NDMP Performance Drop
I am seeing a performance issue with NDMP backups on an Sun ZFS Storage 7320. I am running NetBackup and backups are going over a 10Gb network to an Oracle SL150 (directly attached to the NetBackup server via Fibre Channel). Trying to backup a share that is around 250GB.
I am seeing good performance at the start of a backup job (~130MB/s) but after the appliance transfers ~8GB the performance drops off to 20-30MB/s. I was watching the analytics inside the appliance and noticed that the ARC operations accessing a snapshot of the share I was backing up dropped off at almost exactly the same time that NDMP MB/s dropped off. This doesn't seem like it would be a coincidence.
I am seeing good performance at the start of a backup job (~130MB/s) but after the appliance transfers ~8GB the performance drops off to 20-30MB/s. I was watching the analytics inside the appliance and noticed that the ARC operations accessing a snapshot of the share I was backing up dropped off at almost exactly the same time that NDMP MB/s dropped off. This doesn't seem like it would be a coincidence.
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