Avamar Data Store Gen2
Avamar Data Store Gen3
Avamar Data Store Gen4
Avamar Data Store Gen4S
Avamar Virtual Edition and Avamar Server v5.x
Avamar Virtual Edition and Avamar Server v6.x
Avamar Virtual Edition and Avamar Server v7.x
One of the key goals when administering Avamar is to effectively manage capacity levels on the system.
Running the system in a ‘steady state’, where the amount of incoming and expiring backup data is similar, will allow Avamar to make most efficient use of the storage space available whilst reliably performing daily maintenance activities.
These maintenance activities, (checkpoint creation & validation, garbage collection & stripe crunching), are essential to Avamar’s overall health and availability, including operating within the same storage as the de-duplicated backup data. Hence, it is important to manage the system capacity from both perspectives: to ensure space for both client backups and daily maintenance operations.
This article will discuss these aspects in more detail and help the reader understand and manage both “User Capacity” and “OS Capacity” in addition to the following topics:
- Summarize the types of data stored in the /data* partitions
- Explain why Avamar should not be run close to the User Capacity limit
- List the factors which contribute to checkpoint overhead
- Describe how to monitor data partition utilization
- Describe the symptoms experienced if OS capacity gets out of control
- List typical causes of the MSG_ERR_DISKFULL messag
- Outline the recovery methods used where high OS capacity is impacting normal system operation
- Describe the symptoms experienced if User Capacity exceeds the User capacity limit
- Discuss how to recover from a high User Capacity situation
To learn more, please visit https://support.emc.com/kb/457224