Re: What the difference between qio and direct I/O option in VxFS
Direct I/O is enabled simply be specifying in the mount options in /etc/vfstab (on Solaris). You can do it even with standard ufs volumes. As long as you have vxfs then you can also have vxfs with direct IO Quick I/O is the separately licensed bit I think - it should also outperform Direct I/O. Still - I'm a fan of raw over either... Cheers Connor --- KC [EMAIL PROTECTED] wrote: Connor, Thanks for the info. Is Direct I/O licensed with the Veritas Volume manager or the Database edition?? We want to be able to avoid double buffering, sound like Direct I/O is what we want, however our SysAdmin insisted that we need to purchase the Database edition, I thought Direct I/O came with the VxFS file system, maybe the SysAdmin confused Direct I/O to raw ,please clarify?? KC -Original Message- To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Date: Wednesday, June 20, 2001 2:53 AM Direct IO is the capacity to perform operations without the data being passed through the Unix buffer cache (it goes straight to/from the disks to the Oracle buffer cache) Quick IO is Veritas's simulation of raw datafiles - it presents the file to Oracle as if it were raw. hth connor --- KC [EMAIL PROTECTED] wrote: Dear List, What the difference between qio and direct I/O option in Veritas file system VxFS?? KC = Connor McDonald http://www.oracledba.co.uk (mirrored at http://www.oradba.freeserve.co.uk) Some days you're the pigeon, some days you're the statue Do You Yahoo!? Get your free @yahoo.co.uk address at http://mail.yahoo.co.uk or your free @yahoo.ie address at http://mail.yahoo.ie -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: =?iso-8859-1?q?Connor=20McDonald?= INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: KC INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). = Connor McDonald http://www.oracledba.co.uk (mirrored at http://www.oradba.freeserve.co.uk) Some days you're the pigeon, some days you're the statue Do You Yahoo!? Get your free @yahoo.co.uk address at http://mail.yahoo.co.uk or your free @yahoo.ie address at http://mail.yahoo.ie -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: =?iso-8859-1?q?Connor=20McDonald?= INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Re: What the difference between qio and direct I/O option in VxFS
Connor, You have confirmed what I believed to be true, you don't need the Veritas database edition for direct I/O. Just need to convince our SysAdmin now. KC -Original Message- To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Date: Wednesday, June 20, 2001 5:44 PM Direct I/O is enabled simply be specifying in the mount options in /etc/vfstab (on Solaris). You can do it even with standard ufs volumes. As long as you have vxfs then you can also have vxfs with direct IO Quick I/O is the separately licensed bit I think - it should also outperform Direct I/O. Still - I'm a fan of raw over either... Cheers Connor --- KC [EMAIL PROTECTED] wrote: Connor, Thanks for the info. Is Direct I/O licensed with the Veritas Volume manager or the Database edition?? We want to be able to avoid double buffering, sound like Direct I/O is what we want, however our SysAdmin insisted that we need to purchase the Database edition, I thought Direct I/O came with the VxFS file system, maybe the SysAdmin confused Direct I/O to raw ,please clarify?? KC -Original Message- To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Date: Wednesday, June 20, 2001 2:53 AM Direct IO is the capacity to perform operations without the data being passed through the Unix buffer cache (it goes straight to/from the disks to the Oracle buffer cache) Quick IO is Veritas's simulation of raw datafiles - it presents the file to Oracle as if it were raw. hth connor --- KC [EMAIL PROTECTED] wrote: Dear List, What the difference between qio and direct I/O option in Veritas file system VxFS?? KC = Connor McDonald http://www.oracledba.co.uk (mirrored at http://www.oradba.freeserve.co.uk) Some days you're the pigeon, some days you're the statue Do You Yahoo!? Get your free @yahoo.co.uk address at http://mail.yahoo.co.uk or your free @yahoo.ie address at http://mail.yahoo.ie -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: =?iso-8859-1?q?Connor=20McDonald?= INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: KC INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). = Connor McDonald http://www.oracledba.co.uk (mirrored at http://www.oradba.freeserve.co.uk) Some days you're the pigeon, some days you're the statue Do You Yahoo!? Get your free @yahoo.co.uk address at http://mail.yahoo.co.uk or your free @yahoo.ie address at http://mail.yahoo.ie -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: =?iso-8859-1?q?Connor=20McDonald?= INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: KC INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send
RE: What the difference between qio and direct I/O option in VxFS
