Bruce Guenter
2007-Dec-11 22:15 UTC
PROBLEM: Duplicated entries in large NFS shared directory
Hi. I have a large directory (almost 40,000 entries) on an ext3 filesystem that is shared over NFS. I discovered recently when listing the directory on the client, one of the files appears twice. The same file does not appear twice on the server. I did a capture using WireShark, and discovered that the offending file name is being sent twice -- once as the last entry in a readdir reply packet and then again as the first entry in the next readdir reply. If I'm reading the trace right, the readdir call sends the cookie for the last entry in the previous readdir reply and the server responds with the next set of entries. In this case, the server responds with the entry containing the same cookie again. The server is running vanilla 2.6.23.8. I would be happy to provide any further information that would help resolve this bug. I posted this to the NFS maintainers, and Neil Brown suggested:> My guess is that you have lucked-out and got two directory entries > that hash to the same value, and they appear either side of a readdir > block boundary. > > It is an awkward designed limitation of ext3 that is rarely a problem > and could possibly be worked around to some extent...-- Bruce Guenter <bruce at untroubled.org> http://untroubled.org/ -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 189 bytes Desc: not available URL: <http://listman.redhat.com/archives/ext3-users/attachments/20071211/11c37d0e/attachment.sig>