Regd WAS High Availability & Load Balancing
Hi all,
We have two seperate hosts having WAS servers each(central instance in each machine) . We are trying to acheive high availability and Load Balancing mechanism.
Can anyone sugggest me a way in order to acheive this type of scenario.We have central instance on each host . Assume if one central instance on one WAS server fails, the other should take over the failure.
I am not talking abt one central instance in one host and multiple dialog instance in diff hosts.. We need to achieve High availability & Load balancing with this tech infrastructure setup.
Regards
Vasu
Hi,
Please check the following link
for failover you need MSCS(recommended)
http://help.sap.com/saphelp_nw04/helpdata/en/c4/3a644c505211d189550000e829fbbd/frameset.htm
regards
anand.M
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Hello,
I have been tasked with ACE configuration at work as the prior go-to guy for load balancing is no longer available. Trouble is, I have little idea what I’m doing when it comes to the ACE. So, forgive me if the question I have is super basic. After doing some research I put together a LB config, but its not working.
I was trying to load balance 10 servers, split into groups of 2 using 5 VIPS (1 VIP for each group of 2 servers). The servers serve an ssl web app.
Below is my configuration. What am I doing wrong? Does the config have any glaring errors? I've been staring at this thing on and off for a week and searching these forums trying to figure it out.
Any help provided will greatly appreciated.
probe tcp probe_443
port 443
interval 30
passdetect interval 5
probe https probe_https_test
interval 30
passdetect interval 5
ssl version all
request method get url /test.html
expect status 200 200
rserver host QA-1.1
ip address 10.200.162.126
inservice
rserver host QA-1.2
ip address 10.200.162.127
inservice
rserver redirect QA-group_1_redirect_rserver
webhost-redirection https://10.37.5.73/ 302
inservice
rserver host QA-2.1
ip address 10.200.162.22
inservice
rserver host QA-2.2
ip address 10.200.162.240
inservice
rserver redirect QA-group_2_redirect_rserver
webhost-redirection https://10.37.5.74/ 302
inservice
rserver host QA-3.1
ip address 10.200.162.181
inservice
rserver host QA-3.2
ip address 10.200.162.50
inservice
rserver redirect QA-group_3_redirect_rserver
webhost-redirection https://10.37.5.75/ 302
inservice
rserver host QA-4.1
ip address 10.200.162.23
inservice
rserver host QA-4.2
ip address 10.200.162.241
inservice
rserver redirect QA-group_4_redirect_rserver
webhost-redirection https://10.37.5.76/ 302
inservice
rserver host QA-5.1
ip address 10.200.162.182
inservice
rserver host QA-5.2
ip address 10.200.162.51
inservice
rserver redirect QA-group_5_redirect_rserver
webhost-redirection https://10.37.5.77/ 302
inservice
serverfarm host SF_QA-group_1_HTTPS
failaction reassign
predictor leastconns
probe probe_443
probe probe_https_test
rserver QA-1.1 443
inservice
rserver QA-1. 2 443
inservice
serverfarm host SF_QA-group_2_HTTPS
failaction reassign
predictor leastconns
probe probe_443
probe probe_https_test
rserver QA-2.1 443
inservice
rserver QA-2. 2 443
inservice
serverfarm host SF_QA-group_3_HTTPS
failaction reassign
predictor leastconns
probe probe_443
probe probe_https_test
rserver QA-3.1 443
inservice
rserver QA-3. 2 443
inservice
serverfarm host SF_QA-group_4_HTTPS
failaction reassign
predictor leastconns
probe probe_443
probe probe_https_test
rserver QA-4.1 443
inservice
rserver QA-4. 2 443
inservice
serverfarm host SF_QA-group_5_HTTPS
failaction reassign
predictor leastconns
probe probe_443
probe probe_https_test
rserver QA-5.1 443
inservice
rserver QA-5. 2 443
inservice
serverfarm redirect SF_ QA-group_1_REDIRECT
rserver QA-group_1_redirect_rserver
inservice
serverfarm redirect SF_ QA-group_2_REDIRECT
rserver QA-group_2_redirect_rserver
inservice
serverfarm redirect SF_ QA-group_3_REDIRECT
rserver QA-group_3_redirect_rserver
inservice
serverfarm redirect SF_ QA-group_4_REDIRECT
rserver QA-group_4_redirect_rserver
inservice
serverfarm redirect SF_ QA-group_5_REDIRECT
rserver QA-group_5_redirect_rserver
inservice
sticky ip-netmask 255.255.255.255 address source SRC_ QA-group_1_STICKY
serverfarm SF_ QA-group_1_HTTPS
timeout 30
replicate sticky
sticky ip-netmask 255.255.255.255 address source SRC_ QA-group_2_STICKY
