Chapter 3 Statistics and Datasets
Determining the impact of a dynamic statistic
Capacity: Capacity Percent Used
Capacity System Pool Bytes Used
Capacity: System Pool Bytes Used
Capacity System Pool Percent Used
Capacity: System Pool Percent Used
Data Movement NDMP Bytes Statistics
Data Movement: NDMP Bytes Statistics
Data Movement NDMP Operations Statistics
Data Movement: NDMP Operations Statistics
Data Movement Replication Bytes
Data Movement: Replication Bytes
Data Movement Replication Operations
Data Movement: Replication Operations
Data Movement Shadow Migration Bytes
Data Movement: Shadow Migration Bytes
Data Movement Shadow Migration Ops
Data Movement: Shadow Migration Ops
Data Movement Shadow Migration Requests
Data Movement: Shadow Migration Requests
Protocol Fibre Channel Operations
Protocol: Fibre Channel Operations
Protocol: HTTP/WebDAV Requests
Data Movement NDMP Bytes Transferred to/from Disk
Data Movement: NDMP Bytes Transferred to/from Disk
Data Movement NDMP Bytes Transferred to/from Tape
Data Movement: NDMP Bytes Transferred to/from Tape
Data Movement NDMP File System Operations
Data Movement: NDMP File System Operations
Data Movement Replication Latencies
Data Movement: Replication Latencies
Disk ZFS Logical I/O Operations
Disk: ZFS Logical I/O Operations
Memory Kernel Memory Lost to Fragmentation
Memory: Kernel Memory Lost to Fragmentation
This statistic shows SFTP Service in Oracle ZFS Storage Appliance Administration Guide bytes/sec requested by clients to the appliance. Various useful breakdowns are available: to show the client, user and filename of the SFTP requests.
See Protocol: FTP bytes for an example of a similar statistic with similar breakdowns.
SFTP bytes/sec can be used as an indication of SFTP load, and can be viewed on the Dashboard in Oracle ZFS Storage Appliance Administration Guide .
The best way to improve performance is to eliminate unnecessary work, which may be identified through the client, user and filename breakdowns, and the filename hierarchy view. It may be best to enable these breakdowns for short periods only: the by-filename breakdown can be one of the most expensive in terms of storage and execution overhead, and may not be suitable to leave enabled permanently on appliances with high rates of SFTP activity.
|
These breakdowns can be combined to produce powerful statistics. For example:
"Protocol: SFTP bytes per second for client 'phobos.sf.fishpong.com' broken down by file name" (to view what files a particular client is accessing)
See Cache: ARC accesses to learn how well an SFTP read workload is returning from cache; and Disk: I/O operations for the back-end disk I/O caused.
Since SFTP uses SSH to encrypt FTP, there will be additional CPU overhead for this protocol. To check overall CPU utilization of the appliance, see CPU: Percent utilization.