by Robin Harris | Monday, June 27, 2011 | Architecture, SSD/Flash/NVRAM |
A post last month in ACM’s Queue raised a disturbing point around block-level deduplication in flash SSDs: it could hose your file system. De-dup is a Good Thing, right? Researchers found that at least 1 Sandforce SSD controller – the SF1200 – does...
by Robin Harris | Monday, June 20, 2011 | Architecture, SSD/Flash/NVRAM |
IT pros are always skeptical about new technology. Is it surprising that flash SSD’s are getting the gimlet eye? The big worry seems to be endurance. Nobody wants to buy an expensive SSD and have it fail after a year on the job. But IT infrastructures are...
by Robin Harris | Tuesday, June 7, 2011 | Architecture, SOHO/SMB, SSD/Flash/NVRAM |
I was surprised by the number of questions at last week’s webinar – many more than we could get to – so I’m answering a few here. Performance Q: Can Robin talk about performance and how does flash help solve I/O bottleneck? NAND flash is very...
by Robin Harris | Tuesday, May 17, 2011 | Architecture, SOHO/SMB, SSD/Flash/NVRAM |
JIm Gray’s comment that disk is the new tape is truer today than it was 8 years ago. We’ve been adding caches, striping disks, modifying applications and performing other unnatural acts to both reduce and accommodate random reads and writes to disk. Flash...
by Robin Harris | Tuesday, May 3, 2011 | Architecture, Backup, Enterprise, SOHO/SMB, SSD/Flash/NVRAM |
Forget the flame wars over moving window versus fixed block de-duplication. A recent paper, A Study of Practical Deduplication (pdf) from William J. Bolosky of Microsoft Research and Dutch T. Meyer of the University of British Columbia found that whole file...
by Robin Harris | Friday, April 29, 2011 | Architecture, Cloud computing & storage, Clusters |
Amazon’s outage was caused by a failure of the underlying storage – the Elastic Block Storage. Here’s what they learned. EBS The Elastic Block Store (EBS) is a distributed and replicated storage optimized for consistent and low latency I/O from EC2...
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