serverfarm SF_ QA-group_2_HTTPS
timeout 30
replicate sticky
sticky ip-netmask 255.255.255.255 address source SRC_ QA-group_3_STICKY
serverfarm SF_ QA-group_3_HTTPS
timeout 30
replicate sticky
sticky ip-netmask 255.255.255.255 address source SRC_ QA-group_4_STICKY
serverfarm SF_ QA-group_4_HTTPS
timeout 30
replicate sticky
sticky ip-netmask 255.255.255.255 address source SRC_ QA-group_5_STICKY
serverfarm SF_ QA-group_5_HTTPS
timeout 30
replicate sticky
class-map match-all QA-group_1_HTTP
3 match virtual-address 10.37.5.73 tcp eq www
class-map match-all QA-group_1_HTTPS
3 match virtual-address 10.37.5.73 tcp eq https
class-map match-all QA-group_2_HTTP
3 match virtual-address 10.37.5.74 tcp eq www
class-map match-all QA-group_2_HTTPS
3 match virtual-address 10.37.5.74 tcp eq https
class-map match-all QA-group_3_HTTP
3 match virtual-address 10.37.5.75 tcp eq www
class-map match-all QA-group_3_HTTPS
3 match virtual-address 10.37.5.75 tcp eq https
class-map match-all QA-group_4_HTTP
3 match virtual-address 10.37.5.76 tcp eq www
class-map match-all QA-group_4_HTTPS
3 match virtual-address 10.37.5.76 tcp eq https
class-map match-all QA-group_5_HTTPS
3 match virtual-address 10.37.5.77 tcp eq www
class-map match-all QA-group_5_HTTPS
3 match virtual-address 10.37.5.77 tcp eq https
class-map type management match-any remote-management
2 match protocol http any
3 match protocol https any
4 match protocol icmp any
5 match protocol snmp any
6 match protocol ssh any
policy-map type management first-match remote-access
class remote-management
permit
policy-map type loadbalance first-match QA-group_1_REDIRECT
class class-default
serverfarm SF_ QA-group_1_REDIRECT
policy-map type loadbalance first-match QA-group_2_REDIRECT
class class-default
serverfarm SF_ QA-group_2_REDIRECT
policy-map type loadbalance first-match QA-group_3_REDIRECT
class class-default
serverfarm SF_ QA-group_3_REDIRECT
policy-map type loadbalance first-match QA-group_4_REDIRECT
class class-default
serverfarm SF_ QA-group_4_REDIRECT
policy-map type loadbalance first-match QA-group_5_REDIRECT
class class-default
serverfarm SF_ QA-group_5_REDIRECT
policy-map multi-match SERVICE_VIPS
class QA-group_1_HTTPS
loadbalance vip inservice
loadbalance policy HTTPS_ QA-group_1_HTTPS _L7_BALANCED
loadbalance vip icmp-reply
nat dynamic 1 vlan 25
class QA-group_1_HTTP
loadbalance vip inservice
loadbalance policy QA-group_1_REDIRECT
class QA-group_2_HTTPS
loadbalance vip inservice
loadbalance policy HTTPS_ QA-group_2_HTTPS _L7_BALANCED
loadbalance vip icmp-reply
nat dynamic 1 vlan 25
class QA-group_2_HTTP
loadbalance vip inservice
loadbalance policy QA-group_2_REDIRECT
class QA-group_3_HTTPS
loadbalance vip inservice
loadbalance policy HTTPS_ QA-group_3_HTTPS _L7_BALANCED
loadbalance vip icmp-reply
nat dynamic 1 vlan 25
class QA-group_3_HTTP
loadbalance vip inservice
loadbalance policy QA-group_3_REDIRECT
class QA-group_4_HTTPS
loadbalance vip inservice
loadbalance policy HTTPS_ QA-group_4_HTTPS _L7_BALANCED
loadbalance vip icmp-reply
nat dynamic 1 vlan 25
class QA-group_4_HTTP
loadbalance vip inservice
loadbalance policy QA-group_4_REDIRECT
class QA-group_5_HTTPS
loadbalance vip inservice
loadbalance policy HTTPS_ QA-group_4_HTTPS _L7_BALANCED
loadbalance vip icmp-reply
nat dynamic 1 vlan 25
class QA-group_5_HTTP
loadbalance vip inservice
loadbalance policy QA-group_4_REDIRECT
interface vlan 25
ip address 10.37.5.72 255.255.255.0
access-group input everyone
service-policy input remote-access
service-policy input SERVICE_VIPS
no shutdown
ip route 0.0.0.0 0.0.0.0 10.37.5.1Fnu,
Thank you so much for your reply.
At this point I can get to the real server IP's via ping and https in a browser from my PC. I can also ping the gateway and all the real server IP's from the ACE context i'm working on. However, the VIPS are not working. When I attempt to use one of the VIPS in the browser, the request times out. When I issue the command ":show service-policy" I see a hit count (which increments every time I try and reach the VIP via the browser) but the dropped counter is equal to the hit counter. I will paste the running config from the context I’m working in along with the output from the show service-policy command.
Any suggestions on how I can get this working would be greatly appreciated.
csc# show run
Generating configuration....
