База знаний » GNU/Linux

h1. Lvm-cache-stats

В debian 8 jessie

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  LVM version:     2.02.111(2) (2014-09-01)

  Library version: 1.02.90 (2014-09-01)

  Driver version:  4.27.0

</pre>

lvs не умеет показывать

<pre>

    cache_total_blocks     - Total cache blocks.

    cache_used_blocks      - Used cache blocks.

    cache_dirty_blocks     - Dirty cache blocks.

    cache_read_hits        - Cache read hits.

    cache_read_misses      - Cache read misses.

    cache_write_hits       - Cache write hits.

    cache_write_misses     - Cache write misses.

</pre>

Получить эти данные можем через dmsetup

<pre>

NAME="my_logical_volume_name"; read -a ARR <<<$(dmsetup status $NAME); C=0;for N in start end segment_type md_block_size md_utilization cache_block_size cache_utilization read_hits read_misses write_hits write_misses demotions promotions dirty features; do echo "${N}: ${ARR[$C]}";((C++)); done

</pre>