Re:FreeBSD on the raspberry pi
by hengheng on Sunday January 03, 2016 @08:52AM
(#10830577)
I've always been wondering if file system RAM caches couldn't be moved to a fast SSD nowadays. Do you think this would be possible with, say, an Intel 750?
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ZFS (and probably others) let you do that, kinda: it always has a primary in-memory cache but you can add level 2 cache devices (L2ARC) to the pool. In fact you can extend two different caches to storage devices: L2ARC is a read cache, and you can add a separate set of Log Devices used by the ZFS Intent Log, where writes are cached.