Re: 回复:Re: 回复:Re: Pros and Cons of LTTng

From: 杨海 <hai.yang@magic-shield.com>
To: "Mathieu Desnoyers" <mathieu.desnoyers@efficios.com>
Cc: lttng-dev <lttng-dev@lists.lttng.org>
Subject: Re: 回复:Re:  回复:Re:  Pros and Cons of LTTng
Date: Tue, 30 Jul 2019 08:34:32 +0800	[thread overview]
Message-ID: <tencent_3F4BC66C590FBA9B49519E62__20419.1765211121$1564447872$gmane$org@qq.com> (raw)
In-Reply-To: <438504875.11742.1564069712337.JavaMail.zimbra@efficios.com>

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Hi Mathieu,

Thanks. I am looking for packages for older distributions like CentOS 6 (with kernel 2.6) but could not find it. And which kernel version is minimum requirement for LTTng?

Regards
Hai

------------------ Original ------------------
From:  "Mathieu Desnoyers"<mathieu.desnoyers@efficios.com>;
Date:  Thu, Jul 25, 2019 11:48 PM
To:  "杨海"<hai.yang@magic-shield.com>; 
Cc:  "Jonathan Rajotte"<jonathan.rajotte-julien@efficios.com>; "lttng-dev"<lttng-dev@lists.lttng.org>; 
Subject:  Re: [lttng-dev] 回复:Re:  回复:Re:  Pros and Cons of LTTng

----- On Jul 25, 2019, at 4:21 PM, 杨海 <hai.yang@magic-shield.com> wrote:

Hi

Thanks for quick response. 
LTTng is really impressive on performance，especially under heavy workload. When using it on critical machines，stability is also essential. 
I wonder how LTTng is commercialized and any products or OS distributions already enabled it. 
I took a look at lttng-modules bug list，there are a few kernel oops years ago and got resolved. May I say it is very stable or it has not been fully tested? 

Hi,

EfficiOS has had commercial customers using LTTng in production for many years now.
LTTng per-se is distributed as packages in all major Linux distributions. EfficiOS also provides

more up-to-date packages for some distributions through http://packages.efficios.com/

The way we commercialize LTTng is through funding for design and implementation of
customer's feature requests. We also provide commercial support tailored to specific
customer's environments, which includes SLA and continuous integration testing of specific
environments.

If those are services you are interested in, please feel free to contact us in private so we
can further discuss your needs.

Best regards,

Mathieu

regards
Hai

--------------原始邮件--------------
发件人："Jonathan Rajotte-Julien "<jonathan.rajotte-julien@efficios.com>;
发送时间：2019年7月23日(星期二) 上午6:20
收件人："杨海" <hai.yang@magic-shield.com>;
抄送："lttng-dev "<lttng-dev@lists.lttng.org>;
主题：Re:  回复:Re: [lttng-dev] Pros and Cons of LTTng
-----------------------------------

 Hi,

> As to LD_PRELOAD, it is also used for privilege escalation. Will it be regarded as vulnerability and forbidden on some Linux systems?

It could yes.
In that case you will be limited to the syscalls interface for the libc
observability unless you instrument it and distribute it.

Cheers.

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-- 

Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com

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