Tux and the Five Nines

1
Tux and the Five Nines
Noor Ul Mubeen Wipro Technologies Ltd.
2
Whats Five 9's in Telecom

• Percentage Uptime of a node. 99.999
  a.k.a five 9's.
• Five 9's lt-gt 5 min downtime/year Six
  9's lt-gt 32 sec downtime/year
• System engineering benchmark for building blocks
  of a node.
• Such 'Carrier Gradedness' imposed EgOSSGR by
  Telecom regulatories FCC,TRAI on Service/
  Network providers.
• Quite frequently a marketing persons sales-pitch.
  So insist on long-duration 'field' reports as
  proof.

3
Linux influence in Telecom

• Platform support
• Industry platform cPCI, ATCA.. freedom.
• Multiple ArchPPC,x86,MIPS,ARM 64bit support
• SMP and HyperThreading
• Crosscompilers, toolchain
• HPI watchdog, OpenIPMI
• OS support
• Freedom to customise(GPL). Not tied to s/w
  vendor.
• Improved performace RT patches, O(1) const
  order scheduler, preemption...
• Protocol Stack support
• Robust TCP/IP stack. IPv6, Ipsec, MIPv6
• SIGTRAN SCTP, M2UA/M3UA, TIPC and RTP stacks.

4
Cone of Telecom Evolution
The separating distance between software,
hardware switching signifies interoperability/af
finity.
Software
Proprietary
Open Source
VoIP
TDM
Switching
Hardware
COTS
In-House
Closed Hybrid Open phase phase
phase
Time --gt
5
Open Source Development Labs

• Org formed in 2000 to create roadmap for Linux
  (www.osdl.org)
• OSDL founder members IBM,HP,CA,Intel NEC.
• Linus Traovalds moves from Transmeta to OSDL
  (2001). Andrew Morton joins-in.
• OSDL chapters include
• Desktop Linux
• Data center Linux(Enterprise)
• Carrier Grade Linux CGL
• Mobile Linux
• CGL defines a set of requirements specifications.
  Current version V3.0 and V3.1 in the making.

6
Open Source Development Labs

• CGL specification.
• Hardware
• Eg Blade HotSwap message
• Availability
• Eg Live patching
• Clustering
• Eg Application failOver 1sec
• Performance
• Eg Low sched latency 1ms

7
Open Source Development Labs...

• Serviceability
• Eg Kernel Panic enhancements
• Security
• Eg Ipsec for IPv4/6
• Standards
• Eg LSB 2.0.1,POSIX, stack RFCs

8
CGL,Middleware, SA Forum APIs
EgMGC, SIP server
(AIS)
Ais
(HPI)
CGL
(You are Here)
Eg cPCI or ATCA based
Figure SourceThe Service Availability Forum
Platform Interface
9
CGL Implementations

• MontaVista based CGE 4.0
• WindRiver Based NPE

10
References related links

• www.osdl.org
• www.picmg.org
• www.mvista.com
• www.windriver.com
• www.saforum.org

Any TradeMarks in above slides are Registered to
respective companies.
11
References related links