Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Which I/O scheduler (elevator) are you using on the (real) block devices that your DRBDs reside on? Florian Jan Kellermann wrote: > Hi, > > we have 2 servers on centos5.2 in a cluster with the redhat cman in the > configuration > > SERVER1 > LVM \ > CMAN DRBD > XEN > SERVER2 > LVM / > > For each xen we create a new local LVM on each node, put them in a drbd > and install an os (debian 4 or ubuntu 8). The xens are running as pvm. > > Everything works fine since over 4 months now. > > But we have some performance-Problems: > > Writing on the Xen-devices produces an iowait about 50 to 60% on the > xen-processors. > [...] -- : Florian G. Haas : LINBIT Information Technologies GmbH : Vivenotgasse 48, A-1120 Vienna, Austria When replying, there is no need to CC my personal address. I monitor the list on a daily basis. Thank you. LINBIT® and DRBD® are registered trademarks of LINBIT.