[CentOS] HSM

Wed Jan 11 11:29:11 UTC 2017
J Martin Rushton <martinrushton56 at btinternet.com>

Interesting - the ARC seems to do just that at first glance.  I may have
a look at it this evening.

On 11/01/17 11:05, Andrew Holway wrote:
> ZFS also does some fun things here if you want to build an SSD & spinning
> disk array - http://zfsonlinux.org/
> 
> 
> On 11 January 2017 at 11:56, J Martin Rushton <
> martinrushton56 at btinternet.com> wrote:
> 
>> Hmm, don't you just love changing terminology!  I've been using HSM
>> systems at work since '99.  BTW, DMAPI is the Data Management API which
>> was a common(ish) extension used by amongst others SGI and IBM.
>>
>> Back to lvmcache.  It looks interesting.  I'd earlier dismissed LVM
>> since it is block orientated, not file orientated.  Probably because my
>> mental image is of files migrating to tapes in a silo.
>>
>> On 11/01/17 10:23, Andrew Holway wrote:
>>> HSM also stands for "Hardware security module"
>>>
>>> Maybe lvmcache would be interesting for you? HSM is more popularly known
>> as
>>> "tiering".
>>>
>>> Cheers,
>>>
>>> Andrew
>>>
>>> On 11 January 2017 at 11:15, J Martin Rushton <
>>> martinrushton56 at btinternet.com> wrote:
>>>
>>>> I think there may be some confusion here.  By HSM I was referring to
>>>> Hierarchical Storage Management, whereby there are multiple levels of
>>>> storage (fast+expensive <-> slow+cheap) and files migrate up or down.
>>>> Originally it was used to keep data on tape with the metadata residing
>>>> on disk though it has been expanded to allow a SAS/SATA hierarchy. Quite
>>>> where PKI comes in I'm not sure, unless you are implementing it over an
>>>> external network.
>>>>
>>>> On 11/01/17 10:06, Andrew Holway wrote:
>>>>> Dogtag? http://pki.fedoraproject.org/wiki/PKI_Main_Page
>>>>>
>>>>> On 11 January 2017 at 10:30, J Martin Rushton <
>>>>> martinrushton56 at btinternet.com> wrote:
>>>>>
>>>>>> Purely from interest, is there any current FOSS implementation of HSM?
>>>>>> I note that XFS has dropped support for DMAPI, have other filesystems?
>>>>>>
>>>>>> Regards,
>>>>>> Martin
>>>>>>
>>>>>>
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