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This article explains the steps to analyze IBM Lotus Notes and Domino hangs and crashes using the Lotus Notes diagnostic (LND) tool, a process that is alsoUseful for analyzing the files in the IBM technical support folder. Showtable of contentshidetable OF CONTENTS 1 Overview 2 downloading and installing the LND Tool 3 using the tool 3.1 processing a semaphore File 3.2 processing a memory dump file 3.3 processing a dxl File 4 C

. Core dump and heap dump analysis toolsCore Dump analysis tool: IBM thread and monitor dump analyzeHeap dump analysis tool: mdd4j or heap analyzer. Other tools: visualvm, netbeans or eclipse's memory analyzer tool // Add an analysis instance to todo 3. Reprinted an article about core dump and heap dump.From introduction to heap dump core dump Core dump and heap dumps: AJava CoreIs a snapshot of the threads at work in a JVM. it also details a cro

Python module knowledge 4: serialization of Json/pickle and jsonpickle Serialization and deserialization Serialization: converts the basic data type of Python to a string. Deserialization: converts a string to the basic data type of Python. Two modules used for serialization in Python: Json is used for conversion between [String] and [python basic data type]. Because the string is common in various languages, json is more suitable for cross-language conversion; however, only dict, list, tup

This article describes how to solve the Pythonjson error xxisnotJSONserializable. For more information about the Python json error xx is not JSON serializable, see the following article, for more information, see Python json error xx is not JSON serializable solution When using json, xxx is not JSON serializable is often encountered, that is, some objects cannot be serialized. Django users often know that django has a built-in Encoder to serialize time and other common objects. In fact, we can

(base_dir) from conf import userdb_setclass Ftp_server (socketserver. baseRequestHandler): user_home_dir = ''def auth (self, * args ): ''' authentication username and password ''' pai_dic = args [0] username = pai_dic ["username"] password = pai_dic ["password"] f = open (Userdb_set.userdb_set (), 'r') user_info = json. load (f) if username in user_info.keys (): if password = user_info [username]: self. request. send ('0 '. encode () OS. chdir ('/home/% s' % username) self. user_home_dir = OS.

Python is a simple implementation of reading and writing json files, JSON (JavaScript Object Notation) is a lightweight data exchange format. It is based on a subset of ECMAScript. JSON uses a completely language-independent text format, but it also uses a habit similar to the C language family (including C, C ++, Java, JavaScript, Perl, Python, and so on ). These features make JSON an ideal data exchange language. Easy to read and write, and easy to parse and generate by machines (generally use

, ' C ': 456, ' A ':123}>>> print (' Data: ', repr (data)) data: {' C ': 456, ' a ': 123, ' B ': 789} gt;>> print (' repr (data) : ', Len (repr (data)) repr (data) : 30>>> print (' Dumps (data) : ', Len (json.dumps (data))) dumps (data) : 30>>> print (' Dumps (data, indent=4) : ', Len (json.dumps (data, Indent = 4))

First, briefThe data we write in the file is only a string, but what if we want to save the memory data object to the hard disk? Here's to say serialization: JSON PickleSecond, JSON serialization1. Serialization of dumps and loads deserializationSerialization of Dumps ()ImportJson#Importing JSON modulesInfo= { 'name':"Seven", " Age": 32} with open ("Test.txt","W") as F:#write in normal modedata = Jso

Use of the mysqldump command 1. Export all libraries System command Line Mysqldump-uusername-ppassword--all-databases > All.sql 2. Import all libraries MySQL command line Mysql>source All.sql; 3. Export some libraries System command Line Mysqldump-uusername-ppassword--databases db1 DB2 > Db1db2.sql 4. Import some libraries MySQL command line Mysql>source Db1db2.sql; 5. Import a library System command Line Mysql-uusername-ppassword DB1 or MySQL command line Mysql>source Db1.sql;

PDB are overwritten without ignoring the useful information. However, if you have a large number of PDB, and just one of them hang, then this time leads to collect a lot of irrelevant data. With this idea, please pay every effort to identify which database hang, and collect information in that hang database. A. Dumps and tracesHanganalyze and SystemState dumps Hanganalyze and systemstate

--add-drop--database adds a drop DATABASE statement before each CREATE DATABASE statement. --add-drop-tables adds a drop TABLE statement before each CREATE TABLE statement. --add-locking uses the lock tables and unlock tables statements to refer to each table dump. Reload the dump file when it is inserted faster. --all--database,-a dumps all tables in all databases. In the same way that you use the---database option, name all databases on the command

JSON (JavaScript Object Notation) is a lightweight data interchange format. It is based on a subset of ECMAScript. JSON takes a completely language-independent text format, but also uses a similar idiom to the C language family (c, C + +, Java, JavaScript, Perl, Python, and so on). These features make JSON an ideal data exchange language. Easy to read and write, but also easy to machine parse and generate (typically used to improve network transfer rates). JSON is made up of lists and dict, res

pickle module and its homogeneous module cpickle provide pickle support to Python. The latter is encoded in C, it has better performance, and for most applications it is recommended to use this module. We will continue to discuss pickle, but the example in this article is actually taking advantage of Cpickle. Since most of these examples are to be displayed with a Python shell, first show how to import Cpickle and reference it as pickle:Copy the Code code as follows: >>> Import Cpickle as Pickl

The encoding and decoding methods of json data in Python are described in detail. This document describes how to encode and decode json data in Python. We will share this with you for your reference. The details are as follows: Python has built-in json data format processing methods since version 2.6. 1. Data Encoding in json format In python, The json data format is encoded using the json. dumps method. #! /Usr/bin/env python # coding = utf8import js

Python3 implements ftp service functions (client) and python3ftp The example in this article shares with you the code for implementing ftp service functions in python3 for your reference. The specific content is as follows: Client main code: # Author by Andy # _ * _ coding: UTF-8 _ * _ ''' This program is used to create an ftp client ''' import socket, OS, json, time, hashlib, sysclass Ftp_client (object): def _ init _ (self): self. client = socket. socket () def help (self): msg = '''useage: ls