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RHELAS4U4下,1个CLS,1个MDS,4个OST, 安装的是Lustre1.6集群,并且1个CLS,4个OST已经挂载上去. CLS把1个2.5G的文件写入到了4个OST上.
现在,如果1台OST失效,该文件能否正常读写呢?
看LUSTRE官方安装手册(LustreManual_1.6_v16_UploadedToWebsite.pdf) 上面的86页末尾
OST
File system: RAID5 with 6 disks, each from a different controller.
External journal: RAID1 with two partitions of 400 MB (or more), each from disks on different
controllers.
$ --mkfsoptions "-j -J device=/dev/mdX"
To enable an external journal, you can use the above options in the lmc script used to create yourXML. mdX is the external journal device.
Before running --reformat, set up the journal device (/dev/mdX), run:
$ 'mke2fs -O journal_dev -b 4096 /dev/mdX'
不太明白呢?请问各位LUSTRE的OST是怎么实现的RAID5啊? |
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