> Subject: compression disk space saving - what are your results? > > What are your disk space savings when using btrfs with compression?
I checked that for some folders when I moved from ext4 to btrfs. I compared du with df** just to get some numbers. I use lzo since btrfs-wiki said its better for speed. Percent_saving=(1-df/du)*100: 47% (mostly endless text files, source code etc., total amount of data is about 1TB) 2%-10% (for data which is mostly in the form of large (several hundred MB up to fewGB) binary files, total amount is about 4TB) 23% (for something in between, total amount is 0.4TB) Result indicate pretty clearly: large binary files are almost not compressed - without understanding much of it that's what I would intuitively expect (afaik lzo is dictionary based and those binary files have little for that). ** du -s on the folder I copied to the btrfs drive. df is the difference in between a df before and after the copy. Based on casual checking results were consistent with the space needed on the old ext4 drive. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
