DIRECT_IO onconfig parameter

Hello, IDS 11.10 FC2W4 on Solaris 10 Pls refer me a document or help me in finding out if my file system supports direct I/O for the 2K and 8K page size dbspace chunk in my system so that i can set the onconfig parameter DIRECT_IO to 1 and use the direct I/O feature for better performance with cooked devices. Thanking you in advance Vikas

Solaris 10 supports Direct IO. Art On Tue, Aug 12, 2008 at 9:09 AM, VIKAS HIVARKAR <vikas.hivarkar@gmail.com>wrote: > Hello, > > IDS 11.10 FC2W4 on Solaris 10 > > Pls refer me a document or help me in finding out if my file system > supports > direct I/O for the 2K and 8K page size dbspace chunk in my system so that i > can set the onconfig parameter DIRECT_IO to 1 and use the direct I/O > feature > for better performance with cooked devices. > > Thanking you in advance > Vikas > > > > ******************************************************************************* > Forum Note: Use "Reply" to post a response in the discussion forum. > > -- Art S. Kagel Oninit (www.oninit.com) IIUG Board of Directors (art@iiug.org) Disclaimer: Please keep in mind that my own opinions are my own opinions and do not reflect on my employer, Oninit, the IIUG, nor any other organization with which I am associated either explicitly or implicitly. Neither do those opinions reflect those of other individuals affiliated with any entity with which I am affiliated nor those of the entities themselves.

Thank you ! Is there any command which would show me if the directio feature is enabled/used/running on my server or i need to ask our system admin to enable it, i refered some man pages and web pages also checked for the /etc/vfstab entries but not sure how to confirm if its really running on my file system. Regards Vikas >Solaris 10 supports Direct IO. >Art >On Tue, Aug 12, 2008 at 9:09 AM, VIKAS HIVARKAR wrote: >> Hello, >> >> IDS 11.10 FC2W4 on Solaris 10 >> >> Pls refer me a document or help me in finding out if my file system >> supports >> direct I/O for the 2K and 8K page size dbspace chunk in my system so that i >> can set the onconfig parameter DIRECT_IO to 1 and use the direct I/O >> feature >> for better performance with cooked devices. >> >> Thanking you in advance >> Vikas

I'm not an SA, and certainly not a Solaris expert, but FAIK all that is required is for the application (in this case oninit) to open the files with the O_DIRECT flag, which IDS will do if the file is COOKED, KAIOOFF is not set (and KAIOON is set on HPUX), and DIRECT_IO is set to 1 in the ONCONFIG file. The Performance Guide has a discussion of when IDS can and when it cannot use DIRECT IO. Art On Tue, Aug 12, 2008 at 10:22 AM, VIKAS HIVARKAR <vikas.hivarkar@gmail.com>wrote: > Thank you ! > > Is there any command which would show me if the directio feature is > enabled/used/running on my server or i need to ask our system admin to > enable > it, i refered some man pages and web pages also checked for the /etc/vfstab > entries but not sure how to confirm if its really running on my file > system. > > Regards > Vikas > >Solaris 10 supports Direct IO. > > >Art > > >On Tue, Aug 12, 2008 at 9:09 AM, VIKAS HIVARKAR wrote: > > >> Hello, > >> > >> IDS 11.10 FC2W4 on Solaris 10 > >> > >> Pls refer me a document or help me in finding out if my file system > >> supports > >> direct I/O for the 2K and 8K page size dbspace chunk in my system so > that i > >> can set the onconfig parameter DIRECT_IO to 1 and use the direct I/O > >> feature > >> for better performance with cooked devices. > >> > >> Thanking you in advance > >> Vikas > > > > ******************************************************************************* > Forum Note: Use "Reply" to post a response in the discussion forum. > > -- Art S. Kagel Oninit (www.oninit.com) IIUG Board of Directors (art@iiug.org) Disclaimer: Please keep in mind that my own opinions are my own opinions and do not reflect on my employer, Oninit, the IIUG, nor any other organization with which I am associated either explicitly or implicitly. Neither do those opinions reflect those of other individuals affiliated with any entity with which I am affiliated nor those of the entities themselves.