Hi, Changes since the last posting: - Added a specific per-file fadvise setting. POSIX_FADV_STREAMID sets the inode and file stream ID, POSIX_FADV_STREAMID_FILE sets just the file stream ID. - Addressed review comments. I've since run some testing with write streams. Test case was a RocksDB overwrite benchmark, using 3 billion keys of 400B in size (numbers set use the full size of the device). WAL/LOG was assigned to stream 1, and each RocksDB compaction level used a separate stream. With streams enabled, user write to device writes (write amplification) was at 2.33. Without streams, the write amplification was 3.05. That is roughly 20% less written NAND, and the streams test subsequently also had 20% higher throughput. Unless there are any grave concerns here, I'd like to merge this for 4.2. -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
