[DRBD-user] drbd questions

screenie alex at joelly.net
Fri Feb 26 20:05:45 CET 2010

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

i found some posts about optimizing performance, reduced from three nic's to
two in bonding mode 0 as i found a recommendation that it will not scale
above two (from the drbd performance tuning webinar);

so played around a bit but always have low sync-performance with drbd at
74mb what is 1/3 from the available bandwidth to the other node;
whatever i set with the parameters i will not get more throughput;

i assume that the rest of the performance is lost on latency on protocol c
on my hardware and therefore tuning some parameters in drbd.conf will not
take effect - is this correct?

so, for protocol c a low-latency environment will bring better performance,
maybe infiniband and sas harddisks;

my hardware are a dual intel gbit server adapter bonded together with mode
0, direct-connected between the nodes with mtu of 16k and some other network
tuning, a hardware raid6 with 8 sata harddisks;

did someone have some comparisons or can post his performance value and
hardware which is used to get a feeling what is possible with which


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