Re: [OpenAFS] moving a RW volume which several RO copies : when the vos release becomes a "complete release" ? addenda

2025-02-27 Thread Michael Meffie 
On Thu, 27 Feb 2025 11:24:11 +0100
Giovanni Bracco  wrote:

> Hello!
> Recently, when upgrading the OS of a file server, we have moved only the
> RW volumes to an already upgraded fileserver, leaving the RO copies on
> several sites where they were.
> 
> When the upgrade was completed we have moved back the RW on the original
> fileserver.
> 
> RW Volumes where NOT modified in the meanwhile but when issuing a "vos
> release" it becomes nevertheless a "complete release" and this is
> annoying as the sites connections have an rtt of about 5 ms and rx
> performance is limited to about 10 MB/s.
> 
> So the question is:
> 
> why the  vos release becomes a full release if the RW volume is just
> moved between fileservers, not modified anyway?
> 
> Sorry I have not specified the OS and the OpenAFS versions
> 
> the upggrade has been from CentOS7.9/openafs 1.8.11
> to Almalinux9.5/openafs 1.8.13
 
Hello Giovanni,

Sorry about the painful release. Do you have the text of the vos output?

I suspect the full release was triggered because the read-only clone was
missing since the read-write volume was moved.  Ever since OpenAFS 1.0,
vos will fall back to a full release when the read-only clone is missing
when the release is started.  In general, vos release tends to be
conservative and falls back to a full release to cover corner cases
to make sure the release is complete.

Mike --

-- 
Michael Meffie 
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[OpenAFS] moving a RW volume which several RO copies : when the vos release becomes a "complete release" ? addenda

2025-02-27 Thread Giovanni Bracco 

Hello!
Recently, when upgrading the OS of a file server, we have moved only the
RW volumes to an already upgraded fileserver, leaving the RO copies on
several sites where they were.

When the upgrade was completed we have moved back the RW on the original
fileserver.

RW Volumes where NOT modified in the meanwhile but when issuing a "vos
release" it becomes nevertheless a "complete release" and this is
annoying as the sites connections have an rtt of about 5 ms and rx
performance is limited to about 10 MB/s.

So the question is:

why the  vos release becomes a full release if the RW volume is just
moved between fileservers, not modified anyway?

Sorry I have not specified the OS and the OpenAFS versions

the upggrade has been from CentOS7.9/openafs 1.8.11
to Almalinux9.5/openafs 1.8.13

Giovanni

--
Giovanni Bracco
phone  +39 351 8804788
E-mail  [email protected]
WWW http://www.afs.enea.it/bracco 





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[OpenAFS] moving a RW volume which several RO copies : when the vos release becomes a "complete release" ?

2025-02-27 Thread Giovanni Bracco 

Hello!
Recently, when upgrading the OS of a file server, we have moved only the
RW volumes to an already upgraded fileserver, leaving the RO copies on
several sites where they were.

When the upgrade was completed we have moved back the RW on the original
fileserver.

RW Volumes where NOT modified in the meanwhile but when issuing a "vos
release" it becomes nevertheless a "complete release" and this is
annoying as the sites connections have an rtt of about 5 ms and rx
performance is limited to about 10 MB/s.

So the question is:

why the  vos release becomes a full release if the RW volume is just
moved between fileservers, not modified anyway?

Giovanni

--
Giovanni Bracco
phone  +39 351 8804788
E-mail  [email protected]
WWW http://www.afs.enea.it/bracco 





Questo messaggio e i suoi allegati sono indirizzati esclusivamente alle persone 
indicate e la casella di posta elettron ica da cui è stata inviata è da 
qualificarsi quale strumento aziendale.

La diffusione, copia o qualsiasi altra azione derivante dalla conoscenza di 
queste informazioni sono rigorosamente viet ate (art. 616 c.p, D.Lgs. n. 
196/2003 s.m.i. e GDPR Regolamento - UE 2016/679).

Qualora abbiate ricevuto questo documento per errore siete cortesemente pregati 
di darne immediata comunicazione al mit tente e di provvedere alla sua 
distruzione. Grazie.

This e-mail and any attachments is confidential and may contain privileged 
information intended for the addressee(s) only.

Dissemination, copying, printing or use by anybody else is unauthorised (art. 
616 c.p, D.Lgs. n. 196/2003 and subsequen t amendments and GDPR UE 2016/679).

If you are not the intended recipient, please delete this message and any 
attachments and advise the sender by return e -mail. Thanks.

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