needed very often, and tradeoff is too big. I suggest to rename current DEFAULT to STRICT and make LOG_ONLY new default mode. We can leave DEFAULT as @Deprecated and treat it as STRICT, so that users with old configs will have the same behaviour. What do you think? On Fri, Feb 16, 2018 at 12:35 AM, Denis Magda <dma...@apache.org> wrote: > Vladimir, > > I would suggest not to do this because we still need to spend time on > testing, documentation, etc. If someone shows interest in this features > they can assemble binaries from the master. > > -- > Denis > > On Thu, Feb 15, 2018 at 6:43 AM, Nikolay Izhikov <nizhi...@apache.org> > wrote: > > > +1 > > > > В Чт, 15/02/2018 в 17:27 +0300, Vladimir Ozerov пишет: > > > Igniters, > > > > > > AI 2.4 release was shifted a bit and over this time we implemented two > > > important SQL features: > > > 1) COPY command for fast file upload to the cluster [1] > > > 2) Streaming mode for thin driver [2] > > > > > > Both commands are very important for fast data ingestion into Ignite > > > through SQL. I would like to ask community to consider to include these > > two > > > features into AI 2.4 in *experimental* state because both of them will > be > > > improved in various ways in the nearest time. If we do so, we will be > > able > > > to collect some feedback from the users before AI 2.5 release. What do > > you > > > think? > > > > > > Vladimir. > > > > > > [1] https://issues.apache.org/jira/browse/IGNITE-6917 > > > [2] https://issues.apache.org/jira/browse/IGNITE-7253 > > > > > > On Tue, Feb 13, 2018 at 1:22 AM, Dmitriy Setrakyan < > > dsetrak...@apache.org> > > > wrote: > > > > > > > On Mon, Feb 12, 2018 at 9:22 AM, Dmitry Pavlov < > dpavlov....@gmail.com> > > > > wrote: > > > > > > > > > Hi, > > > > > > > > > > Unfortunately, a quick fix did not give us too much performance > > boost. > > > > > > > > > > I'm going to implement a complete algorithm change for storing the > > page > > > > > identifier. But this change is quite significant and will require > > > > > re-testing. I suggest including > > > > > https://issues.apache.org/jira/browse/IGNITE-7638 in the next > > version, > > > > > > > > for > > > > > example, to 2.5. > > > > > > > > > > Sincerely, > > > > > Dmitriy Pavlov > > > > > > > > > > > > > > > > > > > > > > > Dmitriy, thanks for the update! Are there other tickets that are > > holding > > > > the release at this point? I remember that there was a performance > > > > degradation issue in FULL_SYNC mode, but I cannot find a ticket. > > > > > > > > D. > > > > > > > -- Best regards, Ilya
