dave linthicum

XFS: The future of Linux file systems in Big data environments? XFS developer Dave Chinner recently claimed that he believes more users should consider XFS. XFS is often considered to be a file system for users with huge amounts of data, and the scalability of space allocation is "several orders of magnitude" faster than EXT4. Metadata validation means that metadata is self-describing, protecting the file system from being written in the wrong directi

various types, such as numeric, polymorphic, and lexical casts, by Dave Abrahams and kevlin Henney. CRC-cyclic Residual code, by daryle Walker. Date_time-date-time library by Jeff Garland. Dynamic_bitset-STD: bitsetBy Jeremy siek and Chuck Allison. Optional inclusion of the enable_if-function template during reload, author Jaakko järvi, Jeremiah Willcock, and Andrew lumsdaine. Filesystem-easy operation of file paths, access directories Through i

I. Question 1 The following error is found in the Alert Log for RAC Standby: Success: diskgroup data was mounted Error: Failed toestablish dependency between database dave_st and diskgroup resourceora. Data. DG Success: diskgroup FRA was mounted Error: Failed toestablish dependency between database dave_st and diskgroup resource ora. FRA. DG The database instance name was originally Dave. Because it was made into RAC standby, db_unique_name of the d

python2.4, the List.sort () and sorted () functions add a key parameter to specify a function that will be called before each element is compared. For example, the case of a string is ignored by a function specified by key:Copy CodeThe code is as follows:>>> sorted ("This was a test string from Andrew". Split (), Key=str.lower)[' A ', ' Andrew ', ' from ', ' was ', ' string ', ' test ', ' this ']The value of the key parameter is a function that has only one parameter and returns a value to be u

process (es ). 2.1.3 log location of the TRACE file The two trace files are in the BACKGROUND_DUMP_DEST directory: Master Process trace file: Worker Process trace file: There is also a directory in USER_DUMP_DEST: Shadow Processtrace file: [Oracle @ asm u01] $ orzparam background Session altered. NAME ISDEFAULT SESMO SYSMOD VALUE -------------------------------------------------------------------------------------- Background_core_dump true false partial Background_dump_dest true false

Do you have a dream on April 9, September 25, 2014, and dream on April 9, 2014 Chapter 1 chicken soup -- If you can do what youdo best and be happy, you're further along in life than most people. As long as you can do your job well and make yourself happy, you will be ahead of most people. There was a kind of chicken soup called the soul. One day, dave also wrote a lot of chicken soup, and then deleted them from the blog one day. Coincidental

/function Starting with python2.4, the List.sort () and sorted () functions add a key parameter to specify a function that will be called before each element is compared. For example, the case of a string is ignored by a function specified by key:Copy the Code code as follows: >>> sorted ("This was a test string from Andrew". Split (), Key=str.lower) [' A ', ' Andrew ', ' from ', ' was ', ' string ', ' test ', ' this '] The value of the key parameter is a function that has only one parameter a

defined in the list. On the contrary, the sorted () method is effective for all iteratable sequences. The code is as follows: >>>Sorted ({1: 'D', 2: 'B', 3: 'B', 4: 'e', 5: 'A '})[1, 2, 3, 4, 5] 2) key parameters/functions Starting from python2.4, the list. sort () and sorted () functions add the key parameter to specify a function, which will be called before each element comparison. For example, you can use the function specified by the key to ignore the case sensitivity of the string: Th

SFTP and FTP are different protocols, SFTP is an SSH-contained protocol, and as long as the sshd server is started, it is available, and it does not require an FTP server to start itself. 1. View OpenSSH software version, want to SFTP service users can only access a specific file directory, version requires more than 4.8 The code is as follows: [Root@localhost ftp]# Rpm-qa | grep OpenSSH Openssh-server-5.3p1-81.el6_3.x86_64 Openssh-5.3p1-81.el6_3.x86_64 Openssh-clients-5.3p1-81.el6_3.x86_6

SFTP and FTP are different protocols, SFTP is an SSH-contained protocol, and as long as the sshd server is started, it is available, and it does not require an FTP server to start itself. 1. View OpenSSH software version, want to SFTP service users can only access a specific file directory, version requires more than 4.8 The code is as follows: [Root@localhost ftp]# Rpm-qa | grep OpenSSH Openssh-server-5.3p1-81.el6_3.x86_64 Openssh-5.3p1-81.el6_3.x86_64 Openssh-cli

new folder to hold the data fileMkdir3 Scripting for backup (you can actually manually but on the one hand you need to enter a large number of commands two aspects may be due to the connection interruption and lead to progress is not smooth)Vim rcopy.sh#!/bin/kshExport Lang=en_usRman_log_file=${0}.outOracle_home=/u01/app/oracle/product/11.2.0/db_1Export Oracle_homerman= $ORACLE _home/bin/rmanExport RMANOracle_sid=daveExport Oracle_sidOracle_user=oracleExport Oracle_userecho "Oracle_sid: $ORACLE

