Informix device permissions after SuSE reboot
On SuSE Server 8 with OnLine 5.20, logical volume device files kept reverting to root:disk ownership after every reboot, so the engine couldn't start. Suggested fixes: add a chown/chmod command to /etc/init.d/boot.local to reset ownership to informix at boot, and switch from block devices to raw (character) devices, which reportedly avoids the permission reset and also gives better I/O performance (raw said to be ~10-25% faster than cooked, and both faster than filesystem chunks). No confirmation from the poster that it worked.
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OnLine v5.20 on SuSE Server 8. Actually this is really a SuSE question, but their group is pretty unhelpful. Someone must have experienced this ...? I have logical volumes in my one volume group whose permissions need to have a specific setting, thus: brw-rw---- 1 informix informix 58, 3 Jun 21 2004 rootdbs_1 But on each re-boot these permissions are being reset, so: brw-rw---- 1 root disk 58, 3 Jun 21 2004 rootdbs_1 and thus the application cannot start. Obviously I can include a start-up script to change the permissions, but am I missing something obvious in why they are being reset each time? thanks Neil Truby t:01932 724027 Director m:07798 811708 Ardenta Limited e:neil.truby@ardenta.com
On Suse 2.4.19, we also had to add a "chown" command to: /etc/init.d/boot.local Also, you should use raw (character) rather than block devices. -- Regards, Doug Lawry www.douglawry.webhop.org "Neil Truby" <neil.truby@ardenta.com> wrote: > OnLine v5.20 on SuSE Server 8. > Actually this is really a SuSE question, but their group is pretty > unhelpful. Someone must have experienced this ...? > > I have logical volumes in my one volume group whose permissions need to have > a specific setting, thus: > > brw-rw---- 1 informix informix 58, 3 Jun 21 2004 rootdbs_1 > > But on each re-boot these permissions are being reset, so: > > brw-rw---- 1 root disk 58, 3 Jun 21 2004 rootdbs_1 > > and thus the application cannot start. > > Obviously I can include a start-up script to change the permissions, but am > I missing something obvious in why they are being reset each time? > > thanks > Neil Truby t:01932 724027 > Director m:07798 811708 > Ardenta Limited e:neil.truby@ardenta.com
"Doug Lawry" <lawry@nildram.co.uk> wrote in message news:cbh1po$lis$1@nntp0.reith.bbc.co.uk... > On Suse 2.4.19, we also had to add a "chown" command to: > > /etc/init.d/boot.local OK. > > Also, you should use raw (character) rather than block devices. Does it make any difference with OnLine?
"Neil Truby" <neil.truby@ardenta.com> wrote: > "Doug Lawry" <lawry@nildram.co.uk> wrote: > > > On Suse 2.4.19, we also had to add a "chown" command to: > > > > /etc/init.d/boot.local > > OK. > > > > > Also, you should use raw (character) rather than block devices. > > Does it make any difference with OnLine? Absolutely. Others can probably explain why better than me.
"Doug Lawry" <lawry@nildram.co.uk> wrote in message news:cbh9rv$obe$1@nntp0.reith.bbc.co.uk... > "Neil Truby" <neil.truby@ardenta.com> wrote: > > > "Doug Lawry" <lawry@nildram.co.uk> wrote: > > > > > On Suse 2.4.19, we also had to add a "chown" command to: > > > > > > /etc/init.d/boot.local > > > > OK. > > > > > > > > Also, you should use raw (character) rather than block devices. > > > > Does it make any difference with OnLine? > > Absolutely. Others can probably explain why better than me. Probably. But why don't you have a go first, and then everyone else can take the piss .....:-)
Neil Truby wrote: > "Doug Lawry" <lawry@nildram.co.uk> wrote in message > news:cbh9rv$obe$1@nntp0.reith.bbc.co.uk... > >>"Neil Truby" <neil.truby@ardenta.com> wrote: >> >> >>>"Doug Lawry" <lawry@nildram.co.uk> wrote: >>> >>> >>>>On Suse 2.4.19, we also had to add a "chown" command to: >>>> >>>> /etc/init.d/boot.local >>> >>>OK. >>> >>> >>>>Also, you should use raw (character) rather than block devices. >>> >>>Does it make any difference with OnLine? >> >>Absolutely. Others can probably explain why better than me. > Makes huge difference. Permissions don't get screwed-up on re-boot. Michael > > Probably. But why don't you have a go first, and then everyone else can > take the piss .....:-) > >
On Fri, 25 Jun 2004 08:08:07 -0400, Neil Truby wrote: > "Doug Lawry" <lawry@nildram.co.uk> wrote in message > news:cbh1po$lis$1@nntp0.reith.bbc.co.uk... >> On Suse 2.4.19, we also had to add a "chown" command to: >> >> /etc/init.d/boot.local > OK. > > >> Also, you should use raw (character) rather than block devices. > > Does it make any difference with OnLine? Yes. I have not yet tested the Linux RAW support myself, but I have heard it's on a par with other UNIX raw device support as to the speed gains over block devices. That is that RAW (char devices) can be 10-25% faster than COOKED (block) devices and either are another 5-15% faster than filesystem chunks in IDS. Art S. Kagel