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 <ORACLE-L_at_fatcity.com> 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 <kchan_at_speednet.com.au> 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
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>
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-- 
Author: KC
  INET: kchan_at_speednet.com.au

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