We have groups generating terabytes a day of image data from lab instruments
and saving them to an X4500.
We have tried lzbj : compressratio = 1.13 in 11 hours , 1.3 TB -> 1.1 TB
gzip -9 : compress ratio = 1.68 in > 37 hours, 1.3 TB ->
.75 TB
The filesystem performance was noticably laggy (ie ls took > 10 seconds) while
gzip -9 compression was used
do you have any idea if lossless jpeg compression is being planned for ZFS? We
can envisage of 1.3 TB, > .8 TB will be images and if we could get better or
equivalent compression on jpeg lossless compression with less impact on the
filesystem than gzip -9 compression, that would be worthwhile, if it worked.
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