*逻辑卷(Logical Volume,LV):虚拟分区,由物理区域(physical extents)组成,逻辑卷建立在卷组VG之上。在逻辑卷LV之上可以建立文件系统(比如/home或者/usr等)。
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set of continuous physical extents 连续实体延伸区集
Describes the physical extents participating in a storage redundancy group.
描述参与一个存储复制组的物理范围。
Once new disks have been added, you then can add these new physical volumes to your volume group(s) to create a fresh supply of extents.
添加了新磁盘后,可以将这些新的物理卷添加到卷组中来创建新的范围补给。
The operations that may take longer with short extents include: finding extents, mapping logical to physical addresses, light scans, archives, read-ahead, and checkpoint flush.
可能由于短区段而增加操作时间的操作包括:查找区段、逻辑地址到物理地址的映射、轻量扫描、存档、预读、以及检查点刷新。
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