[DRBD-user] How long does it take OOS to clear
lists at alteeve.ca
Mon Oct 21 18:09:25 CEST 2019
8.9.2 is the utils version, what is the kernel module version?
It's possible something paused sync, but I doubt it. You can try
'drbdadm resume-sync all'. The oos number should change constantly, any
time a block changes it should go up and every time a block syncs it
should go down.
What protocol are you using? A, B or C?
On 2019-10-21 11:31 a.m., G C wrote:
> I'm seeing OOS not being cleared for many days if not weeks, i.e. the
> OOS number stays the same.
> Is there a way to tell if the blocks that are OOS are changing or if
> it's the same ones that are just taking a very long time to sync with
> the secondary?
> Version: 8.9.2
> On Mon, Oct 7, 2019 at 7:55 AM Digimer <lists at alteeve.ca
> <mailto:lists at alteeve.ca>> wrote:
> Out of Sync is a question of what has changed locally versus what has
> reached the peer. It seems like you're generating changes on the Primary
> faster than the Secondary can receive them. So one answer is to speed up
> your replication link and/or the speed of the storage on the Secondary,
> depending on which is the bottle-neck.
> The other option is to switch to "Protocol C", which tells DRBD to not
> consider a write complete until it has reached both nodes. This will
> effectively slow down your Primary node's storage to whatever speed the
> Secondary can be written to, however, and may not be acceptable in your
> use case (see back to point 1 above).
> On 2019-10-07 10:40 a.m., G C wrote:
> > I have an instance that seems to get OOS down lower and once in a
> > it hits 0 but not very often. Typically my oos is about
> > is there a way to clear this outside of the verify which takes a long
> > time? Is there something deeper I can dig into that would stop
> the oos
> > from occurring?
> > Thank you
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"I am, somehow, less interested in the weight and convolutions of
Einstein’s brain than in the near certainty that people of equal talent
have lived and died in cotton fields and sweatshops." - Stephen Jay Gould
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