[DRBD-user] PingAck did not arrive in time.
o.evin at onefc.com
Mon Jun 24 15:39:07 CEST 2019
We are using this volume for video editing, mainly it's video/audio/photo storage plus some project files replicated twice (previously 3 times). On a physical level single node contains 6x12 bay RAID0 enclosures joined into a logical volume. I've been playing earlier with a different configuration, like setting up a DRBD resource for each enclosure, then join it into a logical volume, but finally decided to go with a single volume due to simplicity despite some loss in replication speed. At this moment we're able to achieve about 1.2GB while replication which is little bit slower then a single enclosure speed, but enough for all our needs. Potentially we may grow up above PB next year or two. Do you advise any different setup?
On 24 Jun 2019, 20:17, at 20:17, Lars Ellenberg <lars.ellenberg at linbit.com> wrote:
>On Fri, Jun 21, 2019 at 02:33:08PM +0200, Robert Altnoeder wrote:
>> On 6/21/19 9:16 AM, Oleksiy Evin wrote:
>> > I've tried to update the kernel and DRBD 9 to the last available
>> > version, but nothing helped with the PingAck issue. So I had to
>> > downgrade to DRBD 8.4 which is started to replicate fine
>> > [...]
>> > Can anyone help me on the "PingAck did not arrive in time."
>> > error while initial bitmap synchronization?
>> > [...]
>> > I'm using the basic drbd configuration on 527TB LVM volume
>> This is not generally a version problem, except maybe for the
>> performance side effects of various versions. It's probably actually
>> size problem. Bitmap operations on a 527 TB volume take some time to
>> processed, and some operation probably blocks one of the DRBD kernel
>> threads long enough to cause DRBD to be too slow to answer a DRBD
>> request from its peer.
>> There is an option "ping-timeout" (in the "net" section, the value
>> in tenth of a second) that can be adjusted to change the ping
>And for various reasons, not least of them, performance considerations,
>using a single DRBD volume of that size is most likely not what you
>If you really mean it, it will likely require a number of deviations
>from "default" settings to work reasonaly well.
>Do you mind sharing with us what you actually want?
>What do you mean to use that volume for?
>: Lars Ellenberg
>: LINBIT | Keeping the Digital World Running
>: DRBD -- Heartbeat -- Corosync -- Pacemaker
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