wcs operations training: operations procedures 29/12/2013 slide number 1 whitecross systems wx9020 -...
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WCS Operations Training: Operations Procedures04/10/23
Slide number 1
WhiteCross Systems
WX9020 - System Overview
Wx9
020
Dat
abas
e S
erve
r
WCS Operations Training: Operations Procedures04/10/23
Slide number 2
System Overview
Principles of Server Operation How is data stored? How do users get access?
The WX9020 Server What is behind the doors? Main components of rack Rack communications
WCS Operations Training: Operations Procedures04/10/23
Slide number 3
System Overview
The WX9000CP The Daemon
Thermal management
Power & batteries
Monitoring server operations
The next stage...
WCS Operations Training: Operations Procedures04/10/23
Slide number 4
Principles of Server Operation
The WX9020 Server is designed to be a high-capacity, high workload database server for use in data centres
Large datasets are loaded down on to the disks fitted to the server from a source elsewhere on the network
Parallel processing of large datasets gives phenomenal processing speeds
User access to the server is via a standard network connection
WCS Operations Training: Operations Procedures04/10/23
Slide number 5
Data in Memory (RAM)
To get the fastest processing performance, the user tables are copied from the disks and shared out among the processors which go to make up the processing network within the WX9020 server
WCS Operations Training: Operations Procedures04/10/23
Slide number 6
The User Environment
Users
System Administrator/DBA
Data source(s)
WX9000CP
Modem
WCS Operations Training: Operations Procedures04/10/23
Slide number 7
The WX9020 Server
Redundancy built into hardware - for reliability and availability
Power supplies (3) Battery back-up Temperature sensors (10) Fans (4) Software monitoring of hardware
components (fan speed, temp, power supplies etc.)
WCS Operations Training: Operations Procedures04/10/23
Slide number 8
Opening the Front Door
Acrylic panels assist in thermal management
Access to power supplies & batteries restricted
System Controller Subrack
Two configurable Subracks
Fan trays
Upper Fan Tray
Lower Fan TrayPower Supply Units
WCS Operations Training: Operations Procedures04/10/23
Slide number 9
Opening the Rear Door
Acrylic panels assist in thermal management
Access to power controls restricted
Three configurable Subracks
Fan trays Power ON/OFF
controls External connections to
power and WX9000CP
External connections
Upper Fan Tray
Lower Fan TrayAC Power Indicators
and switches
WCS Operations Training: Operations Procedures04/10/23
Slide number 10
Side View
Side panels can be easily removed
Removal not necessary for normal maintenance
Fro
nt
Rea
r
Cooling Fans
Cooling FansPower subsystem
System Controller
Subrack Subrack
Subrack Subrack
Subrack Subrack
(side-view)
PowerSwitch
WCS Operations Training: Operations Procedures04/10/23
Slide number 11
Configuring the WX9020
Choose the hardware configuration that most suits current needs - expand as needs grow
Each rack must contain a System Controller Subrack Hardware is configurable e.g. the BT system comprises:
1 Disk Subrack (below System Controller Subrack)
Four HCDMs = 8 x 2G IBM disks 16 Processor cards
9 in Processor Subrack (rear door, upper Subrack) 4 in System Controller Subrack 3 in Disk Subrack
WX9000CP connects via PE card in the Disk Subrack
WCS Operations Training: Operations Procedures04/10/23
Slide number 12
WX9020 Subracks
Subracks can be: System Controller
System Management Processor Subracks
Containing Processor cards Disk Subracks
Containing HCDMs & PS cards, Processor cards and PE card
WCS Operations Training: Operations Procedures04/10/23
Slide number 13
WX9020 Thermal Management
Rack contains two pairs of fans numbered 0,1,2,3 Rack contains ten temperature sensors numbered 0
- 9 Air is pulled through in two “chimneys” over contents
of cabinet Air inlet filter in rear door (bottom) Air outlet vents in rear door (top) Monitor hardware as part of regular maintenance
WCS Operations Training: Operations Procedures04/10/23
Slide number 14
The System Controller Subrack