How do you specify direct I/O option in /etc/vfstab? Alex Hillman -Original Message- Sent: Wednesday, June 20, 2001 4:25 AM To: Multiple recipients of list ORACLE-L VxFS Direct I/O is enabled simply be specifying in the mount options in /etc/vfstab (on Solaris). You can do it even with standard ufs volumes. As long as you have vxfs then you can also have vxfs with direct IO Quick I/O is the separately licensed bit I think - it should also outperform Direct I/O. Still - I'm a fan of raw over either... Cheers Connor --- KC [EMAIL PROTECTED] wrote: Connor, Thanks for the info. Is Direct I/O licensed with the Veritas Volume manager or the Database edition?? We want to be able to avoid double buffering, sound like Direct I/O is what we want, however our SysAdmin insisted that we need to purchase the Database edition, I thought Direct I/O came with the VxFS file system, maybe the SysAdmin confused Direct I/O to raw ,please clarify?? KC -Original Message- To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Date: Wednesday, June 20, 2001 2:53 AM Direct IO is the capacity to perform operations without the data being passed through the Unix buffer cache (it goes straight to/from the disks to the Oracle buffer cache) Quick IO is Veritas's simulation of raw datafiles - it presents the file to Oracle as if it were raw. hth connor --- KC [EMAIL PROTECTED] wrote: Dear List, What the difference between qio and direct I/O option in Veritas file system VxFS?? KC = Connor McDonald http://www.oracledba.co.uk (mirrored at http://www.oradba.freeserve.co.uk) Some days you're the pigeon, some days you're the statue Do You Yahoo!? Get your free @yahoo.co.uk address at http://mail.yahoo.co.uk or your free @yahoo.ie address at http://mail.yahoo.ie -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: =?iso-8859-1?q?Connor=20McDonald?= INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: KC INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). = Connor McDonald http://www.oracledba.co.uk (mirrored at http://www.oradba.freeserve.co.uk) Some days you're the pigeon, some days you're the statue Do You Yahoo!? Get your free @yahoo.co.uk address at http://mail.yahoo.co.uk or your free @yahoo.ie address at http://mail.yahoo.ie -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: =?iso-8859-1?q?Connor=20McDonald?= INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Hillman, Alex INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: What the difference between qio and direct I/O option in VxFS
Direct I/O is part of the Database Edition. Walking on water and developing software from a specification are easy if both are frozen. Christopher R. Spence Oracle DBA Fuelspot -Original Message- Sent: Tuesday, June 19, 2001 8:15 PM To: Multiple recipients of list ORACLE-L VxFS Connor, Thanks for the info. Is Direct I/O licensed with the Veritas Volume manager or the Database edition?? We want to be able to avoid double buffering, sound like Direct I/O is what we want, however our SysAdmin insisted that we need to purchase the Database edition, I thought Direct I/O came with the VxFS file system, maybe the SysAdmin confused Direct I/O to raw ,please clarify?? KC -Original Message- To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Date: Wednesday, June 20, 2001 2:53 AM Direct IO is the capacity to perform operations without the data being passed through the Unix buffer cache (it goes straight to/from the disks to the Oracle buffer cache) Quick IO is Veritas's simulation of raw datafiles - it presents the file to Oracle as if it were raw. hth connor --- KC [EMAIL PROTECTED] wrote: Dear List, What the difference between qio and direct I/O option in Veritas file system VxFS?? KC = Connor McDonald http://www.oracledba.co.uk (mirrored at http://www.oradba.freeserve.co.uk) Some days you're the pigeon, some days you're the statue Do You Yahoo!? Get your free @yahoo.co.uk address at http://mail.yahoo.co.uk or your free @yahoo.ie address at http://mail.yahoo.ie -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: =?iso-8859-1?q?Connor=20McDonald?= INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: KC INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Christopher Spence INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Re: What the difference between qio and direct I/O option in VxFS
Quick I/O is part of the database edition. Direct I/O is a generic mount option for vxfs artition (standard part of vxfs). Mounting something convosyn=direct avoids s buffer cache for everything, whereas quick i/o actually provides an interface for accessing the file as a raw character device. George - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, June 20, 2001 8:51 AM Direct I/O is part of the Database Edition. Walking on water and developing software from a specification are easy if both are frozen. Christopher R. Spence Oracle DBA Fuelspot -Original Message- Sent: Tuesday, June 19, 2001 8:15 PM To: Multiple recipients of list ORACLE-L VxFS Connor, Thanks for the info. Is Direct I/O licensed with the Veritas Volume manager or the Database edition?? We want to be able to avoid double buffering, sound like Direct I/O is what we want, however our SysAdmin insisted that we need to purchase the Database edition, I thought Direct I/O came with the VxFS file system, maybe the SysAdmin confused Direct I/O to raw ,please clarify?? KC -Original Message- To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Date: Wednesday, June 20, 2001 2:53 AM Direct IO is the capacity to perform operations without the data being passed through the Unix buffer cache (it goes straight to/from the disks to the Oracle buffer cache) Quick IO is Veritas's simulation of raw datafiles - it presents the file to Oracle as if it were raw. hth connor --- KC [EMAIL PROTECTED] wrote: Dear List, What the difference between qio and direct I/O option in Veritas file system VxFS?? KC = Connor McDonald http://www.oracledba.co.uk (mirrored at http://www.oradba.freeserve.co.uk) Some days you're the pigeon, some days you're the statue Do You Yahoo!? Get your free @yahoo.co.uk address at http://mail.yahoo.co.uk or your free @yahoo.ie address at http://mail.yahoo.ie -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: =?iso-8859-1?q?Connor=20McDonald?= INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: KC INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Christopher Spence INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: George Schlossnagle INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: What the difference between qio and direct I/O option in VxFS
