Yes, I planned to do the same thing I did for the old client:
https://github.com/xrootd/xrootd/blob/master/src/XrdClient/XrdClientSock.cc#L457
Cheers,
Lukasz
On 08/28/2014 03:12 PM, Brian Bockelman wrote:
> If you're going to enable keepalive in the client -
>
> You might want to think about manually tuning the keepalive timeouts down from the defaults (2 hours). I recently adjusted it down to around 5 minutes in HTCondor because 2 hours was "too late" to detect the disconnect to recover the jobs.
>
> There's a socket option to do this in Linux (which travels under a different name in Mac OS X... not sure about Solaris). Again, we've not seen any kernel scalability issues from doing this.
>
> Brian
>
> On Aug 28, 2014, at 5:09 AM, Lukasz Janyst <[log in to unmask]> wrote:
>
>> Hi Brian,
>>
>> for the server-side, it is Andy's call.
>>
>> We have seen silent disconnection problems with ALICE sites in the past, this is why I set up the keepalive functionality for sockets in the old client. I will do the same for the new one as well.
>>
>> Chers,
>> Lukasz
>>
>> On 08/25/2014 02:52 PM, Brian Bockelman wrote:
>>> Hi Lukasz, all,
>>>
>>> Can we enable keepalive by default? I don't look forward to the task of asking every site for a configuration change.
>>>
>>> At least on the linux platform, we have observed the kernel is able to handle tens-of-thousands of sockets with keepalive enabled; it doesn't appear to be a scalability issue. There doesn't appear to be any protocol built-in features we could use on the server side (although this doesn't appear to be needed on the client side).
>>>
>>> Brian
>>>
>>> On Aug 25, 2014, at 2:08 AM, Lukasz Janyst <[log in to unmask]> wrote:
>>>
>>>> On 08/22/2014 06:59 PM, Matevz Tadel wrote:
>>>>>> Does the Xrootd server at least enable TCP keepalive? That'll close
>>>>>> out dead connections after 2 hours.
>>>>>
>>>>> I don't think so ... I see things hanging up to 24 hours easily (when
>>>>> collector decides to give up on the session). Can this timeout be set at
>>>>> socket creation time?
>>>>
>>>> Typically, this is handled by the TCP stack, but the routers/firewalls on the way often mess things up. To enable the OS keepalive for xrootd sockets you need to ask for it: http://xrootd.org/doc/prod/xrd_config.htm#_Toc310725344
>>>>
>>>> Cheers,
>>>> Lukasz
>>>>
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