編輯：關於Android編程
安裝前准備：
1. Windows系統
2. Xshell遠程ssh軟件
3. 在CentOS上安裝好Gluster集群的集群機
（1） 分布式卷（哈希卷）
[root@server01 ~]# gluster volume create dht server01:/Data/dht1 server02:/Data/dht2 server03:/Data/dht3 server04:/Data/dht4 force // 創建一個名為dht的哈希卷 volume create: dht: success: please start the volume to access data [root@server01 ~]# [root@server01 ~]# gluster volume start dht // 啟動哈希卷 volume start: dht: success [root@server01 ~]# gluster volume status // 查看卷的情況 Status of volume: dht Gluster process Port Online Pid ------------------------------------------------------------------------------ Brick server01:/Data/dht1 49153 Y 1787 Brick server02:/Data/dht2 49153 Y 1631 Brick server03:/Data/dht3 49153 Y 1607 Brick server04:/Data/dht4 49153 Y 1626 NFS Server on localhost 2049 Y 1797 NFS Server on server02 2049 Y 1641 NFS Server on server03 2049 Y 1617 NFS Server on server04 2049 Y 1636 There are no active volume tasks [root@server01 ~]#
（2） 復制卷
[root@server01 ~]# gluster volume create afr replica 2 server01:/Data/afr1 server02:/Data/afr2 server03:/Data/afr3 server04:/Data/afr4 force // 創建一組備份為2的復制卷 volume create: afr: success: please start the volume to access data [root@server01 ~]# gluster volume start afr // 啟動復制卷 volume start: afr: success [root@server01 ~]# gluster volume status afr // 查看復制卷的大小 Status of volume: afr Gluster process Port Online Pid ------------------------------------------------------------------------------ Brick server01:/Data/afr1 49154 Y 1823 Brick server02:/Data/afr2 49154 Y 1647 Brick server03:/Data/afr3 49154 Y 1623 Brick server04:/Data/afr4 49154 Y 1643 NFS Server on localhost 2049 Y 1833 Self-heal Daemon on localhost N/A Y 1840 NFS Server on server02 2049 Y 1659 Self-heal Daemon on server02 N/A Y 1663 NFS Server on server03 2049 Y 1633 Self-heal Daemon on server03 N/A Y 1639 NFS Server on server04 2049 Y 1655 Self-heal Daemon on server04 N/A Y 1659 There are no active volume tasks [root@server01 ~]#
注意：這裡的文件夾數，必須是replica的倍數，而且最好文件夾在一台機器上不要出現兩個，因為復制卷有復制的屬性，可能將兩個備份全部放置在一台機器上，數據不安全。
（3） 條帶卷
[root@server01 Data]# gluster volume create stp stripe 2 server01:/Data/stp1 server02:/Data/stp2 server03:/Data/stp3 server04:/Data/stp4 force // 創建一個條帶卷 volume create: stp: success: please start the volume to access data [root@server01 Data]# gluster volume start stp // 啟動條帶卷 volume start: stp: success [root@server01 Data]# gluster volume status stp // 查看條帶卷的狀態 Status of volume: stp Gluster process Port Online Pid ------------------------------------------------------------------------------ Brick server01:/Data/stp1 49155 Y 1873 Brick server02:/Data/stp2 49155 Y 1672 Brick server03:/Data/stp3 49155 Y 1646 Brick server04:/Data/stp4 49155 Y 1667 NFS Server on localhost 2049 Y 1883 NFS Server on server02 2049 Y 1682 NFS Server on server04 2049 Y 1677 NFS Server on server03 2049 Y 1656 There are no active volume tasks [root@server01 Data]#
（4） 哈希+復制卷
[root@server01 ~]# gluster volume create dht_afr replica 2 server01:/Data/dht_afr1 server02:/Data/dht_afr2 server03:/Data/dht_afr3 server04:/Data/dht_afr4 server01:/Data/dht_afr5 server02:/Data/dht_afr6 server03:/Data/dht_afr7 server04:/Data/dht_afr8 force // 創建8個brick，2備份的哈希+復制卷 volume create: dht_afr: success: please start the volume to access data [root@server01 ~]# gluster volume start dht_afr // 啟動卷 volume start: dht_afr: success [root@server01 ~]# gluster volume status dht_afr // 查看卷的情況 Status of volume: dht_afr Gluster process Port Online Pid ------------------------------------------------------------------------------ Brick server01:/Data/dht_afr1 49156 Y 1911 Brick server02:/Data/dht_afr2 49156 Y 1690 Brick server03:/Data/dht_afr3 49156 Y 1662 Brick server04:/Data/dht_afr4 49156 Y 1683 Brick server01:/Data/dht_afr5 49157 Y 1920 Brick server02:/Data/dht_afr6 49157 Y 1699 Brick server03:/Data/dht_afr7 49157 Y 1671 Brick server04:/Data/dht_afr8 49157 Y 1692 NFS Server on localhost 2049 Y 1930 Self-heal Daemon on localhost N/A Y 1937 NFS Server on server02 2049 Y 1709 Self-heal Daemon on server02 N/A Y 1716 NFS Server on server04 2049 Y 1702 Self-heal Daemon on server04 N/A Y 1709 NFS Server on server03 2049 Y 1681 Self-heal Daemon on server03 N/A Y 1688 There are no active volume tasks [root@server01 ~]#
（5） 查看所有卷的情況
[root@server01 ~]# gluster volume info // 查看命令 Volume Name: dht Type: Distribute Volume ID: fe5af0f8-1b43-46ab-ad91-da87b4e99e62 Status: Started Number of Bricks: 4 Transport-type: tcp Bricks: Brick1: server01:/Data/dht1 Brick2: server02:/Data/dht2 Brick3: server03:/Data/dht3 Brick4: server04:/Data/dht4 Volume Name: afr Type: Distributed-Replicate Volume ID: b2705571-054f-4532-909d-54af0a372fe7 Status: Started Number of Bricks: 2 x 2 = 4 Transport-type: tcp Bricks: Brick1: server01:/Data/afr1 Brick2: server02:/Data/afr2 Brick3: server03:/Data/afr3 Brick4: server04:/Data/afr4 Volume Name: stp Type: Distributed-Stripe Volume ID: e2dd3d60-a168-4bb2-bbf7-fdca2b8795a9 Status: Started Number of Bricks: 2 x 2 = 4 Transport-type: tcp Bricks: Brick1: server01:/Data/stp1 Brick2: server02:/Data/stp2 Brick3: server03:/Data/stp3 Brick4: server04:/Data/stp4 Volume Name: dht_afr Type: Distributed-Replicate Volume ID: 1661d1e5-7fbd-472a-a602-f844c33cf451 Status: Started Number of Bricks: 4 x 2 = 8 Transport-type: tcp Bricks: Brick1: server01:/Data/dht_afr1 Brick2: server02:/Data/dht_afr2 Brick3: server03:/Data/dht_afr3 Brick4: server04:/Data/dht_afr4 Brick5: server01:/Data/dht_afr5 Brick6: server02:/Data/dht_afr6 Brick7: server03:/Data/dht_afr7 Brick8: server04:/Data/dht_afr8 [root@server01 ~]#
（1） 在client上測試是否連通（掛載文件系統掛哪個集群主機都行）
[root@client ~]# ping server01 PING server01 (192.168.220.136) 56(84) bytes of data. 64 bytes from server01 (192.168.220.136): icmp_seq=1 ttl=64 time=1.71 ms 64 bytes from server01 (192.168.220.136): icmp_seq=2 ttl=64 time=0.301 ms 64 bytes from server01 (192.168.220.136): icmp_seq=3 ttl=64 time=0.317 ms ^C --- server01 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2250ms rtt min/avg/max/mdev = 0.301/0.777/1.714/0.662 ms
（2） 創建掛載文件夾
[root@client ~]# mkdir /mnt/dht /mnt/afr /mnt/stp /mnt/dht_afr [root@client ~]# ls /mnt/ afr dht dht_afr stp [root@client ~]#
（3） 掛載文件到遠端client
[root@client ~]# df –h // 掛載之前先查看一下硬盤情況
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
18G 1003M 16G 7% /
tmpfs 491M 0 491M 0% /dev/shm
/dev/sda1 477M 52M 400M 12% /boot
[root@client ~]# mount -t glusterfs server01:/dht /mnt/dht // 掛載dht卷到/mnt/dht
[root@client ~]# mount -t glusterfs server01:/afr /mnt/afr // 掛載afr卷到/mnt/afr
[root@client ~]# mount -t glusterfs server01:/stp /mnt/stp // 掛載stp卷到/mnt/stp
[root@client ~]# mount -t glusterfs server01:/dht_afr /mnt/dht_afr // 掛載dht_afr卷到/mnt/dht_afr
[root@client ~]# df –h // 再次查看磁盤大小
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
18G 1003M 16G 7% /
tmpfs 491M 0 491M 0% /dev/shm
/dev/sda1 477M 52M 400M 12% /boot
server01:/dht 69G 4.0G 62G 7% /mnt/dht
server01:/afr 35G 2.0G 31G 7% /mnt/afr
server01:/stp 69G 4.0G 62G 7% /mnt/stp
server01:/dht_afr 69G 4.0G 62G 7% /mnt/dht_afr
[root@client ~]#
（4） 將掛載文件寫入/etc/fstab
[root@client ~]# vi /etc/fstab
