4 ms·
Currently, SSDs' limited number of rewrite cycles make them unsuitable for that type of server application.
by Encosia 18y ago
Currently, SSDs' limited number of rewrite cycles make them unsuitable for that type of server application.
- wmf 18y agoThat's a myth. Enterprise flash drives are rated for years of constant writes.
- Encosia 18y agoThe problem with those ratings is that you're only exposed to one side of the potential deviation from the mean. A MTBF without standard deviation is meaningless. To put those ratings in context, consider that a Western Digital VelociRaptor has a 160 year MTBF.
- wmf 18y agoThe good news is that the wearout of an SSD is a gradual, measurable, monotonic process (because at every point you know how many spare blocks are left), while the failure of a hard disk is a random process.
- Encosia 18y agoTrue, that's a very good point.
- sketerpot 18y agoI had another hard drive fail on me last week. At this point I would give part of my soul for SSD-style failure properties with sizes and prices comparable to conventional hard drives. (I mean, assuming partial souls regenerate, Xanth-style.) I'm sure it will happen in a few years. I wonder if there's some starup opportunity here: are there any ways to take advantage of fast, reliable, cheap, flash-like storage becoming ubiquitous? Probably you could add more fine-grained extension hooks to programs without them becoming bloated, by having plugins loaded lazily at run-time from a solid state drive. I'm convinced that the next big thing will be software that quietly integrates with other software, so you don't even have to click on an icon to use it.
- timtrueman 18y agoDepends on the SSD; SLC-based Fusion-io cards are rated for 24-48 years at 5TB write-erase per day (source: http://www.fusionio.com/PDFs/Fusion%20Specsheet.pdf http://www.fusionio.com/PDFs/Fusion%20Specsheet.pdf)