jm + patches   6

[Changelog] Republic of Ireland Patch notes for version : ireland
Hello and welcome, I’m Leo Varadkar, lead developer of the MMO “Republic of Ireland”, which currently has 4,700,000+ players, and today we’ll be discussing changes coming eventually with the new patch.

-- genius
changelog  funny  mmo  gaming  ireland  patches  comedy 
29 days ago by jm
[net-next,14/14] tcp_bbr: add BBR congestion control
This commit implements a new TCP congestion control algorithm: BBR
(Bottleneck Bandwidth and RTT). A detailed description of BBR will be
published in ACM Queue, Vol. 14 No. 5, September-October 2016, as
"BBR: Congestion-Based Congestion Control".

BBR has significantly increased throughput and reduced latency for
connections on Google's internal backbone networks and and
YouTube Web servers.

BBR requires only changes on the sender side, not in the network or
the receiver side. Thus it can be incrementally deployed on today's
Internet, or in datacenters. [....]

Signed-off-by: Van Jacobson <>
google  linux  tcp  ip  congestion-control  bufferbloat  patches  algorithms  rtt  bandwidth  youtube  via:bradfitz 
september 2016 by jm
[LUCENE-6917] Deprecate and rename NumericField/RangeQuery to LegacyNumeric - ASF JIRA
Interesting performance-related tweak going into Lucene -- based on the Bkd-Tree I think: . Being used for all numeric index types, not just multidimensional ones?
lucene  performance  algorithms  patches  bkd-trees  geodata  numeric  indexing 
december 2015 by jm
Basho LevelDB supports tiered storage
Tiered storage is turning out to be a pretty practical trick to take advantage of SSDs:
The justification for two types/speeds of storage arrays is simple. leveldb is extremely write intensive in its lower levels. The write intensity drops off as the level number increases. Similarly, current and frequently updated data tends to be in lower levels while archival data tends to be in higher levels. These leveldb characteristics create a desire to have faster, more expensive storage arrays for the high intensity lower levels. This branch allows the high intensity lower levels to be on expensive storage arrays while slower, less expensive storage arrays to hold the higher level data to reduce costs.
caching  tiered-storage  storage  ssds  ebs  leveldb  basho  patches  riak  iops 
april 2014 by jm
[#HADOOP-9448] Reimplement things - ASF JIRA
Pretty good April Fools from this year -- a patch to delete the entirety of Hadoop's codebase:
To avoid any bias to the existing code and make the same mistakes we should just delete trunk completely. Attached it is a script that deletes everything.
hadoop  april-fools  asf  patches  open-source  oss 
april 2013 by jm
Improving Linux performance by preserving Buffer Cache State
handy -- a patch to rsync(1) which will not disturb the buffer cache, so that large file transfers and backups will not interfere with what's been cached previously
performance  linux  caching  buffer-cache  rsync  io  cache  patches  backups  from delicious
march 2011 by jm

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