file_system_http_cachev3

package
v0.0.2 Latest Latest
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 Go to latest Published: Aug 8, 2024 License: Apache-2.0 Imports: 10 Imported by: 0

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Constants

This section is empty.

Variables

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var File_envoy_extensions_http_cache_file_system_http_cache_v3_file_system_http_cache_proto protoreflect.FileDescriptor

Functions

This section is empty.

Types

type FileSystemHttpCacheConfig 

type FileSystemHttpCacheConfig struct {

	// Configuration of a manager for how the file system is used asynchronously.
	ManagerConfig *v3.AsyncFileManagerConfig `protobuf:"bytes,1,opt,name=manager_config,json=managerConfig,proto3" json:"manager_config,omitempty"`
	// Path at which the cache files will be stored.
	//
	// This also doubles as the unique identifier for a cache, so a cache can be shared
	// between different routes, or separate paths can be used to specify separate caches.
	//
	// If the same “cache_path“ is used in more than one “CacheConfig“, the rest of the
	// “FileSystemHttpCacheConfig“ must also match, and will refer to the same cache
	// instance.
	CachePath string `protobuf:"bytes,2,opt,name=cache_path,json=cachePath,proto3" json:"cache_path,omitempty"`
	// The maximum size of the cache in bytes - when reached, cache eviction is triggered.
	//
	// This is measured as the sum of file sizes, such that it includes headers, trailers,
	// and metadata, but does not include e.g. file system overhead and block size padding.
	//
	// If unset there is no limit except file system failure.
	MaxCacheSizeBytes *wrapperspb.UInt64Value `protobuf:"bytes,3,opt,name=max_cache_size_bytes,json=maxCacheSizeBytes,proto3" json:"max_cache_size_bytes,omitempty"`
	// The maximum size of a cache entry in bytes - larger responses will not be cached.
	//
	// This is measured as the file size for the cache entry, such that it includes
	// headers, trailers, and metadata.
	//
	// If unset there is no limit.
	//
	// [#not-implemented-hide:]
	MaxIndividualCacheEntrySizeBytes *wrapperspb.UInt64Value `` /* 165-byte string literal not displayed */
	// The maximum number of cache entries - when reached, cache eviction is triggered.
	//
	// If unset there is no limit.
	MaxCacheEntryCount *wrapperspb.UInt64Value `protobuf:"bytes,5,opt,name=max_cache_entry_count,json=maxCacheEntryCount,proto3" json:"max_cache_entry_count,omitempty"`
	// A number of folders into which to subdivide the cache.
	//
	// Setting this can help with performance in file systems where a large number of inodes
	// in a single branch degrades performance. The optimal value in that case would be
	// “sqrt(expected_cache_entry_count)“.
	//
	// On file systems that perform well with many inodes, the default value of 1 should be used.
	//
	// [#not-implemented-hide:]
	CacheSubdivisions uint32 `protobuf:"varint,6,opt,name=cache_subdivisions,json=cacheSubdivisions,proto3" json:"cache_subdivisions,omitempty"`
	// The amount of the maximum cache size or count to evict when cache eviction is
	// triggered. For example, if “max_cache_size_bytes“ is 10000000 and “evict_fraction“
	// is 0.2, then when the cache exceeds 10MB, entries will be evicted until the cache size is
	// less than or equal to 8MB.
	//
	// The default value of 0 means when the cache exceeds 10MB, entries will be evicted only
	// until the cache is less than or equal to 10MB.
	//
	// Evicting a larger fraction will mean the eviction thread will run less often (sparing
	// CPU load) at the cost of more cache misses due to the extra evicted entries.
	//
	// [#not-implemented-hide:]
	EvictFraction float32 `protobuf:"fixed32,7,opt,name=evict_fraction,json=evictFraction,proto3" json:"evict_fraction,omitempty"`
	// The longest amount of time to wait before running a cache eviction pass. An eviction
	// pass may not necessarily remove any files, but it will update the cache state to match
	// the on-disk state. This can be important if multiple instances are accessing the same
	// cache in parallel. (e.g. if two instances each independently added non-overlapping 10MB
	// of content to a cache with a 15MB limit, neither instance would be aware that the limit
	// was exceeded without this synchronizing pass.)
	//
	// If an eviction pass has not happened within this duration, the eviction thread will
	// be awoken and perform an eviction pass.
	//
	// If unset, there will be no eviction passes except those triggered by cache limits.
	//
	// [#not-implemented-hide:]
	MaxEvictionPeriod *durationpb.Duration `protobuf:"bytes,8,opt,name=max_eviction_period,json=maxEvictionPeriod,proto3" json:"max_eviction_period,omitempty"`
	// The shortest amount of time between cache eviction passes. This can be used to reduce
	// eviction churn, if your cache max size can be flexible. If a cache eviction pass already
	// occurred more recently than this period when another would be triggered, that new
	// pass is cancelled.
	//
	// This means the cache can potentially grow beyond “max_cache_size_bytes“ by as much as
	// can be written within the duration specified.
	//
	// Generally you would use *either* “min_eviction_period“ *or* “evict_fraction“ to
	// reduce churn. Both together will work but since they're both aiming for the same goal,
	// it's simpler not to.
	//
	// [#not-implemented-hide:]
	MinEvictionPeriod *durationpb.Duration `protobuf:"bytes,9,opt,name=min_eviction_period,json=minEvictionPeriod,proto3" json:"min_eviction_period,omitempty"`
	// If true, and the cache path does not exist, attempt to create the cache path, including
	// any missing directories leading up to it. On failure, the config is rejected.
	//
	// If false, and the cache path does not exist, the config is rejected.
	//
	// [#not-implemented-hide:]
	CreateCachePath bool `protobuf:"varint,10,opt,name=create_cache_path,json=createCachePath,proto3" json:"create_cache_path,omitempty"`
	// contains filtered or unexported fields
}

