Symptoms
New users were added to Active Directory to access the Datamover.As time goes by and more and more users are added and removed from Active Directory,New Users access the Datamover using Microsoft Windows SID which need to be mapped to UID and GIDThe usermapper database will automatic create a new UID and GID from the Windows SID The usermapper database can get very large.The self healing feature of the Database may not be enough for the nasdb backup to complete and require some extra manual help to compact the nasdb for it to complete.
Cause
New users were added to Active Directory to access the Datamover and therefore the usermapper become very large and could not be backup with out manual help to compact the usemapper database.
Resolution
Here are the stepsRead and understand the stepsif your are not sure, don't run these steps and ask for help from a senior TSE1. login as nasadmin2. How many Datamovers are they all in contact state?/nas/sbin/getreason3. How many Active Datamovers and VDMsnas_server -list -all4. What is current nasdb backup statsdate ; nas_logviewer /nas/log/sys_log | grep backup | tail -205. what is the state of usermapper on the Datamoversserver_usermapper ALL 6. Just in case this is part of NAS IP Replication, is this the source or the destinationIf its the source hopefully, usermapper is configure as secondarynas_cel -listnas_replicate -list7. List size of the directory and files by Date time orderdf -k /celerra/backup/ /nas/var/backup/ls -altr /celerra/backup/ /nas/var/backup/8. What is the size of dbms itemsserver_dbms ALL -db -list |awk -F: '/^Size/ { a+=$2} END { print a}' /nas/sbin/dbms_backup -totalsize 9. Check what time the nasdb runsgrep backup /nas/site/cron.d/nas_sys10. Run the nasdb backup manualy to see the error message/nas/sbin/nasdb_backup /nas /celerra/backup 1 11. Run the following cmds - If there are any failures, stop and consult with a senior TSE server_usermapper server_2 -Export -user /home/nasadmin/usermapper_backup_2016_10_10_userserver_usermapper server_2 -Export -group /home/nasadmin/usermapper_backup_2016_10_10_group server_dbms server_2 -db -compact Usermapper /nas/sbin/dbms_backup -totalsize server_dbms server_2 -db -compact Secmap /nas/sbin/dbms_backup -totalsize 12. Re-run the NASDB backup - did it work?/nas/sbin/nasdb_backup /nas /celerra/backup 1 13. What is current nasdb backup statsdate ; nas_logviewer /nas/log/sys_log | grep backup | tail -2014. List size of the directory and files by Date time order after the compactdf -k /celerra/backup/ /nas/var/backup/ls -altr /celerra/backup/ /nas/var/backup/
