Sorry for the delayed response, I am not very clear as to how o_direct works. If I am not mistaken, I think it has to do something with OS page caching, where virtuoso also caches data and OS also caches data in the form of page files and this double caching is avoided with the o_direct parameter. I maybe completely wrong here. If I am please correct me.
I want to test the performance benefits of using this parameter as we are expecting load sizes of billions of triples in our store. All I know is that o_direct param in the ini file enables this and this is OS dependent. But, is there any document out there which says which OSes support this parameter and are there any changes that needs to be done in Linux kernal(while compiling the Kernal or some config file) to enable this? Any document on this(Unix related or Virtuosos related) will help me in better understanding what is going on behind the scene. On Sun, Jan 23, 2011 at 7:41 AM, Hugh Williams <[email protected]>wrote: > Hi Abhi, > > Is this a Unix or Virtuoso question ie do you want to know what OS'es > support it or on what OS'es Virtuoso supports it ? > > Best Regards > Hugh Williams > Professional Services > OpenLink Software > Web: http://www.openlinksw.com > Support: http://support.openlinksw.com > Forums: http://boards.openlinksw.com/support > Twitter: http://twitter.com/OpenLink > > On 21 Jan 2011, at 03:11, Abhi wrote: > > > Is there a list of OSes that support the O_DIRECT param or does anybody > know how do i find whether a particular OS supports it? > > > > -- > > Cheers, > > Abhi > > > ------------------------------------------------------------------------------ > > Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! > > Finally, a world-class log management solution at an even better > price-free! > > Download using promo code Free_Logger_4_Dev2Dev. Offer expires > > February 28th, so secure your free ArcSight Logger TODAY! > > > http://p.sf.net/sfu/arcsight-sfd2d_______________________________________________ > > Virtuoso-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/virtuoso-users > > -- Cheers, Abhi
