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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By day for October 2012: 2 3 4 5 6 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31; before October; after October.