[Pacemaker] SFEX resource agent

[Xinwei Hu]

Here's the attachment... Sorry for push the "sending" button too early.

2009/2/24 Xinwei Hu <hxinwei at gmail.com>:
> Hi Priyanka,
>
> 2009/2/22 Priyanka Ranjan <priyanka3rdfeb at gmail.com>:
>>> It is close to impossible to protect against malicious applications from
>>> other cluster nodes. sfex, LVM exclusive activation, and SCSI2/SCSI3
>>> reservations likewise can be broken - they must be able to be broken, or
>>> else the cluster could never orchestrate a fail-over.
>>
>> I understand your point but if we have SCSI3 protection other node will have
>> to perform few extra steps before accessing the disk. it will have to remove
>> to the present key, put it's new registration key , then put it's own
>> reservation then only it can go ahead and access the disk. this way SCSI3
>> provide extra security unlike sfex or LVM.
>
> sfex actually depends on the contraints from pacemaker to ensure the
> data integrity,
> and LVM doesn't secure data integrity until clustered locking is enabled.
>
>> can we configure present scsi2reservation R.A  to use sg_persist command .
>
> Implement exclusive control RA like scsi2reservation in sg_persist
> needs extra works.
> I attached my RA of scsi-3 reservation.
>
> It'll be great if you can test it and give some feedback based on it.
>
> Thanks.
>> Thanks & Regards,
>> Priyanka.
>>>
>>>
>>> Regards,
>>>    Lars
>>>
>>> --
>>> Teamlead Kernel, SuSE Labs, Research and Development
>>> SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nürnberg)
>>> "Experience is the name everyone gives to their mistakes." -- Oscar Wilde
>>>
>>>
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>>
>>
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>>
>
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