lvm

Bookmarks for 29 Mar 2016 through 8 Apr 2016

These are my links for 29 Mar 2016 through 8 Apr 2016:

  • VMware: Add PortGroup to all hosts in cluster with PowerCLI – […]
    Today we configured a new VLAN on the physical switches, now we need to configure a portgroup with vlan id on multiple ESX hosts in our cluster. To do this by hand it will cost 3 minutes per host, to script this.. you configure this in 10 seconds![…]
  • Creating Active Directory Accounts – Microsoft stores a quoted password in little endian UTF16 base64 encoded.
  • LVM Loopback HOW-TO | Anthony’s Blog – This is a simple tutorial on setting up LVM on loopback devices, I’ve used it a few times for creating dynamic virtual disks; it came in particularly handy when archiving NEXRAD radar data for my radarwatchd project – using up all your inodes on several hundreds of thousands of 15Kb files doesn’t sound like my idea of fun. Creating a virtual volume with reiserfs was a particularly handy solution in this case.
  • Retroshare – Retroshare creates encrypted connections to your friends. Nobody can spy on you. Retroshare is completely decentralized. This means there are no central servers. It is entirely Open-Source and free. There are no costs, no ads and no Terms of Service.

Bookmarks for 15 nov 2014 through 26 nov 2014

These are my links for 15 nov 2014 through 26 nov 2014:

  • Charted – Charted is a tool for automatically visualizing data, created by the Product Science team at Medium. Give it the link to a data file and Charted returns a beautiful, shareable chart of the data. We built Charted with a few core principles in mind: Charted does not store any data. It only fetches and visualizes what the link provides. It also refetches the data every 30 minutes, so the chart is always up-to-date. Charted does not transform or manipulate data. It displays only and exactly what it receives. Any necessary calculations or adjustments must already be reflected in the data. Charted is not a formatting tool. It is deliberately sparse in features. Charted focuses on getting from the data to the visualization with the fewest decisions possible. As a result, we simplified Charted to just a few options. Here’s a walk-through of those options. [ via http://onethingwell.org/post/103638738213 ]
  • Simple Amazon Glacier Uploader – Amazon Glacier is a long-term persistent file-storage system for cold data storage. As a GUI wrapper for the Glacier command line tools, The Simple Amazon Glacier Uploader aims to be an upload and download solution that is as durable as your data. SAGU is a single .jar file Glacier interface written in Java for cross-platform accessibility. The use of Java assures that you will have access to your files regardless of your operating system when it is time to retrieve your data.
  • Snapper, The ultimate Snapshot Tool for Linux – Snapper is a tool for Linux filesystem snapshot management. Apart from the obvious creation and deletion of snapshots, it can compare snapshots and revert differences between snapshots. In simple terms, this allows root and non-root users to view older versions of files and revert changes. The features include: Manually create snapshots Automatically create snapshots, e.g. with YaST and zypp Automatically create timeline of snapshots Show and revert changes between snapshots Works with btrfs, ext4 and thin-provisioned LVM volumes Supports Access Control Lists and Extended Attributes Automatic cleanup of old snapshots Command line interface D-Bus interface PAM module to create snapshots during login and logout

Bookmarks for 26 ago 2014 through 27 ago 2014

These are my links for 26 ago 2014 through 27 ago 2014:

  • Regular Expressions – Regular expressions ("regexes") are supercharged Find/Replace string operations. Regular expressions are used when editing text in a text editor, to: check whether the text contains a certain pattern find those pattern matches, if there are any pull information (i.e. substrings) out of the text make modifications to the text. As well as text editors, almost every high-level programming language includes support for regular expressions. In this context "the text" is just a string variable, but the operations available are the same. Some programming languages (Perl, JavaScript) even provide dedicated syntax for regular expression operations.
  • MySQL active-passive cluster | Your IT goes Linux – We will use the iSCSI Lun defined in our iSCSI cluster as a shared storage and we will run MySQL in active-passive (fail-over) mode using Pacemaker and Corosync cluster engine. The cluster will have to connect to the iSCSI target, mount the iSCSI partition on one node and start a MySQL service which has all its data on this partition.
  • Perl – […] Perl has horrors, but it also has some great redeeming features. In this respect it is like every other programming language ever created. This document is intended to be informative, not evangelical. It is aimed at people who, like me: dislike the official Perl documentation at http://perl.org/ for being intensely technical and giving far too much space to very unusual edge cases learn new programming languages most quickly by "axiom and example" wish Larry Wall would get to the point already know how to program in general terms don't care about Perl beyond what's necessary to get the job done. This document is intended to be as short as possible, but no shorter[…]
  • Linux Performance – This page links to various Linux performance material I've created, including the tools maps on the right, which show: Linux observability tools, Linux benchmarking tools, Linux tuning tools, and Linux observability sar. For more diagrams, see my slide decks below.
  • AIXchange: Useful Storage Links – Here's an assortment of really good storage-related articles — the majority of which are found on IBM developerWorks — that are worth your time. While some of them are a few years old, they still provide relevant information.

Bookmarks for 13 lug 2014 through 14 lug 2014

These are my links for 13 lug 2014 through 14 lug 2014:

  • Inbox – The next-generation email platform – Inbox uses standard interfaces that you've come to expect from modern APIs. We've taken care of the bugs and edge-cases with character encodings, MIME structures, misformatted socket protocols, and more. Plus, your app will continue to "just work" over the same API as more providers are added.
  • RainLoop Webmail – Modest system requirements, decent performance, simple installation and upgrade, no database required – all these make RainLoop Webmail a perfect choice for your email solution. You are free to use RainLoop Webmail for your personal or non-profit projects.
  • LCMC – The LCMC is a GUI application that configures, manages and visualizes high-availability clusters. Specifically it manages clusters that use one or more of these components: Pacemaker, Corosync, Heartbeat, DRBD, KVM, XEN and LVM.
  • Index of /tig – Tig is an ncurses-based text-mode interface for git. It functions mainly as a Git repository browser, but can also assist in staging changes for commit at chunk level and act as a pager for output from various Git commands.
  • The World’s Most Powerful Browser-Based IDE – Codio – Codio is a powerful cloud and browser based IDE that covers the complete web development cycle; from prototype to deployment

Bookmarks for 3 lug 2014 through 8 lug 2014

These are my links for 3 lug 2014 through 8 lug 2014:

  • Top 5 Atom Editor features and tweaks | Grigio.org – un blog critico su Linux Ubuntu, Tecnologia e altro –
  • Hemingway – Hemingway App makes your writing bold and clear. Hemingway highlights long, complex sentences and common errors; if you see a yellow highlight, shorten the sentence or split it. If you see a red highlight, your sentence is so dense and complicated that your readers will get lost trying to follow its meandering, splitting logic — try editing this sentence to remove the red.
  • mpalmer/lvmsync – Have you ever wanted to do a partial sync on a block device, possibly over a network, but were stymied by the fact that rsync just didn't work? Well, fret no longer. As long as you use LVM for your block devices, you too can have efficient delta-transfer of changed blocks.
  • gerrit – Gerrit Code Review – Google Project Hosting – Gerrit is a web based code review system, facilitating online code reviews for projects using the Git version control system. Gerrit makes reviews easier by showing changes in a side-by-side display, and allowing inline comments to be added by any reviewer. Gerrit simplifies Git based project maintainership by permitting any authorized user to submit changes to the master Git repository, rather than requiring all approved changes to be merged in by hand by the project maintainer. This functionality enables a more centralized usage of Git
  • ranger – ranger is a file manager with VI key bindings. It provides a minimalistic and nice curses interface with a view on the directory hierarchy. The secondary task of ranger is to psychically guess which program you want to use for opening particular files.

