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storage: add/fix revision/generation description 

This adds some struct descriptions to revision/generation structs and corrects
some spelling errors.
release-2.3
Gyu-Ho Lee 2015-12-28 14:17:06 -08:00
parent 0d7fb820c7
commit 5284c1c3bb
2 changed files with 11 additions and 3 deletions
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5
storage/key_index.go
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@ -44,9 +44,9 @@ var (
// {1.0, 2.0, 3.0(t)}
//
// Compact a keyIndex removes the versions with smaller or equal to
// rev except the largest one. If the generations becomes empty
// rev except the largest one. If the generation becomes empty
// during compaction, it will be removed. if all the generations get
// removed, the keyIndex Should be removed.
// removed, the keyIndex should be removed.
// For example:
// compact(2) on the previous example
@ -294,6 +294,7 @@ func (ki *keyIndex) String() string {
return s
}
// generation contains multiple revisions of a key.
type generation struct {
ver int64
created revision // when the generation is created (put in first revision).

9
storage/revision.go
View File

@ -21,9 +21,16 @@ import "encoding/binary"
// is a '_'. The last 8 bytes is the revision.sub in big-endian format.
const revBytesLen = 8 + 1 + 8
// A revision indicates modification of the key-value space.
// The set of changes that share same main revision changes the key-value space atomically.
type revision struct {
// main is the main revision of a set of changes that happen atomically.
main int64
sub int64
// sub is the the sub revision of a change in a set of changes that happen
// atomically. Each change has different increasing sub revision in that
// set.
sub int64
}
func (a revision) GreaterThan(b revision) bool {