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Deployment Options. Frank Bergmann frank.bergmann@project-open.com. Contents. SaaS Hosting What is SaaS Hosting? SaaS Hosting Pros & Cons Hosting @ Home Hosting @Home Pros & Cons A Typical Hosting @ Home Configuration How Everything Works Together Backup & Data Security Best Practices

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deployment options

Deployment Options

Frank Bergmannfrank.bergmann@project-open.com

contents
Contents

SaaS Hosting

  • What is SaaS Hosting?
  • SaaS Hosting Pros & Cons
  • Hosting @ Home
  • Hosting @Home Pros & Cons
  • A Typical Hosting @ Home Configuration
  • How Everything Works Together
  • Backup & Data Security Best Practices
  • Sizing
  • Simplified Network Architecture
  • Software Configuration
saas hosting software as a service
SaaS Hosting(Software as a Service)

A cost efficient option for small and medium companies.

No need for IT sophistication.

what is saas hosting
What is SaaS Hosting?

Software as a Service

  • ]po[ sets up your server together with several other servers in the ]po[ hosting center
  • ]po[ takes care of backup, security and other system administration tasks
  • The service is billed monthly

Flexible Options

  • Several hosting options are available with different performance levels
  • ]po[ provides you with the option to switch to any of the other hosting models
saas hosting pros cons
SaaS Hosting Pros & Cons

Advantages

  • No specific IT skills necessary in your company
  • Little up-front investment required
  • Professionally managed backup and security
  • Service is available even if your internet connectivity is down
  • Highest availability for external users

Disadvantages

  • File transfer speed is lower then on the local fileserver
  • Internet failures can disrupt your business
hosting @home
Hosting @Home

A cost efficient option for companies of all sizes with a certain degree of technology sophistication.

Maintenance is handled remotely by a ]po[administrator.

hosting @home pros cons
Hosting @Home Pros & Cons

Advantages

  • Fastest network connection
  • Seamless integration with the local file server
  • Sophisticated backup options available
  • Easy physical access to the servers
  • Service is available in the office even if the Internet connection is down
  • Highest availability for users in the same office

Disadvantages

  • Some IT sophistication in-house is necessary
  • Higher total cost then SaaS hosting
a typical hosting @ home configuration

RAID

RAID

RAID

RAID

RAID

RAID

RAID

RAID

A Typical Hosting @ Home Configuration

Freelance A

Freelance B

Security Features

An aDSL router provides a cheap connection to the Internet

A backup connection provides connectivity in case of a aDSL failure

A firewall provides controlled access from the Internet

A RAID array allow the productive server to survive the crash of a single hard disk

A tape device allows for daily backups of all corporate data.

A backup server is ready to take over in case of a failure of the main server.

Uninterruptible power Supplies (UPS) protect the system from power failures.

Internet

Primary

Hub/Switch

Secondary

1

aDSL

aDSL

2

3

Firewall

Server

5

4

Tape

PC

PC

PC

PC

PC

BackupServer

6

7

UPS

UPS

UPS

LAN

how everything works together
How Everything Works Together

Linux ]po[ Production Server

AOLServer is ]po[‘s “Application Server”…

…and executes the ]po[ code

All data are stored in a PostgreSQL database

The data are copied daily to the backup server

The backup server contains an exact copy of the production server, ready to take over in the case of a failure.

Documents and files are stored in a normal Windows file server with local backup.

The ]po[ servers “mounts” the Windows file server share in order to access the files. The files stay on the Windows server.

AOLServer

1

3

PostgreSQL

2

]po[ Code

Windows File Server

7

FileServer

6

Backup

4

7

Linux ]po[ Backup Server

AOLServer

5

PostgreSQL

]po[ Code

backup data security best practices

RAID

RAID

RAID

RAID

RAID

RAID

RAID

RAID

Backup & Data Security Best Practices

Backup Policies

  • All server should be equipped with RAID arrays.
  • We recommend a weekly full-backup of all data on a tape or similar device in order to be able to keep multiple versions.
  • The backup server should receive daily database backups of the production server in order to speed up the recovery process.

2

Server

Tape

1

3

BackupServer

Backup Scheme

Data are stored on a RAID array

Daily tape backup

Daily backup to backup server for quick recovery

sizing

RAID

RAID

RAID

RAID

RAID

RAID

RAID

RAID

Sizing
  • We recommend two identical servers as “production” and “backup + test” servers
  • “Active users” are those users who are requesting 1-10 ]po[ pages per minute
  • We recommend PostgreSQL for all but the largest installations

Server

Tape

BackupServer

simplified network architecture
Simplified Network Architecture

Freelance A

Freelance B

Internet

For small companies

(<10 active users, <30 employees)

  • Two ordinary PCs serve as servers. 2 SATA disks per computer act as RAID
  • A tape backup is attached to the productive server for daily backups.
  • A single aDSL lines provides Internet access
  • The aDSL router acts as a mini-firewall (packet filter)

Hub/Switch

Connection

Telephone

aDSL

PC

PC

Tape

PC

PC

PC

PC

PC

UPS

UPS

LAN

software configuration
Software Configuration

Configuration

  • We recommend Linux for the production and backup server (preferably RHEL or CentOS, alternatively Open SuSE 10.x, no SuSE Enterprise Server!)
  • PostgreSQL 8.2 for < 50 active users
  • Backup and failover configuration for operating system, database and user data
  • File storage kept apart from the ]po[ server.
  • System Monitoring (BigBrother, Nagios, …)

Documentation

  • Please see the “Operations & Maintenance Guide” for operation procedures
slide14
End

Frank Bergmann

frank.bergmann@project-open.com

www.project-open.com