Re: is it ok to use KAIO on HP-UX
A user asked whether to enable KAIO (kernel asynchronous I/O) with Informix 7.31.FD2 on HP-UX 11.0, and wanted performance/sizing data. Respondents said "just do it": one reported roughly 30% better batch throughput on HP-UX 10.20/IDS 7.31 (and later 11i/IDS 9.30), plus the benefit of not having to tune/manage AIO VPs. Another noted that KAIO's bad reputation came from specific older combinations (e.g. IDS 9.21 on HP-UX 10.20) suspected of causing assert failures. A link to the Informix FAQ (smooth1.demon.co.uk, section 6.20) covering the Informix/HP KAIO history was given as further reading.
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timothy.a.brown@marconi.com wrote: > I need info on the Pro's and Con's of running KAIO on HPUX 11.0 using > Informix 7.31.FD2. Are there any www links on Performance tests? Sizing > issues? JFDI. -- "C'est pas parce qu'on n'a rien ' dire qu'il faut fermer sa gueule" - Coluche
http://www.smooth1.demon.co.uk/ifaq06.htm#6.20 Look for the bit starting... Here is the real story behind Informix/HP KAIO over the years... "Malc P" <malc_p@btinternet.com> wrote in message news:8c28402a.0402070238.38a7a040@posting.google.com... > Obnoxio The Clown <obnoxio@hotmail.com> wrote in message news:<c00k2u$11qsee$1@ID-64669.news.uni-berlin.de>... > > timothy.a.brown@marconi.com wrote: > > > > > I need info on the Pro's and Con's of running KAIO on HPUX 11.0 using > > > Informix 7.31.FD2. Are there any www links on Performance tests? Sizing > > > issues? > > > > Plus, further to my earlier post, with KAIO you don't have the pain in > the a** of managing all the AIO VPs. > > Malc_p
Obnoxio The Clown <obnoxio@hotmail.com> wrote in message news:<c00k2u$11qsee$1@ID-64669.news.uni-berlin.de>... > timothy.a.brown@marconi.com wrote: > > > I need info on the Pro's and Con's of running KAIO on HPUX 11.0 using > > Informix 7.31.FD2. Are there any www links on Performance tests? Sizing > > issues? > > JFDI. Yup, what he said. We're now on HP-UX 11i with IDS9.30 but have had HP10.20 for nnn years on IDS7.31 and very early on found KAIO improved throughput on the batch work by a good 30% (this is largely OLTP with a smattering of warehousing due to retention of old never-used data). Malc_P PS "JFDI": I worked, many years ago, in a defence-industry electronics company where most projects were strictly controlled and even the smallest change had to go through the usual (typically British) anally-retentive gamut of meetings, justifications, procedures and the rest of it. I managed (eventually) to bring attention to the bleeding obvious fact that somethings can be done bypassing this route, and the means to do this was eventually rubber-stamped into the procedures with the name "Jobs For Direct Implementation". Manglement neve twigged. So a small arm of General Dynamics in the UK now has "JFDI" projects enshrined in their BS9000-approved documentation.
Obnoxio The Clown <obnoxio@hotmail.com> wrote in message news:<c00k2u$11qsee$1@ID-64669.news.uni-berlin.de>... > timothy.a.brown@marconi.com wrote: > > > I need info on the Pro's and Con's of running KAIO on HPUX 11.0 using > > Informix 7.31.FD2. Are there any www links on Performance tests? Sizing > > issues? > Plus, further to my earlier post, with KAIO you don't have the pain in the a** of managing all the AIO VPs. Malc_p
Malc P wrote: > PS "JFDI": I worked, many years ago, in a defence-industry electronics > company where most projects were strictly controlled and even the > smallest change had to go through the usual (typically British) > anally-retentive gamut of meetings, justifications, procedures and the > rest of it. I managed (eventually) to bring attention to the bleeding > obvious fact that somethings can be done bypassing this route, and the > means to do this was eventually rubber-stamped into the procedures > with the name "Jobs For Direct Implementation". Manglement neve > twigged. So a small arm of General Dynamics in the UK now has "JFDI" > projects enshrined in their BS9000-approved documentation. If I could dish out awards for this sort of thinking, I would. I'm proud to know you! -- "C'est pas parce qu'on n'a rien ''' dire qu'il faut fermer sa gueule" - Coluche
"Malc P" <malc_p@btinternet.com> wrote in message news:8c28402a.0402070231.6006d74b@posting.google.com... > Obnoxio The Clown <obnoxio@hotmail.com> wrote in message news:<c00k2u$11qsee$1@ID-64669.news.uni-berlin.de>... > > timothy.a.brown@marconi.com wrote: > > > > > I need info on the Pro's and Con's of running KAIO on HPUX 11.0 using > > > Informix 7.31.FD2. Are there any www links on Performance tests? Sizing > > > issues? > > > > JFDI. > Yup, what he said. > We're now on HP-UX 11i with IDS9.30 but have had HP10.20 for nnn years > on IDS7.31 > and very early on found KAIO improved throughput on the batch work by > a good 30% > (this is largely OLTP with a smattering of warehousing due to > retention of old never-used data). I agree. I think the apprehension about kaio and HP-UX stems from some combinations - IDS 9.21 and HP-UX 10.20 is one that comes to mind - where kaio was suspected to cause some assert failures. UK Tech Support Wizard Marco Greco is an expert on this: perhapos he'll comment ....