access-list Servers line 3 extended permit tcp any any eq https
access-list Servers line 5 extended permit tcp any any eq www
access-list everyone line 1 extended permit ip any any
access-list everyone line 2 extended permit icmp any any
probe tcp probe_443
port 443
interval 30
passdetect interval 5
rserver host QA-1.1
ip address 10.37.5.111
inservice
rserver host QA-1.2
ip address 10.37.5.88
inservice
rserver host QA-2.1
ip address 10.37.5.84
inservice
rserver host QA-2.2
ip address 10.37.5.89
inservice
rserver host QA-3.1
ip address 10.37.5.85
inservice
rserver host QA-3.2
ip address 10.37.5.90
inservice
rserver host QA-4.1
ip address 10.37.5.86
inservice
rserver host QA-4.2
ip address 10.37.5.81
inservice
rserver host QA-5.1
ip address 10.37.5.87
inservice
rserver host QA-5.2
ip address 10.37.5.92
inservice
rserver redirect QA-group_1_redirect_rserver
webhost-redirection https://10.37.5.93/ 302
inservice
rserver redirect QA-group_2_redirect_rserver
webhost-redirection https://10.37.5.94/ 302
inservice
rserver redirect QA-group_3_redirect_rserver
webhost-redirection https://10.37.5.95/ 302
inservice
rserver redirect QA-group_4_redirect_rserver
webhost-redirection https://10.37.5.96/ 302
inservice
rserver redirect QA-group_5_redirect_rserver
webhost-redirection https://10.37.5.97/ 302
inservice
serverfarm host SF_QA-group_1_HTTPS
failaction reassign
predictor leastconns
probe probe_443
rserver QA-1.1 443
inservice
rserver QA-1.2 443
inservice
serverfarm redirect SF_QA-group_1_REDIRECT
rserver QA-group_1_redirect_rserver
inservice
serverfarm host SF_QA-group_2_HTTPS
failaction reassign
predictor leastconns
probe probe_443
rserver QA-2.1 443
inservice
rserver QA-2.2 443
inservice
serverfarm redirect SF_QA-group_2_REDIRECT
rserver QA-group_2_redirect_rserver
inservice
serverfarm host SF_QA-group_3_HTTPS
failaction reassign
predictor leastconns
probe probe_443
rserver QA-3.1 443
inservice
rserver QA-3.2 443
inservice
serverfarm redirect SF_QA-group_3_REDIRECT
rserver QA-group_3_redirect_rserver
inservice
serverfarm host SF_QA-group_4_HTTPS
failaction reassign
predictor leastconns
probe probe_443
rserver QA-4.1 443
inservice
rserver QA-4.2 443
inservice
serverfarm redirect SF_QA-group_4_REDIRECT
rserver QA-group_4_redirect_rserver
inservice
serverfarm host SF_QA-group_5_HTTPS
failaction reassign
predictor leastconns
probe probe_443
rserver QA-5.1 443
inservice
rserver QA-5.2 443
inservice
serverfarm redirect SF_QA-group_5_REDIRECT
rserver QA-group_5_redirect_rserver
inservice
serverfarm host SF_QA-group_HTTPS
serverfarm host SF_QA-group__HTTPS
sticky ip-netmask 255.255.255.255 address source SRC_QA-group_1_STICKY
serverfarm SF_QA-group_1_HTTPS
timeout 30
replicate sticky
sticky ip-netmask 255.255.255.255 address source SRC_QA-group_2_STICKY
serverfarm SF_QA-group_2_HTTPS
timeout 30
replicate sticky
sticky ip-netmask 255.255.255.255 address source SRC_QA-group_3_STICKY
serverfarm SF_QA-group_3_HTTPS
timeout 30
replicate sticky
sticky ip-netmask 255.255.255.255 address source SRC_QA-group_4_STICKY
serverfarm SF_QA-group_4_HTTPS
timeout 30
replicate sticky
sticky ip-netmask 255.255.255.255 address source SRC_QA-group_5_STICKY
serverfarm SF_QA-group_5_HTTPS
timeout 30
replicate sticky
class-map match-all QA-group_1_HTTP
3 match virtual-address 10.37.5.93 tcp eq www
class-map match-all QA-group_1_HTTPS
3 match virtual-address 10.37.5.93 tcp eq https
class-map match-all QA-group_2_HTTP
3 match virtual-address 10.37.5.94 tcp eq www
class-map match-all QA-group_2_HTTPS
3 match virtual-address 10.37.5.94 tcp eq https
class-map match-all QA-group_3_HTTP
3 match virtual-address 10.37.5.95 tcp eq www
class-map match-all QA-group_3_HTTPS
3 match virtual-address 10.37.5.95 tcp eq https
class-map match-all QA-group_4_HTTP
3 match virtual-address 10.37.5.96 tcp eq www
class-map match-all QA-group_4_HTTPS
3 match virtual-address 10.37.5.76 tcp eq https
class-map match-all QA-group_5_HTTP
3 match virtual-address 10.37.5.97 tcp eq www
class-map match-all QA-group_5_HTTPS
3 match virtual-address 10.37.5.97 tcp eq https
class-map type management match-any remote-management
2 match protocol http any
3 match protocol https any
4 match protocol icmp any
5 match protocol snmp any
6 match protocol ssh any
policy-map type management first-match remote-access
class remote-management
permit
policy-map type loadbalance first-match QA-group_1_REDIRECT
class class-default
policy-map type loadbalance first-match QA-group_2_REDIRECT
class class-default