最後添加如下內容
server01:/dht /mnt/dht glusterfs defaults,_netdev 0 0
server01:/afr /mnt/afr glusterfs defaults,_netdev 0 0
server01:/stp /mnt/stp glusterfs defaults,_netdev 0 0
server01:/dht_afr /mnt/dht_afr glusterfs defaults,_netdev 0 0
然後我們就可以一個命令掛載四個文件了
[root@client ~]# umount /mnt/dht // 卸載剛才掛載的文件
[root@client ~]# umount /mnt/afr
[root@client ~]# umount /mnt/stp
[root@client ~]# umount /mnt/dht_afr/
[root@client ~]# df –h // 查看一下是否卸載成功
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
18G 1003M 16G 7% /
tmpfs 491M 0 491M 0% /dev/shm
/dev/sda1 477M 52M 400M 12% /boot
[root@client ~]# mount -a // 一鍵掛載所有文件系統
[root@client ~]# dh –f // 查看掛載情況
-bash: dh: command not found
[root@client ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
18G 1003M 16G 7% /
tmpfs 491M 0 491M 0% /dev/shm
/dev/sda1 477M 52M 400M 12% /boot
server01:/dht 69G 4.0G 62G 7% /mnt/dht
server01:/afr 35G 2.0G 31G 7% /mnt/afr
server01:/stp 69G 4.0G 62G 7% /mnt/stp
server01:/dht_afr 69G 4.0G 62G 7% /mnt/dht_afr
[root@client ~]#
（1） client安裝Samba服務器
[root@client ~]# yum install samba samba-client samba-swat –y // 安裝Samba全家桶 [root@client ~]# /etc/init.d/smb status // 查看服務情況 smbd is stopped [root@client ~]# /etc/init.d/smb start // 開啟服務 Starting SMB services: [ OK ] [root@client ~]# chkconfig smb on // 設置開機啟動Samba [root@client ~]# chkconfig --list smb // 查看啟動情況設置 smb 0:off 1:off 2:on 3:on 4:on 5:on 6:off [root@client ~]#
（2） 修改配置文件
[root@client ~]# vi /etc/samba/smb.conf // 編輯配置文件
來到最後一行，添加如下：
[public]
comment = Public for gluster file
path = /mnt // 共享目錄
browseable = yes // 是否可以浏覽
writable = yes // 是否可以寫數據
public = yes // 是否允許非賬戶用戶浏覽
[root@client dht]# chmod 777 /mnt/dht /mnt/afr /mnt/stp /mnt/dht_afr // 為文件夾賦寫權限
[root@client dht]# ls /mnt/
afr dht dht_afr stp
[root@client dht]# ls -l /mnt/
total 56
drwxrwxrwx. 3 root root 8192 Aug 1 01:35 afr
drwxrwxrwx. 4 root root 16384 Aug 1 02:51 dht
drwxrwxrwx. 3 root root 16384 Aug 1 01:51 dht_afr
drwxrwxrwx. 3 root root 8192 Aug 1 01:46 stp
[root@client dht]#
（3） 添加samba用戶
[root@client ~]# adduser smbuser // 添加centos用戶 [root@client ~]# smbpasswd -a smbuser // 將centos用戶添加到samba用戶組中 New SMB password: // 輸入密碼 Retype new SMB password: Added user smbuser. [root@client ~]# smbpasswd -e smbuser // 將samba用戶添加到samba列表中 Enabled user smbuser. [root@client ~]# /etc/init.d/smb restart // 重啟服務 Shutting down SMB services: [ OK ] Starting SMB services: [ OK ] [root@client ~]#
（4） Windows端測試登陸
在計算機最上面中，輸入ip地址，第一次需要輸入賬號：smbuser和密碼，即可進入到共享目錄中。
我們可以看到兩個文件夾，一個smbuser文件夾是我們的centos的用戶目錄，一個public文件夾是我們共享目錄，打開public即可往裡面存入數據。
（1） 需求分析
現在要求一個學校中用到Gluster存儲，並且數據可以用samba服務器共享到Windows目錄下。
條件一：
一個公共共享目錄，這個目錄中，工具區和文件區都同屬於公共區，這個只有超級用戶擁有絕對權限，其他學院管理員擁有對本系文件的讀寫操作，對其他系文件和工具區文件只有浏覽權限。
條件二：
在各個學院中，管理員有對學院文件區域絕對管理權限，學生對自己創建的文件有絕對管理權，其他人對別人的文件和管理員的文件有浏覽權限。
條件三：
學院中的區域只能夠給自己學院的學生和管理員浏覽，其他人只能在共享區才能看到其他學院的文件目錄。在共享區，除了管理員有創建權權限，學生只有浏覽權限
（2） 創建用戶
Tools管理員賬號：superadmin 軟件管理員賬號：softmin 軟件普通帳戶：softuser 經管管理員賬號：economicmin 經管普通用戶：economicuser 教育管理員賬號：educationmin 教育普通用戶：educationuser [root@client /]# useradd -s /sbin/nologin softmin [root@client /]# useradd -g softmin -s /sbin/nologin softuser [root@client /]# useradd -s /sbin/nologin economicmin [root@client /]# useradd -g economicmin -s /sbin/nologin economicuser [root@client /]# useradd -s /sbin/nologin educationmin [root@client /]# useradd -g educationmin -s /sbin/mologin educationuser [root@client /]# useradd -s /sbin/nologin superadmin [root@client /]# smbpasswd -a softmin New SMB password: Retype new SMB password: Added user softmin. [root@client /]# smbpasswd -a softuser New SMB password: Retype new SMB password: Added user softuser. [root@client /]# smbpasswd -a economicmin New SMB password: Retype new SMB password: Added user economicmin. [root@client /]# smbpasswd -a economicuser New SMB password: Retype new SMB password: Added user economicuser. [root@client /]# smbpasswd -a educationmin New SMB password: Retype new SMB password: Added user educationmin. [root@client /]# smbpasswd -a educationuser New SMB password: Retype new SMB password: Added user educationuser. [root@client /]# smbpasswd -a superadmin New SMB password: Retype new SMB password: Added user superadmin. [root@client /]#
（3） 創建文件，實現共享
[root@client /]# mkdir /mnt/dht/School /mnt/dht/School/soft /mnt/dht/School/economic /mnt/dht/School/education /mnt/dht/School/share /mnt/dht/School/share/soft /mnt/dht/School/share/economic /mnt/dht/School/share/education /mnt/dht/School/share/tools // 創建文件夾 [root@client /]# ls -l /mnt/dht/School/ total 64 drwxr-xr-x. 2 root root 16384 Aug 1 04:28 economic drwxr-xr-x. 2 root root 16384 Aug 1 04:28 education drwxr-xr-x. 6 root root 16384 Aug 1 04:28 share drwxr-xr-x. 2 root root 16384 Aug 1 04:28 soft [root@client /]# ls -l /mnt/dht/School/share/ total 64 drwxr-xr-x. 2 root root 16384 Aug 1 04:28 economic drwxr-xr-x. 2 root root 16384 Aug 1 04:28 education drwxr-xr-x. 2 root root 16384 Aug 1 04:28 soft drwxr-xr-x. 2 root root 16384 Aug 1 04:28 tools [root@client /]#
（4） 更改文件權限
[root@client /]# chown softmin.softmin /mnt/dht/School/soft && chown economicmin.economicmin /mnt/dht/School/economic && chown educationmin.educationmin /mnt/dht/School/education && chown superadmin.superadmin /mnt/dht/School/share // 更改用戶的所屬權限 [root@client /]# chown 1775 /mnt/dht/School/soft /mnt/dht/School/economic /mnt/dht/School/education /mnt/dht/School/share // 更改在這個目錄下讀寫權限，不能刪除 [root@client /]# chown -R 0775 /mnt/dht/School/share [root@client /]# chown softmin.softmin /mnt/dht/School/share/soft && chown economicmin.economicmin /mnt/dht/School/share/economic && chown educationmin.educationmin /mnt/dht/School/share/education && chown superadmin.superadmin /mnt/dht/School/share/tools [root@client /]# chown 1775 /mnt/dht/School/share/soft /mnt/dht/School/share/economic /mnt/dht/School/share/education 修改普通用戶在學院的寫權限，即在本學院創建文件自己擁有絕對的權限，其他人除了管理員，不能對其刪除，只能修改 修改各學院管理用戶在學院的寫權限，即在本學院創建文件自己擁有絕對的權限，其他人除了管理員，不能對其刪除，只能修改 [root@client /]# chmod g+w /mnt/dht/School/soft /mnt/dht/School/economic /mnt/dht/School/education /mnt/dht/School/share /mnt/dht/School/share/soft /mnt/dht/School/share/economic /mnt/dht/School/share/education [root@client /]# chmod o+t /mnt/dht/School/soft /mnt/dht/School/economic /mnt/dht/School/education /mnt/dht/School/share /mnt/dht/School/share/soft /mnt/dht/School/share/economic /mnt/dht/School/share/education [root@client /]#
（5） 配置samba文件
[root@client /]# vi /etc/samba/smb.conf // 編輯文件
將這些配置寫入到這個文件末尾：
[soft]
comment = This is a directory of soft college
path = /mnt/dht/School/soft
public = no
admin users = softmin
valid users = @softmin
writable = yes
create mask = 0750
driectory mask = 0750
[economic]
comment = This is a directory of soft economic
path = /mnt/dht/School/economic
public = no
admin users = economic
valid users = @economic
writable = yes
create mask = 0750
driectory mask = 0750
[education]
comment = This is a directory of soft education
path = /mnt/dht/School/education
public = no
admin users = education
valid users = @education
writable = yes
create mask = 0750
driectory mask = 0750
[Share]
comment = This is a share directory.