Responsible for system management Booting up & shutting down Checks for system failure Communicates with outside world via WX9000CP Handles front panel messages Handles diagnostics Manages software upgrade
WCS Operations Training: Operations Procedures04/10/23
Slide number 15
The System Controller Subrack (2) A dual rack containing several different cards:
System Controller cards Processor cards HSL cards Front Panels
Key switches LCD displays
Everything doubled for failure resilience
WCS Operations Training: Operations Procedures04/10/23
Slide number 16
Layout of the System Controller Subrack A fault-resilient, dual ring System Controller
Subrack contains: 2 System Controller cards 4 High Speed Link cards 4 Processor cards 2 Front panels + LCD
displays
WCS Operations Training: Operations Procedures04/10/23
Slide number 17
Layout of the System Controller Subrack
WCS Operations Training: Operations Procedures04/10/23
Slide number 18
How do Subracks Communicate? All communication inside the rack is via fibre optics All data and control signals are passed along fibres
This gives speed and bandwidth 125 Mbits/sec
All Subracks are interlinked in a fibre optic ring Second ring gives added protection against component failure
High Speed Link (HSL) cards in each Subrack act as links in this chain
WCS Operations Training: Operations Procedures04/10/23
Slide number 19
Rack/Subrack Communications
The main communications ring is handled by the Active Controller (A ring)
The secondary communications ring is handled by the Passive Controller (B ring)
The HSL cards provide a virtual link between system components
WCS Operations Training: Operations Procedures04/10/23
Slide number 20
The Processor Subrack
Must contain at least one Processor card and one HSL card
A dual ring WX9020 must contain:
2 Processor cards 2 High Speed Link cards
Fully configured holds 19 Processor cards
WCS Operations Training: Operations Procedures04/10/23
Slide number 21
Layout of the Processor Subrack
WCS Operations Training: Operations Procedures04/10/23
Slide number 22
Processor Card
• Small board (233mm x 280mm) contains:• LED status lights
• 6 transputers - INMOS T4 (60 MIPS)
• 96 Mbytes local RAM (6x16Mb)
• Error correcting DRAM
• DC - DC Voltage converters
• Components are surface-mounted (on both sides of the board) for higher reliability and density.
Front edge
WCS Operations Training: Operations Procedures04/10/23
Slide number 23
The Disk Subrack
Must contain at least two HCDMs, two Processor cards and a HSL card
A fully-configured, dual ring WX9020 contains:
4 HCDMs 4 Processor cards
or 3 Processor cards + 1 PE card
2 High Speed Link cards
WCS Operations Training: Operations Procedures04/10/23
Slide number 24
Layout of the Disk Subrack
Note: slots 4 and 5 can contain either a Processor card or a PE card
WCS Operations Training: Operations Procedures04/10/23
Slide number 25
The High Capacity Disk Module
Contains two disks of 2 Gbytes each
Has two fully-independent SCSI 2 disk controllers
Each controller holds its own processor and 16 Mbytes of RAM
No internal cabling - designed to be hot-pluggable (R4)
WCS Operations Training: Operations Procedures04/10/23
Slide number 26
Data on Disk - RAID 3
Free space
Data disks
Free space
Parity disk
Free space
Free space
Given a cluster of 4 disks, 3 are designated data disks and 1 is designated the parity (or XOR) disk
WCS Operations Training: Operations Procedures04/10/23
Slide number 27
Disk Recreation
At boot-up server will check data and parity disks for consistency
Any inconsistency recorded in error log and the disk(s) recreated automatically
Boot-up operations are configurable Recreation can lengthen the time taken to boot-up Auto disk recreate can be done manually
WCS Operations Training: Operations Procedures04/10/23
Slide number 28
External Connectivity An interface is required to
connect the WX9000 server to the LAN so that it can communicate with clients on the same (or different) network
WCS does this via the WX9000CP communications processor
Provides modem connection CP is a SPARC-based
workstation. Choice of connectivity options. CP channels the SQL queries,
results and data.
