On 11/17/11 15:23, Adriano dos Santos Fernandes wrote: > On 17/11/2011 09:19, Alex Peshkoff wrote: >> On 11/17/11 14:14, Adriano dos Santos Fernandes wrote: >>> On 17/11/2011 07:52, Dmitry Yemanov wrote: >>>> The only way to guarantee ordered writes is to flush individual pages >>>> and this is what FW=ON does. >>> Or to flush group of independent pages at once, like I proposed. I think >>> this can be a great improvement for FW=ON. >> The suggestion appears very interesting, even with average size of group >> == 2 engine shoudl run almost twice faster. >> >> > BTW, Vlad asked about fdatasync (instead of O_DSYNC) performance in > multi-thread environment. I didn't noted any problem. >
fdatasync() is direct mapped to function system call. System calls are definitely thread safe. I.e. no problems on my mind. ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