serverfarm SF_QA-group_2_REDIRECT
policy-map type loadbalance first-match QA-group_3_REDIRECT
class class-default
serverfarm SF_QA-group_3_REDIRECT
policy-map type loadbalance first-match QA-group_4_REDIRECT
class class-default
serverfarm SF_QA-group_4_REDIRECT
policy-map type loadbalance first-match QA-group_5_REDIRECT
class class-default
serverfarm SF_QA-group_5_REDIRECT
policy-map multi-match SERVICE_VIPS
class QA-group_1_HTTPS
loadbalance vip inservice
loadbalance policy QA-group_1_REDIRECT
loadbalance vip icmp-reply
class QA-group_1_HTTP
loadbalance vip inservice
loadbalance policy QA-group_1_REDIRECT
class QA-group_2_HTTPS
loadbalance vip inservice
loadbalance policy QA-group_2_REDIRECT
loadbalance vip icmp-reply
class QA-group_2_HTTP
loadbalance vip inservice
loadbalance policy QA-group_2_REDIRECT
class QA-group_3_HTTPS
loadbalance vip inservice
loadbalance policy QA-group_3_REDIRECT
loadbalance vip icmp-reply
class QA-group_3_HTTP
loadbalance vip inservice
loadbalance policy QA-group_3_REDIRECT
class QA-group_4_HTTPS
loadbalance vip inservice
loadbalance policy QA-group_4_REDIRECT
loadbalance vip icmp-reply
class QA-group_4_HTTP
loadbalance vip inservice
loadbalance policy QA-group_4_REDIRECT
class QA-group_5_HTTPS
loadbalance vip inservice
loadbalance policy QA-group_5_REDIRECT
loadbalance vip icmp-reply
class QA-group_5_HTTP
loadbalance vip inservice
loadbalance policy QA-group_5_REDIRECT
interface vlan 25
ip address 10.37.5.98 255.255.255.0
access-group input everyone
service-policy input remote-access
service-policy input SERVICE_VIPS
no shutdown
ip route 0.0.0.0 0.0.0.0 10.37.5.1
csc# show service-policy SERVICE_VIPS
Status : ACTIVE
Interface: vlan 25
service-policy: SERVICE_VIPS
class: QA-group_1_HTTPS
loadbalance:
L7 loadbalance policy: QA-group_1_REDIRECT
VIP Route Metric : 77
VIP Route Advertise : DISABLED
VIP ICMP Reply : ENABLED
VIP state: OUTOFSERVICE
VIP DWS state: DWS_DISABLED
Persistence Rebalance: DISABLED
curr conns : 0 , hit count : 122
dropped conns : 122
conns per second : 0
client pkt count : 122 , client byte count: 6164
server pkt count : 0 , server byte count: 0
conn-rate-limit : 0 , drop-count : 0
bandwidth-rate-limit : 0 , drop-count : 0
compression:
bytes_in : 0 bytes_out : 0
Compression ratio : 0.00%
Gzip: 0 Deflate: 0
compression errors:
User-Agent : 0 Accept-Encoding : 0
Content size: 0 Content type : 0
Not HTTP 1.1: 0 HTTP response error: 0
Others : 0
class: QA-group_1_HTTP
loadbalance:
L7 loadbalance policy: QA-group_1_REDIRECT
VIP Route Metric : 77
VIP Route Advertise : DISABLED
VIP ICMP Reply : DISABLED
VIP state: OUTOFSERVICE
VIP DWS state: DWS_DISABLED
Persistence Rebalance: DISABLED
curr conns : 0 , hit count : 58
dropped conns : 58
conns per second : 0
client pkt count : 58 , client byte count: 3628
server pkt count : 0 , server byte count: 0
conn-rate-limit : 0 , drop-count : 0
bandwidth-rate-limit : 0 , drop-count : 0
compression:
bytes_in : 0 bytes_out : 0
Compression ratio : 0.00%
Gzip: 0 Deflate: 0
compression errors:
User-Agent : 0 Accept-Encoding : 0
Content size: 0 Content type : 0
Not HTTP 1.1: 0 HTTP response error: 0
Others : 0
class: QA-group_2_HTTPS
loadbalance:
L7 loadbalance policy: QA-group_2_REDIRECT
VIP Route Metric : 77
VIP Route Advertise : DISABLED
VIP ICMP Reply : ENABLED
VIP State: INSERVICE
VIP DWS state: DWS_DISABLED
Persistence Rebalance: ENABLED
curr conns : 0 , hit count : 13
dropped conns : 0
conns per second : 0
client pkt count : 74 , client byte count: 7648
server pkt count : 0 , server byte count: 0
conn-rate-limit : 0 , drop-count : 0
bandwidth-rate-limit : 0 , drop-count : 0
compression:
bytes_in : 0 bytes_out : 0
Compression ratio : 0.00%
Gzip: 0 Deflate: 0
compression errors:
User-Agent : 0 Accept-Encoding : 0
Content size: 0 Content type : 0
Not HTTP 1.1: 0 HTTP response error: 0
Others : 0
class: QA-group_2_HTTP
loadbalance:
L7 loadbalance policy: QA-group_2_REDIRECT
VIP Route Metric : 77
VIP Route Advertise : DISABLED
VIP ICMP Reply : DISABLED
VIP State: INSERVICE
VIP DWS state: DWS_DISABLED
Persistence Rebalance: ENABLED
curr conns : 0 , hit count : 3
dropped conns : 0
conns per second : 0
client pkt count : 12 , client byte count: 1398
server pkt count : 0 , server byte count: 0
conn-rate-limit : 0 , drop-count : 0
bandwidth-rate-limit : 0 , drop-count : 0
compression:
bytes_in : 0 bytes_out : 0
Compression ratio : 0.00%
Gzip: 0 Deflate: 0
compression errors:
User-Agent : 0 Accept-Encoding : 0
Content size: 0 Content type : 0
