Google Search Appliance Configuring Distributed Crawling and Serving version 6.14 and later - Manual (Page 12)

Google Search Appliance: Configuring Distributed Crawling and Serving 12
3. Click Administration > Reset Index and click Reset the Index Now.
4. Log in to each node and reset the index on each node.
5. On the master node, click GSA n > Configuration.
6. Click the Edit link for the shard configuration that contains the failed node.
7. Delete the node you want to delete.
8. Click Save.
9. Click the GSA
n
Configuration link.
10. Click Apply Configuration. This broadcasts the configuration data to all appliances in the GSA n
network. Note that document serving will be interrupted briefly on the master node after you click
Apply Configuration.
11. Optionally, click Export and save the distributed crawling configuration file to your local computer.
12. On the admin master node, click Status and Reports > Pause Crawl and restart the crawl.
Recovering When a Node Fails
In a distributed crawling and serving configuration, crawling is divided among the different nodes. For
example, if node 1 in a three-node configuration discovers a URL that node 2 should crawl, node 1
forwards the URL to node 2.
When a node in the distributed crawling and serving configuration fails, crawling continues on the
running nodes unless one of the running nodes discovers a URL that the failed node should crawl. At
this point, all crawling stops until the failed node is running again and the link can be forwarded for
crawling.
Recovering from Node Failure When GSA Mirroring is
Enabled
When a primary search appliance fails in a distributed crawling configuration and GSA mirroring is
enabled, promote a mirror node to primary and update the other search appliances in the configuration
by importing a new GSA
n configuration file.
If the primary Google Search Appliance fails and a replica search appliance is promoted to be the
primary, do not directly add the former primary node back as the primary, because this will cause
problems in the mirroring configuration. If you need to use the former primary search appliance as the
primary, add it as a replica of the new primary first. Wait until all index and configuration data are fully
synchronized with the new primary node, and then you can add the search appliance as the primary
again.
When the Failed Node is the Master Node
To recover from a node failure when GSA mirroring is enabled and the failed node is the master node:
1. On all nodes, log in to the Admin Consoles and click Status and Reports > Pause Crawl.
2. On all nodes, click GSA
n
> Configuration and click Disable GSA
n
.