IDS 7.3 on Linux with raw devices
Question: can raw devices be used for dbspaces with IDS 7.3 on Linux, and how would one create them? Answers: raw devices are not supported in the IDS 7.30 (UC5) Linux Edition (per the release notes), and the stock Linux kernel of the day had no raw device support — only an experimental patch (Stephen Tweedie's raw I/O patch against kernel 2.2.9, available from ftp.uk.linux.org) plus some Kernel Traffic discussion links. No one reported actually testing it with Informix, so no working recipe or resolution is recorded; cooked files remained the practical option.
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Is there any possibility to use raw devices for dbspaces under Linux? If there is one, how can I create such a device? thanks for information, Markus
> Is there any possibility to use raw devices for dbspaces under Linux? If > there is one, how can I create such a device? Raw devices are not supported in IDS 7.30 (UC5) Linux Edition release. See /opt/informix/release/en_us/0333/IDS_7.3 Leos
Letscho wrote: > Is there any possibility to use raw devices for dbspaces under Linux? No; Linux doesn't support them. > If there is one, how can I create such a device? You'd have to install an experimental (non-stable) kernel with the appropriate extension, if indeed it is available at all. -- Jonathan Leffler (jleffler@informix.com, jleffler@earthlink.net) Guardian of DBD::Informix v0.60 -- see http://www.perl.com/CPAN #include <disclaimer.h>
In article <3780288A.39B1@earthlink.net>, Jonathan Leffler <jleffler@earthlink.net> wrote: >Letscho wrote: >> Is there any possibility to use raw devices for dbspaces under Linux? > >No; Linux doesn't support them. > >> If there is one, how can I create such a device? > >You'd have to install an experimental (non-stable) kernel with the >appropriate extension, if indeed it is available at all. You can get the latest version of Stephen Tweedie's raw I/O patch from ftp://ftp.uk.linux.org/pub/linux/sct/fs/raw-io/raw-19990527.tar.gz The patch is against kernel 2.2.9. If nobody else has a chance to try it out with Informix, I'll try to find time to give it a go. Has anyone a decent benchmark test suite so that I can compare performance? --Malcolm -- Malcolm Beattie <mbeattie@sable.ox.ac.uk> Oxford University Computing Services "I permitted that as a demonstration of futility" --Grey Roger
Just a follow-up to your note, with an URL to an interesting website: http://www.kt.opensrc.org/latest.html#2 This points to some "documentation" of sorts regarding the subject, just as an FYI. The thread is interesting, and it looks like raw disks are here... ( I think... :-) Tim Malcolm Beattie wrote: > > In article <3780288A.39B1@earthlink.net>, > Jonathan Leffler <jleffler@earthlink.net> wrote: > >Letscho wrote: > >> Is there any possibility to use raw devices for dbspaces under Linux? > > > >No; Linux doesn't support them. > > > >> If there is one, how can I create such a device? > > > >You'd have to install an experimental (non-stable) kernel with the > >appropriate extension, if indeed it is available at all. > > You can get the latest version of Stephen Tweedie's raw I/O patch from > ftp://ftp.uk.linux.org/pub/linux/sct/fs/raw-io/raw-19990527.tar.gz > > The patch is against kernel 2.2.9. If nobody else has a chance to try > it out with Informix, I'll try to find time to give it a go. Has > anyone a decent benchmark test suite so that I can compare > performance? > > --Malcolm > > -- > Malcolm Beattie <mbeattie@sable.ox.ac.uk> > Oxford University Computing Services > "I permitted that as a demonstration of futility" --Grey Roger -- - -- --- Tim Schaefer ---- tschaefe@mindspring.com --- http://www.inxutil.com -- -
In article <3784E033.5123C2E6@mindspring.com>, Tim Schaefer <tschaefe@mindspring.com> wrote: >Just a follow-up to your note, with an URL to an interesting website: > >http://www.kt.opensrc.org/latest.html#2 > >This points to some "documentation" of sorts regarding the subject, >just as an FYI. The thread is interesting, and it looks like raw >disks are here... ( I think... :-) Um, beware of changeable links. The issue has rolled over. The permanent URL of interest is: http://www.kt.opensrc.org/kt19990708_26.html#2