Not HTTP 1.1: 0 HTTP response error: 0
Others : 0
class: QA-group_3_HTTPS
loadbalance:
L7 loadbalance policy: QA-group_3_REDIRECT
VIP Route Metric : 77
VIP Route Advertise : DISABLED
VIP ICMP Reply : ENABLED
VIP State: INSERVICE
VIP DWS state: DWS_DISABLED
Persistence Rebalance: ENABLED
curr conns : 0 , hit count : 34
dropped conns : 0
conns per second : 0
client pkt count : 201 , client byte count: 23495
server pkt count : 0 , server byte count: 0
conn-rate-limit : 0 , drop-count : 0
bandwidth-rate-limit : 0 , drop-count : 0
compression:
bytes_in : 0 bytes_out : 0
Compression ratio : 0.00%
Gzip: 0 Deflate: 0
compression errors:
User-Agent : 0 Accept-Encoding : 0
Content size: 0 Content type : 0
Not HTTP 1.1: 0 HTTP response error: 0
Others : 0
class: QA-group_3_HTTP
loadbalance:
L7 loadbalance policy: QA-group_3_REDIRECT
VIP Route Metric : 77
VIP Route Advertise : DISABLED
VIP ICMP Reply : DISABLED
VIP State: INSERVICE
VIP DWS state: DWS_DISABLED
Persistence Rebalance: ENABLED
curr conns : 0 , hit count : 5
dropped conns : 0
conns per second : 0
client pkt count : 20 , client byte count: 1907
server pkt count : 0 , server byte count: 0
conn-rate-limit : 0 , drop-count : 0
bandwidth-rate-limit : 0 , drop-count : 0
compression:
bytes_in : 0 bytes_out : 0
Compression ratio : 0.00%
Gzip: 0 Deflate: 0
compression errors:
User-Agent : 0 Accept-Encoding : 0
Content size: 0 Content type : 0
Not HTTP 1.1: 0 HTTP response error: 0
Others : 0
class: QA-group_4_HTTPS
loadbalance:
L7 loadbalance policy: QA-group_4_REDIRECT
VIP Route Metric : 77
VIP Route Advertise : DISABLED
VIP ICMP Reply : ENABLED
VIP State: INSERVICE
VIP DWS state: DWS_DISABLED
Persistence Rebalance: ENABLED
curr conns : 0 , hit count : 0
dropped conns : 0
conns per second : 0
client pkt count : 0 , client byte count: 0
server pkt count : 0 , server byte count: 0
conn-rate-limit : 0 , drop-count : 0
bandwidth-rate-limit : 0 , drop-count : 0
compression:
bytes_in : 0 bytes_out : 0
Compression ratio : 0.00%
Gzip: 0 Deflate: 0
compression errors:
User-Agent : 0 Accept-Encoding : 0
Content size: 0 Content type : 0
Not HTTP 1.1: 0 HTTP response error: 0
Others : 0
class: QA-group_4_HTTP
loadbalance:
L7 loadbalance policy: QA-group_4_REDIRECT
VIP Route Metric : 77
VIP Route Advertise : DISABLED
VIP ICMP Reply : DISABLED
VIP State: INSERVICE
VIP DWS state: DWS_DISABLED
Persistence Rebalance: ENABLED
curr conns : 0 , hit count : 2
dropped conns : 0
conns per second : 0
client pkt count : 8 , client byte count: 697
server pkt count : 0 , server byte count: 0
conn-rate-limit : 0 , drop-count : 0
bandwidth-rate-limit : 0 , drop-count : 0
compression:
bytes_in : 0 bytes_out : 0
Compression ratio : 0.00%
Gzip: 0 Deflate: 0
compression errors:
User-Agent : 0 Accept-Encoding : 0
Content size: 0 Content type : 0
Not HTTP 1.1: 0 HTTP response error: 0
Others : 0
class: QA-group_5_HTTPS
loadbalance:
L7 loadbalance policy: QA-group_5_REDIRECT
VIP Route Metric : 77
VIP Route Advertise : DISABLED
VIP ICMP Reply : ENABLED
VIP State: INSERVICE
VIP DWS state: DWS_DISABLED
Persistence Rebalance: ENABLED
curr conns : 0 , hit count : 0
dropped conns : 0
conns per second : 0
client pkt count : 0 , client byte count: 0
server pkt count : 0 , server byte count: 0
conn-rate-limit : 0 , drop-count : 0
bandwidth-rate-limit : 0 , drop-count : 0
compression:
bytes_in : 0 bytes_out : 0
Compression ratio : 0.00%
Gzip: 0 Deflate: 0
compression errors:
User-Agent : 0 Accept-Encoding : 0
Content size: 0 Content type : 0
Not HTTP 1.1: 0 HTTP response error: 0
Others : 0
class: QA-group_5_HTTP
loadbalance:
L7 loadbalance policy: QA-group_5_REDIRECT
VIP Route Metric : 77
VIP Route Advertise : DISABLED
VIP ICMP Reply : DISABLED
VIP State: INSERVICE
VIP DWS state: DWS_DISABLED
Persistence Rebalance: ENABLED
curr conns : 0 , hit count : 0
dropped conns : 0
conns per second : 0
client pkt count : 0 , client byte count: 0
server pkt count : 0 , server byte count: 0
conn-rate-limit : 0 , drop-count : 0
bandwidth-rate-limit : 0 , drop-count : 0
compression:
bytes_in : 0 bytes_out : 0
Compression ratio : 0.00%
Gzip: 0 Deflate: 0
compression errors:
User-Agent : 0 Accept-Encoding : 0
Content size: 0 Content type : 0
Not HTTP 1.1: 0 HTTP response error: 0
Others : 0 -
WAE Inline Adapter and High Availability
What is the recommendation to achieve high availability (and load sharing?) using two WAE's in a DC with inline adapters being used for interception rather than WCCPv2? Any ideas greatly appreciated.
