HyperV 2012 - Spostare a caldo un VM

2012 Server
Una delle novità molto interessanti di Windows Server 2012 è la possibilità di spostare “a caldo” una virtual machine tra due host Hyper-V, senza l’interruzione di servizi e applicazioni, a differenza del 2008 R2, quest’operazione può essere fatta fra due Server che non hanno lo storage condiviso.

Di seguito l’articolo con la relativa procedura:
http://blogs.sysadmin.it/marios/archive/2012/12/07/windows-server-2012-live-migration-e-spostamento-virtual-machine-tra.aspx

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Hardware – Confronto fra HD tradizionali ed SSD

Vantaggi degli SSD

• Rumorosità assente
• Maggior resistenza agli urti e rischi di rottura minori
• Minor consumo durante le operazioni di lettura e scrittura
• Tempo di accesso ridotto (circa 50 volte inferiori a quelli di un disco magnetico)
• Minor produzione di calore

Svantaggi degli SSD

• Prezzo per GB maggiore di circa 10 volte (dal seguente 18 Month HDD & SSD Price Analysis of European E-Tailers risulta che il prezzo medio degli SSD è di 1.21 Euro/GB contro 0,122 Euro/GB per gli HDD). Va comunque considerato che nel 2012 il prezzo degli SSD è sceso in media circa del 24%, mentre a causa delle alluvioni in Thailandia il prezzo degli HHD è salito in media circa del 47%.
• Una possibile minore durata in base al tipo di utilizzo, a causa del limite di riscritture delle memorie flash (al momento i produttori di SSD dichiarano un numero massimo di riscritture consecutive dello stesso bit che varia da 10.000 a 1.000.000 di cicli)

Un’altra cosa da tenere presente è che la frammentazione di un disco SSD non influisce sulle sue prestazioni, infatti il tempo d'accesso a qualunque cella è identico, per questa ragione i moderni sistemi operativi disattivano la deframmentazione del disco, in quanto risulta inutile e dispendiosa in termini di cicli di scrittura.
Per quanto riguarda il page file (pagefile.sys) dal momento che in generale su di esso vengono eseguite piccole letture casuale e grandi scritture sequenziali l’SSD risulta particolarmente adatto ad ospitarlo garantendo quindi performance superiori ad un HDD.
Non ci sono invece differenze sostanziali di performance nel memorizzare il file hiberfile.sys (utilizzato per l’ibernazione e la sospensione) su un SSD rispetto a memorizzarlo su un HDD.

Notare dal seguente articolo:

Warning

When you install Windows 8 to a SSD, we recommend that you run WinSAT.exe formal to help optimize Windows for use on SSD. This reduces the number of write operations that Windows makes to the SSD, and makes other optimizations. Run WinSAT.exe formal during audit mode while you are preparing your Windows deployment. Optionally, you can run WinSAT.exe formal after OOBE completes. If you run WinSAT.exe formal in audit mode and then run sysprep /generalize, the WinSAT result files will be deleted. We recommend that you run WinSAT formal on the factory floor for each PC that you intend to ship to a customer. For more information, see Configure Windows System Assessment Test Scores.

Note: Per ridurre il numero di cicli di scrittura potrebbe essere utile spostare su un HDD i file di piccole dimensione scritti frequentemente come ad esempio i file temporanei del browser, la cache dei programmi di posta e il file hiberfile.sys che non trae grandi vantaggi dall’essere posizionato su un SSD. Inoltre nel caso in cui il pagefile.sys non sia utilizzato di frequente si potrebbe pensare di spostare anche quest’ultimo su un HDD in quanto visto lo scarso utilizzo in generale le performance non risentirebbero mentre si andrebbe a risparmiare cicli di scrittura.

·  In base a quanto detto precedentemente gli SSD risultato indicati in tutti quegli scenari in cui in cui vi sono letture frequenti e scritture di grandi file in modo sequenziale, come ad esempio:

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• Memorizzazione di Parent VHD in scenari VDI
• Memorizzazione di database dedicati al Data warehouse (OLAP) o database OLTP in cui la tipicità dei dati gestiti porta a letture frequenti e scritture massive
• Memorizzazione dei VHD del sistema operativo delle VM dei sistemi server

[articolo di riferimento http://blogs.sysadmin.it/ermannog/archive/2012/12/10/considerazioni-sullrsquoutilizzo-di-drive-ssd.aspx ]

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Programma – Pstools di Sysinternal

Vedere anche il post seguente relative sul blog:
 
http://alessandromazzanti.blogspot.it/2011/03/eseguire-comandi-remoti-sui-pc-in-rete.html?m=1
 
 Download PsTools Suite (1.3 MB)

Introduction

The Windows NT and Windows 2000 Resource Kits come with a number of command-line tools that help you administer your Windows NT/2K systems. Over time, I've grown a collection of similar tools, including some not included in the Resource Kits. What sets these tools apart is that they all allow you to manage remote systems as well as the local one. The first tool in the suite was PsList, a tool that lets you view detailed information about processes, and the suite is continually growing. The "Ps" prefix in PsList relates to the fact that the standard UNIX process listing command-line tool is named "ps", so I've adopted this prefix for all the tools in order to tie them together into a suite of tools named PsTools.
Note: some anti-virus scanners report that one or more of the tools are infected with a "remote admin" virus. None of the PsTools contain viruses, but they have been used by viruses, which is why they trigger virus notifications.
The tools included in the PsTools suite, which are downloadable as a package, are:

• PsExec - execute processes remotely
• PsFile - shows files opened remotely
• PsGetSid - display the SID of a computer or a user
• PsInfo - list information about a system
• PsPing - measure network performance
• PsKill - kill processes by name or process ID
• PsList - list detailed information about processes
• PsLoggedOn - see who's logged on locally and via resource sharing (full source is included)
• PsLogList - dump event log records
• PsPasswd - changes account passwords
• PsService - view and control services
• PsShutdown - shuts down and optionally reboots a computer
• PsSuspend - suspends processes
• PsUptime - shows you how long a system has been running since its last reboot (PsUptime's functionality has been incorporated into PsInfo)

The PsTools download package includes an HTML help file with complete usage information for all the tools.


