由于 LUN 上的延迟较长,备份速度较慢
适用场景
- SAN
- ONTAP 9
- Red Hat Enterprise Linux (RHEL) 6.7
问题描述
- 备份期间, LUN 上的延迟显示为峰值,达到 50 毫秒。
- 一个节点上的卷 /LUN 由其配对节点访问
multipath -ll
从 Linux 主机显示硬件处理程序为 "0" , 并且路径不 按优先级分组
[root@linux ~]# multipath -ll
mpathaf (3600a09803831457544245248xxxxxxxx) dm-8 NETAPP,LUN C-Mode
size=500G features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=1 status=active
| `- 12:0:0:8 sdh 8:112 active ready running
|-+- policy='round-robin 0' prio=1 status=enabled
| `- 12:0:1:8 sdo 8:224 active ready running
|-+- policy='round-robin 0' prio=1 status=enabled
| `- 12:0:2:8 sdv 65:80 active ready running
`-+- policy='round-robin 0' prio=1 status=enabled
`- 12:0:3:8 sdac 65:192 active ready running