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Tuning Blackboard 9 for high demanded environments
José Manuel López Luján Juan Francisco García García
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Contact Information
• José Manuel López Luján – Email: [email protected] – Twitter: @jmanuel_ll – Blog: http://jm.inextgen-it.com – G+: [email protected]
• Juan Francisco García García – Email: [email protected] – Twitter: @jfgarcia11 – G+: [email protected]
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EXO-ENVIRONMENT
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Tec de Monterrey
91,084 students 8,391 teachers 31 campus 22 sites & interna8onal offices 58 undergraduate programs 42 master degree programs 10 doctorate programs 14,000+ students served by our Virtual University 16,811,469 visits (Jan-‐Jul)*
103,403 ac8ve users (Sep ‘10) 2,321,864 unique visitors
*GOOGLE ANALYTICS & BBSTATS
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WAN Topology
Alestra VPN
260 GB Blackboard throughput/day
Internet
2Mbps ea.
2Mbps ea. Videoconferencing QoS
2 (most), 4, 6, 34 Mbps
68 Mbps > 305 Mbps due to Bb demand
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2009 status Not the same figures Surely an approximate trend
USA México
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Welcome to Region 4! (aka Americas’ 4th World)
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Facts
• We can’t afford to waste even 1 KB or 1 Kbps
• We have to be as efficient as we can • Some actions seem ridiculous: everything helps
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ENDO-ENVIRONMENT
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Infrastructure
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Infrastructure
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Infrastructure
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Blackboard in Tec de Monterrey System
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BRAINWORK (or braindrain)
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Bad Perception
Knowledge & Communication
Compression Op8miza8on
Minifying
Traffic
InMemory Compression
gzip
Client Side Cache Mgmt
Caching
Akamai
Service Outages
Java Memory Mgmt
Accurate Load Balancing
blog
support community
social media
© FUTURAMA: MATT GROENIG, 20TH CENTURY FOX, COMEDY CENTRAL
reqs valida8on
Apache 2.2
Custom Error Pages
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Akamaizing
• Volume���transferred: ���15.7 TB 2010
• Office files • PDFs • Some scripts • Media files
– Audio – Vídeo – Flash
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Web Compression���Enabling
bbconfig.webserver.compression=Yes bbconfig.webserver.compression.level=6 bbconfig.webserver.compression.min.filesize=600 bbconfig.webserver.compression.max.filesize=20000000 bbconfig.webserver.compression.max.filesize.mem=60000
$BB_HOME/config/bb-config.properties
mod_gzip_temp_dir @@bbconfig.basedir@@/system/temp CustomLog @@bbconfig.basedir@@/logs/httpd/mod_gzip.log common_with_mod_gzip_info2
$BB_HOME/apps/httpd/conf/gzip.conf.bb
70% traffic reduc8on
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32 % CPU AVG
.831% CPU AVG
CPU Usage | Network Traffic | User Perception
As is No compression
Default Bb Compression
Network traffic 100%
30%
Bad pe
rcep
8on “ind
ex”
CPU Usage
BPI
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Web Compression���Enabling
bbconfig.webserver.compression=Yes bbconfig.webserver.compression.level=6 bbconfig.webserver.compression.min.filesize=600 bbconfig.webserver.compression.max.filesize=20000000 bbconfig.webserver.compression.max.filesize.mem=60000
$BB_HOME/config/bb-config.properties
mod_gzip_temp_dir @@bbconfig.basedir@@/system/temp CustomLog @@bbconfig.basedir@@/logs/httpd/mod_gzip.log common_with_mod_gzip_info2
$BB_HOME/apps/httpd/conf/gzip.conf.bb
70% traffic reduc8on I/O HDD
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Web Compression
With Gz +W over HDD With Gz +W over RAM No compression
CPU Usage
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Web Compression Threads
With Gz +W over HDD With Gz +W over RAM No compression
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Web Compression
# Working directory for temporary files and the compression cache if not specified, the following default values are used: [Win32=c:\temp], [UNIX=/tmp]
TEMP dir
Mod-gzip_temp_dir /tmp CustomLog "|@@bbconfig.basedir@@/apps/httpd/bin/rotatelogs @@bbconfig.basedir@@/logs/httpd/mod_gzip_log-%Y-%m_%d_%H_%M_%S 3600 -300" common_with_mod_gzip_info2