--- Hillman, Alex [EMAIL PROTECTED] wrote: How do you specify direct I/O option in /etc/vfstab? Use the forcedirectio mount option in the vfstab. = Have a nice day !! Best Regards, K Gopalakrishnan, Bangalore, INDIA. __ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail http://personal.mail.yahoo.com/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: K Gopalakrishnan INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: What the difference between qio and direct I/O option in VxFS
ufs: forcedirectio vxfs: convosync=direct,mincache=direct hth connor --- Hillman, Alex [EMAIL PROTECTED] wrote: How do you specify direct I/O option in /etc/vfstab? Alex Hillman -Original Message- Sent: Wednesday, June 20, 2001 4:25 AM To: Multiple recipients of list ORACLE-L VxFS Direct I/O is enabled simply be specifying in the mount options in /etc/vfstab (on Solaris). You can do it even with standard ufs volumes. As long as you have vxfs then you can also have vxfs with direct IO Quick I/O is the separately licensed bit I think - it should also outperform Direct I/O. Still - I'm a fan of raw over either... Cheers Connor --- KC [EMAIL PROTECTED] wrote: Connor, Thanks for the info. Is Direct I/O licensed with the Veritas Volume manager or the Database edition?? We want to be able to avoid double buffering, sound like Direct I/O is what we want, however our SysAdmin insisted that we need to purchase the Database edition, I thought Direct I/O came with the VxFS file system, maybe the SysAdmin confused Direct I/O to raw ,please clarify?? KC -Original Message- To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Date: Wednesday, June 20, 2001 2:53 AM Direct IO is the capacity to perform operations without the data being passed through the Unix buffer cache (it goes straight to/from the disks to the Oracle buffer cache) Quick IO is Veritas's simulation of raw datafiles - it presents the file to Oracle as if it were raw. hth connor --- KC [EMAIL PROTECTED] wrote: Dear List, What the difference between qio and direct I/O option in Veritas file system VxFS?? KC = Connor McDonald http://www.oracledba.co.uk (mirrored at http://www.oradba.freeserve.co.uk) Some days you're the pigeon, some days you're the statue Do You Yahoo!? Get your free @yahoo.co.uk address at http://mail.yahoo.co.uk or your free @yahoo.ie address at http://mail.yahoo.ie -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: =?iso-8859-1?q?Connor=20McDonald?= INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: KC INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). = Connor McDonald http://www.oracledba.co.uk (mirrored at http://www.oradba.freeserve.co.uk) Some days you're the pigeon, some days you're the statue Do You Yahoo!? Get your free @yahoo.co.uk address at http://mail.yahoo.co.uk or your free @yahoo.ie address at http://mail.yahoo.ie -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: =?iso-8859-1?q?Connor=20McDonald?= INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Hillman, Alex INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list,
What the difference between qio and direct I/O option in VxFS
Dear List, What the difference between qio and direct I/O option in Veritas file system VxFS?? KC
Re: What the difference between qio and direct I/O option in VxFS
Connor, Thanks for the info. Is Direct I/O licensed with the Veritas Volume manager or the Database edition?? We want to be able to avoid double buffering, sound like Direct I/O is what we want, however our SysAdmin insisted that we need to purchase the Database edition, I thought Direct I/O came with the VxFS file system, maybe the SysAdmin confused Direct I/O to raw ,please clarify?? KC -Original Message- To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Date: Wednesday, June 20, 2001 2:53 AM Direct IO is the capacity to perform operations without the data being passed through the Unix buffer cache (it goes straight to/from the disks to the Oracle buffer cache) Quick IO is Veritas's simulation of raw datafiles - it presents the file to Oracle as if it were raw. hth connor --- KC [EMAIL PROTECTED] wrote: Dear List, What the difference between qio and direct I/O option in Veritas file system VxFS?? KC = Connor McDonald http://www.oracledba.co.uk (mirrored at http://www.oradba.freeserve.co.uk) Some days you're the pigeon, some days you're the statue Do You Yahoo!? Get your free @yahoo.co.uk address at http://mail.yahoo.co.uk or your free @yahoo.ie address at http://mail.yahoo.ie -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: =?iso-8859-1?q?Connor=20McDonald?= INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: KC INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