Ken,
Generally I would recommend interception with either WCCP or a L4-7 load balancer like ACE/ACE Appliance/CSM. Both of these are considered best practice for DC deployments as they both can handle high amounts of traffic, can handle WAEs going offline and can load balance many WAEs in a cluster. WCCP might be slightly more flexible where and how you can deploy it.
Both of the following interception techniques are not recommended for data centers, but I list just as FYI:
- Inline cards in appliances can be configured in serial to give you high availability, but you don't get load balancing. The second appliance only starts optimizing traffic once the first WAE starts passing traffic through on overload. Inline interception is usually used for remote offices, however it has been deployed in DCs.
- PBR can be configured for high availability with next-hop features, however there is no available load balancing. The first WAE has to fail completely and then a second WAE can come into play. Overloaded traffic is not optimized at all.
Hope that helps,
Dan -
Load balancing and High Availability topology
Our Forms 6i client-server application currently runs on Citrix farm of 20 Windows 2000 boxes (IBM Blade Servers 2 CPU and 2 Gig Memory).
Application supports 2000 users.
We are moving to AS 10g r2, forms 10g and the goal is to use same hardware, 20 Windows boxes (or less), for intranet web deployment.
What will be our best choices for application Load balancing and High Availability?
Hardware load balancer, Web Cache, mod-oc4j? Combinations?
Any suggestions, best practices, your experience?Gerd, I understand, that you are running 10g web forms through the browser, but using Citrix for deployment. This means that in addition to Application Server and Forms runtime sessions, it will be separate browser session opened for each user. What the advantage of this configuration?
Michael, we are aware, that Citrix is not supported by Oracle as a deployment platform. That only means that prior contacting Oracle Support we have to reproduce the problem in standard environment. It was never been a problem to reproduce problem :) We were using Citrix as a deployment platform for Forms 6i client/server for 4 years, but now we are forced to upgrade to 10g.
We are familiar with various Load balancing options available. The question is which option is the most "workable" in our case. -
For a true load balancing and high-availability OHS, OPMN, and mod_oc4j
i have read this link of Enabling Clustering on oc4j9.0.4 standalone app server
http://www.oracle.com/technology/docs/tech/java/oc4j/htdocs/getstart.htm#1015479
To test the clustering, start up the load balancer by executing "java -jar loadbalancer.jar".
C:\OC4J_EXTENDED\j2ee\home>java -jar loadbalancer.jar
In a future release of Oracle Application Server, loadbalancer.jar will be
desupported. Because of this, we strongly suggest that you discontinue your use
of loadbalancer.jar in this release. Under high loads, loadbalancer.jar may not
function properly. For a true load balancing and high-availability solution,
please move to use OHS, OPMN, and mod_OC4J. For more information, please see
http://otn.oracle.com/products/ias/ohs/content.html
Balancer initialized...
what load balancer should i use for web clustering
<frontend host="balancer-host" port="balancer-port" />
balancer-host=localhost
balancer-port=80
for all nodes i mentioned same host and port in http-web-site.xml.Is it correct?
i completed all the steps and run http://localhost:6666/session/SessionServlet
i hit 3 times
in the different browser http://localhost:7777/session/SessionServlet
instead of coming 4 it starting from 1 only.can i use this loadbalancer.jar or not?
how to mod_oc4j in standalone app server -
Windows Event Collector - Built-in options for load balancing and high availability ?
Hello,
I have a working collector. config is source initiated, and pushed by GPO.
I would like to deploy a second collector for high availability and load balancing. What are the available options ? I have not found any guidance on TechNet articles.
As a low cost option, is it fine to simply start using DNS round-robin with a common alias for both servers pushed as a collector name through GPO ?
In my GPO Policy, if I individually declare both servers, events are forwarded twice, once for each server. Indeed it does cover high availability, but not really optimized.
Thanks for your help.Hi,
>>As a low cost option, is it fine to simply start using DNS round-robin with a common alias for both servers pushed as a collector name through GPO ?
Based on the description, we can utilize DNS round robin to distribute workloads and increase fault tolerance. By default, DNS uses round robin to rotate the order of RR data returned in query answers where multiple RRs of the same type exist for a queried
DNS domain name. This feature provides a simple method for load balancing client use of Web servers and other frequently queried multihomed computers. Besides, by default, DNS will perform round-robin rotation for all RR types.
Regarding DNS round robin, the following article can be referred to for more information.
Configuring round robin
http://technet.microsoft.com/en-us/library/cc787484(v=ws.10).aspx
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If you are TechNet Subscription user and have any feedback on our support quality, please send your feedback here.
Best regards,
Frank Shen -
High Availability and load balancing
Hi,
I have 6513 catalyst with redundant sup720 and msfc. All the servers are connected to this switch and there is no vlan configuration. Here is the hardware config of the box.
