[SOLVED] Settings DRBD doesnt presist after reboot global_common.conf

[tytanick]

Hi,

Settings written to global_common.conf doesnt work:

root@node2:/etc/drbd.d# cat global_common.conf
# DRBD is the result of over a decade of development by LINBIT.
# In case you need professional services for DRBD or have
# feature requests visit http://www.linbit.com

global {
        usage-count no;
        # minor-count dialog-refresh disable-ip-verification
        # cmd-timeout-short 5; cmd-timeout-medium 121; cmd-timeout-long 600;
}

common {
        handlers {
                # These are EXAMPLE handlers only.
                # They may have severe implications,
                # like hard resetting the node under certain circumstances.
                # Be careful when chosing your poison.

                # pri-on-incon-degr "/usr/lib/drbd/notify-pri-on-incon-degr.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ; reboot -f";
                # pri-lost-after-sb "/usr/lib/drbd/notify-pri-lost-after-sb.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ; reboot -f";
                # local-io-error "/usr/lib/drbd/notify-io-error.sh; /usr/lib/drbd/notify-emergency-shutdown.sh; echo o > /proc/sysrq-trigger ; halt -f";
                # fence-peer "/usr/lib/drbd/crm-fence-peer.sh";
                # split-brain "/usr/lib/drbd/notify-split-brain.sh root";
                # out-of-sync "/usr/lib/drbd/notify-out-of-sync.sh root";
                # before-resync-target "/usr/lib/drbd/snapshot-resync-target-lvm.sh -p 15 -- -c 16k";
                # after-resync-target /usr/lib/drbd/unsnapshot-resync-target-lvm.sh;
        }

        startup {
                # wfc-timeout degr-wfc-timeout outdated-wfc-timeout wait-after-sb
        }

        options {
                # cpu-mask on-no-data-accessible
        }

        disk {
      on-io-error             detach;
        no-disk-flushes ;
        no-disk-barrier;
        c-plan-ahead 10;
        c-fill-target 24M;
        c-min-rate 10M;
        c-max-rate 100M;
                # size on-io-error fencing disk-barrier disk-flushes
                # disk-drain md-flushes resync-rate resync-after al-extents
                # c-plan-ahead c-delay-target c-fill-target c-max-rate
                # c-min-rate disk-timeout
        }

        net {
                protocol C;
        # max-epoch-size          20000;
        max-buffers             36k;
        sndbuf-size            1024k ;
        rcvbuf-size            2048k;

                # allow-two-primaries yes;
                # protocol timeout max-epoch-size max-buffers unplug-watermark
                # connect-int ping-int sndbuf-size rcvbuf-size ko-count
                # allow-two-primaries cram-hmac-alg shared-secret after-sb-0pri
                # after-sb-1pri after-sb-2pri always-asbp rr-conflict
                # ping-timeout data-integrity-alg tcp-cork on-congestion
                # congestion-fill congestion-extents csums-alg verify-alg
                # use-rle
        }
}

But if i write those settings to:
/var/lib/drbd.d/drbdmanage_global_common.conf
They DO work after /etc/init.d/drbd restart , but after reboot they dont and the file is empty.
Anybody know how to solve it ?
Where should be settings ?
P.S withouts those settings sync speed is like 20mbit/s but with those settings speed is 800mbit/s

 

[fabian]

according to the drbd devs, the values in /var/lib/drbd.d/drbdmanage_global_common.conf
should be set via drbdmanage, not by manually editing the file.

 

[tytanick]

thx for info.
So i sould set in rc.local proper drbdmanage command then

 

[fabian]

if I understood correctly, setting it once via drbdmanage should suffice

 

[tytanick]

THX !!!!
I finally solved it

Scenario:
Fresh booted nodes.
I am creating new disk via GUI. Syncing starts and presist at about 20-30mbits/s
Then i just simply execute this command to only one node (it will automaticly send to other nodes too)
you can monitor if changes apply by:

watch 'cat /var/lib/drbd.d/drbdmanage_global_common.conf'

atop 2

Commands that execute new settings are: (this if for 1 gbit link, if you have more play with c-fill-target or others)

drbdmanage net-options --common --max-buffers 131071 --max-epoch-size 20000 --sndbuf-size 2048000 --rcvbuf-size 2048000
drbdmanage peer-device-options --common --c-max-rate 4194304 --c-plan-ahead 10 --c-fill-target 20000

If it presists after reboot then great. if it doesnt just simply add to rc.local or in cron perhaps.
Anyway this is finally solved

Also in cache mode in VM i set directsync and i have more iops inside VM. (I presime that is safe ?)