Device Mapper Cache Input Plugin
This plugin provide a native collection for dmsetup based statistics for dm-cache.
This plugin requires super-user permissions! Please make sure, Telegraf is
able to run sudo /sbin/dmsetup status --target cache without requiring a
password.
Introduced in: Telegraf v1.3.0 Tags: system OS support: linux
Global configuration options
Plugins support additional global and plugin configuration settings for tasks such as modifying metrics, tags, and fields, creating aliases, and configuring plugin ordering. See CONFIGURATION.md for more details.
Configuration
# Provide a native collection for dmsetup based statistics for dm-cache
# This plugin ONLY supports Linux
[[inputs.dmcache]]
## Whether to report per-device stats or not
per_device = trueMetrics
- dmcache
- length
- target
- metadata_blocksize
- metadata_used
- metadata_total
- cache_blocksize
- cache_used
- cache_total
- read_hits
- read_misses
- write_hits
- write_misses
- demotions
- promotions
- dirty
Tags
- All measurements have the following tags:
- device
Example Output
dmcache,device=example cache_blocksize=0i,read_hits=995134034411520i,read_misses=916807089127424i,write_hits=195107267543040i,metadata_used=12861440i,write_misses=563725346013184i,promotions=3265223720960i,dirty=0i,metadata_blocksize=0i,cache_used=1099511627776ii,cache_total=0i,length=0i,metadata_total=1073741824i,demotions=3265223720960i 1491482035000000000Was this page helpful?
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