http://metaarchive.org/costs in our case. Interested to hear other
experiences. Al


On 1/11/13 10:01 AM, "Joshua Welker" <[log in to unmask]> wrote:

>Thanks, Al. I think we'd join a LOCKSS network rather than run multiple
>LOCKSS boxes ourselves. Does anyone have any experience with one of
>those, like the LOCKSS Global Alliance?
>
>Josh Welker
>
>
>-----Original Message-----
>From: Code for Libraries [mailto:[log in to unmask]] On Behalf Of
>Al Matthews
>Sent: Friday, January 11, 2013 8:50 AM
>To: [log in to unmask]
>Subject: Re: [CODE4LIB] Digital collection backups
>
>We use LOCKSS as part of MetaArchive. LOCKSS as I understand it is
>typically spec-d for consumer hardware, and so, presumably as a result of
>SE Asia flooding, there have been some drive failures and cache downtimes
>and adjustments accordingly.
>
>However, that is the worst of it, first.
>
>LOCKSS is to some perhaps even considerable degree, tamper-resistant
>since it relies on mechanisms of collective polling among multiple copies
>to preserve integrity. This, as opposed to static checksums or some other
>solution.
>
>As such, it seems to me important to run a LOCKSS box with other LOCKSS
>boxes; MA cooperative specifies six or so, distributed locations for each
>cache.
>
>The economic sustainability of such an enterprise is a valid question.
>David S H Rosenthal at Stanford seems to lead the charge for this
>research.
>
>e.g.
>http://blog.dshr.org/2012/08/amazons-announcement-of-glacier.html#more
>
>I've heard mention from other players that they watch MA carefully for
>such sustainability considerations, especially because MA uses LOCKSS for
>non-journal content. In some sense this may extend LOCKSS beyond its
>original design.
>
>MetaArchive has in my opinion been extremely responsible in designating
>succession scenarios and disaster recovery scenarios, going to far as to
>fund, develop and test services for migration out of the system, into an
>IRODS repository in the initial case.
>
>
>Al Matthews
>AUC Robert W. Woodruff Library
>
>On 1/11/13 9:10 AM, "Joshua Welker" <[log in to unmask]> wrote:
>
>>Good point. But since campus IT will be creating regular
>>disaster-recovery backups, the odds that we'd need ever need to
>>retrieve more than a handful of files from Glacier at a time is pretty
>>low.
>>
>>Josh Welker
>>
>>
>>-----Original Message-----
>>From: Code for Libraries [mailto:[log in to unmask]] On Behalf Of
>>Gary McGath
>>Sent: Friday, January 11, 2013 8:03 AM
>>To: [log in to unmask]
>>Subject: Re: [CODE4LIB] Digital collection backups
>>
>>Concerns have been raised about how expensive Glacier gets if you need
>>to recover a lot of files in a short time period.
>>
>>http://www.wired.com/wiredenterprise/2012/08/glacier/
>>
>>On 1/10/13 5:56 PM, Roy Tennant wrote:
>>> I'd also take a look at Amazon Glacier. Recently I parked about 50GB
>>> of data files in logical tar'd and gzip'd chunks and it's costing my
>>> employer less than 50 cents/month. Glacier, however, is best for
>>> "park it and forget" kinds of needs, as the real cost is in data flow.
>>> Storage is cheap, but must be considered "offline" or "near line" as
>>> you must first request to retrieve a file, wait for about a day, and
>>> then retrieve the file. And you're charged more for the download
>>> throughput than just about anything.
>>>
>>> I'm using a Unix client to handle all of the heavy lifting of
>>> uploading and downloading, as Glacier is meant to be used via an API
>>> rather than a web client.[1] If anyone is interested, I have local
>>> documentation on usage that I could probably genericize. And yes, I
>>> did round-trip a file to make sure it functioned as advertised.
>>> Roy
>>>
>>> [1] https://github.com/vsespb/mt-aws-glacier
>>>
>>> On Thu, Jan 10, 2013 at 2:29 PM,  <[log in to unmask]>
>>>wrote:
>>>> We built our own solution for this by creating a plugin that works
>>>>with our digital asset management system (ResourceSpace) to
>>>>invidually back up files to Amazon S3. Because S3 is replicated to
>>>>multiple data centers, this provides a fairly high level of
>>>>redundancy. And because it's an object-based web service, we can
>>>>access any given object individually by using a URL related to the
>>>>original storage URL within our system.
>>>>
>>>> This also allows us to take advantage of S3 for images on our website.
>>>>All of the images from in our online collections database are being
>>>>served straight from S3, which diverts the load from our public web
>>>>server. When we launch zoomable images later this year, all of the
>>>>tiles will also be generated locally in the DAM and then served to
>>>>the public via the mirrored copy in S3.
>>>>
>>>> The current pricing is around $0.08/GB/month for 1-50 TB, which I
>>>>think is fairly reasonable for what we're getting. They just dropped
>>>>the price substantially a few months ago.
>>>>
>>>> DuraCloud http://www.duracloud.org/ supposedly offers a way to add
>>>>another abstraction layer so you can build something like this that
>>>>is portable between different cloud storage providers. But I haven't
>>>>really looked into this as of yet.
>>
>>
>>--
>>Gary McGath, Professional Software Developer http://www.garymcgath.com
>
>
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