rbranson

=*= MySQL Group Replication =*=
===============================

The multi master plugin for MySQL is here. MySQL Group Replication
ensures virtual synchronous updates on any node in a group of MySQL
servers, with conflict handling and failure detection. Distributed
recovery is also in the package to ease the process of adding new
nodes to your server group.

rbranson

Rust is the first language that has emerged in the past few years that solves enough of my problems that it would be worth not only learning & teaching an entirely new language, but also sacrificing the maturity of the language ecosystems I’ve become accustomed to.

I highly suggest you read the "Guide" provided by the language developers or this won't make much sense. These are just some of my thoughts and are intended to highlight particular things that stand out to me. I am just a practitioner and not an expert in any of these languages, so I have probably made some incorrect assumptions and out-of-date assertions. Bare with me.

Rust feels like the first time momentum has gained behind a true systems programming language that uses modern PL design techniques to prevent common errors when dealing with memory. It seems like others have previously either been too anemic to be worth adopting or too abstract to provide proper control. The type system and assignment semantics are designed specifically to preven

rbranson

    public void antiCleanup(String ksName, String cfName)
    {
        if (ksName.equals(Table.SYSTEM_KS))
            throw new RuntimeException("Anti-cleanup of the system table is neither necessary nor wise");

        Set<String> tableNames = Sets.newHashSet();
        if (ksName == null)
        {
            for (Table table : Table.all())
                tableNames.add(table.name);

rbranson

=== 1000 columns, 1 byte values, name query for 1 column ====

 activity                                                                                    | timestamp    | source    | source_elapsed
---------------------------------------------------------------------------------------------+--------------+-----------+----------------
                                                                          execute_cql3_query | 15:50:29,993 | 127.0.0.1 |              0
 Parsing select * from "ColumnPerfTest" where key = 826312 and column1 = 222970 LIMIT 10000; | 15:50:29,993 | 127.0.0.1 |             55
                                                                          Peparing statement | 15:50:29,994 | 127.0.0.1 |            423
                                          Executing single-partition query on ColumnPerfTest | 15:50:29,994 | 127.0.0.1 |            920
                                                                Acquiring sstable references | 15:50:29,994 | 127.0.0.1 |            936
 

rbranson

import gevent

from gevent import httplib

def fetcher():
    print "fetcher: Fetching..."
    conn = httplib.HTTPConnection("www.google.com")
    conn.request("GET", "/")
    res = conn.getresponse()
    output = res.read()

rbranson

[default@inbox] get LegacyMediaToUserMap[1][64567];
=> (name=64567, value=1043, timestamp=1377731866330548)
Elapsed time: 7.65 msec(s).
[default@inbox] get LegacyMediaToUserMap[1][64567];
=> (name=64567, value=1043, timestamp=1377731866330548)
Elapsed time: 5.89 msec(s).
[default@inbox] get LegacyMediaToUserMap[1][64567];
=> (name=64567, value=1043, timestamp=1377731866330548)
Elapsed time: 6.37 msec(s).
[default@inbox] count LegacyMediaToUserMap[1];

rbranson

#!/usr/bin/env python

import math
import random

from collections import defaultdict
from operator import itemgetter


def average(ary):

rbranson

[09:46:29] <canyouhelpme> i want to go with cassandra I HATE MYSQL
[09:46:51] <rcoli> if you hate mysql, you're really going to hate cassandra.
[09:47:23] <canyouhelpme> really?
[09:48:00] <rcoli> yes, really. mysql is much more robust, mature and comprehensible than cassandra, in general.

rbranson

# Cassandra storage config YAML

# NOTE:
#   See http://wiki.apache.org/cassandra/StorageConfiguration for
#   full explanations of configuration directives
# /NOTE

# The name of the cluster. This is mainly used to prevent machines in
# one logical cluster from joining another.
cluster_name: XXX

rbranson

#!/usr/bin/env python
 
import byteplay
import __builtin__
 
class Foo(object):
    def a_global(self):
        return True
 
    def a_const(self):