Mod Slot Ports Module-Type Model Sub Stat
1 1 48 10/100/1000BaseT Ethernet WS-X6148-GE-TX no ok
2 2 48 10/100BaseTX Ethernet WS-X6148-RJ-45 no ok
3 3 48 10/100BaseTX Ethernet WS-X6148-RJ-45 no ok
4 4 48 10/100BaseTX Ethernet WS-X6148-RJ-45 no ok
5 5 48 10/100BaseTX Ethernet WS-X6148-RJ-45 no ok
6 6 48 10/100BaseTX Ethernet WS-X6148-RJ-45 no ok
7 7 2 1000BaseX Supervisor WS-SUP720-BASE yes ok
15 7 1 Multilayer Switch Feature WS-SUP720 no ok
8 8 2 1000BaseX Supervisor WS-SUP720-BASE yes
I want to introduce a new 6513 chassis with same knid of configuration. Please help me out to configure these boxes to provide the high availabilty as well as load balancing for the server farm. Do I need to do any thing on the servers in terms of hwardare / software requirment to achieve the objective.
thnaks & regards
shalabhThe config is the same for both switches:
(this will enable port channel bundle, you can specify upto 16 ports..i would recommend 10)
(config-if#)interface range gigabitethernet 1/1-2
(config-if#)Description PORT-CHANNEL Interface
(config-if#)switchport
(config-if#)channel-group 1 mode on
(config-if#)switchport trunk encapsulation dot1q
(config-if#)switchport mode trunk
(config-if#)speed 1000
(config-if#)no shutdown
(Enable SRM SSO)
router(config)#redundancy
router(config-red)#mode sso
router(config-red)#end
router#show redundancy states
you should see my state = active
peer state = standby hot
where are your users come into the 6500's? if they are sitting on the 6500's I would recommend putting them in a separate vlan. -
SharePoint Central Administration: High Availability and Load Balancing
Running Central Administration on more than one server in the farm is 100% supported and indeed a recommended best practice on SharePoint 2010.
Is Load Balancing on Central Administration
supported for SharePoint 2013?
Is Implementing Kerberos Authentication for load balanced Central Administration 100% supported in SharePoint 2013?
Is Implementing Central Administration on Port 80 or 443 100% supported on SharePoint 2013?
I’ve read a article about from Spence
Harbar. I would like to know of this is supported for SharePoint 2013?
Source:
http://www.harbar.net/articles/spca.aspx
jtjscholtenThanks! Disappointed there is no description from Microsoft :(
jtjscholten -
Multiple dgraph clustering (load balancing) OOTB available?
Hello,
We have 2 dgraphs running in parallel having the same data to share the load of the clients.
I would like to know if there is any OOTB solution provided by Endeca where in these two dgraphs can share the load. OR I need to use an external load balancer for the same?
If there is any document that explains the configuration for OOTB Endeca solution, please let me know
Thanks!Hi,
yes I know...
i tried to check if they were still available...but found none,
that's why I said if you want me to send them email me ...(I downloaded them from Eden ) and the files aren't too big
regards
Saleh
29/11/12 : copy of the document called Simple MDEX Load Balancing with Apache HTTP Server (Endeca)
Endeca Solution Article Simple MDEX Load Balancing with Apache HTTP Server
Endeca Solution Article
Simple MDEX Load Balancing with Apache HTTP Server
By Robert Dennis
Last Updated: December 2010
Endeca Product Versions: 5.0+
This document describes how to set up a simple load balancing and failover solution using Apache HTTP server. This provides a cost effective mechanism leveraging widely available open source technologies to address simple infrastructure needs. This document includes the following sections:
Introduction
Configuration Steps
References
Endeca Solution Article Simple MDEX Load Balancing with Apache HTTP Server
Endeca Confidential 2 of 5
Introduction
Load balancers are the preferred solution for providing scalability, redundancy, and fail-over for MDEX Engine queries. Typically, load balancing and failover are accomplished with the use of dedicated load balancing hardware. For some Endeca implementations, however, a robust mechanism for load balancing may not be available or required by the customer. For more information on the basics of load balancing an Endeca application, see the “Endeca Load Balancing Best Practices” Solution Article available on EDeN.
This document describes the configuration steps involved in leveraging Apache’s default load balancing mechanisms to provide a simple load balancing solution for an Endeca application. In this scenario, Apache will sit between the Endeca presentation API housed in a web application and redundant MDEX engines. Apache performs the duties of a simple load balancer and failover broker, managing query requests from the application tier to specific MDEX engines.
Configuration Steps
The described configuration leverages Apache 2.2 HTTP Server as the load balancing mechanism between two identical MDEX engines all residing on a single server. The sample configuration expects the Apache HTTP server to be listening on port 5555 and the MDEX engines to be listening on ports 8000 and 8001. These can be changed as appropriate for a given environment.
1. In the Apache httpd.conf, enable the server for listening on port 5555.
Endeca Solution Article Simple MDEX Load Balancing with Apache HTTP Server
Endeca Confidential 3 of 5
2. Enable the following modules by un-commenting the appropriate loadmodule statements in the httpd.conf file. These modules include: mod_proxy, mod_proxy_balancer, mod_proxy_connect, mod_proxy_http, mod_negotiation.
