datamafia

#!/usr/bin/env python
# marc-w.com
# Built and tested on Django 1.5

class BulkInsertManager(models.Manager):
    
    def _bulk_insert_ignore(self, create_fields, values, print_sql=False):
        '''
        Bulk insert/ignore
        @param create_fields : list, required, fields for the insert field declaration

awidegreen

Introduction

• C-a == Ctrl-a
• M-a == Alt-a

General

:q        close
:w        write/saves
:wa[!]    write/save all windows [force]
:wq       write/save and close

jboner

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