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by js2
1969 days ago
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Assuming you have a larger record size than block size (with media files you probably want a 1M record size), and that you probably have ashift set to 12 (4k) or 13 (8k), then I believe you need to enable compression in order to prevent the final record from using the full record size. IOW, ZFS will pad out the final record with zeros to the full record size, then use compression on it (if enabled) so that the zeros don't need to be written to disk. This article refers to the padding on the final record as "slack space" and states that you need to enable compression to eliminate the slack space. https://arstechnica.com/information-technology/2020/05/zfs-1... See also: https://old.reddit.com/r/zfs/comments/gzcysy/h264_h265_media... |
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