[lttng-dev] Trace rotation across sessions

[Amit Margalit]

It may be what I am looking for.

Are you saying that lttng-sessiond will pick up the session from whereever 
it is and continue it?

BTW, I am using only UST for now.

Amit Margalit
IBM XIV - Storage Reinvented
XIV-NAS Development Team
Tel. 03-689-7774
Fax. 03-689-7230



From:   Jérémie Galarneau <jeremie.galarneau at efficios.com>
To:     Amit Margalit/Israel/IBM at IBMIL
Cc:     lttng-dev <lttng-dev at lists.lttng.org>
Date:   03/18/2014 04:19 PM
Subject:        Re: [lttng-dev] Trace rotation across sessions
Sent by:        jeremie.galarneau at gmail.com



On Tue, Mar 18, 2014 at 4:52 AM, Amit Margalit <AMITM at il.ibm.com> wrote:
> Hello,
>
> Our system has a running session that stays on continuously.
>
> Occasionally, our customer will upgrade the software, leading to a 
reboot,
> which in turn means we will have a new session.
>
> Is there any way to make LTTng aware of the total size of all sessions
> (current and past) and simply rotate files to keep the entire set of 
traces
> under a size limit?
>

The only way I can see this working is by recreating the same session
configuration (with the same output destination) and using lttng
enable-channel's -C (tracefile-size) and -W (tracefile-count) options
to define an upper bound on each trace's size.

Is this what you are looking for?

Jérémie

> Thanks,
>
> Amit Margalit
> IBM XIV - Storage Reinvented
> XIV-NAS Development Team
> Tel. 03-689-7774
> Fax. 03-689-7230
> _______________________________________________
> lttng-dev mailing list
> lttng-dev at lists.lttng.org
> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
>



-- 
Jérémie Galarneau
EfficiOS Inc.
http://www.efficios.com


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