ZFS の値を調べるときにいつも場所を忘れてしまうためのメモ。
インストールしている ZFS on Linux のバージョンは次の通り 0.6.5.8 です。
> rpm -qa | grep zfs libzfs2-0.6.5.8-1.el7.centos.x86_64 zfs-release-1-3.el7.centos.noarch zfs-0.6.5.8-1.el7.centos.x86_64 zfs-dkms-0.6.5.8-1.el7.centos.noarch
場所は /sys/module/zfs/parameters/ です。設定できる項目は次のようになっています。
> ls /sys/module/zfs/parameters/ ignore_hole_birth zfs_arc_p_dampener_disable zfs_scan_idle l2arc_feed_again zfs_arc_p_min_shift zfs_scan_min_time_ms l2arc_feed_min_ms zfs_arc_shrink_shift zfs_scrub_delay l2arc_feed_secs zfs_arc_sys_free zfs_send_corrupt_data l2arc_headroom zfs_autoimport_disable zfs_sync_pass_deferred_free l2arc_headroom_boost zfs_dbgmsg_enable zfs_sync_pass_dont_compress l2arc_nocompress zfs_dbgmsg_maxsize zfs_sync_pass_rewrite l2arc_noprefetch zfs_dbuf_state_index zfs_top_maxinflight l2arc_norw zfs_deadman_enabled zfs_txg_history l2arc_write_boost zfs_deadman_synctime_ms zfs_txg_timeout l2arc_write_max zfs_dedup_prefetch zfs_vdev_aggregation_limit metaslab_aliquot zfs_delay_min_dirty_percent zfs_vdev_async_read_max_active metaslab_bias_enabled zfs_delay_scale zfs_vdev_async_read_min_active metaslab_debug_load zfs_dirty_data_max zfs_vdev_async_write_active_max_dirty_percent metaslab_debug_unload zfs_dirty_data_max_max zfs_vdev_async_write_active_min_dirty_percent metaslab_fragmentation_factor_enabled zfs_dirty_data_max_max_percent zfs_vdev_async_write_max_active metaslab_lba_weighting_enabled zfs_dirty_data_max_percent zfs_vdev_async_write_min_active metaslab_preload_enabled zfs_dirty_data_sync zfs_vdev_cache_bshift metaslabs_per_vdev zfs_disable_dup_eviction zfs_vdev_cache_max spa_asize_inflation zfs_expire_snapshot zfs_vdev_cache_size spa_config_path zfs_flags zfs_vdev_max_active spa_load_verify_data zfs_free_leak_on_eio zfs_vdev_mirror_switch_us spa_load_verify_maxinflight zfs_free_max_blocks zfs_vdev_read_gap_limit spa_load_verify_metadata zfs_free_min_time_ms zfs_vdev_scheduler spa_slop_shift zfs_immediate_write_sz zfs_vdev_scrub_max_active zfetch_array_rd_sz zfs_max_recordsize zfs_vdev_scrub_min_active zfetch_block_cap zfs_mdcomp_disable zfs_vdev_sync_read_max_active zfetch_max_streams zfs_metaslab_fragmentation_threshold zfs_vdev_sync_read_min_active zfetch_min_sec_reap zfs_mg_fragmentation_threshold zfs_vdev_sync_write_max_active zfs_admin_snapshot zfs_mg_noalloc_threshold zfs_vdev_sync_write_min_active zfs_arc_average_blocksize zfs_no_scrub_io zfs_vdev_write_gap_limit zfs_arc_grow_retry zfs_no_scrub_prefetch zfs_zevent_cols zfs_arc_lotsfree_percent zfs_nocacheflush zfs_zevent_console zfs_arc_max zfs_nopwrite_enabled zfs_zevent_len_max zfs_arc_meta_adjust_restarts zfs_object_mutex_size zil_replay_disable zfs_arc_meta_limit zfs_pd_bytes_max zil_slog_limit zfs_arc_meta_min zfs_prefetch_disable zio_delay_max zfs_arc_meta_prune zfs_read_chunk_size zio_requeue_io_start_cut_in_line zfs_arc_meta_strategy zfs_read_history zio_taskq_batch_pct zfs_arc_min zfs_read_history_hits zvol_inhibit_dev zfs_arc_min_prefetch_lifespan zfs_recover zvol_major zfs_arc_num_sublists_per_state zfs_resilver_delay zvol_max_discard_blocks zfs_arc_p_aggressive_disable zfs_resilver_min_time_ms zvol_prefetch_bytes
catコマンドなどで中身を見ることができます。
> cat zfs_dirty_data_max 3340944179
