[Gluster-devel] [RFC] What if client fuse process crash?

[Changwei Ge]

Hi Ravishankar,


Thanks for your share, it's very useful to me.

I am setting up a glusterfs storage cluster recently and the 
umount/mount recovering process bothered me.


I happened to find some patches[1] from internet aiming to address such 
a problem but no idea why they were not managed to merge into glusterfs 
mainline.

Do you know why?


Thanks,

Changwei


[1]:

https://review.gluster.org/#/c/glusterfs/+/16843/

https://github.com/gluster/glusterfs/issues/242


On 2019/8/6 1:12 下午, Ravishankar N wrote:
> On 05/08/19 3:31 PM, Changwei Ge wrote:
>> Hi list,
>>
>> If somehow, glusterfs client fuse process dies. All subsequent file 
>> operations will be failed with error 'no connection'.
>>
>> I am curious if the only way to recover is umount and mount again?
> Yes, this is pretty much the case with all fuse based file systems. 
> You can use -o auto_unmount (https://review.gluster.org/#/c/17230/) to 
> automatically cleanup and not having to manually unmount.
>>
>> If so, that means all processes working on top of glusterfs have to 
>> close files, which sometimes is hard to be acceptable.
>
> There is 
> https://research.cs.wisc.edu/wind/Publications/refuse-eurosys11.html, 
> which claims to provide a framework for transparent failovers.  I 
> can't find any publicly available code though.
>
> Regards,
> Ravi
>>
>>
>> Thanks,
>>
>> Changwei
>>
>>
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