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[expand - 1 more] - Re: On coprocessor API evolution - HBase - [mail # dev]
...On Mon, May 19, 2014 at 12:05 PM, Vladimir Rodionovwrote:And even in native code, shared memory for communication between untrustedpeers can be pretty tricky to do securely (readhttp://lwn.n...
   Author: Todd Lipcon, 2014-05-19, 22:38
Re: [VOTE] The 1st HBase 0.98.2 release candidate (RC0) is available - HBase - [mail # dev]
...Hey Andrew,Sorry for the late email here, but -- I believe releases need at leastthree +1 votes from PMC members[1]. Perhaps people were a bit busy lastweek due to HBaseCon and we should ext...
   Author: Todd Lipcon, 2014-05-12, 14:45
[HBASE-2597] Use "Builder" pattern instead of many-argument constructors - HBase - [issue]
...We've got a lot of objects that have a ton of different constructors with a huge number of parameters. Whenever we add a new parameter, existing callers break, and it's sometimes difficult t...
http://issues.apache.org/jira/browse/HBASE-2597    Author: Todd Lipcon, 2014-05-12, 01:39
[expand - 1 more] - Re: Behavior change in Access Controller between 0.94 and 0.98 - HBase - [mail # dev]
...Does this leave us open to leaking row existence due to timing differences?For example, imagine you had a table where I happened to know (eg fromreading your design docs on the wiki) that th...
   Author: Todd Lipcon, 2014-04-24, 17:05
[HBASE-4391] Add ability to start RS as root and call mlockall - HBase - [issue]
...A common issue we've seen in practice is that users oversubscribe their region servers with too many MR tasks, etc. As soon as the machine starts swapping, the RS grinds to a halt, loses ZK ...
http://issues.apache.org/jira/browse/HBASE-4391    Author: Todd Lipcon, 2014-04-24, 16:56
[expand - 1 more] - Re: HBase region server failure issues - HBase - [mail # dev]
...On the other hand, 95% of HBase users don't actually configure HDFS tofsync() every edit. Given that, the random writes aren't actually going tocause one seek per write -- they'll get buffer...
   Author: Todd Lipcon, 2014-04-15, 01:21
[expand - 1 more] - Re: blockcache 101 - HBase - [mail # dev]
...Another quick question: the trend lines drawn on the graphs seem to bebased on some assumption that there is an exponential scaling pattern. Inpractice I would think it would be sigmoid -- w...
   Author: Todd Lipcon, 2014-04-05, 21:26
[HBASE-4012] Further optimize byte comparison methods - HBase - [issue]
...Guava uses some clever tricks with sun.misc.Unsafe to compare byte arrays about 100% faster than the naive byte-by-byte implementation: http://guava-libraries.googlecode.com/svn/trunk/guava/...
http://issues.apache.org/jira/browse/HBASE-4012    Author: Todd Lipcon, 2014-03-17, 21:14
[HBASE-3484] Replace memstore's ConcurrentSkipListMap with our own implementation - HBase - [issue]
...By copy-pasting ConcurrentSkipListMap into HBase we can make two improvements to it for our use case in MemStore: add an iterator.replace() method which should allow us to do upsert much mor...
http://issues.apache.org/jira/browse/HBASE-3484    Author: Todd Lipcon, 2014-03-10, 15:35
Re: DISCUSS: We need a mascot, a totem HBASE-4920 - HBase - [mail # dev]
...On Tue, Mar 4, 2014 at 11:44 AM, Stack  wrote:That's nonsense! Orcas are not fish!Nonsensically-ToddTodd LipconSoftware Engineer, Cloudera ...
   Author: Todd Lipcon, 2014-03-04, 20:01
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elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB