ZFS on MAC OSX
ZFS 是很好檔案系統,可惜因為種種原因…沒有機會在OSX 上面使用.
MACZFS
是好心人porting到MAC OSX上面,只要下載安裝包下來就可以直接使用.
以下是實際使用方式:
先查看目前磁碟使用狀況.
# diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 300.9 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
4: Apple_HFS data 198.2 GB disk0s4
查看目前支援的ZFS 版本到哪一個版本.
# zpool upgrade -v
This system is currently running ZFS pool version 8.
The following versions are supported:
VER DESCRIPTION
--- --------------------------------------------------------
1 Initial ZFS version
2 Ditto blocks (replicated metadata)
3 Hot spares and double parity RAID-Z
4 zpool history
5 Compression using the gzip algorithm
6 pool properties
7 Separate intent log devices
8 Delegated administration
For more information on a particular version, including supported releases, see:
http://www.opensolaris.org/os/community/zfs/version/N
Where 'N' is the version number.
將目前磁區縮小,並建立一個名稱ZFS新磁區.[
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# diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 240.0 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s5
4: Apple_HFS ZFS 60.0 GB disk0s4
將新磁區zfs,清除格式化為ZFS格式
# diskutil eraseVolume ZFS %noformat% /dev/disk0s4
Started erase on disk0s4 ZFS
Unmounting disk
Erasing
Finished erase on disk0s4 ZFS
建立新zpool
# zpool create pool1 disk0s4
# zpool status pool1
pool: pool1
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
pool1 ONLINE 0 0 0
disk0s4 ONLINE 0 0 0
errors: No known data errors
# diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 240.0 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s5
4: ZFS pool1 60.0 GB disk0s4
# zfs list
NAME USED AVAIL REFER MOUNTPOINT
pool1 1.07M 54.6G 1005K /Volumes/pool1
設定屬性compression=gzip壓縮檔按以節省空間
# zfs set compression=gzip pool1
# zfs get all pool1 (11-23 01:07)
NAME PROPERTY VALUE SOURCE
pool1 type filesystem -
pool1 creation 三 11 23 0:55 2011 -
pool1 used 370K -
pool1 available 54.6G -
pool1 referenced 284K -
pool1 compressratio 1.00x -
pool1 mounted yes -
pool1 quota none default
pool1 reservation none default
pool1 recordsize 128K default
pool1 mountpoint /Volumes/pool1 default
pool1 sharenfs off default
pool1 checksum on default
pool1 compression gzip local
pool1 atime on default
pool1 devices on default
pool1 exec on default
pool1 setuid on default
pool1 readonly off default
pool1 zoned off default
pool1 snapdir hidden default
pool1 aclmode groupmask default
pool1 aclinherit secure default
pool1 canmount on default
pool1 shareiscsi off default
pool1 xattr on default
pool1 copies 1 default
pool1 version 2 -
以下是我開了一個mysql_data的節點使用壓縮compression=gzip,exec=off.
各位可以看到壓縮比compressratio = 4.18x 等於說我原本這些資料佔用6.85G 現在節省到只佔用1.64G！！！！
幫我MBP節省寶貴空間,如果你是用SSD更是要必需計較空間使用在此強力推薦ZFS來使用.(不過打開壓縮勢必在存取檔案消耗更多CPU）
# zfs get all pool1/mysql_data
NAME PROPERTY VALUE SOURCE
pool1/mysql_data type filesystem -
pool1/mysql_data creation 三 11 23 1:56 2011 -
pool1/mysql_data used 1.64G -
pool1/mysql_data available 14.9G -
pool1/mysql_data referenced 1.64G -
pool1/mysql_data compressratio 4.18x -
pool1/mysql_data mounted yes -
pool1/mysql_data quota none default
pool1/mysql_data reservation none default
pool1/mysql_data recordsize 128K default
pool1/mysql_data mountpoint /Volumes/pool1/mysql_data default
pool1/mysql_data sharenfs off default
pool1/mysql_data checksum on default
pool1/mysql_data compression gzip local
pool1/mysql_data atime on default
pool1/mysql_data devices on default
pool1/mysql_data exec off local
pool1/mysql_data setuid on default
pool1/mysql_data readonly off default
pool1/mysql_data zoned off default
pool1/mysql_data snapdir hidden default
pool1/mysql_data aclmode groupmask default
pool1/mysql_data aclinherit secure default
pool1/mysql_data canmount on default
pool1/mysql_data shareiscsi off default
pool1/mysql_data xattr on default
pool1/mysql_data copies 1 default
pool1/mysql_data version 2 -