Configuration for a cache implementation that caches in the local file system.

By default this cache uses a least-recently-used eviction strategy.

For implementation details, see `DESIGN.md <https://github.com/envoyproxy/envoy/blob/main/source/extensions/http/cache/file_system_http_cache/DESIGN.md>`_. [#next-free-field: 11]

func (*FileSystemHttpCacheConfig) Descriptor deprecated 

func (*FileSystemHttpCacheConfig) Descriptor() ([]byte, []int)

Deprecated: Use FileSystemHttpCacheConfig.ProtoReflect.Descriptor instead.

func (*FileSystemHttpCacheConfig) GetCachePath 

func (x *FileSystemHttpCacheConfig) GetCachePath() string

func (*FileSystemHttpCacheConfig) GetCacheSubdivisions 

func (x *FileSystemHttpCacheConfig) GetCacheSubdivisions() uint32

func (*FileSystemHttpCacheConfig) GetCreateCachePath 

func (x *FileSystemHttpCacheConfig) GetCreateCachePath() bool

func (*FileSystemHttpCacheConfig) GetEvictFraction 

func (x *FileSystemHttpCacheConfig) GetEvictFraction() float32

func (*FileSystemHttpCacheConfig) GetManagerConfig 

func (x *FileSystemHttpCacheConfig) GetManagerConfig() *v3.AsyncFileManagerConfig

func (*FileSystemHttpCacheConfig) GetMaxCacheEntryCount 

func (x *FileSystemHttpCacheConfig) GetMaxCacheEntryCount() *wrapperspb.UInt64Value

func (*FileSystemHttpCacheConfig) GetMaxCacheSizeBytes 

func (x *FileSystemHttpCacheConfig) GetMaxCacheSizeBytes() *wrapperspb.UInt64Value

func (*FileSystemHttpCacheConfig) GetMaxEvictionPeriod 

func (x *FileSystemHttpCacheConfig) GetMaxEvictionPeriod() *durationpb.Duration

func (*FileSystemHttpCacheConfig) GetMaxIndividualCacheEntrySizeBytes 

func (x *FileSystemHttpCacheConfig) GetMaxIndividualCacheEntrySizeBytes() *wrapperspb.UInt64Value

func (*FileSystemHttpCacheConfig) GetMinEvictionPeriod 

func (x *FileSystemHttpCacheConfig) GetMinEvictionPeriod() *durationpb.Duration

func (*FileSystemHttpCacheConfig) ProtoMessage 

func (*FileSystemHttpCacheConfig) ProtoMessage()

func (*FileSystemHttpCacheConfig) ProtoReflect 

func (x *FileSystemHttpCacheConfig) ProtoReflect() protoreflect.Message

func (*FileSystemHttpCacheConfig) Reset 

func (x *FileSystemHttpCacheConfig) Reset()

func (*FileSystemHttpCacheConfig) String 

func (x *FileSystemHttpCacheConfig) String() string

Source Files

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