LAN
Clients
CPServer
WCS Operations Training: Operations Procedures04/10/23
Slide number 29
WX Server
The RDA Daemon The Daemon provides the communications
software to control the connection between the WX9020 server and the network
CPLAN
Client PC
WCS Operations Training: Operations Procedures04/10/23
Slide number 30
Power Controls Power is switched on/off via a three phase
contactor Controlled by single pole breaker
The breaker contains a voltage-driven trip If auto shutdown enabled, the system can trip the breaker
and so switch off when required Switched power output from the three phase
contactor is distributed to power supplies and battery charging circuits
WCS Operations Training: Operations Procedures04/10/23
Slide number 31
DC Power
Three Farnell PSUs (with in-built redundancy) Generate internal 56v rail AC to each PSU protected by 20amp circuit breaker
Allows live changes 56v negative rail fused with 63amp fuse 56v positive fed via diodes to common bus bar Positive rail tied to Earth
WCS Operations Training: Operations Procedures04/10/23
Slide number 32
In the event of a complete power failure, batteries deliver +48v
Normally draw no current from the system-wide 56v rail Batteries connected in the same way as PSUs
Negative rail fused with 120amp fuse Positive rail fed via diode
Contactor on the +ve rail for disconnect when required Trickle-charge feeds to batteries to maintain charge
level Battery life expectancy = 4 years
Batteries - Overview
WCS Operations Training: Operations Procedures04/10/23
Slide number 33
Power supply on Power Monitor card produces 55.2v for trickle-charge
Powered directly from the AC supply When batteries not fully charged, circuitry switches to
constant-current charging to deliver 2amps WX9020 has in-built circuitry to derive 50v for this charging
Batteries - Charging
WCS Operations Training: Operations Procedures04/10/23
Slide number 34
Monitoring Server Operations
Useful messages on front panel display: During normal running During re-boot sequence
Indicator lights fitted to each card Running / warning lights fitted to HCDMs In software:
Accessing system tables directly using SQL Using WCS front end tool e.g. SQL Console From scripts
WCS Operations Training: Operations Procedures04/10/23
Slide number 35
The Front Panel
Two front panels are fitted to the WX9020 In a dual ring system both front panels are connected
and the LCD displays will indicate current status of server - one each for the A and B ring controllers
Three key switches: Re-boot Operation mode SYS/RACK switch
RE-BOOT
SYS
AUX1
AUX2
RACK
EXT
INT DEBUG
0 1 2 3
WCS Operations Training: Operations Procedures04/10/23
Slide number 36
RE-BOOT
SYS
AUX1
AUX2
RACK
EXT
INT DEBUG
0 1 2 3
The Front Panel
Two-line, liquid-crystal
textual display Reboot key switch
SYS/RACK switch (only
relevant in a multi-rack
system) Disk activity LEDs
Key switch for mode of
operation
WCS Operations Training: Operations Procedures04/10/23
Slide number 37
The Front Panel - Key Switches
Re-boot key Used to re-boot server
SYS/RACK switch Always set to SYS in a single cabinet WX9020
Mode key - used to determine “bootmode” or mode of operation
‘INT’ernal mode is the normal mode of operation DEBUG mode is for diagnostics & remote access ‘EXT’ernal mode is used for installing new versions of
software
WCS Operations Training: Operations Procedures04/10/23
Slide number 38
The LCD Display
Shows useful information about status of server: Software version number always displayed Pages of information are displayed in continuous cycle Updates every ten seconds
P 6: V 3.2.32 Running
Procs: 100 Disks: 8
WCS Operations Training: Operations Procedures04/10/23
Slide number 39
The WhiteCross HelpDesk
WCS Operations Training: Operations Procedures04/10/23
Slide number 42
Questions?
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