> On 20 Oct 2015, at 16:55, Digimer <[email protected]> wrote: > > On 20/10/15 07:07 AM, Joeri Casteels wrote: >> Dear All, >> >> >> Doing a new set-up of DRBD on Ubuntu LTS 14.04 with stock DRBD >> When Setting to protocol A i get double the bandwidth as protocol C anybody >> an idea? not changing anything else of the settings except the protocol > > Protocol A an async, C is sync. So you're probably hitting the network > limit on C.
I don’t think so since it has a direct 20G trunk in-between with perf i get 19.6Gbit/s on single threat. With A (async when i monitor the network it also hits 2x the network speed as C does) > > https://drbd.linbit.com/users-guide/s-replication-protocols.html > >> PROTOCOL C: >> d if=/dev/zero of=/dev/drbd0 bs=1M count=20000 oflag=direct >> 20000+0 records in >> 20000+0 records out >> 20971520000 bytes (21 GB) copied, 46.3583 s, 452 MB/s >> >> PROTOCOL A: >> dd if=/dev/zero of=/dev/drbd0 bs=1M count=20000 oflag=direct >> 20000+0 records in >> 20000+0 records out >> 20971520000 bytes (21 GB) copied, 23.8356 s, 880 MB/s >> >> drbdsetup show r0 --show-defaults >> resource r0 { >> options { >> cpu-mask ""; # default >> on-no-data-accessible io-error; # default >> } >> net { >> protocol C; # default >> timeout 60; # 1/10 seconds, default >> max-epoch-size 8000; >> max-buffers 8000; >> unplug-watermark 16; >> connect-int 10; # seconds, default >> ping-int 10; # seconds, default >> sndbuf-size 2097152; # bytes >> rcvbuf-size 2097152; # bytes >> ko-count 7; # default >> allow-two-primaries no; # default >> cram-hmac-alg ""; # default >> shared-secret ""; # default >> after-sb-0pri disconnect; # default >> after-sb-1pri disconnect; # default >> after-sb-2pri disconnect; # default >> always-asbp no; # default >> rr-conflict disconnect; # default >> ping-timeout 5; # 1/10 seconds, default >> data-integrity-alg ""; # default >> tcp-cork yes; # default >> on-congestion block; # default >> congestion-fill 0s; # bytes, default >> congestion-extents 1237; # default >> csums-alg ""; # default >> verify-alg ""; # default >> use-rle yes; # default >> } >> _remote_host { >> address ipv4 172.16.252.8:7789; >> } >> _this_host { >> address ipv4 172.16.252.7:7789; >> volume 0 { >> device minor 0; >> disk "/dev/sdb"; >> meta-disk internal; >> disk { >> size 0s; # bytes, default >> max-bio-bvecs 0; # default >> on-io-error detach; # default >> fencing resource-only; >> disk-barrier no; # default >> disk-flushes no; >> disk-drain yes; # default >> md-flushes yes; # default >> resync-rate 250k; # bytes/second, default >> resync-after -1; # default >> al-extents 3389; >> al-updates yes; # default >> c-plan-ahead 20; # 1/10 seconds, default >> c-delay-target 10; # 1/10 seconds, default >> c-fill-target 100s; # bytes, default >> c-max-rate 102400k; # bytes/second, default >> c-min-rate 250k; # bytes/second, default >> disk-timeout 0; # 1/10 seconds, default >> read-balancing prefer-local; # default >> } >> } >> } >> } >> >> _______________________________________________ >> drbd-user mailing list >> [email protected] >> http://lists.linbit.com/mailman/listinfo/drbd-user >> > > > -- > Digimer > Papers and Projects: https://alteeve.ca/w/ > What if the cure for cancer is trapped in the mind of a person without > access to education? _______________________________________________ drbd-user mailing list [email protected] http://lists.linbit.com/mailman/listinfo/drbd-user
