88 lines
2.5 KiB
Go
88 lines
2.5 KiB
Go
package channeldb
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import "github.com/lightningnetwork/lnd/clock"
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const (
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// DefaultRejectCacheSize is the default number of rejectCacheEntries to
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// cache for use in the rejection cache of incoming gossip traffic. This
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// produces a cache size of around 1MB.
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DefaultRejectCacheSize = 50000
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// DefaultChannelCacheSize is the default number of ChannelEdges cached
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// in order to reply to gossip queries. This produces a cache size of
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// around 40MB.
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DefaultChannelCacheSize = 20000
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)
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// Options holds parameters for tuning and customizing a channeldb.DB.
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type Options struct {
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// RejectCacheSize is the maximum number of rejectCacheEntries to hold
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// in the rejection cache.
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RejectCacheSize int
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// ChannelCacheSize is the maximum number of ChannelEdges to hold in the
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// channel cache.
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ChannelCacheSize int
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// NoFreelistSync, if true, prevents the database from syncing its
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// freelist to disk, resulting in improved performance at the expense of
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// increased startup time.
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NoFreelistSync bool
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// clock is the time source used by the database.
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clock clock.Clock
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// dryRun will fail to commit a successful migration when opening the
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// database if set to true.
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dryRun bool
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}
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// DefaultOptions returns an Options populated with default values.
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func DefaultOptions() Options {
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return Options{
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RejectCacheSize: DefaultRejectCacheSize,
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ChannelCacheSize: DefaultChannelCacheSize,
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NoFreelistSync: true,
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clock: clock.NewDefaultClock(),
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}
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}
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// OptionModifier is a function signature for modifying the default Options.
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type OptionModifier func(*Options)
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// OptionSetRejectCacheSize sets the RejectCacheSize to n.
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func OptionSetRejectCacheSize(n int) OptionModifier {
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return func(o *Options) {
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o.RejectCacheSize = n
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}
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}
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// OptionSetChannelCacheSize sets the ChannelCacheSize to n.
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func OptionSetChannelCacheSize(n int) OptionModifier {
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return func(o *Options) {
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o.ChannelCacheSize = n
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}
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}
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// OptionSetSyncFreelist allows the database to sync its freelist.
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func OptionSetSyncFreelist(b bool) OptionModifier {
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return func(o *Options) {
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o.NoFreelistSync = !b
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}
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}
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// OptionClock sets a non-default clock dependency.
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func OptionClock(clock clock.Clock) OptionModifier {
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return func(o *Options) {
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o.clock = clock
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}
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}
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// OptionDryRunMigration controls whether or not to intentially fail to commit a
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// successful migration that occurs when opening the database.
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func OptionDryRunMigration(dryRun bool) OptionModifier {
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return func(o *Options) {
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o.dryRun = dryRun
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}
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}
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