There are some incompatibilities with the following functions compared to 4.2A00:
Number | Item | OS after upgrading |
|---|---|---|
1 | Support of sendfile(2) | RHEL6 |
2 | Change in operation at the time of specifying the mount option atime | RHEL6 |
3 | Change in AC warning messages | RHEL5 |
Note
When the OS before upgrading is RHEL4 or RHEL5, incompatibilities of sendfile(2) occur.
Incompatibility description
Action of sendfile(2) to the GFS Shared File System has been changed.
Before change: Abnormal exit (return code: -1, errno: EINVAL)
After change: Normal exit
Corrective action
None.
Incompatibility description
Operation at the time of specifying the mount option atime has been changed.
Before change:
The last access time of a file is updated for each file access.
After change:
The last access time of a file is updated when the previous last access time is the same as or older than the last modify time or the last change time. Also, when the previous last access time of a file is old for over a day, it is updated.
Corrective action
To execute the operation performed before change, change the mount option which is described in /etc/fstab from atime to strictatime.
Incompatibility description
In AC, the warning message output at the following conditions has been changed.
If the connection with the primary MDS fails
Before migration:
WARNING: sfcfs: 1021: mountpoint: failed to connect to PrimaryMDS: error=error
error: Detailed number of the error
After migration:
WARNING: sfcfs: 1021: mountpoint: failed to connect to PrimaryMDS: error=error IP=ipaddress
error: Detailed number of the error
ipaddress: The IP address where the primary MDS runs.
Corrective action
None.
