[OpenIndiana-discuss] auto-snapshot replicate problems

[John McEntee]

Just reply just in-case someone else comes across this post.

Altering the time-slider daemon would be tricky, but writing my own with a
crontab would still take some time to replicate all the features I would
like (clearing up old snapshots etc.)

As the auto-replicate script is use ( any other script would be the same)
needs to know the last destination snapshot and the current sending
snapshot. I have implemented a simple zfs hold and zfs release to lock the
last snapshot sent (tag of destination hostname) and release the previous
one.

John
-----Original Message-----
From: Milan Jurik [mailto:milan.jurik at xylab.cz] 
Sent: 14 March 2012 11:01
To: Discussion list for OpenIndiana
Subject: Re: [OpenIndiana-discuss] auto-snapshot replicate problems

Hi,

I think time-slider daemon is in JDS consolidation. But the question is
- why do you want to hack it and maintain own hack? Why not to create zfs
snapshots by own crontab entry?

Best regards,

Milan

On 14.03.2012 12:38, John McEntee wrote:
> I have a problem trying to keep a second fileserver in sync with the 
> primary one.
>
>
>
> I have a script (auto-replicate) that I have slightly altered that 
> basically
> checks the latest snapshot of the both  master server and the dr 
> server. It
> then does a send -I if there is a difference. This used to work fine 
> in the
> old versions of the time-slider service.
>
>
>
> The problem I have is the later version of the time-slider service in
> OpenIndiana cleans up old snapshots of zero size, which means the 
> latest
> snapshot on the dr server no longer exists on the master server so 
> the send
> -I fails.
>
>
>
> My fix would be to hack the time-slider service to not clean up the 
> zero
> size snapshots. Please can anyone point me in the right direction? I 
> cannot
> even find the code at the moment. I would also be interested in any 
> other
> solutions
>
>
>
> Thanks
>
>
>
> John
>
>
>
>

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