dm cache: Documentation: update default migration_throttling value
In commit f8350daf7a
("dm cache: tune migration throttling") the
value for DEFAULT_MIGRATION_THRESHOLD was decreased from 204800 to
2048. Edit device-mapper/cache.txt to reflect the correct default
value for migration_threshold.
Signed-off-by: John Pittman <jpittman@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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@ -119,7 +119,7 @@ doing here to avoid migrating during those peak io moments.
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For the time being, a message "migration_threshold <#sectors>"
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can be used to set the maximum number of sectors being migrated,
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the default being 204800 sectors (100MB).
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the default being 2048 sectors (1MB).
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Updating on-disk metadata
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-------------------------
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