Dmitriy, Prachi, Thanks to both of you for the development and documentation of the feature. I've added a reference from readme to Direct I/O section on wiki so that people can learn even more about the capability.
-- Denis On Fri, Mar 23, 2018 at 2:34 PM, Dmitry Pavlov <dpavlov....@gmail.com> wrote: > Hi Prachi, > > Yes, it's a great description. > > I'm impressed by how informative and short you managed to make it. > > Thank you! > > Sincerely, > Dmitriy Pavlov > > сб, 24 мар. 2018 г. в 0:29, Prachi Garg <pg...@gridgain.com>: > >> Dmitriy, >> >> I have documented the Direct I/O plugin. Please review [1] and provide >> comments/feedback in the ticket [2]. >> >> [1] >> https://apacheignite.readme.io/v2.4/docs/durable-memory- >> tuning#section-enabling-direct-i-o >> >> [2] https://issues.apache.org/jira/browse/IGNITE-7466 >> >> >> -Prachi >> >> On Wed, Mar 21, 2018 at 11:22 PM, Dmitry Pavlov <dpavlov....@gmail.com> >> wrote: >> >> > Yes, will do. >> > >> > чт, 22 мар. 2018 г. в 1:05, Denis Magda <dma...@apache.org>: >> > >> > > Dmitriy, >> > > >> > > Thanks for updating the WAL section. Now it makes total sense to me. >> > > >> > > As for the page with JNA projects, let's get added there! Could you >> > > contact the owners? >> > > >> > > -- >> > > Denis >> > > >> > > >> > > On Wed, Mar 21, 2018 at 9:27 AM, Dmitry Pavlov <dpavlov....@gmail.com >> > >> > > wrote: >> > > >> > >> Denis, >> > >> >> > >> one more thing, can/should we mention Ignite Direct IO plugin in >> list of >> > >> project using JNA here: https://github.com/java-native-access/jna >> > >> >> > >> Sincerely, >> > >> Dmitriy Pavlov >> > >> >> > >> ср, 21 мар. 2018 г. в 1:59, Denis Magda <dma...@apache.org>: >> > >> >> > >>> *Dmitriy*, thanks. Astonishing job! We'll add a section to the >> durable >> > >>> memory tuning page and refer to the wiki for more details: >> > >>> https://issues.apache.org/jira/browse/IGNITE-7466 >> > >>> >> > >>> Please clarify the following: >> > >>> >> > >>> > Direct I/O mode can't be enabled for Write Ahead Log files. >> However, >> > >>> when >> > >>> > working with plugin, WAL manager applies advising Linux systems do >> > not >> > >>> > store the data of the file in page cache as they are not required. >> > >>> >> > >>> >> > >>> For me, it means that WAL always goes through the operating system >> I/O >> > >>> calls. Nothing changes for the WAL. However, I'm not sure what you >> > meant >> > >>> to >> > >>> explain by saying "when working with the plugin (Direct I/O) WAL >> > manager >> > >>> applies...". Could you rephrase it to bring more clarity? >> > >>> >> > >>> *Raymond,* >> > >>> >> > >>> >> > >>> If Direct I/O is enabled by default it will bring down the >> performance >> > of >> > >>> read-intensive application because, as Dmitry says, the reads bypass >> > page >> > >>> cache. So, I would recommend using it for write-intensive workloads >> > and, >> > >>> probably, for mixed-workloads depending on the reads and writes >> rate. >> > >>> >> > >>> -- >> > >>> Denis >> > >>> >> > >>> >> > >>> On Tue, Mar 20, 2018 at 2:29 PM, Raymond Wilson < >> > >>> raymond_wil...@trimble.com> >> > >>> wrote: >> > >>> >> > >>> > Looks good! >> > >>> > >> > >>> > Is there any reason why this should not be a default setting if it >> > >>> > gracefully downgrades to non-Direct IO if not supported by the OS? >> > >>> > >> > >>> > Thanks, >> > >>> > Raymond. >> > >>> > >> > >>> > -----Original Message----- >> > >>> > From: Dmitriy Setrakyan [mailto:dsetrak...@apache.org] >> > >>> > Sent: Wednesday, March 21, 2018 10:23 AM >> > >>> > To: dev <dev@ignite.apache.org> >> > >>> > Subject: Re: Ignite Direct I/O plugin description added to wiki >> > >>> > >> > >>> > Thanks Dmitry, awesome work! >> > >>> > >> > >>> > On Wed, Mar 21, 2018 at 12:21 AM, Dmitry Pavlov < >> > dpavlov....@gmail.com >> > >>> > >> > >>> > wrote: >> > >>> > >> > >>> > > Hi Igniters, >> > >>> > > >> > >>> > > I've added description of new plugin for Direct I/O for native >> > >>> > > persistence ( >> > >>> > > https://issues.apache.org/jira/browse/IGNITE-6341) to wiki >> > >>> > > https://cwiki.apache.org/confluence/display/IGNITE/ >> > >>> > > Ignite+Persistent+Store+-+under+the+hood#IgnitePersistentStore- >> > >>> > > underthehood-DirectI/O >> > >>> > > >> > >>> > > >> > >>> > > SIncerely, >> > >>> > > Dmitriy Pavlov >> > >>> > > >> > >>> > >> > >>> >> > >> >> > > >> > >> >
