Veritas Storage Foundation 5.1 SP1 Cluster File System Release Notes (5900-1509, April 2011)

VxFS read ahead can cause stalled I/O on all write operations
(1965647)
Changing the read_ahead parameter can lead to frozen I/O. Under heavy load,
the system can take several minutes to recover from this state.
Workaround: There is no workaround for this issue.
Shrinking a file system that is larger than 1 TB takes a long
time (2097673)
Shrinking a file system shrink via either the fsadm command or vxresize
command can take a long time to complete in some cases, such as if the shrink
size is large and some large extent of a file is overlapping with the area to be
shrunk.
Workaround: One possible workaround is to use the vxtunefs command and set
write_pref_io and write_nstream to high values, such that write_pref_io
multiplied by write_nstream is around 8 MB.
Storage Checkpoints can exceed the quota limit (2102201)
Under some circumstances, Storage Checkpoints can exceed the quota limit set
by the fsckptadm setquotalimit command. This issue can arise if all of the
following conditions are met:
■ The Storage Checkpoint quota has been enabled.
■ The Storage Checkpoint quota is not exceeded.
■ A file content modification operation, including removing a file, needs to push
some or all blocks of the file to the Storage Checkpoint.
■ Number of blocks that need to be pushed to the Storage Checkpoint is enough
to exceed Storage Checkpoint quota hard limit.
Workaround: There is no workaround for this issue.
vxfsconvert can only convert file systems that are less than 1
TB (2108929)
The vxfsconvert command can only convert file systems that are less than 1 TB.
If the file system is greater than 1 TB, the vxfsconvert command fails with the
"Out of Buffer cache" error.
Storage Foundation Cluster File System Release Notes
Known issues
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