2 Industry Waves Backup and recovery evolution Version 1.0 Majority of companies use tape Tape one...
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Transcript of 2 Industry Waves Backup and recovery evolution Version 1.0 Majority of companies use tape Tape one...
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Industry WavesBackup and recovery evolution
Version 1.0
Majority of companies use tape
Tape one size fits all Backup once per day Tape recoveries slow
& unreliable Administrators do all
recoveries
Today
Disk based backup becoming cost effective
Archive and Backup diverge
Recovery in minutes or seconds
Continuous backup End user recovery Self healing backups
Future
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Rapid and Reliable Recovery
Recovery is unreliable and painful Too slow and expensive to recover files
typical recovery takes hours or days (slow, expensive)
Recoveries and unreliable 42% of companies had failed recovery in past
year 50% of customers wish for online backup
verification Data protection is labor intensive All recoveries go through the server admin Solution with DPM Designed for fast recovery Enables a whole new recovery scenario–end
users: files, Admins: servers Snapshots enable multiple recovery points Recoveries are assured through verification
Customer Data Protection Pain PointsCustomer Needs: Faster Recovery
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Continuous
and efficient
protection
Backup is too complex, slow, and inefficient Shrinking backup window
Growth in data makes it too difficult and time consuming to back up
Backups too slow/lots of manual scheduling Mandated disaster recovery plans 24 hours of data loss assumed with tape Tape as one size fits all (file and server recovery,
offsite protection and long term archive) Tape inconvenience and unreliability of is # 1
challenge
Solution with DPM Faster and More Efficient Backup
Never do a full backup from a production server again
Avoid the shrinking backup window
Customer Needs: Eliminating Backup Window
Customer Data Protection Pain Points
5
Current backup products are too complex, costly Companies spend too much time and money on
backup Labor is the majority of backup cost Branch office data protection is cumbersome Massive data growth increases costs Too many tapes Most disk-based backup solution are cost prohibitive
Operational
Simplicity
Solution with DPM Designed to reduce TCO via continuous,
disk-based backup Automatic protection schedules = reduce
operational costs, increase efficiency Allows end users to easily recover their own
files Usability and easier management Integration into existing environment Industry standard hardware and software
Customer Needs: Simpler Solution, Lower costs
Customer Data Protection Pain Points
Microsoft – NDA Only6
What does DPM do?
Near continuous (hourly) protection of files DPM agent on file servers Byte-level changes transmitted to DPM
server
Multiple scheduled snapshots per day
Easy IT or End-User restore – fast from disk
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DPM ServerDPM “Under The Hood”
Agent components: File System Filter: runs in kernel
mode File Agent service runs in user
mode Requires reboot of file server Each protected volume has
synchronization log Synchronization log 10% of volume
size Agent overhead 3-5%
Synchronization “Pull” model, synchronizations instigated by
DPM Asynchronous replication Two communication channels
Control commands - DCOM Data movement - DPM proprietary protocol
Replication unit of operation is protected volume
Check points: 2 min/10 MBs Byte level replication
Consistency Check Unexpected events create need
to resync replica Consistency Check does two
things Checks file by file for more recent
modified times If changed, all blocks associated
with file are check summed and appropriate blocks are replicated to DPM server
All open files are check summed irregardless
DPM Engine .NET application (managed code) Application state and configuration
data stored in SQL Protected data stores:
Replica Area is a mounted volume that is made up of replica of protected volume and the diff area
Transfer Area is an unmounted volume that contains the spill log
Non-blocking, distributed architecture
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.NET application (managed code) All application state and configuration data stored
in full SQL Server database Protected data stored in the following places
Replica Area is a mounted volume that is made up of replica of protected volume and the diff area
Transfer Area is an unmounted volume that contains the spill log. Spill log holds data transferred from protected server but yet to be applied to replica.
Non-blocking, distributed architecture. All operations are autonomous of each other thus allowing system to scale to limits of hardware
DPM – Technology OverviewDPM Engine
DPM Server
File Servers
Active DirectoryClients
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Agent components: File System Filter: runs in kernal mode,
implemented as mini-filter per W2K3 SP1 File Agent service runs in user mode
Requires reboot of file server before operating due to legacy (non-mini filters) to assure correct ordering
Each volume with protected object has synchronization log in hidden Volume System Information directory
Synchronization log is by default 10% of volume size but can be adjusted
Agent puts overhead of 3-5% on processor protected server
DPM – Technology OverviewAgent
File Servers
Active DirectoryClients
DPM Server
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“Pull” model, all synchronizations instigated by DPM server
Asynchronous replication Two separate channels for communication
Control commands sent over DCOM Data movement sent over TCP/IP using DPM
proprietary protocol Replication unit of operation is the protected
volume Check points the lesser of 2 min or 10 MBs for
resumption of incomplete operations All file operations are replicated (rename, delete,
copy) along with all changed blocks, this is most similar to “byte level replication”
DPM – Technology OverviewSynchronization
File Servers
Active DirectoryClients
DPM Server
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Various unexpected events create need to resync replica with source data (hard reboot of protected server, synchronization log overflow)
Sync with Consistency Check does two things Checks file by file for more recent modified
times then on replica If changed, all blocks associated with file
are check summed and appropriate blocks are replicated to DPM server
All open files are check summed irregardless Rolling process that traverses the entire
directory tree, not a snapshot that freezes volume at point in time
DPM– Technology OverviewSynchronization with Consistency Check
File Servers
Active DirectoryClients
DPM Server
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Monitor
Monitor the health and status of your DPM server easily Set up automatic alerts via email
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DPM/MOM Integration
Control and monitor multiple DPM Servers All alerts and events uploaded to MOM
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Top 10 Reasons To Deploy DPM Recover files in minutes instead of hours Eliminate the backup window of your production
servers Shrink potential data loss down to 1 hour No more failed recoveries Get easy instant backup verification Enable end users to perform their own
recoveries Setup and protect your file servers in minutes Advanced functionality at low cost Remove tapes from branch offices and
centralize backups at datacenter
Rich out-of-box reporting and monitoring functionality
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PVCPrevious Versions Client
is an applet that extends Windows
Explorer and Office applications with
this simple new tab.
Available since Windows Server 2003
and VSS.
Usually installed silently via
Group Policy
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Software
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