<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Verdana; font-size: 10pt; color: #000000'>Oops, replied to previous without adjusting the subject line...<br><br><br>----- "Wendell Dingus" <wendell@bisonline.com> wrote:
<br>> <style>p { margin: 0; }</style><div style="font-family: Verdana; font-size: 10pt; color: rgb(0, 0, 0);">> Xen + DRBD problem... CentOS 5.2 32-bit with working 20GB shared DRBD partition.<br>> <br>> # rpm -qf /etc/xen/scripts/block-drbd<br>> drbd82-8.2.6-1.el5.centos<br>> # drbdadm state r0<br>> Primary/Primary<br>> <br>> Works fine referencing it as a phy: device...<br>> # grep disk domutest<br>> disk = [ "phy:/dev/drbd0,xvda,w" ]<br>> <br>> # xm create domutest<br>> Using config file "./domutest".<br>> Started domain domutest<br>> <br>> Not so much using the DRBD supplied Xen block handler...<br>> # grep disk domutest<br>> disk = [ "drbd:r0,xvda,w" ]<br>> <br>> # xm create domutest<br>> Using config file "./domutest".<br>> No handlers could be found for logger "xend"<br>> Error: Disk isn't accessible<br>> <br>> Any suggestions?<br>> Thanks...<br>> <br>> <br>> ----- "Oliver Welter" <mail@oliwel.de> wrote:
<br>> > -----BEGIN PGP SIGNED MESSAGE-----<br>> > Hash: SHA1<br>> > <br>> > Hi All,<br>> > <br>> > I used drbd 0.7 a while with protocol B which did fine.<br>> > <br>> > I migrated the servers and due to the comment in the sample config, that<br>> > currently C is considered faster than B, I switched to C but now get<br>> > extreme iowaits even in really low load situations.<br>> > The system is a dual CPU AMD Quad Opteron and system load raises to >15<br>> > and I get 80% waits. DRBD runs over a low latency (~0.1ms) Gigabit Link.<br>> > <br>> > I now wanted to switch the system to protocol B or even A, is there a<br>> > way to do so without shutting down the disks? I have a total of 8 drbd<br>> > devices on the box.<br>> > <br>> > TIA<br>> > <br>> > Oliver<br>> > - --<br>> > Protect your environment - close windows and adopt a penguin!<br>> > PGP-Key: 3B2C 8095 A7DF 8BB5 2CFF 8168 CAB7 B0DD 3985 1721<br>> > -----BEGIN PGP SIGNATURE-----<br>> > Version: GnuPG v2.0.7 (GNU/Linux)<br>> > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org<br>> > <br>> > iD8DBQFI30r/yrew3TmFFyERAsGLAJ94qlMXjHtmkv+YvxgoNSuYvMg1aQCePOtz<br>> > T1zX86tChP+6Kucqfr7QS5k=<br>> > =zjKL<br>> > -----END PGP SIGNATURE-----<br>> > _______________________________________________<br>> > drbd-user mailing list<br>> > drbd-user@lists.linbit.com<br>> > http://lists.linbit.com/mailman/listinfo/drbd-user<br>> > </div><br>> _______________________________________________
drbd-user mailing list
drbd-user@lists.linbit.com
http://lists.linbit.com/mailman/listinfo/drbd-user
</div></body></html>