From mboxrd@z Thu Jan 1 00:00:00 1970 From: mathieu.desnoyers@efficios.com (Mathieu Desnoyers) Date: Tue, 21 Apr 2020 10:23:03 -0400 (EDT) Subject: [lttng-dev] Have live session and rotation together In-Reply-To: References: Message-ID: <211031090.61650.1587478983634.JavaMail.zimbra@efficios.com> ----- On Apr 20, 2020, at 4:17 PM, lttng-dev lttng-dev at lists.lttng.org wrote: > Hi all, > > When creating live session (lttng create --live) I can not enable rotation: > > # lttng enable-rotation --size=10M > Error: Failed to enable size-based rotation schedule on session BX This is indeed the expected behavior. > > In LTTNG 2.12 rotation is supported for network streaming mode but it > was not yet supported in 2.11. I do not think this statement is factually correct. I recall that session rotation was available for sessions being streamed over the network. What makes you think otherwise ? > > Is there architectural reasons why we can't have live session with rotation? > Or is it just not implemented yet? In that case in what version is it > expected to appear? It is not impossible design-wise, but would make the implementation much more complex and require a very significant testing effort. Considering that there are few compelling use-cases for using both features together, and no customer have expressed interest in this, it is not part of our roadmap. Thanks, Mathieu -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com