Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On 25.04.2013 14:04, GG-Net Mailing wrote: > Hello, > > i'm running drbd on two Debian Wheezy x64 servers. > > I'm using protocol A for asynchronous sync, since one of the machines has a hybrid RAID10 on an adaptec 71605Q. Build of 2x 3TB Seagate Constellation CS SED and 2x Samsung 840 500GB. And the other only has a plain 1TB HDD. > > If I run a simple dd test on the node with the RAID copying from /dev/zero to a file on the device with drbd disabled, I get results around 400mb/s. > > The moment I start drbd with the node as primary and run the test again, my results are roughly 110mb/s. > > Are there any known issues regarding this? Yes, don't expect wonders from your 1 GbE network link or the single HDD on the secondary! 1 Gbit/s / 8 = 128 MB/s. More isn't possible with 1 GbE. If disconnected, the data doesn't have to travel through the network to the secondary. Simple as that. Cheers, Sebastian