Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi,
I'm new with DRBD. I'm trying to setup dual primary nodes (VMs with
virtio-net of bonded of dual 10GbE links) with following resource config.
resource db {
> on db-1 {
> volume 0 {
> device /dev/drbd0 minor 0;
> disk /dev/vdc1;
> meta-disk internal;
> }
> address ipv4 10.10.130.9:7788;
> }
> on db-2 {
> volume 0 {
> device /dev/drbd0 minor 0;
> disk /dev/vdc1;
> meta-disk internal;
> }
> address ipv4 10.10.130.10:7788;
> }
> options {
> on-no-data-accessible io-error;
> }
> net {
> protocol C;
> allow-two-primaries yes;
> after-sb-0pri discard-zero-changes;
> after-sb-1pri discard-secondary;
> after-sb-2pri disconnect;
> sndbuf-size 1M;
> rcvbuf-size 2M;
> max-buffers 131072;
> max-epoch-size 20000;
> cram-hmac-alg sha1;
> shared-secret db;
> }
> disk {
> on-io-error detach;
> disk-flushes no;
> disk-barrier no;
> resync-rate 1G;
> al-extents 257;
> c-plan-ahead 8;
> c-fill-target 25M;
> c-max-rate 1G;
> c-min-rate 100M;
> }
> startup {
> wfc-timeout 30;
> outdated-wfc-timeout 20;
> degr-wfc-timeout 30;
> become-primary-on both;
> }
> }
I have tried to change some of variables, but no matter I have done, the
performance is just around 70MB/s like dd result below.
[root at db-1 ~]# dd if=/dev/zero of=/dev/drbd0 bs=4194304 count=1000
> 1000+0 records in
> 1000+0 records out
> 4194304000 bytes (4.2 GB) copied, 61.7918 s, 67.9 MB/s
The same test to the backing storage can give aroud 700MB/s performance.
What should I do with this case?
Best regards,
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