Document directory Why vector clocks are easy Why vector clocks are hard Why vector clocks are easy Http://basho.com/blog/technical/2010/01/29/why-vector-clocks-are-easy/Vector clocks by example Through the following routine examples to help you understand vector clock, you will find that this algorithm is not complex.You want to plan the day of dinner next week? How can we achieve eventual consistency?Of course, this problem can also be solved using paxos.Another idea is to use the vector c

like AF_KTLS, but I've brushed it off again and again, until now, I've left the company, and I'm not even doing anything related to SSL/TLS or PKI, but suddenly let me know there's a ready-made solution from Facebook, It's been 2016 years! Facebook's program came from 2015, but we can actually do it earlier, but no, so I'm very sorry! The reason I'm saying this is because I almost don't need you to think about it. Step by step keep up with Dave Watso

/app/oracle/oradata/anqing/sysaux01.dbf /U01/app/oracle/oradata/anqing/system01.dbf /U01/app/oracle/oradata/anqing/example01.dbf -- Destroy the users01.dbf data file: [Oracle @ dave anqing] $ pwd /U01/app/oracle/oradata/anqing [Oracle @ dave anqing] $ ll users01.dbf -Rw-r ----- 1 oracle oinstall 34086912 10 ?? Users01.dbf [Oracle @ dave anqing] $ echo> users01.db

.102/b14200/clauses004.htm#SQLRF01602No information was found in the official documentation for Oracle 11g. Because there is no 11g library at hand, it is not a good test. This blog is tested based on Oracle 10g environments.Let's do some tests:1. Create a table space DaveSql> Show user;USER is "SYS"Sql> Create tablespace Dave datafile '/u01/app/oracle/oradata/dave2/dave01.dbf ' size 100M;Tablespace created.2. Create the table anqing and specify the s

first (top) input and the second (bottom) Input join. This is the same as querying multiple tables using select statements, so there are very few internal connections.Another note is that Join is an inner join by default. Therefore, when writing an inner connection, we can omit the keyword inner.1.2 The following is an example to describe the internal connection:1.2.1 create two test tables and insert data first:SQL> select * from dave;ID NAME-------

Version 10.2.0.1.0-Production SYS @ dave1 (rac1)> 2.2 ASM instance version [Oracle @ rac1 ~] $ Export ORACLE_SID = + ASM1 [Oracle @ rac1 ~] $ Sqlplus/as sysdba; SQL * Plus: Release 10.2.0.1.0-Production on Thu May 12 18:19:29 2011 Copyright (c) 1982,200 5, Oracle. All rights reserved. Connected: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0-Production With the Partitioning, Real Application Clusters, OLAP and Data Mining options SYS @ + ASM1 (rac1)> 2.3 RAC process info. [Oracle @ r

The entire concept of Software Defined Network (SDN) is about abstracting hardware to enable new types of network streams. Although many early discussions on SDN are concentrated on routers and switches, SDN does not stop here. SDN has many functions, including helping WCO and application delivery controller (ADC) businesses. Recently, network vendor Riverbed has joined the web content optimization market with its Stingray product series, which also includes the application delivery controller (

Mining options SYS @ dave1 (rac1)> select * from v $ version; BANNER ---------------------------------------------------------------- Oracle Database 10g Enterprise Edition Release 10.2.0.1.0-Prod PL/SQL Release 10.2.0.1.0-Production CORE 10.2.0.1.0 Production TNS for Linux: Version 10.2.0.1.0-Production NLSRTL Version 10.2.0.1.0-Production SYS @ dave1 (rac1)> 2.2 ASM instance version [Oracle @ rac1 ~] $ Export ORACLE_SID = + ASM1 [Oracle @ rac1 ~] $ Sqlplus/as sysdba; SQL * Plus: Release 10.2.

Common:1. They are all core types of Python and are part of the Python language itself Core types and non-core typesMost core types can generate their objects through specific syntax, such as "Dave" is an expression that creates an object of type string;Non-core types require built-in functions to create, such as file types that need to call the built-in function open ().Class can also be understood as a custom non-core type. 2. Boundary checks are n