Imre Oolberg
2008-Sep-11 19:21 UTC
[Xen-users] question about disk = [ ''phy:/dev/vg1/vol1, sda, w!'' ] construct
Hallo! The other day i browsed thru readings about Xen, esp. http://www.virtuatopia.com/index.php/Adding_Disk%2C_CDROM_and_DVD_Devices_to_a_Running_Xen_domainU_Guest_System#An_Overview_of_xm_block-attach and encountered an interesting construct about having multiple domU to have rw access to the same storage simultaneously like that disk = [ ''phy:/dev/vg1/vol1,sda,w!'' ] Though xm man page or xm create --help_config does not mention it neither on Debian Etch (v 3.0) or on Ubuntu Hardy (v 3.2) it seems to work (i tried it very briefly under Ubuntu Hardy (8.0.4, latest stable, 64 bit version). Since i am interesting to try out Oracle RAC configuration it could be very handy to use Xen for that purpose. If anybody could give a comment or share experience about the status of that paticular ''w!'' option, it would be very good! I.e. is it suitable also for production use etc. Thanks and best regards, Imre _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Sadique Puthen
2008-Sep-11 20:34 UTC
Re: [Xen-users] question about disk = [ ''phy:/dev/vg1/vol1, sda, w!'' ] construct
Imre Oolberg wrote:> Hallo! > > The other day i browsed thru readings about Xen, esp. > > http://www.virtuatopia.com/index.php/Adding_Disk%2C_CDROM_and_DVD_Devices_to_a_Running_Xen_domainU_Guest_System#An_Overview_of_xm_block-attach > > > and encountered an interesting construct about having multiple domU to > have rw access to the same storage simultaneously like that > > disk = [ ''phy:/dev/vg1/vol1,sda,w!'' ] > > Though xm man page or xm create --help_config does not mention it > neither on Debian Etch (v 3.0) or on Ubuntu Hardy (v 3.2) it seems to > work (i tried it very briefly under Ubuntu Hardy (8.0.4, latest > stable, 64 bit version). > > Since i am interesting to try out Oracle RAC configuration it could be > very handy to use Xen for that purpose. If anybody could give a > comment or share experience about the status of that paticular ''w!'' > option, it would be very good! I.e. is it suitable also for production > use etc.It''s suitable provided you use a clustered filesystem. --Sadique> > > Thanks and best regards, > > Imre > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Imre Oolberg
2008-Sep-12 08:40 UTC
Re: [Xen-users] question about disk = [ ''phy:/dev/vg1/vol1, sda, w!'' ] construct
Hallo! Thank you for the reply, and yes exactly, i have in mind using such a kind of application which takes responsibility for accessing simultaneously the same device from several places. I am also interested if on Xen with this w! options is Oracle RAC known to work? I have in mind Oracle 10R2 database version 10.2.0.4.0, 64bit, and intention is to use SLES10 as domU operating system, i believe i am quite free choosing dom0 operating system. Before i discovered w! option i have used shared storage over iscsi but w! seem to be more straight-forward. Imre Sadique Puthen wrote:> Imre Oolberg wrote: >> Hallo! >> >> The other day i browsed thru readings about Xen, esp. >> >> http://www.virtuatopia.com/index.php/Adding_Disk%2C_CDROM_and_DVD_Devices_to_a_Running_Xen_domainU_Guest_System#An_Overview_of_xm_block-attach >> >> >> and encountered an interesting construct about having multiple domU to >> have rw access to the same storage simultaneously like that >> >> disk = [ ''phy:/dev/vg1/vol1,sda,w!'' ] >> >> Though xm man page or xm create --help_config does not mention it >> neither on Debian Etch (v 3.0) or on Ubuntu Hardy (v 3.2) it seems to >> work (i tried it very briefly under Ubuntu Hardy (8.0.4, latest >> stable, 64 bit version). >> >> Since i am interesting to try out Oracle RAC configuration it could be >> very handy to use Xen for that purpose. If anybody could give a >> comment or share experience about the status of that paticular ''w!'' >> option, it would be very good! I.e. is it suitable also for production >> use etc. > > It''s suitable provided you use a clustered filesystem. > > --Sadique > >> >> Thanks and best regards, >> >> Imre >> >> _______________________________________________ >> Xen-users mailing list >> Xen-users@lists.xensource.com >> http://lists.xensource.com/xen-users >> > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users