5.6.3 HP IBRIX X9000 Release Notes (AW549-96043, December 2012)

The 5.6.2 release provided the following implementation changes:
• The default port for the X9000 SNMP agent has been changed from 161 to 5061.
• The df command (and similar tools) report size and usage for a directory based on the quota
limits set on that directory. To disable file system reporting based on directory tree quota limits,
use the ibrix_mount –o noquotstatfs option when you mount the file.
Fixes
Corrected in 5.6.3
The following fixes were made in this release:
• The error init_special_inode: bogus i_mode(0) was reported when applications created
and deleted files repeatedly, causing issues with the application.
• CIFS clients running Windows XP Service Pack 3 could not save a file with a Danish character in
the filename.
• The CIFS service failed when a large number of CIFS clients were connected concurrently for
read/writes.
• The NIC monitor failed with a segmentation fault.
• Servers becoming unresponsive during connection/delegation recovery. The problem occurred
during connection/delegation recovery on servers especially within a large IBRIX cluster.
• An lwiod failure caused the CIFS service to stop. This issue has been resolved.
• If the quotamonitor service could not access a server, the service issued an error and did not
obtain other quota information.
• The "ibrix_auth -t -S <sharename> ..." command was failing with the output
(LW_ERROR_DATA_ERROR). The cached data is incorrect whenever it encountered
an unprovisioned user in Active Directory.
Users can run the "ibrix_auth -t -S <sharename> ..." command successfully.
• When segments reached 70–80% of capacity, clients were unable to write to a CIFS share.
• The quota current size would be reduced after running the rebalance task, even though files were
not modified or deleted. During movement of files across segments, there are intermediate replica
files that are created. Once data from an original file is synced with its replica, the original file
is deleted and replica is promoted as the original file. These replicas have to be marked with the
directory quota ID same as that of the original master file, but that was not occurring. As the
original file is deleted post replication, the directory quota accounted for it gets decremented.
Since the newly created file was not marked with the directory quota ID, it was never accounted
for. As a result, a reduction in quota usage was shown post replication.
The fix was to mark the replica created with the quota ID same as that of the original file, so any
data written into this file is accounted for against the set quota ID.
• Data tiering could result in zero length files.
• CIFS shares were inaccessible, and the Windows client accessing the filesystem using CIFS would
be shown the message: The specified server cannot perform the requested
operation. The cause was an SMB 2.0 credit exhaustion issue that was seen on applying a
specific load pattern for a prolonged period of time on an HP-SMB server. The fix addresses the
credit leak that was a result of corruption in the inherent data structure implementation.
• There were too many clients registering for DCN (Directory Change Notification) and the
notification queue would get overloaded, leading to an ASSERT resulting in a segmentation fault
of the Lwiod daemon. The fix adds proper handling of the overload situation, thereby avoiding
the ASSERT.
Fixes 5