[lttng-dev] Trace rotation across sessions

[Jérémie Galarneau]

On Tue, Mar 18, 2014 at 10:28 AM, Amit Margalit <AMITM at il.ibm.com> wrote:
> 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?

No. As far as I know, the session daemon will simply overwrite the files.

Jérémie

>
> 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
>
>



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