Download PsTools Suite
(1.3 MB)
 
Programma – RegDelNull di Sysinternal
RegDelNull
 
Scan for and delete Registry keys that contain embedded null-characters that are otherwise undeleteable by standard Registry-editing tools.

[update Dicembre 2014] 

Per maggiori info sull'utilizzo di psexec potete fare riferimento al seguente articolo: https://turbolab.it/407

Programma – Virtual Desktop

L’applicazione Desktops di Sysinternal permette di avere desktop virtuali. Ecco la relativa descrizione:

This new utility enables you to create up to four virtual desktops and to use a tray interface or hotkeys to preview what’s on each desktop and easily switch between them.

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Backup - Server Backup Free

High Performance Backup 

The first time your continuous data protection policy runs, it will perform a full backup of your data. After the initial replica, Server Backup stores block level deltas, leading to shorter backup windows and reduced disk I/O. 

 Easy Disk to Disk Backup

Each backup is a fully recoverable, point- in-time “recovery point”. When you need to recover, you point and click on the recovery point you need to recover and that's it.
Store and archive Virtual Full Backup replicas onto any disk based storage, second hard drives, network shares, NAS, CIFS, SAN, ISCSI, etc. 

 Portable Backup Storage

With Portable Disk Safe® technology, your backups go wherever you need them to. Move a Disk Safe to a new location, open it with another Server Backup installation or even copy it to a USB drive. 

 MS Volume Shadow Copy

Microsoft Volume Shadow Copy Service is used to produce a point-in-time snapshot of disk volumes, delivering protection for locked and open files. 

 Powerful File Excludes

Browse file system and select any combination of files and folders to be excluded from your continuous data protection policy. Add advanced rules and exclude rules using patterns to exclude only certain file types. 

 Efficient Backup Storage

Virtual Full Backups mean unique disk blocks are only stored one time in your backup storage, even across thousands of recovery points. Keep more recovery points longer and save space over your existing full or incremental backups. 

 Intuitive Web Interface

In addition to policy management and reporting, browse, download, and restore files from recovery points using an Explorer-style interface. Additionally, users can see the detailed progress of replication and restore jobs as they run.

Industrial Strength Storage

Archive up to 64TB of recovery points per disk. On-disk journaling passes the ACID test and recovers automatically from crashes and product failure. 

 Simultaneous Restores

Never wait for a restore job to begin again. Restore even while your policy is replicating. Perform multiple file restore jobs simultaneously. 

 Compression

With both QuickLZ and industry standard zlib (Zip), Server Backup Free compresses data at the block-level and only stores it once, until it changes or is no longer needed. Typical compression ratios are 2:1. 

 Data Retention Policy

Define a replication goal, such as every 15 minutes, every hour, or every 4 hours. Then manage your storage by defining how many recovery points you will retain. Old recovery points are automatically merged and their storage is recycled.

Download

Evaluation copies available

n/a

Yes, free for 14 days

Price

Free

$20 per VM, $200 per Server

Ecco il link:

http://r1soft.idera.com/tools/server-backup-free/

Programma - BlueScreen Screen Saver di Sysinternal

 Download BlueScreen (64 KB)

Introduction
One of the most feared colors in the NT world is blue. The infamous Blue Screen of Death (BSOD) will pop up on an NT system whenever something has gone terribly wrong. Bluescreen is a screen saver that not only authentically mimics a BSOD, but will simulate startup screens seen during a system boot.

• On NT 4.0 installations it simulates chkdsk of disk drives with errors!
• On Win2K and Windows 9x it presents the Win2K startup splash screen, complete with rotating progress band and progress control updates!
• On Windows XP and Windows Server 2003 it presents the XP/Server 2003 startup splash screen with progress bar!

Bluescreen cycles between different Blue Screens and simulated boots every 15 seconds or so. Virtually all the information shown on Bluescreen's BSOD and system start screen is obtained from your system configuration - its accuracy will fool even advanced NT developers. For example, the NT build number, processor revision, loaded drivers and addresses, disk drive characteristics, and memory size are all taken from the system Bluescreen is running on.
Use Bluescreen to amaze your friends and scare your enemies!
 
Installation and Use
Note: before you can run Bluescreen on Windows 9x, you must copy \winnt\system32\ntoskrnl.exe from a Windows 2000 system to your \Windows directory. Simply copy Sysinternals BLUESCRN.SCR to your \system32 directory if on Windows NT/2K, or \Windows\System directory if on Windows 9x. Right click on the desktop to bring up the Display settings dialog and then select the "Screen Saver" tab. Use the pull down list to find "Sysinternals Bluescreen" and apply it as your new screen saver. Select the "Settings" button to enable fake disk activity, which adds an extra touch of realism!
 
More Information
You can find out how real Blue Screens are generated, and what the information on the Blue Screen means in my December 1997 Windows ITPro Magazine NT Internals column, "Inside the Blue Screen."
Note: Some virus scanners flag the Bluescreen screen saver as a virus. If this is the case with your virus scanner, you may not be able to use this screen saver.
 

Download Bluescreen
(64 KB)

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