[Users] which file system for shared disk?

[Shu Ming]

2013-7-11 1:43, Itamar Heim:
> On 07/10/2013 05:33 PM, Piotr Szubiakowski wrote:
>> The way that oVirt manage storage domains accessed via FC is very smart.
>> There is separate logical volume for each virtual disk. But I think that
>> logical volume at the same time could be "touched" only by one host. Is
>> it possible that two host access read/write the same logical volume and
>> there is no data corruption?
>
> hence a shared disk over block storage using LVM must be 
> pre-allocated, so no LV changes (lv extend) would be needed.
By using "pre-allocated" here, even for qcow on KVM? If it is 
pre-allocated, there is no benefit to use qcow.

> (also, it cannot have snapshots, since it would become qcow)
Why it can not have snapshots? I think qcow on the block device can also 
have snapshots.

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-- 
---
舒明 Shu Ming
Open Virtualization Engineerning; CSTL, IBM Corp.
Tel: 86-10-82451626  Tieline: 9051626 E-mail: shuming at cn.ibm.com or shuming at linux.vnet.ibm.com
Address: 3/F Ring Building, ZhongGuanCun Software Park, Haidian District, Beijing 100193, PRC