[Samba] Random permission denied and path not found errors

[Tamás Papp]

Exactly, that's what we experience.
In some cases, files or directories not found ("Path not found") or a 
permission error is interpreted that way. That's a read error.

In other cases, clients receive permission denied for writing a file.

On June 22, 2024 12:44:28 Andrea Venturoli <ml at netfence.it> wrote:

> On 6/17/24 22:46, Tamas Papp via samba wrote:
>
>> Is there anybody on the list, who is familiar with a similar use case: a
>> VFX workload backend or a storage server with a (relatively) lot of
>> files and parallel clients (read and write) and about 1-4 Gb/s traffic
>> load?
>
> Hello.
>
> I'm not even sure I know what you mean by "VFX workload" exactly.
> However the problem you describe looks a lot like the one I see with a
> "developer's" workload (i.e. compiling on a client while accessing
> source/headers on a Samba server, which also means opening thousands of
> small files).
> Sometimes compilation will fail on the claim that some file does not
> exist: the file is there and a subsequent retry will succeed.
> What I noticed is that more (Samba unrelated) load on the server will
> make this a lot more likely.
> I.e. run a compilation on the client when the server is idle and it will
> almost always succeed; run a completely unrelated compilation on the
> server (on files not involved in the client compilation) and the client
> will almost always fail.
> I've not been able to debug this yet (although it's been going on
> possibly for years).
>
> Please also read my latest thread ("Samba suddenly acting strangely​")
> where this is one of the problems I was talking about.
>
> Unfortunately, I've really nothing to suggest to you right now, but I
> hope we can keep in touch in case one of us finds something interesting.
>
>  bye & Thanks
> 	av.