Perry Taylor wrote:
I've heard some discussions in the past regarding limiting the number of files per directory to help OPEN performance. Does anyone have any real-world experience on what a reasonable limit might be on a *nix file system?
Thanks.
Perry Taylor Zirmed, Inc.
This depends on the underlying filesystem type. My experience is with Linux.
With ext2/ext3 you should try to keep the numbers to the low 10K range at most. Even this might be high for purists, but at least the machine is not totally in the mud.
With reiser the limit is much much higher. I have run directories with >1M files and it scales well (these are not U2 files, but actually a mailserver store). I have one customer who creates all files as DIR type. They have files with >500K items. Fortunately, they run on reiser so don't really notice. Not exactly what a "database" was intended for.
Other platforms may have different rules.
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