Simpler Navigation for Servers and Operating Systems - Please Update Your Bookmarks
Completed: a much simpler Servers and Operating Systems section of the Community. We combined many of the older boards, so you won't have to click through so many levels to get at the information you need. Check the consolidated boards here as many sub-forums are now single boards.
If you have bookmarked forums or discussion boards in Servers and Operating Systems, we suggest you check and update them as needed.
cancel
Showing results for 
Search instead for 
Did you mean: 

Async I/O

Archana Prasad
Occasional Advisor

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.
3 REPLIES
James R. Ferguson
Acclaimed Contributor

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...
Stefan Farrelly
Honored Contributor

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...
Bill McNAMARA_1
Honored Contributor

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
It works for me (tm)