Hi guys , Probably you need to adjust some of the parameters like
max-epoch-size ; max-buffers ; sndbuf-size ; of the general drbd configuration file Please read also the following link https://serverfault.com/questions/740311/drbd-terrible-sync-performance-on-10gige BR Sent from my iPad > On 20 Aug 2018, at 10:15, Adrian Pascalau <adrian27ora...@gmail.com> wrote: > >> On Sun, Aug 19, 2018 at 1:39 AM, Eric Robinson <eric.robin...@psmnv.com> >> wrote: >> >> I’ve been using drbd for a decade, but this is my first experience with drbd >> 9.0.14. The resync is incredibly slow. Normally, resync takes a few seconds >> to a few minutes, but this is taking hours, advancing just a few hundredths >> of a percent every few seconds… >> > > Hi Eric, > > I am wondering, are you running drbd in physical hosts, or vitual machines? > > I am in a worse situation with the same version of drbd, installed in > two up to date Centos 7 virtual machines running in an OpenStack pike > environment, with the same version of drbd installed from the elrepo > repository: > > [root@drbd1 ~]# rpm -qa | grep kmod-drbd > kmod-drbd90-9.0.14-1.el7_5.elrepo.x86_64 > > I configured this environment last week Thursday, and believe it or > not, as of today sync is at 0.1%: > > [root@drbd1 ~]# cat > /sys/kernel/debug/drbd/resources/drbd0/connections/drbd2.novalocal/0/proc_drbd > 0: cs:SyncSource ro:Secondary/Secondary ds:UpToDate/Inconsistent C r----- > ns:6363972 nr:0 dw:0 dr:112432036 al:0 bm:0 lo:0 pe:[0;4] ua:52 > ap:[0;0] ep:1 wo:1 oos:5242556 > [>....................] sync'ed: 0.1% (5116/5116)M > finish: 127:25:23 speed: 0 (0 -- 0) K/sec > 0% sector pos: 0/10485368 > resync: used:1/61 hits:62 misses:2 starving:0 locked:0 changed:1 > act_log: used:0/1237 hits:0 misses:0 starving:0 locked:0 changed:0 > blocked on activity log: 0 > > Whatever I did, did not help, so finally I replicated the environment > in my laptop, in a VMware Workstation 11 environment, using the same > version of drbd, and in this case I have no issues. > > This is my first experience with drbd, so I do not know how to > troubleshoot. Now I am thinking to look into older 8.x version, that > might be working better. > > Regards, > Adrian > _______________________________________________ > drbd-user mailing list > drbd-user@lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user
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