[OpenAFS] automatic replication of ro volumes

[Andreas Ladanyi]

Hi,

it is common an openafs admin has to sync an ro volume after something
is added to rw volume. This is done by the vos release command. I think
its the only way. Are there automatic sync functions in the vol / fs server.

Andreas

[Jeffrey Altman]

Post by Andreas Ladanyi
Hi,
it is common an openafs admin has to sync an ro volume after something
is added to rw volume. This is done by the vos release command. I think
its the only way. Are there automatic sync functions in the vol / fs server.

The risk of automated volume releases is that the automated system does
not know when the volume contents are in a consistent and quiescent state.

Sites often use remctl to grant end users the ability to release their
own volumes.

Automated releases of RO volumes are a poor substitute for replicated RW
volumes. RW replication is a feature which was never completed for OpenAFS.

Jeffrey Altman

[Andreas Ladanyi]

Hi Jeffrey,

Post by Jeffrey Altman

Post by Andreas Ladanyi
it is common an openafs admin has to sync an ro volume after something
is added to rw volume. This is done by the vos release command. I think
its the only way. Are there automatic sync functions in the vol / fs server.

The risk of automated volume releases is that the automated system does
not know when the volume contents are in a consistent and quiescent state.

ok, but vos release "knows" them ?

Is there something against a crontab script as root with vos lock and
vos release to all volumes (with an ro site)  ?

Post by Jeffrey Altman
Sites often use remctl to grant end users the ability to release their
own volumes.
Automated releases of RO volumes are a poor substitute for replicated RW
volumes. RW replication is a feature which was never completed for OpenAFS.
Jeffrey Altman

Andreas

[Steve Simmons]

Cron has no more knowledge about when the r/w volume is in a consistent
state than does AFS. Only the person(s) who make the changes to the r/w
volume know when it's ready to release.

Steve Simmons
ITS Unix Support/SCS Admins

Post by Andreas Ladanyi
Hi Jeffrey,

Post by Jeffrey Altman

Post by Andreas Ladanyi
it is common an openafs admin has to sync an ro volume after something
is added to rw volume. This is done by the vos release command. I think
its the only way. Are there automatic sync functions in the vol / fs

server.

Post by Jeffrey Altman
The risk of automated volume releases is that the automated system does
not know when the volume contents are in a consistent and quiescent

state.
ok, but vos release "knows" them ?
Is there something against a crontab script as root with vos lock and
vos release to all volumes (with an ro site) ?

Post by Jeffrey Altman
Sites often use remctl to grant end users the ability to release their
own volumes.
Automated releases of RO volumes are a poor substitute for replicated RW
volumes. RW replication is a feature which was never completed for

OpenAFS.

Post by Jeffrey Altman
Jeffrey Altman

Andreas
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