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<p class="MsoNormal">Our charging model for disk storage assumes that a percentage of it is really HSM’d, though in practise we aren’t heavily doing this.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My (personal) view on tape really is that anything on tape is FoC, that way people can play games to recall/keep it hot it if they want, but it eats their FoC or paid disk allocations, whereas if they leave it on tape, they benefit in having
more total capacity.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We currently use the pre-migrate/SOBAR for our DR piece, so we’d already be pre-migrating to tape anyway, so it doesn’t really cost us anything extra to give FoC HSM’d storage. So my suggestion is pitch HSM (or even TCT maybe … if only
we could do both) as your DR proposal, and then you can give it to users for free
<span style="font-family:"Apple Color Emoji"">😊</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Simon<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black"><gpfsug-discuss-bounces@spectrumscale.org> on behalf of "Sobey, Richard A" <r.sobey@imperial.ac.uk><br>
<b>Reply-To: </b>"gpfsug-discuss@spectrumscale.org" <gpfsug-discuss@spectrumscale.org><br>
<b>Date: </b>Thursday, 3 May 2018 at 16:03<br>
<b>To: </b>"gpfsug-discuss@spectrumscale.org" <gpfsug-discuss@spectrumscale.org><br>
<b>Subject: </b>Re: [gpfsug-discuss] Recharging where HSM is used<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><a name="_MailOriginalBody">Stephen, Bryan,<o:p></o:p></a></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody">Thanks for the input, it’s greatly appreciated.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody">For us we’re trying – as many people are – to drive down the usage of under-the-desk NAS appliances and USB HDDs. We offer space on disk, but you can’t charge for 3TB of storage the same as you
would down PC World and many customers don’t understand the difference between what we do, and what a USB disk offers.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody">So, offering tape as a medium to store cold data, but not archive data, is one offering we’re just getting round to discussing. The solution is in place. To answer the specific question: for
our customers that adopt HSM, how much less should/could/can we charge them per TB. We know how much a tape costs, but we don’t necessarily have the means (or knowledge?) to say that for a given fileset, 80% of the data is on tape. Then you get into 80% of
1TB is not the same as 80% of 10TB.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody">Richard<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><b><span lang="EN-US">From:</span></b></span><span style="mso-bookmark:_MailOriginalBody"><span lang="EN-US"> gpfsug-discuss-bounces@spectrumscale.org <gpfsug-discuss-bounces@spectrumscale.org>
<b>On Behalf Of </b>Stephen Ulmer<br>
<b>Sent:</b> 03 May 2018 14:03<br>
<b>To:</b> gpfsug main discussion list <gpfsug-discuss@spectrumscale.org><br>
<b>Subject:</b> Re: [gpfsug-discuss] Recharging where HSM is used</span><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody">I work for a partner, but I occasionally have to help customers work on cost justification that includes charge-back (or I encourage them to do show-back to alleviate some political concerns).<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody">I’d also like to see what people are doing around this.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody">If I may ask a question, what is the goal for your site? Are you trying to figure out how to charge for the tape space, or to NOT charge the migrated files as resident? Would you (need to) charge
for pre-migrated files twice? Are you trying to figure out how to have users pay for recalls? Basically, what costs are you trying to cover? I realize that was not “a” question… :)<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody">Also, do you specifically mean TSM HSM, or do you mean GPFS policies and an external storage pool?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="mso-bookmark:_MailOriginalBody"><span style="color:black">-- <br>
Stephen<br>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody">On May 3, 2018, at 5:43 AM, Sobey, Richard A <</span><a href="mailto:r.sobey@imperial.ac.uk"><span style="mso-bookmark:_MailOriginalBody">r.sobey@imperial.ac.uk</span><span style="mso-bookmark:_MailOriginalBody"></span></a><span style="mso-bookmark:_MailOriginalBody">>
wrote:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody">Hi all,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody">I’d be interested to talk to anyone that is using HSM to move data to tape, (and stubbing the file(s)) specifically any strategies you’ve employed to figure out how to charge your customers (where
you do charge anyway) based on usage.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody">On-list or off is fine with me.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody">Thanks<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody">Richard<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:9.0pt;font-family:Helvetica">_______________________________________________<br>
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</span></span><a href="http://gpfsug.org/mailman/listinfo/gpfsug-discuss"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:9.0pt;font-family:Helvetica;color:#954F72">http://gpfsug.org/mailman/listinfo/gpfsug-discuss</span></span><span style="mso-bookmark:_MailOriginalBody"></span></a><span style="mso-bookmark:_MailOriginalBody"><o:p></o:p></span></p>
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