48 lines
1.3 KiB
Markdown
48 lines
1.3 KiB
Markdown
# DMCache Input Plugin
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This plugin provide a native collection for dmsetup based statistics for dm-cache.
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This plugin requires sudo, that is why you should setup and be sure that the telegraf is able to execute sudo without a password.
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`sudo /sbin/dmsetup status --target cache` is the full command that telegraf will run for debugging purposes.
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### Configuration
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```toml
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[[inputs.dmcache]]
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## Whether to report per-device stats or not
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per_device = true
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```
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### Measurements & Fields:
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- dmcache
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- length
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- target
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- metadata_blocksize
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- metadata_used
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- metadata_total
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- cache_blocksize
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- cache_used
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- cache_total
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- read_hits
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- read_misses
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- write_hits
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- write_misses
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- demotions
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- promotions
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- dirty
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### Tags:
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- All measurements have the following tags:
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- device
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### Example Output:
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```
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$ ./telegraf --test --config /etc/telegraf/telegraf.conf --input-filter dmcache
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* Plugin: inputs.dmcache, Collection 1
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> 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 1491482035000000000
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```
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