[packman] PMBS running more stable again, was: Re: can't commit to pmbs

Stefan Botter jsj at jsj.dyndns.org
Sun May 10 10:36:47 CEST 2020

Hi packmans,

Am Montag, 4. Mai 2020, 07:29:32 CEST schrieb Stefan Botter:
> The problems with my Synology seem to originate from incompatibilities
> between ESXi's (software) implementation of the iscsi client, and the
> most probably crappy software implementation of the iscsi initiator
> on the Synology. Reading through the Synology forum convinced me, not
> to use iscsi with the Syno anymore.
> I will migrate all machines to a slow temporary storage and set up the
> main storage with NFS, and move everything back. I will try to do so
> today and tomorrow, as I am in the office right now, and can respond
> rather quickly, if problems arise again. Please expect some downtime,
> I will notify you, when I have done moving everything back and forth.

On Monday I discovered a recent firmware upgrade with fixes for ISCSI 
stability for the Synology DS620, and installed it. As expected, this 
did not fix the situation, communication between ESXi and the Synology 
stopped again during heave traffic to storage.
On Tuesday I migrated everything to a spare Synology DS415+ with 3 1.5TB 
spinning disks and a 256GB SSD for read cache, configured with NFS 
instead of ISCSI. Wednesday in the Afternoon I started moving everything 
back to the DS620, now connected via NFS 4.1 and redundant paths (which 
I did not use before, as I always used ISCSI or FC for redundancy).
This is up-to-now rock-solid, there are almost no messages in the ESXi's 
All transfers finished on Thursday around 5 p.m., and PMBS is back to 
its expected speed and - I hope - stability.


Stefan Botter zu Hause
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