ext3是由开放资源社区开发的日志文件系统,ext3被设计成是ext2的升级版本,ext3在ext2的基础上加入了记录元数据的日志功能,努力保持向前和向后的兼容性。这个文件系统被称为ext2的下一个版本。
ext3fs最大的优点是向下兼容ext2,而且ext3fs还支持异步的日志,这意味着它的性能可能比ext2还好。但是使用ext3文件系统时不支持磁盘限量功能。 red hat从kernel2.4.17-pre8以后支持ext3的磁盘quota,我选择了更为稳定的kernel2.4.18来实现。 <1.源文件> kernel-2.4.18:http://www.kernel.org/pub/Linux/kernel/v2.4/linux-2.4.18.tar.gz quota:FTP://ftp.rpmfind.net/linux/redhat/7.3/en/os/i386/RedHat/RPMS/quota-3.03-1.i386.rpm 把档案放在/home/src下 <2.設定方法> 2-1-2)kernel升级过程: #cd /home/src #mkdir kernel_update #cp ./linux-2.4.18.tar.gz ./kernel_update #cd kernel_update #tar zxvf linux-2.4.18.tar.gz #cd linux #make menUConfig 此时出现Linux Kernel v2.4.18 Configuration的窗口 Processor type and features ---> General setup ---> Memory Technology Devices (MTD) ---> Parallel port support ---> Plug and Play configuration ---> Block devices ---> Multi-device support (RAID and LVM) ---> Networking options ---> Telephony Support ---> ATA/IDE/MFM/RLL support ---> SCSI support ---> Fusion MPT device support ---> I2O device support ---> Network device support ---> Amateur Radio support ---> IrDA (infrared) support ---> ISDN subsystem ---> Old CD-ROM drivers (not SCSI, not IDE) ---> Input core support ---> Character devices ---> Multimedia devices ---> File systems ---> Console drivers ---> Sound ---> USB support ---> Kernel hacking ---> --- Load an Alternate Configuration File Save Configuration to an Alternate File 以下都是kernel里的选项,可以根据server硬件的不同自行选择 与quota有关的设定如下 找到File systems ---> 的字样 (第22行) 按空格键 把第一行的Quota support前打上*号 [*] Quota support Kernel automounter support <*> Kernel automounter version 4 support (also supports v3) < > Reiserfs support Ext3 journalling file system support (EXPERIMENTAL) [*] JBD (ext3) debugging support < > DOS FAT fs support < > Compressed ROM file system support [*] Virtual memory file system support (former shm fs) < > Simple RAM-based file system support <*> ISO 9660 CDROM file system support [ ] Microsoft Joliet CDROM extensions [ ] Transparent decompression extension < > Minix fs support < > FreeVxFS file system support (VERITAS VxFS(TM) compatible) < > NTFS file system support (read only) < > OS/2 HPFS file system support [*] /proc file system support [*] /dev/pts file system for Unix98 PTYs < > ROM file system support <*> Second extended fs support < > System V/Xenix/V7/Coherent file system support < > UDF file system support (read only) < > UFS file system support (read only) Network File Systems ---> 选定以后选择exit退出。
出现以下: ┌──────────────────────────────────────────────────────────┐ │ Do you wish to save your new kernel configuration? │ ├──────────────────────────────────────────────────────────┤ │ < Yes > < No > │ └──────────────────────────────────────────────────────────┘ 选择yes 然后出现以下字样: Saving your kernel configuration... *** End of Linux kernel configuration. *** Check the top-level Makefile for additional configuration. *** Next, you must run 'make dep'. 2-1-2)编译kernel #make dep #make clean #make bzImage #make modules #make modules_install 2-1-3)cp新的kernel到启动区 #cp /home/src/kernel_update/linux/arch/i386/boot/bzImage /boot/vmlinuz-2.4.18 #mkinitrd /boot/initrd-2.4.18.img 2.4.18 #vi /etc/lilo.conf 在最后添加以下 image=/boot/vmlinuz-2.4.18 <= kernel的路径 label=newkernel <= 启动时的卷标 initrd=/boot/initrd-2.4.18.img <= kernelimg的路径 read-only root=/dev/hda2 <= / 所在的区 #/sbin/lilo -m /boot/map 2-1-4)重新启动server #reboot 重新启动进入时在redhat lilo的选择界面选择newkernel进入 2-2)设定quota 2-2-1)安装quota。 #cd /home/src #rpm -ivv quota-3.03-1.i386.rpm 2-2-2)设定quota,以home为例 #vi /etc/fstab 把 LABEL=/home /home ext3 defaults 1 2 改成 LABEL=/home /home ext3 defaults,usrquota,grpquota 1 2 重启server #/sbin/reboot 2-2-3)设定用户限定 #quotacheck -uvg /home #edquota -u test Disk quotas for user chenc (uid 694): Filesystem blocks soft hard inodes soft hard /dev/hda5 6000 5000 6000 3 5000 6000 在soft和hard下添上需要限制的磁盘大小(单位是K) #edquota -t Grace period before enforcing soft limits for users: Time units may be: days, hours, minutes, or seconds Filesystem Block grace period Inode grace period /dev/hda5 1minutes 1minutes 设定soft quota和hard quota之间的时间。 启动quota #quotaon -av <3、测试> 用test帐号用ftp进行测试,当test目录达到了5M时,提示Disk quota exceeded.
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