Use the following steps to migrate data from the previous AMS schema to the new AMS schema.
Ensure the Ambari Metrics System is started. If it is not, in the
Ambari Web UI, click Ambari
Metrics, then select Actions >
Start.
SSH into a host that is running a Metrics Collector. You can locate this host
by going to the Ambari Web UI and clicking
Hosts. Click on the Filter
icon and type in "Metrics Collector: All" to find each
host that has a Metrics Collector installed on it.
SU to the Ambari Metrics user. This is 'ams' by default, but if you don’t know
which user is configured in your cluster go to the Ambari Web
UI and click Cluster Admin >
Service Accounts, and then look for Ambari
Metrics User. # su ams
Run the command to migrate data from the old Ambari Metrics schema to the new.
/usr/sbin/ambari-metrics-collector --config /etc/ambari-metrics-collector/conf/ upgrade_start /etc/ambari-metrics-collector/conf/metrics_whitelist "365"
"365" is the amount of days to be preserved and stands for 1 year.
After the upgrade process has started, logs are available in the
<ams-log-dir>/ambari-metrics-migration.log file.
Migrate data from the old Ambari Metrics schema to the new, migrating
metric records that are matching the ones present in the allowlist (whitelist) file from the
last 30 days
