>> I think this is an artifact of how gzip compression works, it doesn't >> have an unlimited size window. It's 32k, iirc. Fio should fill so that >> it ideally would compress to the given size with an ideal compression >> algorithm. >> >> You'd probably want to use buffer_compress_chunk=x to always force fio >> to operate in sizes of that for compression, if you want to ensure that >> gzip would be able to compress to the specified ratio. I do think we >> have a loop missing though for that to do what you need, let me test >> that and report back. > > > I think things should work for all sizes, if you add this patch and then add > buffer_compress_chunk=32k or similar to your job file. You can do that for > smaller block sizes as well, fio will use the minimum of that chunk size or > the write block size. > > -- > Jens Axboe > Applied the patch and added buffer_compress_chunk=32k and now it's working for all block sizes. Thank you for the info and the patch! -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
