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A little disk I/O tuning and benchmarking.
For applications that are disk intensive, we recommend that systems administrators configure their FreeBSD system to use the async option (or use soft updates for more reliability). Our hard disk benchmark was 3.8 times faster with the asynchronous FreeBSD file system, and its performance was in line with Windows 2000 and Linux (slightly faster at times, and slightly slower at other times, depending on the file size). In our real-world MailEngine test, we found that a tuned version of FreeBSD was as fast as an untuned version of Linux, for connection levels of 1500 sends or fewer, with FreeBSD performance declining steadily at simultaneous connection levels above 1500.
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