[Lustre-discuss] Fast error reporting

[Dilger, Andreas]

This is (or at least was) possible for OSTs if you enable "failout" mode, instead of the default "failover" mode. I don't know if we have tested this in a long time, since it isn't something that most people want. 

However, it isn't currently possible to run the MDT in failout mode since there isn't much that can be done with a filesystem without the MDT, unless the application is continually writing to the same large file. 

Cheers, Andreas

> On Mar 6, 2014, at 1:36, "邓尧" <torshie at gmail.com> wrote:
> 
> I did a test which is simply umount the MDT and check the behaviour of the clients. During the test all clients are  blocked until a few seconds after re-mounting the MDT is re-mounted.
> We want the system to respond fast, reporting an error is acceptable, but blocking for 10 seconds isn't. Whenever a server node, a block device or a network connection fails, could lustre just report an error instead of try to recover ?
> 
> Thanks
> Yao
> 
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