Shared Storage on the Boot RAID
The SMW HA system shares the following file systems on the boot RAID for data that must be highly available. These shared file systems are mounted only on the active SMW. When a failover occurs, access to these directories is automatically transferred to the other SMW as part of the failover process.
| Device | Mount Point | Description |
|---|---|---|
| /dev/mapper/smw_node_vg-log | /var/opt/cray/disk/1 | Log disk. The following directories symbolically link to the Log disk:
|
| /dev/mapper/smw_node_vg-home | /home | SMW home directories. |
| /dev/mapper/smw_node_vg-db | /var/lib/mysql | Maria DB (MySQL) HSS database. Although the database is shared, the HSS database server runs on the active SMW only. |
| /dev/mapper/smw_node_vg-repos | /var/opt/cray/repos | Location of the SLE, SMW, and CLE RPM repositories. |
| /dev/mapper/smw_node_vg-imps | /var/opt/cray/imps | Location of global and CLE config sets, CLE boot images, and CLE image roots. |
Do not use tune2fs on these xfs and btrfs file systems. Because these file systems are shared between the two SMWs, an SMW HA system has a slightly increased risk for double-mount problems. Do not mount any of these on both SMWs at the same time.