Bookmarks for 25 lug 2012 from 14:52 to 15:47

These are my links for 25 lug 2012 from 14:52 to 15:47:

  • Disaster: LVM Performance in Snapshot Mode – MySQL Performance Blog – In many cases I speculate how things should work based on what they do and in number of cases this lead me forming too good impression about technology and when running in completely unanticipated bug or performance bottleneck. This is exactly the case with LVM
    Number of customers have reported the LVM gives very high penalty when snapshots are enabled (leave along if you try to run backup at this time) and so I decided to look into it.
  • Netexpertise » Mysql Ultra-Fast Backup with LVM – It is generally good practice to respect the two following points when backing up databases. The backup has to be:
    consistent
    fast
    Consistency is easily achieved putting a read lock on all tables beforehands. However, this isn’t always applied, and WILL definately lead to a database integrity problem at some stage.
    Once a lock has been set on the database, the backup has to be as quick as possible, all write instructions being held in the queue.
  • MIME and HTML in Email – How to encapsulate HTML in an email message and send via sendmail

Bookmarks for 24 lug 2012 from 17:16 to 17:32

These are my links for 24 lug 2012 from 17:16 to 17:32:

  • Five Tips for a Better sendmail Configuration – O’Reilly Media – Unix vendors bundle sendmail with the operating system and ship it out preconfigured. It is very easy to install the OS and use the sendmail configuration delivered with the system. Don't be fooled by this apparent simplicity. In the long run, it is better to take charge of your fate. Creating a custom sendmail configuration using current software and features selected for your environment will give you better performance, reliability, security, and maintainability. Here are some tips to get you started on building a better sendmail configuration.
  • Epoch Converter – Unix Timestamp Converter – Epoch & Unix Timestamp Conversion Tools
  • mylvmbackup – mylvmbackup is a tool for quickly creating backups of a MySQL server's data files. To perform a backup, mylvmbackup obtains a read lock on all tables and flushes all server caches to disk, creates a snapshot of the volume containing the MySQL data directory, and unlocks the tables again. The snapshot process takes only a small amount of time. When it is done, the server can continue normal operations, while the actual file backup proceeds.

Bookmarks for 22 giu 2012 through 25 giu 2012

These are my links for 22 giu 2012 through 25 giu 2012:

Bookmarks for 18 giu 2012 through 22 giu 2012

These are my links for 18 giu 2012 through 22 giu 2012:

  • Replacing a failed disk (rootvg) « Welcome to my AIX blog – This post will describe the replacement of a failed rootvg disk.
  • Mozilla Thimble – Thimble makes it ridiculously simple to create your own web pages. Write and edit HTML and CSS right in your browser. Instantly preview your work. Then host and share your finished pages with a single click. Easy, huh?
  • Inventare e raccontare storie « vibrisse, bollettino – Queste diciassette lezioni sono state realizzate da Giulio Mozzi e Marco Zuin, nell’ambito del progetto Scuola d’Autore 2009/2010 dell’Istituto per la sperimentazione didattica ed educativa (Iprase) della Provincia di Trento.

Bookmarks for 18 mag 2012 through 20 mag 2012

These are my links for 18 mag 2012 through 20 mag 2012:

  • Linux system administrator and Oracle DBA guide: How to use rman backup to duplicate database and change db_name – Environment: OL 5.7 32bit, Oracle database 11.2, sid=orcl
    Objective: duplicate database on the same server then change db_name from orcl to devdb
    concept: duplicate line in /etc/oratab, make orcl and devdb instance, then make everything in password file, spfile/pfile, controlfile, redo log, data file from orcl to devdb, only leave db_name in pfile/spfile as orcl for rman restore from orcl database backup, then use nid to change db_name
  • Linux system administrator and Oracle DBA guide: How to add LUN disk online under CentOS 6.2 – Environment: CentOS 6.2 64bit with multipath connected to HP EVA storage, the LUN disk was LVM disk
    Objective: add a new LUN disk for server online and add into the existing LVM to make the partition size bigger
    scenario: LVM add new lun disk, increase the existing lvm lun disk, increase the existing partition disk such as /dev/sda1
  • Git Client – SmartGit – SmartGit is a graphical client for the Open Source version control systems Git, Mercurial and SVN. It runs on Windows, Mac OS X and Linux.
    SmartGit helps Git and Mercurial beginners to get started quickly and lets advanced users become more productive with its efficient user interface.