3. Include the httpd-vhosts.conf file by un-commenting the appropriate line in the httpd.conf file.
4. Save the httpd.conf file and open the httpd-vhosts.conf file. Append the below information and save the file.
Endeca Solution Article Simple MDEX Load Balancing with Apache HTTP Server
Endeca Confidential 4 of 5
NameVirtualHost *:5555 <VirtualHost *:5555> ServerName localhost ProxyPass / balancer://dgraphs/ ProxyPassReverse / balancer://dgraphs/ <Proxy balancer://dgraphs> BalancerMember http://localhost:8000 loadfactor=1 retry=0 BalancerMember http://localhost:8001 loadfactor=1 retry=0 </Proxy> </VirtualHost> <Location /balancer-manager> SetHandler balancer-manager </Location>
The “retry” parameter associated with Balance Members disables the period of inactivity for a particular worker after Apache determines it is offline. The default is 60 seconds. It is recommended that this is set to a low number such as 0.
In environments where particular MDEX engines are targeted for additional load, the “loadfactor” parameter associated with Balance Members can be adjusted. Higher values ensure that the load balancing algorithm that is used will route the traffic load accordingly to specific Balance Members.
5. Restart Apache.
6. Within the UI application, configure the host and port of the HttpENEConnection to the host and port of the load balancer (e.g. localhost:5555).
Endeca Solution Article Simple MDEX Load Balancing with Apache HTTP Server
Endeca Confidential 5 of 5
Apache HTTP Server is now properly configured to serve as a load balancer for the MDEX Engines.
References
“Endeca Load Balancing Best Practices” Solution Article (EDeN)
Apache Module mod_proxy
Apache Module mod_proxy_balancer
Apache Module mod_proxy_connect
Apache Module mod_proxy_http
Apache Module mod_negotiation
Edited by: sabdelhalim on Nov 28, 2012 5:46 PM -
Testing Forms Services availability with Hardware Load Balancer
I have posted a question about load balancing to a group of application services running Forms Services here on the Forms forum but have had no reply:
Forms Services availability checking for BIGIP Load Balancer
My basic questions are:
a) What do people recommend for load balancing Forms ... least connection, round robin ... ?
b) Do people use http://server:port/forms/frmservlet?ifcmd=status or have some of you used something else?
My reason for the question is we had a Forms Services failure that was not detected by the ifcmd servlet as the HTTP side of things was still working. This meant that the BIGIP load balancer sent everything to the failed server as it had the least connections. So basically no-one could logon.
I've raised an SR with Oracle but they recommend the standard URL above. Has anyone else had a problem like this and if so were you able to fix it?
Regards,
PhilippeWell SR followed up and it looks like the only course of action is to use the standard HTTP check: http://server:port/forms/frmservlet?ifcmd=status ...
... unless that is you want to do some serious customisation. Oracle don't support any other form of checking.
I'm guessing from the lack of responses to this thread that this hasn't been an issue for anybody else ... ???
Any thoughts/suggestions really welcome as we go into production in 4 weeks.
a) What do people recommend for load balancing Forms ... least connection, round robin ... ?
b) Do people use http://server:port/forms/frmservlet?ifcmd=status or have some of you used something else?
Thanks,
Philippe -
Forms Services availability checking for BIGIP Load Balancer
We are load balancing across a number of 10.1.2.2 Forms servers using a BIGIP load balancer. Currently our load balancing is done based on which server has the "least connections" to the BIGIP. So far we have been using the following test URL to allow BIGIP to check the availability of the Forms Services on each server.
http://server:port/forms/frmservlet?ifcmd=status
This works well however it only checks through to the HTTP level within Forms Services. We encountered a problem when the Forms Services failed to work on a particular server however the above URL showed that everything was OK. The effect of this was that all new users attempting to login were directed to the failed server as this server had the "least number of connections".
After raising an SR with Oracle they advised that the forking of runtime processes had probably failed and this was not detectable by the load balancer with the above URL. So they have recommended a number of options for checking the status of the Forms Services. These are:
a) http://server:port/forms/frmservlet
This loads the default Form and therefore by definition tests the forking of runtime processes. However BIGIP is unable to automatically process the information to distinguish whether the service is up or down. Oracle recommended that if using this method we would need to customise BIGIP to handle the various FRM-xxxx error codes.
b) http://server:port/forms/frmservlet?userid=scott/tiger@YOURDB&form=yourtestform.
fmx
Even more thorough would be to actual log on to the database using a test form as above.
My question is does anyone out there have experience in checking Forms Services availability using these last two methods as I'm not sure how to customize the load balancer so that it can handle the output of these URLs. Also when using the original URL is it normal to load balance using a "least connections" method or do people out there use a different algorithm.
Thanks for any help/advise that you can give.
Regards,
PhilippeWell SR followed up and it looks like the only course of action is to use the standard HTTP check: http://server:port/forms/frmservlet?ifcmd=status ...
... unless that is you want to do some serious customisation. Oracle don't support any other form of checking.
I'm guessing from the lack of responses to this thread that this hasn't been an issue for anybody else ... ???
Any thoughts/suggestions really welcome as we go into production in 4 weeks.
a) What do people recommend for load balancing Forms ... least connection, round robin ... ?
b) Do people use http://server:port/forms/frmservlet?ifcmd=status or have some of you used something else?
Thanks,
Philippe
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