Tape or Disk for Grlacier?
"This is due to the Glacier racks not having enough power provisioned to them to spin up more than about 1/5 of the drives in any given rack"
You sure about that? Reference please!
"Contrary to previous ideas that Amazon's Glacier cloud archival storage uses disk-based object storage, the latest word is that it is based on LTO6 tape. This comes from a nameless but senior person in the IT industry who "cannot talk about it". El Reg has also heard the same from another source in the general IT industry.
This idea of tape being the Glacier store fits in with the longish retrieval time for Amazon Glacier data and the cheap-as-chips cost structure Glacier has."
the latest word from a reliable source reveals that it uses LTO6. This was leaked out by a reliable senior source of Amazon, at the recently held IP Expo.
SpectraLogic is going from strength to strength. It has just been confirmed by a third person "familiar with the situation" that Amazon's Glacier archive service uses SpectraLogic tape libraries, thus enabling its low cost.
Which makes sense. Architecturally, I think they made the right choice with other LTO Gens coming online. I suspect Amazon will punish soon by reducing Glacier's already cheap costs. Using tape as a back-end , they have a lot more headroom to reduce as tape is quite a bit cheaper versus hard drives.
But the problem in general - long term archiving - demands the lowest cost. Retrieval time? Meh. We'll see how EVault does if they stay ~50% more costly than Amazon.