Wandering Thoughts archives

2012-10-31: Our DTrace scripts for NFS server, ZFS, and iSCSI initiator monitoring
Some stats and notes on relay attempts for our external mail gateway
2012-10-30: How I am doing randomized read IO to avoid ZFS prefetching
2012-10-29: How ZFS file prefetching seems to work
2012-10-28: Some unusual SMTP activity from would-be spammers
2012-10-27: The difference between cryptographic and normal random number generators
2012-10-26: Thinking about an unusual sequence
2012-10-25: Always make sure you really understand what your problem is
2012-10-24: Why you should support 'reload' as well as 'restart'
2012-10-23: The problem of simulating random IO
2012-10-22: Why parsers matter
2012-10-21: Why fork() is a good API
2012-10-20: The issue with measuring disk performance through streaming IO
2012-10-19: An old Unix trick for saving databases
2012-10-18: A danger of default values for function arguments (in illustrated form)
2012-10-17: Operators and system programmers: a bit of System Administrator history
2012-10-16: Switch flow control and buffering: what we think was wrong in our iSCSI network
2012-10-15: The anatomy of a performance problem with our mail spool
2012-10-14: DTrace: two mistakes you can make in DTrace scripts
2012-10-13: DTrace: counting, aggregates, and a nice undocumented printa() feature
2012-10-12: SSL CAs have an impossible job (if you want them to be thorough)
2012-10-11: Controlling Linux TCP socket send buffer sizes
2012-10-10: Disk IO latency is often what matters
2012-10-09: The negative results problem with search engines
2012-10-08: Acclimatization makes competition in web search engines hard(er)
2012-10-06: Python can execute zip files
How averages mislead you
2012-10-05: Notes on Linux's blktrace
2012-10-04: Averages mislead: an illustrated example
2012-10-03: DTrace: notes on quantization and aggregates
2012-10-02: Some notes on getting durations in DTrace

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