cache

Documentation

Index

• Constants
• Variables
• func Enabled(kvs config.KVS) bool
• func SetCacheConfig(s config.Config, cfg Config)
• type Config
  • func LookupConfig(kvs config.KVS) (Config, error)
  • func (cfg *Config) UnmarshalJSON(data []byte) (err error)

Constants

const (
	// WriteBack allows staging and write back of cached content for single object uploads
	WriteBack = "writeback"
	// WriteThrough allows caching multipart uploads to disk synchronously
	WriteThrough = "writethrough"
)

const (
	Drives        = "drives"
	Exclude       = "exclude"
	Expiry        = "expiry"
	MaxUse        = "maxuse"
	Quota         = "quota"
	After         = "after"
	WatermarkLow  = "watermark_low"
	WatermarkHigh = "watermark_high"
	Range         = "range"
	Commit        = "commit"

	EnvCacheDrives        = "MINIO_CACHE_DRIVES"
	EnvCacheExclude       = "MINIO_CACHE_EXCLUDE"
	EnvCacheExpiry        = "MINIO_CACHE_EXPIRY"
	EnvCacheMaxUse        = "MINIO_CACHE_MAXUSE"
	EnvCacheQuota         = "MINIO_CACHE_QUOTA"
	EnvCacheAfter         = "MINIO_CACHE_AFTER"
	EnvCacheWatermarkLow  = "MINIO_CACHE_WATERMARK_LOW"
	EnvCacheWatermarkHigh = "MINIO_CACHE_WATERMARK_HIGH"
	EnvCacheRange         = "MINIO_CACHE_RANGE"
	EnvCacheCommit        = "MINIO_CACHE_COMMIT"

	EnvCacheEncryptionKey = "MINIO_CACHE_ENCRYPTION_SECRET_KEY"

	DefaultExpiry        = "90"
	DefaultQuota         = "80"
	DefaultAfter         = "0"
	DefaultWaterMarkLow  = "70"
	DefaultWaterMarkHigh = "80"
)

Cache ENVs

Variables

var (
	DefaultKVS = config.KVS{
		config.KV{
			Key:   Drives,
			Value: "",
		},
		config.KV{
			Key:   Exclude,
			Value: "",
		},
		config.KV{
			Key:   Expiry,
			Value: DefaultExpiry,
		},
		config.KV{
			Key:   Quota,
			Value: DefaultQuota,
		},
		config.KV{
			Key:   After,
			Value: DefaultAfter,
		},
		config.KV{
			Key:   WatermarkLow,
			Value: DefaultWaterMarkLow,
		},
		config.KV{
			Key:   WatermarkHigh,
			Value: DefaultWaterMarkHigh,
		},
		config.KV{
			Key:   Range,
			Value: config.EnableOn,
		},
		config.KV{
			Key:   Commit,
			Value: "",
		},
	}
)

DefaultKVS - default KV settings for caching.

var (
	Help = config.HelpKVS{
		config.HelpKV{
			Key:         Drives,
			Description: `comma separated mountpoints e.g. "/optane1,/optane2"`,
			Type:        "csv",
		},
		config.HelpKV{
			Key:         Expiry,
			Description: `cache expiry duration in days e.g. "90"`,
			Optional:    true,
			Type:        "number",
		},
		config.HelpKV{
			Key:         Quota,
			Description: `limit cache drive usage in percentage e.g. "90"`,
			Optional:    true,
			Type:        "number",
		},
		config.HelpKV{
			Key:         Exclude,
			Description: `exclude cache for following patterns e.g. "bucket/*.tmp,*.exe"`,
			Optional:    true,
			Type:        "csv",
		},
		config.HelpKV{
			Key:         After,
			Description: `minimum number of access before caching an object`,
			Optional:    true,
			Type:        "number",
		},
		config.HelpKV{
			Key:         WatermarkLow,
			Description: `% of cache use at which to stop cache eviction`,
			Optional:    true,
			Type:        "number",
		},
		config.HelpKV{
			Key:         WatermarkHigh,
			Description: `% of cache use at which to start cache eviction`,
			Optional:    true,
			Type:        "number",
		},
		config.HelpKV{
			Key:         Range,
			Description: `set to "on" or "off" caching of independent range requests per object, defaults to "on"`,
			Optional:    true,
			Type:        "string",
		},
		config.HelpKV{
			Key:         Commit,
			Description: `set to control cache commit behavior, defaults to "writethrough"`,
			Optional:    true,
			Type:        "string",
		},
		config.HelpKV{
			Key:         config.Comment,
			Description: config.DefaultComment,
			Optional:    true,
			Type:        "sentence",
		},
	}
)

Help template for caching feature.

Functions

func Enabled

func Enabled(kvs config.KVS) bool

Enabled returns if cache is enabled.

func SetCacheConfig

func SetCacheConfig(s config.Config, cfg Config)

SetCacheConfig - One time migration code needed, for migrating from older config to new for Cache.

Types

type Config

type Config struct {
	Enabled         bool     `json:"-"`
	Drives          []string `json:"drives"`
	Expiry          int      `json:"expiry"`
	MaxUse          int      `json:"maxuse"`
	Quota           int      `json:"quota"`
	Exclude         []string `json:"exclude"`
	After           int      `json:"after"`
	WatermarkLow    int      `json:"watermark_low"`
	WatermarkHigh   int      `json:"watermark_high"`
	Range           bool     `json:"range"`
	CacheCommitMode string   `json:"commit"`
}

Config represents cache config settings

func LookupConfig

func LookupConfig(kvs config.KVS) (Config, error)

LookupConfig - extracts cache configuration provided by environment variables and merge them with provided CacheConfiguration.

func (*Config) UnmarshalJSON

func (cfg *Config) UnmarshalJSON(data []byte) (err error)

UnmarshalJSON - implements JSON unmarshal interface for unmarshalling json entries for CacheConfig.