[Info-vax] Databases versus RMS

Paul Sture paul at sture.ch
Fri Apr 20 05:45:54 EDT 2012


On Fri, 20 Apr 2012 08:18:01 +0200, Jan-Erik Soderholm wrote:

> The DECs SSD in SSB's (StorageWorks disks) was RAM based as far as I
> know. That is, did not retain data at power loss. Was often used as one
> part of a schadow-set so that all reads was doen from the RAM disks and
> all writes went to both (and thus stored permanently).

Yes, I used the term RAM disk earlier in the thread to indicate one that 
lost memory contents with power loss.

> Modern SSD (Solid State Disks) are more or less always Flash-based and
> thus retain data at a power loss. Many uses a Flash SSD as their only
> disks in theirs laptop replacing the original rotating hard disk.

That is certainly what I see a lot of development folks doing at the 
moment.



-- 
Paul Sture



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