path = /mnt/dht/School/share
public = no
valid users = superadmin,@softmin,@softmin,@education
writable = yes
create mask = 0755
directory mask = 0755
[root@client /]# /etc/init.d/smb restart // 重啟samba服務器
Shutting down SMB services: [ OK ]
Starting SMB services: [ OK ]
[root@client /]#
（6） 以上實現了文件的權限問題，接下來實現文件大小問題
[root@server01 ~]# gluster volume quota dht limit-usage /School 100MB
limit set on /School
[root@server01 ~]# gluster volume quota dht limit-usage /School/soft 10MB
limit set on /School/soft
[root@server01 ~]# gluster volume quota dht limit-usage /School/economic 10MB
limit set on /School/economic
[root@server01 ~]# gluster volume quota dht limit-usage /School/education 10MB
limit set on /School/education
[root@server01 ~]# gluster volume quota dht limit-usage /School/share 70MB
limit set on /School/share
[root@server01 ~]# gluster volume quota dht list
path limit_set size
----------------------------------------------------------------------------------
/School 100MB 0Bytes
/School/soft 10MB 0Bytes
/School/economic 10MB 0Bytes
/School/education 10MB 0Bytes
/School/share 70MB 0Bytes
[root@server01 ~]#
（7） 測試
Windows鍵+R ，輸入cmd
輸入net use * /del
輸入Y，把網絡掛載刪除掉
Microsoft Windows [版本 6.1.7601]
版權所有 (c) 2009 Microsoft Corporation。保留所有權利。
C:\Users\gluster>net use * /del
您有以下的遠程連接:
\\192.168.220.135\IPC$
繼續運行會取消連接。
您想繼續此操作嗎? (Y/N) [N]: y
命令成功完成。
C:\Users\gluster>net use * /del
列表是空的。
C:\Users\gluster>
在我的電腦中輸入IP地址，然後輸入賬號和密碼，即可看到所有的共享文件夾
進入到soft文件夾下，因為用的是softmin用戶，所以在soft文件夾下可以新建文件夾，可以拷貝文件，最大文件拷貝大小是10MB，多余這個數據就會拷貝失敗。這個用戶無法訪問到其他專業的文件夾，如果點擊需要輸入賬號和密碼。
Android 數據存儲----SQLite
數據庫 SQLiteOracle SQLServer mySql SQLite 關系型數據SQLite 數據庫Android系統中集成了輕量級的數據SQLite一, 特點
[Android] 自定義ViewGroup最佳入門實踐
1.View 繪制流程ViewGroup也是繼承於View，下面看看繪制過程中依次會調用哪些函數。 說明：measure()和onMeasure()在View.Java源
搜索----Android Demo
在前面的博客中，小編簡單的介紹了，點擊發現按鈕，自動加載熱門的相關數據，成長的腳步從不停歇，完成了發現的功能，今天我們來簡單看一下如何在搜索欄中輸入關鍵字，搜索出我們所需
Android 初識 MVC、MVP框架
前言MVC、MVP、MVVP相信大家已經耳熟能詳了，作為Android最出名的三個框架，它們的應用是非常的廣泛。這篇博客就來簡單介紹下其中二種框架。也加強下自己對這方面的
