From: David Ahern <lxhacker68@gmail.com>
To: nicolas.dichtel@6wind.com, Cong Wang <cwang@twopensource.com>
Cc: netdev <netdev@vger.kernel.org>,
containers@lists.linux-foundation.org,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
linux-api@vger.kernel.org, David Miller <davem@davemloft.net>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Stephen Hemminger <stephen@networkplumber.org>,
Andrew Morton <akpm@linux-foundation.org>,
Andy Lutomirski <luto@amacapital.net>
Subject: Re: [RFC PATCH net-next v2 0/5] netns: allow to identify peer netns
Date: Fri, 26 Sep 2014 13:15:10 -0600 [thread overview]
Message-ID: <5425BB3E.10700@gmail.com> (raw)
In-Reply-To: <54256CCB.4000709@6wind.com>
On 9/26/14, 7:40 AM, Nicolas Dichtel wrote:
>>
>>
>> No, I don't want to monitor anything. Even if I wanted, I would just
>> start one
>> daemon in each netns instead of one for all.
> Ok you don't want, but some other people (not only me) want it! And
> having one
> daemon per netns does not scale: there are scenarii with thousand netns
> which
> are dynamically created and deleted.
An example of the scaling problem using quagga (old but still seems to
be a relevant data point):
https://lists.quagga.net/pipermail/quagga-users/2010-February/011351.html
"2k VRFs that would be 2.6G"
And that does not include the overhead of each namespace -- roughly
200kB/namespace on one kernel I checked (v3.10). So that's a ballpark of
3G of memory.
David
next prev parent reply other threads:[~2014-09-26 19:15 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-23 13:20 [RFC PATCH net-next v2 0/5] netns: allow to identify peer netns Nicolas Dichtel
2014-09-23 13:20 ` [RFC PATCH net-next v2 1/5] netns: allocate netns ids Nicolas Dichtel
2014-09-23 13:20 ` [RFC PATCH net-next v2 2/5] netns: add genl cmd to get the id of a netns Nicolas Dichtel
2014-09-23 13:20 ` [RFC PATCH net-next v2 3/5] rtnl: add link netns id to interface messages Nicolas Dichtel
2014-09-23 13:20 ` [RFC PATCH net-next v2 4/5] iptunnels: advertise link netns via netlink Nicolas Dichtel
2014-09-23 13:20 ` [RFC PATCH net-next v2 5/5] rtnl: allow to create device with IFLA_LINK_NETNSID set Nicolas Dichtel
2014-09-23 19:22 ` [RFC PATCH net-next v2 0/5] netns: allow to identify peer netns Cong Wang
2014-09-24 9:23 ` Nicolas Dichtel
2014-09-24 16:01 ` Cong Wang
2014-09-24 16:15 ` Cong Wang
2014-09-24 16:31 ` Nicolas Dichtel
2014-09-24 16:48 ` Cong Wang
2014-09-25 8:53 ` Nicolas Dichtel
2014-09-26 1:58 ` Cong Wang
2014-09-26 13:38 ` Nicolas Dichtel
2014-09-24 16:27 ` Nicolas Dichtel
2014-09-24 16:45 ` Cong Wang
2014-09-25 8:53 ` Nicolas Dichtel
2014-09-26 2:09 ` Cong Wang
2014-09-26 13:40 ` Nicolas Dichtel
2014-09-26 19:15 ` David Ahern [this message]
2014-09-26 19:34 ` Eric W. Biederman
2014-09-26 19:44 ` David Ahern
2014-09-26 20:45 ` Eric W. Biederman
2014-09-26 20:56 ` David Ahern
2014-09-23 19:26 ` Andy Lutomirski
2014-09-24 9:31 ` Nicolas Dichtel
2014-09-24 17:05 ` Andy Lutomirski
2014-09-25 7:54 ` Nicolas Dichtel
2014-09-26 18:10 ` Eric W. Biederman
2014-09-26 18:26 ` Andy Lutomirski
2014-09-26 18:57 ` Eric W. Biederman
2014-09-29 12:06 ` Nicolas Dichtel
2014-09-29 18:43 ` Eric W. Biederman
2014-10-02 13:46 ` Nicolas Dichtel
2014-10-02 13:48 ` [RFC PATCH net-next v3 0/4] " Nicolas Dichtel
2014-10-02 13:48 ` [RFC PATCH net-next v3 1/4] netns: add genl cmd to add and get peer netns ids Nicolas Dichtel
2014-10-02 19:33 ` Eric W. Biederman
2014-10-03 12:22 ` Nicolas Dichtel
2014-10-02 13:48 ` [RFC PATCH net-next v3 2/4] rtnl: add link netns id to interface messages Nicolas Dichtel
2014-10-02 13:48 ` [RFC PATCH net-next v3 3/4] iptunnels: advertise link netns via netlink Nicolas Dichtel
2014-10-02 13:48 ` [RFC PATCH net-next v3 4/4] rtnl: allow to create device with IFLA_LINK_NETNSID set Nicolas Dichtel
2014-10-30 15:25 ` [PATCH net-next v4 0/4] netns: allow to identify peer netns Nicolas Dichtel
2014-10-30 15:25 ` [PATCH net-next v4 1/4] netns: add genl cmd to add and get peer netns ids Nicolas Dichtel
2014-10-30 18:35 ` Eric W. Biederman
2014-10-31 9:41 ` Nicolas Dichtel
2014-10-30 15:25 ` [PATCH net-next v4 2/4] rtnl: add link netns id to interface messages Nicolas Dichtel
2014-10-30 15:25 ` [PATCH net-next v4 3/4] iptunnels: advertise link netns via netlink Nicolas Dichtel
2014-10-30 15:25 ` [PATCH net-next v4 4/4] rtnl: allow to create device with IFLA_LINK_NETNSID set Nicolas Dichtel
2014-10-30 18:41 ` [PATCH net-next v4 0/4] netns: allow to identify peer netns Eric W. Biederman
2014-10-31 9:48 ` Nicolas Dichtel
2014-10-31 19:14 ` Eric W. Biederman
2014-11-05 14:23 ` Nicolas Dichtel
2014-12-04 16:21 ` Nicolas Dichtel
2015-01-15 14:11 ` [PATCH net-next v5 " Nicolas Dichtel
2015-01-15 14:11 ` [PATCH net-next v5 1/4] netns: add rtnl cmd to add and get peer netns ids Nicolas Dichtel
2015-01-15 14:11 ` [PATCH net-next v5 2/4] rtnl: add link netns id to interface messages Nicolas Dichtel
2015-01-15 14:11 ` [PATCH net-next v5 3/4] tunnels: advertise link netns via netlink Nicolas Dichtel
2015-01-15 14:11 ` [PATCH net-next v5 4/4] rtnl: allow to create device with IFLA_LINK_NETNSID set Nicolas Dichtel
2015-01-19 19:16 ` [PATCH net-next v5 0/4] netns: allow to identify peer netns David Miller
2014-11-01 21:08 ` [PATCH net-next v4 " David Miller
2014-11-24 13:45 ` Nicolas Dichtel
2014-10-02 19:20 ` [RFC PATCH net-next v2 0/5] " Eric W. Biederman
2014-10-02 19:31 ` Andy Lutomirski
2014-10-02 19:45 ` Eric W. Biederman
2014-10-02 19:48 ` Andy Lutomirski
2014-10-03 12:22 ` Nicolas Dichtel
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