[Gluster-users] Problem With AFR

[Chad]

I don't disagree that other network file systems may have issues.
It does not change that fact that while 5 seconds may be "remarkable" it does not make it any more acceptable when my services die and my clients complain.
The point of high availability is that any single point of failure does not take down your services.

^C



Keith Freedman wrote:
> At 08:13 AM 3/6/2010, Chad wrote:
>> I second this question/request.
>> When the 1st server goes down, how do we eliminate the hang time? 5 
>> seconds is a long time for a file system to be hung.
> 
> it is a long time, but if you think about other HA filesystems, this is 
> one of the shortest I've seen.
> 
> hardware NAS devices, when there's a node failure, will often take 30 
> seconds to 2 minutes to fully recover.  In light of the alternatives, 5 
> seconds is remarkable.
> 
> if you're getting these delays on a regular basis then something is 
> wrong, but if it's something that just happens in the face of a failure, 
> then it should be relatively rare.
> if it happens all the time, then you really need to figure out why your 
> systems are failing and resolve that problem.
> 
> Just my .02
> 
>> ^C
>>
>>
>>
>> Richard de Vries wrote:
>>> Hello Eduardo,
>>> We had the same problem over here, with two nodes that are both server
>>> and client.
>>> You can try to lower the ping-timeout in the client volume file:
>>> option ping-timeout 5
>>> 5 seconds is the sadly the lowest possible ping-timeout, our
>>> applications on the main node can hang for about 5 seconds in case the
>>> standby node fails (although we have a dedicated interconnect).
>>> Maybe the gluster developers have a better solution to this.
>>> Regards,
>>> Richard
>>>
>>>> Hi i´m using GlusterFs V3.0.2 in Fedora 12.
>>>>
>>>> I have configure AFR with 3 nodes and mount the volume in the 
>>>> client, its
>>>> work fine, but when a node fail, the file system in the client locks 
>>>> and I
>>>> can´t execute any operations for about 40 to 50 Seconds.
>>>
>>>> After 40 to 50 Seconds the File system on the client start to work 
>>>> again.
>>>> How I can resolve this problem, because the file system can´t bee
>>>> inaccessible for so long Time.
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