[olug] SSD write durability in production use

[Dan Anderson]

Look at the options from Texas Memory.

RAM->Flash should go pretty fast and give you a good backup (mitigating the
battery life issue).

I don't know anything about the gigabyte card or the WOW card you mention,
but if you can afford it you can get something that backs up to
flash (10,000+ backups) when the main power drops.

In this case you use your battery life just to write your backup to flash so
having 16 or 72 hours is overkill.

Dan

On Wed, Oct 15, 2008 at 7:45 PM, Will Langford <unfies at gmail.com> wrote:

> On Wed, Oct 15, 2008 at 8:51 AM, Dan Anderson <dan-anderson at cox.net>
> wrote:
>
> > There are various types of SSD - have you considered SDRAM (DDR) SSD or
> the
> > newer hybrid ones?
> >
> > IMO, they would be more appropriate for a production DB type application
> > then the low-end flash products (good, fast, cheap - pick 2).
> >
> > Dan
> >
>
> The concern for memory based SSD's (the gigabyte card was first looked at
> due to all the press) would be retention time in the event of an unforeseen
> permanent power failure.
>
> 16 hours on the gigabyte card isn't too bad, I suppose, but if we can reach
> 72 hrs, we'd be much more comfortable.  We did debate possibly hacking
> together a better battery for the gigabyte.... :).  But we never did pick
> up
> a gigabyte, etc etc etc.  For scheduled power offs and similar, sure -- a
> copy from the RAM device to a traditional disk would work just fine.. but
> that's scheduled!
>
> I believe... there's been recent showings of the multi-sandboxed WOW card
> thing.... while it's not targeted to gamers, it's got an enthusiast price
> tag and undoubtedly appropriate server related performance.  But I think
> that card is also flash/slc based.
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