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тАО06-01-2001 05:52 AM
тАО06-01-2001 05:52 AM
Async I/O
Hi,
Does Hp-UX 11.0 support async I/O on hfs filesystems?
If so, is it more performance efficient to use async I/O while running an Oracle database.
Thank You very much.
Archana.
Does Hp-UX 11.0 support async I/O on hfs filesystems?
If so, is it more performance efficient to use async I/O while running an Oracle database.
Thank You very much.
Archana.
3 REPLIES 3
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тАО06-01-2001 06:04 AM
тАО06-01-2001 06:04 AM
Re: Async I/O
Hi:
Yes, but... Take a look at the caveats here:
http://docs.hp.com/hpux/onlinedocs/os/KCparam.FSasync.html
If you have vxfs (JFS) filesystems (you should, in my opinion), then look too at the documents "Mount options explained" (ID #KBAN00000258) and "VXFS intent log explained"
(ID #KBAN00000151). These offfer good explanations of various JFS mount options, along with some suggestions for trading performance and integrity.
Together, these documents should help you make an informed choice.
...JRF...
Yes, but... Take a look at the caveats here:
http://docs.hp.com/hpux/onlinedocs/os/KCparam.FSasync.html
If you have vxfs (JFS) filesystems (you should, in my opinion), then look too at the documents "Mount options explained" (ID #KBAN00000258) and "VXFS intent log explained"
(ID #KBAN00000151). These offfer good explanations of various JFS mount options, along with some suggestions for trading performance and integrity.
Together, these documents should help you make an informed choice.
...JRF...
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тАО06-01-2001 06:08 AM
тАО06-01-2001 06:08 AM
Re: Async I/O
Yes, async I/O is supported on HP-UX. It is apparantly faster to use, including for databases, but at a much greater risk of losing data if you have a crash.
Im from Palmerston North, New Zealand, but somehow ended up in London...
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тАО06-01-2001 06:15 AM
тАО06-01-2001 06:15 AM
Re: Async I/O
I don't think a lot of those data sync mount options are available unless you have online JFS .. can anyone verify?
Later,
bill
Later,
bill
It works for me (tm)
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