Messages in this thread | | | Date | Fri, 16 Nov 2007 20:34:32 +0100 | From | Jörn Engel <> | Subject | Re: Treat disk space like memory space |
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On Fri, 16 November 2007 10:30:12 -0800, H. Peter Anvin wrote: > > This, by the way, has been discussed on and off -- often in the context > of undelete (which is an identical problem.) The problem usually is > that performance of real storage users suffer because of locality > issues. However, flash storage doesn't have locality requirements...
It does, although significantly less so than disks. Read latency is typically between 100x and 1000x less than disk latency.
Another argument against this is that free space directly translates to speed, both for disks and flash. Disk filesystems fragment like hell if the disk is constanly near-full and flash filesystems require a lot more garbage collection overhead.
Jörn
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