[lttng-dev] how to disable local file writing in relayd?

[lttng-dev] how to disable local file writing in relayd?

[Yuan Bin via lttng-dev]

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 Can I disable local-file-writing in lttng-relayd to avoid the disk space
overhead, only using it as a live viewer?

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Re: [lttng-dev] how to disable local file writing in relayd?

[Mathieu Desnoyers via lttng-dev]

On 2023-03-06 00:12, Yuan Bin via lttng-dev wrote:
>   Can I disable local-file-writing in lttng-relayd to avoid the disk 
> space overhead, only using it as a live viewer?

Not explicitly, but you can store your temporary files on a tmpfs file 
system (see lttng-relayd(8) --output command line parameter), which will 
only keep the relayd files in memory, and use the tracefile rotation 
feature to prevent the files from growing forever, e.g.:

https://lttng.org/docs/v2.13/#doc-enabling-disabling-channels

Example:Create a Linux kernel channel which rotates eight trace files of 
4 MiB each for each stream.

lttng enable-channel --kernel --tracefile-count=8 \
                      --tracefile-size=4194304 my-channel

See lttng-enable-channel(1) for more info.

I hope this helps!

Mathieu


-- 
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com

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[lttng-dev] Fwd: how to disable local file writing in relayd?

[Yuan Bin via lttng-dev]

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 Can I disable local-file-writing in lttng-relayd to avoid the disk space
overhead, only using it as a live viewer?

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Re: [lttng-dev] Fwd: how to disable local file writing in relayd?

[Mathieu Desnoyers via lttng-dev]

On 2023-03-22 02:39, Yuan Bin via lttng-dev wrote:
> 
> 
>   Can I disable local-file-writing in lttng-relayd to avoid the disk 
> space overhead, only using it as a live viewer?
> 

I am not sure why you bump this email thread. I already answered here. 
Perhaps you did not receive my reply ?

https://lists.lttng.org/pipermail/lttng-dev/2023-March/030358.html

Thanks,

Mathieu


-- 
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com

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Re: [lttng-dev] Fwd: how to disable local file writing in relayd?

[Yuan Bin via lttng-dev]

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Yeah, i haven't received the  reply before.

Thanks for your answer !

Mathieu Desnoyers <mathieu.desnoyers@efficios.com> 于2023年3月22日周三 21:25写道：

> On 2023-03-22 02:39, Yuan Bin via lttng-dev wrote:
> >
> >
> >   Can I disable local-file-writing in lttng-relayd to avoid the disk
> > space overhead, only using it as a live viewer?
> >
>
> I am not sure why you bump this email thread. I already answered here.
> Perhaps you did not receive my reply ?
>
> https://lists.lttng.org/pipermail/lttng-dev/2023-March/030358.html
>
> Thanks,
>
> Mathieu
>
>
> --
> Mathieu Desnoyers
> EfficiOS Inc.
> https://www.efficios.com
>
>

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