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Oracle ZFS Storage Appliance Analytics Guide
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Document Information

Preface

1.  Introduction

2.  Analytics Interface

3.  Statistics and Datasets

Statistics

Introduction

Descriptions

Analytics

Advanced Analytics

Default Statistics

Tasks

Statistics Tasks

CPU Percent utilization

CPU: Percent Utilization

Example

When to check

Breakdowns

Further Analysis

Details

Cache ARC accesses

Cache: ARC accesses

When to check

Breakdowns

Details

Metadata

Prefetch

Further Analysis

Cache L2ARC IO bytes

Cache: L2ARC I/O bytes

When to check

Breakdowns

Further Analysis

Cache L2ARC accesses

Cache: L2ARC accesses

When to check

Breakdowns

Further Analysis

Capacity bytes used

Capacity: Capacity bytes used

When to Check

Breakdowns

Further Analysis

Capacity percent used

Capacity: Capacity percent used

When to Check

Breakdowns

Further Analysis

Capacity system pool bytes used

Capacity: System pool bytes used

When to Check

Breakdowns

Further Analysis

Capacity system pool percent used

Capacity: System pool percent used

When to Check

Breakdowns

Further Analysis

Data Movement NDMP bytes statistics

Data Movement: NDMP bytes statistics

When to check

Breakdowns

Further Analysis

Data Movement NDMP operations statistics

Data Movement: NDMP operations statistics

When to check

Breakdowns

Further Analysis

Data Movement Replication bytes

Data Movement: Replication bytes

When to check

Breakdowns

Further Analysis

Data Movement Replication operations

Data Movement: Replication operations

When to check

Breakdowns

Further Analysis

Data Movement Shadow migration bytes

Data Movement: Shadow migration bytes

When to check

Breakdowns

Further Analysis

Data Movement Shadow migration ops

Data Movement: Shadow migration ops

When to check

Breakdowns

Further Analysis

Data Movement Shadow migration requests

Data Movement: Shadow migration requests

When to check

Breakdowns

Further Analysis

Disk Disks

Disk: Disks

When to check

Breakdowns

Interpretation

Further Analysis

Details

Disk IO bytes

Disk: I/O bytes

When to check

Breakdowns

Further Analysis

Disk IO operations

Disk: I/O operations

When to check

Breakdowns

Further Analysis

Network Device bytes

Network: Device bytes

When to check

Breakdowns

Further Analysis

Network Interface bytes

Network: Interface bytes

Example

When to check

Breakdowns

Further Analysis

Protocol SMB operations

Protocol: SMB operations

Example

When to check

Breakdowns

Further Analysis

Protocol Fibre Channel bytes

Protocol: Fibre Channel bytes

Example

When to check

Breakdowns

Further Analysis

Protocol Fibre Channel operations

Protocol: Fibre Channel operations

Example

When to check

Breakdowns

Further Analysis

Protocol FTP bytes

Protocol: FTP bytes

Example

When to check

Breakdowns

Further Analysis

Protocol HTTPWebDAV requests

Protocol: HTTP/WebDAV requests

When to check

Breakdowns

Further Analysis

Protocol iSCSI bytes

Protocol: iSCSI bytes

When to check

Breakdowns

Further Analysis

Protocol iSCSI operations

Protocol: iSCSI operations

When to check

Breakdowns

Further Analysis

Protocol NFS bytes

Protocol: NFSv bytes

When to Check

Breakdowns

Further Analysis

Protocol NFS operations

Protocol: NFSv operations

When to Check

Breakdowns

Further Analysis

Protocol SFTP bytes

Protocol: SFTP bytes

Example

When to check

Breakdowns

Further Analysis

Protocol SRP bytes

Protocol: SRP bytes

Example

When to check

Breakdowns

Further Analysis

Protocol SRP operations

Protocol: SRP operations

Example

When to check

Breakdowns

Further Analysis

CPU CPUs

CPU: CPUs

When to check

Breakdowns

Details

CPU Kernel spins

CPU: Kernel spins

When to check

Breakdowns

Cache ARC adaptive parameter

Cache: ARC adaptive parameter

When to check

Breakdowns

Cache ARC evicted bytes

Cache: ARC evicted bytes

When to check

Breakdowns

Cache ARC size

Cache: ARC size

When to check

Breakdowns

Cache ARC target size

Cache: ARC target size

When to check

Breakdowns

Cache DNLC accesses

Cache: DNLC accesses

When to check

Breakdowns

Cache DNLC entries

Cache: DNLC entries

When to check

Breakdowns

Cache L2ARC errors

Cache: L2ARC errors

When to check

Breakdowns

Cache L2ARC size

Cache: L2ARC size

When to check

Breakdowns

Data Movement NDMP bytes transferred tofrom disk

Data Movement: NDMP bytes transferred to/from disk

When to check

Breakdowns

Further Analysis

Data Movement NDMP bytes transferred tofrom tape

Data Movement: NDMP bytes transferred to/from tape

When to check

Breakdowns

Further Analysis

Data Movement NDMP file system operations

Data Movement: NDMP file system operations

When to check

Breakdowns

Data Movement NDMP jobs

Data Movement: NDMP jobs

When to check

Breakdowns

Data Movement Replication latencies

Data Movement: Replication latencies

When to check

Breakdowns

Disk Percent utilization

Disk: Percent utilization

When to check

Breakdowns

Notes

Disk ZFS DMU operations

Disk: ZFS DMU operations

When to check

Breakdowns

Disk ZFS logical IO bytes

Disk: ZFS logical I/O bytes

When to check

Breakdowns

Disk ZFS logical IO operations

Disk: ZFS logical I/O operations

When to check

Breakdowns

Memory Dynamic memory usage

Memory: Dynamic memory usage

When to check

Breakdowns

Memory Kernel memory

Memory: Kernel memory

When to check

Breakdowns

Memory Kernel memory in use

Memory: Kernel memory in use

When to check

Breakdowns

Memory Kernel memory lost to fragmentation

Memory: Kernel memory lost to fragmentation

When to check

Breakdowns

Network IP bytes

Network: IP bytes

When to check

Breakdowns

Network IP packets

Network: IP packets

When to check

Breakdowns

Network TCP bytes

Network: TCP bytes

When to check

Breakdowns

Network TCP packets

Network: TCP packets

When to check

Breakdowns

System NSCD backend requests

System: NSCD backend requests

When to check

Breakdowns

System NSCD operations

System: NSCD operations

When to check

Breakdowns

Datasets

Introduction

BUI

CLI

Viewing available datasets

Reading datasets

Suspending and Resuming all datasets

Discarding Data in a Dataset

4.  Performance Impact

Glossary

Protocol SFTP bytes

Protocol: SFTP bytes

This statistic shows SFTP bytes/sec requested by clients to the appliance. Various useful breakdowns are available: to show the client, user and filename of the SFTP requests.

Example

See Protocol: FTP bytes for an example of a similar statistic with similar breakdowns.

When to check

SFTP bytes/sec can be used as an indication of SFTP load, and can be viewed on the dashboard.

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.

Breakdowns

Breakdown
Description
type of operation
SFTP operation type (get/put/...)
user
username of the client
filename
filename for the SFTP operation, if known and cached by the appliance. If the filename is not known it is reported as "<unknown>".
share
the share for this SFTP request.
project
the project for this SFTP request.
client
remote hostname or IP address of the SFTP client.

These breakdowns can be combined to produce powerful statistics. For example:

Further Analysis

See Cache: ARC accesses broken down by hit/miss to see 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.