I would like to refresh my questions from may 4th.
Can it be the case that the venti index file exhibits a desastrous write
pattern for SSDs?
I presume that each new block written to venti causes a random block to be
rewritten in the index file, until the bucket is full (after 215 writes).
Gi
Back of the napkin:
venti(8) has an index entry as 40 bytes. That would fill a 1MB erasure
block in 25k writes. A SLC should handle at least twice that. A MLC is
probably less than half that from what I understand. But we haven't
discussed wear levelling yet. With the index recommended to be 5% of
> Can it be the case that the venti index file exhibits a desastrous
> write pattern for SSDs?
Maybe... but it would need to be worse than the load provided by
other file systems, including FAT and ext2/3/4. Some of those
file systems rewrite some blocks like mad (e.g., superblock, journal
blocks