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6.97 % CPU AVG
32 % CPU AVG
.831% CPU AVG
CPU Usage | Network Traffic | User Perception
As is No compression
Default Bb Compression
(HD)
Memory compression
Network traffic 100%
30%
Bad pe
rcep
8on “ind
ex”
CPU Usage
BPI
BPI
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Default vs Custom Login page Payload with No Compression
Login
News from various sources thru twitter
Guest login
Links to support social Media and related links
Char size + high contrast
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Minifying & compression
648
184.9
419
102.2
763.4
506.5
184.1
146
0 100 200 300 400 500 600 700 800 900
Login Page
Login Page w/gzip
Login Page w/mini
Login Page w/min+gzip
Transfer payload
5 times less overhead! �Multiply it by 66k logins/hour�
Tec de Monterrey
Bb Default
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Client-side Cache Mgmt���
Implement mod_headers and mod_expires modules Apache 1.3: Modify apxs scripts in $BBHOME/apps/httpd/bin
Apache 1.3: Modify add config file in $BBHOME/apps/httpd/conf
LoadModule expires_module libexec/mod_expires.so LoadModule headers_module libexec/mod_headers.so # Turn on Expires and set default to 0 ExpiresActive On ExpiresDefault A0 # Set up caching on media files for 1 year (forever?) <FilesMatch "\.(flv|ico|pdf|avi|mov|ppt|doc|mp3|wmv|wav)$"> ExpiresDefault A29030400 Header append Cache-Control "public" </FilesMatch> # Set up caching on media files for 1 week <FilesMatch "\.(gif|jpg|jpeg|png|swf)$"> ExpiresDefault A604800 Header append Cache-Control "public" </FilesMatch> # Set up caching on commonly updated files for 1 week <FilesMatch "\.(xml|txt|html|js|css)$"> ExpiresDefault A604800 # Header append Cache-Control "proxy-revalidate" Header append Vary Accept-Encoding </FilesMatch> # Force no caching for dynamic files <FilesMatch "\.(php|cgi|pl|htm|jsp|jspf|do)$"> ExpiresActive Off Header set Cache-Control "private, no-cache, no-store, proxy-revalidate, no-transform" Header set Pragma "no-cache" </FilesMatch>
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Tuning TCP/UDP
tcp_conn_req_max_q 2048
tcp_conn_req_max_q0 10240
tcp_smallest_anon_port 1024
tcp_time_wait_interval 60000
tcp_xmit_hiwat 65536
tcp_recv_hiwat 65536
udp_smallest_anon_port 1024
udp_xmit_hiwat 65536
udp_recv_hiwat 65536
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Load Balancing
COOKIE_INSERT_EXPIRATION_DATE 200 minutes Probe HEALTHCHECK_BB
Request to http://APPX.itesm.mx/webapps/portal/healthCheck
Probe TCP8007 Ping TCP 8007
Probe ICMP Probe TCP80
Ping TCP 80
BB9ITESM: cursos.itesm.mx APP2, MaxConn 800, weight 8 APP3, MaxConn 800, weight 8 APP4, MaxConn 800, weight 8 APP5, MaxConn 600, weight 6 APP6, MaxConn 600, weight 6 APP7, MaxConn 600, weight 6
CURSOS-SYNC: cursos-sync.itesm.mx APP5, MaxConn 200, weight 8 APP6, MaxConn 200, weight 8 APP7, MaxConn 200, weight 8
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Apache 2.2���why not?
Requests/second Apache 1.3.41 Apache 2.2.19 Improvement
Image 745 1413 89%
Binary file 149 380 155%
Dynamic content 832 1484 78%
Solaris 10 SPARC, v490, 16G RAM
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Using NUMA���on NUMA-Architecture servers
• 30% (32-bit) to 40% (64-bit) performance improvement
• Turn it on with���-XX:UseNUMA in bbconfig.jvm.options.e
xtra.tomcat parameter in bb-config.properties
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SM Support Strategy
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Custom error pages
ErrorDocument 500 /common/error500.html ErrorDocument 502 /common/error502.html ErrorDocument 503 /common/error503.html ErrorDocument 403 /common/error403.html ErrorDocument 404 /common/error404.html
ErrorDocument 401 /common/error401.html
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Twitter Connect with Twiqer4j
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Requirements validation
inspired in Blackboard Browser Tester b2 by Dr. Malcolm Murray from DU and implemented and modified a JavaScript file which Shannon Meisenheimer from UCMO wrote.
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CA Service Desk Manager Connect
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CA Service Desk Manager Connect
Technical information
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Facebook Newsfeed module
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Please provide feedback for this session by emailing [email protected].
The title of this session is:
Tuning Blackboard 9.x for high demanded environments