On Fri, Apr 10, 2020 at 09:39:18AM +0200, Pierre Neidhardt wrote: > > So compression saves me 26% ([69-51]/69), and deduplication saves me > > 62% ([180-69]/180). > > Thanks for sharing! > zstd might give better results. Any reason you chose lzo over zstd? > My machine is about 10 years old so I was more concerned than normal about the CPU usage. If lz4 was an option I would've gone with that, but according to the Arch wiki or some other locations lzo was basically the fastest option. Since mail is mostly text I occasionally recompress that. I haven't figured out how to use 'btrfs filesystem defragment' to choose the compression level for zstd. (ins)efraim@E5400 ~$ sudo compsize Maildir/ Password: Processed 121378 files, 129245 regular extents (129245 refs), 19963 inline. Type Perc Disk Usage Uncompressed Referenced TOTAL 66% 3.3G 4.9G 4.9G none 100% 282M 282M 282M zlib 55% 137K 248K 248K lzo 53% 125M 233M 233M zstd 64% 2.9G 4.4G 4.4G -- Efraim Flashner אפרים פלשנר GPG key = A28B F40C 3E55 1372 662D 14F7 41AA E7DC CA3D 8351 Confidentiality cannot be guaranteed on emails sent or received unencrypted