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From Lv Haijiao <luhaij...@gmail.com>
Subject Re: Live migration causing VM's file system read-only
Date Thu, 19 May 2016 08:37:19 GMT
The issue seems gone while we migrate a SSD+HDD mixed storage which has
much better I/O performance than previous NFS one.

Thanks Dag,  your advice is helpful.

2016-05-05 21:55 GMT+08:00 Lv Haijiao <luhaijiao@gmail.com>:

> Hi, Dag
>
> Thanks for your hint !
>
> We don't have chance to reproduce this on our production platform,  but we
> notice most of these VMs hitting this issue are DB server.
>
> Even that, live migration is supposed to consume less bandwidth as
> majority of VM data is still on the shared storage, need no replication,
> except the data in memory.
>
> Is it right ? :-)
>
> 2016-05-05 18:04 GMT+08:00 Lv Haijiao <luhaijiao@gmail.com>:
>
>> Hi,
>>
>> Here's our environment,
>>
>>
>>    - ACS 4.7.1
>>    - Ubuntu 14.04 KVM
>>    - NFS as shared, primary storage
>>
>>
>> While we do a couple of VMs live migration in sequence from physical
>> server A to B,  the file system of some VMs goes into 'ready only' status
>> unless we reboot the VM again.
>>
>> No clue why we only hit this issue on some of VMs.
>>
>> Any advice or experience sharing is most appreciated !
>>
>
>

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