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manual abstract
PolyServe Release Notes
6
it is necessary to reset the timeout, change your scripts to use mx
nfsprobe.
This release includes fixes for the following problems:
• Defect 9167. Under certain conditions, the MxFS-Linux NFS server
could reject a file handle from a client as “stale” even though the file
handle was valid. The conditions related to cached inode management
within the exported PSFS filesystem. The filesystem now properly
handles the inode cache for files accessed through NFS.
• Defect 14832. Some NFS locking clients issue an unlock for all possible
bytes when closing a file, while other clients issue an unlock for each
specific range of locked bytes. Previously, the MxFS-Linux service did
not properly handle the first type of unlock-on-close. MxFS-Linux
now cancels pending lock requests when it receives an unlock for all
possible bytes, even if no pending request exactly matches the unlock
range.
• Defect 15097. File locking operations could hang on NFS clients that
perform strict source checking on their lock reply packets.
• Defect 15191. Under conditions of heavy load, nfsd could incorrectly
close TCP port 2049 and stop responding to all TCP-based requests.
No such issue existed for UDP port 2049.
• Defect 15211. The Export Group device monitor closed an RPC socket
that had already been closed by the operating system, which caused
errors such as “Bad file descriptor,” “RPC: unable to send,” and “RPC:
unable to receive.”
• Defect 15265. Directory read operations over NFS could cause internal
deadlocks in the exported PSFS filesystem. This would affect not only
the NFS clients, but any other processes trying to access the relevant
directory. In some cases, the entire filesystem could be affected. The
locking order has been changed to prevent such deadlocks.
• Defect 15272, 15791. MxFS-Linux probes the NFS service periodically
to monitor its status. Previously, RPC timeouts were treated as service
failures. This allowed temporary resource congestion to trigger
failovers of Virtual NFS Services to other server nodes. RPC timeouts
Copyright © 1999-2007 PolyServe, Inc. All rights reserved.
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