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 >>> > > >>> > >>> >> >
