boltdb

每个db对应一个文件
在逻辑上,一个db包含多个bucket，相当于多个namespace,每个bucket对应一颗B+树，每个bucket的root节点在顶层也组织成一颗树，但不一定是B+树
在物理上,一个db文件按页为单位进行顺序存储,一个页的大小和操作系统页的大小保持一致(4KB)

Name		Name	Last commit message	Last commit date
Latest commit History 6 Commits
cmd/bolt		cmd/bolt
test		test
.gitignore		.gitignore
LICENSE		LICENSE
Makefile		Makefile
README.md		README.md
appveyor.yml		appveyor.yml
bolt_386.go		bolt_386.go
bolt_amd64.go		bolt_amd64.go
bolt_arm.go		bolt_arm.go
bolt_arm64.go		bolt_arm64.go
bolt_linux.go		bolt_linux.go
bolt_openbsd.go		bolt_openbsd.go
bolt_ppc.go		bolt_ppc.go
bolt_ppc64.go		bolt_ppc64.go
bolt_ppc64le.go		bolt_ppc64le.go
bolt_s390x.go		bolt_s390x.go
bolt_unix.go		bolt_unix.go
bolt_unix_solaris.go		bolt_unix_solaris.go
bolt_windows.go		bolt_windows.go
boltsync_unix.go		boltsync_unix.go
bucket.go		bucket.go
cursor.go		cursor.go
db.go		db.go
doc.go		doc.go
errors.go		errors.go
freelist.go		freelist.go
go.mod		go.mod
go.sum		go.sum
node.go		node.go
page.go		page.go
quick_test.go		quick_test.go
simulation_test.go		simulation_test.go
tx.go		tx.go

hfdpx/boltdb