Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Thursday 02 September 2004 21:36, Christian Garling wrote:
> Hello people,
>
> i have a problem with synchronisation. i have 2 servers with escalade
> 7506-4P raid controller and three maxtor baracuda 160gb harddisks. they
> are connected through two intel eepro 1000 gigabit ethernet cards (bonding
> mode 0). when i comment out the rate setting in drbd.conf the initial sync
> runs with the default value of 250kb/s. but when i use the rate setting it
> only runs with about 12kb/s. i tested the connection with iptraf monitor
> and it seems everything to be ok. here is my actually configuration. its
> very basicly at the moment.
>
> resource r0 {
> protocol C;
> incon-degr-cmd "halt -f";
>
> startup {
> wfc-timeout 0;
> degr-wfc-timeout 120;
> }
>
> disk {
> on-io-error panic;
> }
>
> net {
> timeout 60; # 6 seconds (unit = 0.1 seconds)
> connect-int 10; # 10 seconds (unit = 1 second)
> ping-int 10; # 10 seconds (unit = 1 second)
> ko-count 5;
> on-disconnect reconnect;
> }
>
> syncer {
> rate 10M;
> }
>
> on node01 {
> device /dev/drbd0;
> disk /dev/sda1;
> address 10.0.0.10:7788;
> meta-disk internal;
> }
>
> on node02 {
> device /dev/drbd0;
> disk /dev/sda1;
> address 10.0.0.20:7788;
> meta-disk internal;
> }
> }
>
I would really onjoy to see such a cluster in real live (I mean one
that does only 12kb/s).
I installed a csync2/DRBD/heartbeat cluster yesterday. The two boxes
had 3Ware Escalades 9xxxx Controllers.
We did some primary crash simulation test and had 20MB/sec resync
simultaniously on two drbd-resources resyncing in parallel.
(rate was set to 20M. Probabely these machines would do even more)
Here the usual questions:
Have you tested the bandwith of your network link ? How ? What numbers
do you get ?
Have you tested the bandwith of your disks ? How ? What numbers
do you get ?
Which kernel ? Which drbd release ? Hardware ?
Have you tested without bonding ?
Are you using jumbo-frames ? MTU ?
-Philipp
--
: Dipl-Ing Philipp Reisner Tel +43-1-8178292-50 :
: LINBIT Information Technologies GmbH Fax +43-1-8178292-82 :
: Schönbrunnerstr 244, 1120 Vienna, Austria http://www.linbit.com :