Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hello! We are planning to install DRBD and Xen on two new servers. We will buy the same hardware (32GB Ram, 8x SATA/SAS hard disks with hardware raid controller). We will have four virtual machines per server on a raid10 with 4 disks. In case of a failure 8 VMs on one server. The virtual machines will be heavily I/O-intensive ((q)mail, file and database). How can we achieve best performance? a) One big lvm with master-master drbd and raid10 (8 disks) over 10gibt Ethernet. Easy install and maintenance, fast sync. Is it really fast, if two masters write simultaneously? b) For the four virtual machines on each physical server a separated drbd on top of a raid10 (each 4 disks). The servers would be connected with one or two gigabit ports. There will be 4 disks on the master and 4 dedicated disks on the slave. Split brain shouldn't be a problem. Maybe we need more disks but it would be the same architecture. Thanks Martin