data center relocation can be a moving experience rob lyons consultant, resilient systems, inc
TRANSCRIPT
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Data Center Relocation Can Be a Moving Experience
Rob LyonsConsultant, Resilient Systems, Inc.
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Data Center Relocation
Applies equally to various office infrastructures
− Back-office servers
− Network routers, switches, gateways
− Telephone systems
− Desktop systems
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Data Center Relocation
• Up-front planning is the key
The farther ahead you know the details,The fewer and shorter disruptions you will have.
12-18 months is a good target
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Data Center Relocation
• Move team partnership
− Facilities - computers are office equipment, like desks and chairs
− IS services - phones, computers, and printers – just about everything that has a wire to it
− Victims - unless its on their desk, they don't want to know things changed
− Coordinator - official organizer and keeper of the plan
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Data Center Relocation
Relocation costs in perspective
Estimated that over 40% of a companies employees move in a year
It costs around $1000 to move an employee
IT relocation can be much higher when we factor in security, power, A/C, network wiring, fire protection
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Data Center Relocation
1. Simple tote and cable - also call "flash cut“
2. Shift replicated resources
3. Leapfrog through data replication
4. Treat move as a mock disaster
5. Multi-site clustering allows rolling relocation
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Data Center Relocation
1. Tote and cable
− Works best when scheduled downtime is plentiful
− Consists of• Shutdown• Un-cable• Carry it to the destination• Plug it in• Start it back up
− Used for workstations, single user or test systems
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Data Center Relocation
Destination site needs
PowerCapacity (UPS)Connector typeCable length
ClimateA/C capacityHumidity requirements
User accessScreen, keyboard, work surfaceNetworkSpecial (FDDI, F/C, modem lines)
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Data Center Relocation
Best practice:
Label and mark all previously used connectors
Make full data backup to protect from mechanical failures
Document verification tasks to know when system is done
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Data Center Relocation
Gotcha's
Cabinets need to fit through doors, halls, and vehicles
Network routers must be updated for new location
Operations responsibility transition (backup, reboot, access)
There is no easy fall-back solution since the previous room is empty
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Data Center Relocation
2. Shift replicated resources
Implemented through the use of redundant services which are placed on an extended network that spans both old and new sites
Desirable where network can bridge sites and permit multiple concurrent functions
• Internet proxy server• Print server• DNS or DHCP server• Redundant web servers
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Data Center Relocation
Best practice:
Test with limited accessibility before enabling general public
Keep old server available for a few days in case fall-back is needed
Short term rentals may reduce costs - rental can be used as live system while real system is moved to destination
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Data Center Relocation
Gotcha's
Some users may have set a specific IP address
Watch for performance changes due to new network topology
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Data Center Relocation
3. Leapfrog with data replication
Based on storage controller ability to construct and maintain a remote copy
Short downtime needed to change IP address and location of disk master copy of data
Based on the idea that the key part of the move is getting the data to the new site
Preferred for use with database servers or mail server
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Data Center Relocation
O rigina lserver
data spindles
Controller
data spindles
N ew server inS tand-by m ode
C atch-up copy
Controller
O ld site N ew site
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Data Center Relocation
Best practice:
Use automated scripts, if possible, to effect the storage configuration steps
Create and hold full backup at original site for protection until new site is fully operational
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Data Center Relocation
4.Treat move as a mock disaster
Schedule annual DR test to be full function relocation
May require extensive hardware investment or rented systems
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Data Center Relocation
Best practice:Separate physical relocation from cut-over where possible
Couple technology advancements that will not create high risk
Test new system under simulated load prior to switch-over
Use incremental back-up on previous copy of data to minimize downtime
System freeze window for application changes
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Data Center Relocation
5. Multi-site clustering allows rolling relocation
Based on O/S ability to maintain remote copy of data with simultaneous access from both sites.
Zero downtime
Prior preparation used to make single member RAID1 sets
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Data Center Relocation
O rigina lserver
data spindles
Controller
data spindles
N ew server isactive c luster
m em ber
Shadow copyon m ount
Controller
O ld site N ew siteCluster m aintained through network
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Data Center Relocation
Best practices:
Set initial system parameters manually to match old settings rather than use automatic tuning
Schedule cluster member reboot to clear old device names
Watch network traffic shift for any new bottlenecks
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Data Center Relocation
General Server Relocation Milestones
Move preparation• Inventory systems• Label used ports & external cables• Construct drawing of system at initial and destination
location• Verify new site has all connections and that they are
operational
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Data Center Relocation
Physical move tasks
• Perform full backup• Perform orderly shutdown (log system output)• Break down configuration into transportable units• Install available shipping brackets• Attach inventory labels to each unit• Move units out
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Data Center Relocation
Physical move tasks (cont.)
• Locate and organize units at destination• Inspect units for damage or handling issues• Position equipment for re-installation• Re-cable units• Perform basic health checks• Verify environmental considerations• Initiate startup (capture system output to a log files)• Verify system is operational
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Data Center Relocation
Final thoughts
If you must fall-back, you have still gained the knowledge of what it takes to succeed next time
If the system mostly works, it is usually better to fix the few issues than it is to fall-back and do it all over again
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Data Center Relocation
Questions