When mount is returning:
STDERR: mount: block device /srv/database-data/postgres is write-protected, mounting read-only
mount: cannot mount block device /srv/database-data/postgres read-only
and dmesg shows:
(function( $ ) { | |
$.fn.simulateDragDrop = function(options) { | |
return this.each(function() { | |
new $.simulateDragDrop(this, options); | |
}); | |
}; | |
$.simulateDragDrop = function(elem, options) { | |
this.options = options; | |
this.simulateEvent(elem, options); | |
}; |
Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
boost::asio::io_service io_service; | |
boost::asio::deadline_timer timer(io_service); |
#!/usr/bin/env python | |
# | |
# Very basic example of using Python and IMAP to iterate over emails in a | |
# gmail folder/label. This code is released into the public domain. | |
# | |
# RKI July 2013 | |
# http://www.voidynullness.net/blog/2013/07/25/gmail-email-with-python-via-imap/ | |
# | |
import sys | |
import imaplib |
import csv | |
sniff_range = 4096 | |
delimiters = ';\t,' | |
infile_name = 'blabla.csv' | |
sniffer = csv.Sniffer() | |
print 'Reading file: %s' % infile_name |
""" | |
Physics simulation with PyODE followed by a (basic) rendering with Vapory | |
See the result here: http://i.imgur.com/TdhxwGz.gifv | |
Zulko 2014 | |
This script is placed in the Public Domain (Licence Creative Commons 0) | |
""" |
from ijson import common | |
from ijson.backends import YAJLImportError | |
from cffi import FFI | |
ffi = FFI() | |
ffi.cdef(""" | |
typedef void * (*yajl_malloc_func)(void *ctx, size_t sz); | |
typedef void (*yajl_free_func)(void *ctx, void * ptr); | |
typedef void * (*yajl_realloc_func)(void *ctx, void * ptr, size_t sz); |
;;==============Tiny framework of Actor-model========================= | |
(use-modules (ice-9 control) (ice-9 match) (ice-9 q)) | |
(define *mailbox* (make-hash-table)) | |
(define *task-queue* (make-q)) | |
(define (gen-pid n) (gensym (format #f "actor-~a-" n))) | |
(define-syntax-rule (! pid msg) | |
(let ((mq (hashq-ref *mailbox* pid))) | |
(if mq |
#!/usr/bin/env python | |
# -*- coding: utf-8 -*- | |
from sqlsoup import SQLSoup as sql | |
from sys import argv | |
DIGRAPH = """digraph structs { | |
graph [ | |
rankdir= "LR" | |
bgcolor=white | |
] |