asia trip 2/4 – singapore
after 10 days in Hong Kong my next stop was Singapore. i had 2.5days to use for some meetings and sightseeing.
asia trip 1/4 – hong kong
i’ve spent last month in Asia – Hong Kong, Singapore, Thailand and Philippines. totally new experience in many ways.
Benford’s law
by a coincidence [process well described in this xkcd’s comics] i’ve stumbled on the definition of Benford’s law. since i have access to quite a lot of different economic & financial data i’ve decided to check if that law applies also to it.
morocco
in search for some February sunshine i’ve spent 11 days in Morocco.
cloning the server using rsync
braindump of things to do/directories not to copy when cloning physical debian to a vm using rsync
sopa/pipa/acta
while sopa/pipa legislation in the US seems to be postponed after a wave of protests acta in EU/Poland is doing just fine; acta possibly will be ratified [at least in Poland] without much of the mainstream attention. is pushing this law through the EU parliament going to be the only ‘success’ of otherwise pathetic polish ... Read More
switching reverse proxy from apache2 to nginx
i’ve been planning for a while to move away from apache2 as a reverse proxy in front of java appservs and start using nginx. i had two reasons: nginx can handle much better large number of concurrent connections [something we can make use of if we start using long-poll/comet], nginx gives more control over buffering ... Read More
java7, XMLEncoder problems
for the last few days i’ve been looking into java7… it surely seems faster. but also some of my old code broke when run under it.
ghettovcb hangs while removing the snapshot
i’ve upgraded few vmware esxi 4.1 servers with the latest patches and… obviously something got broken. i use ghettoVCB script to take weekly snapshots of the vms. scripts hanged last night on all servers.
istanbul
i was in istanbul / turkey for 9 days… longest ‘stationary’ holidays in the last couple of years.
croatia / bosnia & herzegovina / serbia
brain-dump from few days of backpacking around ex-yougoslavia
kiev
i’ve spent 3 days in kiev…
kindle 3g
few months ago i bought kindle 3g. below what’s good and what’s bad about it.
“boot failed: not a bootable disk” after migrating kvm image
i’ve migrated some vm from qemu-kvm-0.12.4 to qemu-kvm-0.12.5 and … got unpleasant surprise – unbootable machine.
mysql 5.1 – turning on/off query logging on the fly
i dont run query logging – more to avoid running out of the disk space on /var/log than for the performance reasons. but from time to time it’s good to be able to turn logging on to see what’s going on. in 5.1 and later versions it’s possible without restarting the mysqld.
mysql circular / master-master replication
i’ve been playing for a while with mysql circular replication; here are some notes from setting it up.
vlans over bridged interface
the lenny/squeeze way.
mysql connector/j 5.1.16 + sphinxql 0.9.9 = MySQLNonTransientConnectionException
most recent connector/j – 5.1.16 does not seem to work with sphinx search 0.9.9. i did not find [yet] actual cause of the problem but going back to 5.1.15 solved the problem for now.
innodb_stats_sample_pages to save a day
i’ve run into nasty instability in mysql’s query execution plan joining few tables with 10s of millions of rows. mysql 5.1’s innodb_stats_sample_pages seem to solve the problem.
[pl] asmax ar 901 + netia dsl z 8 publicznymi adresami ip
pare informacji o tym jak skonfigurowac publiczna podsiec /29 na routerze netii asmax ar-901.