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vi /etc/exports
/nfs 10.10.14.0/24(rw,async,no_subtree_check,no_root_squash)
exportfs -a
The text was updated successfully, but these errors were encountered:
https://blog.zufardhiyaulhaq.com/kubernetes-dynamic-volume-provisioning-with-ceph-rbd/
ceph volume provisioner
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字符设备/原始设备:程序只能读写对齐的块而不能直接读单个字符 块设备:提供缓存,程序可以读任意大小的块(包括单个字符)
Linux下可以通过O_DIRECT flag打开块设备取得相当于打开字符设备的效果
O_DIRECT
ref:https://en.wikipedia.org/wiki/Device_file#Block_devices
块设备 也叫做块特殊文件,它的行为通常与普通文件相似:它们是字节数组,并且在给定位置读取的值是最后写入该位置的值。来自块设备的数据可以缓存在内存中,并从缓存中读取;写入可以被缓冲。块设备通常是可搜索的,块设备的概念是,相应的硬件可以一次读取或者写入整个块,例如磁盘上的一个扇区
字符设备 也称为字符特殊文件,它的行为类似于管道、串行端口。将字节写入字符设备可能会导致它在屏幕上显示,在串行端口上输出,转换为声音。
https://zhuanlan.zhihu.com/p/69997558
ceph 块设备、文件系统、对象存储
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vi /etc/exports
/nfs 10.10.14.0/24(rw,async,no_subtree_check,no_root_squash)
exportfs -a
The text was updated successfully, but these errors were encountered: