Monitoring your S3 File Gateway - AWS Storage Gateway
Getting S3 File Gateway health logsUsing Amazon CloudWatch metricsGetting notified about file operationsUnderstanding gateway metricsUnderstanding file share metricsUnderstanding S3 File Gateway audit logs

Monitoring your S3 File Gateway

You can monitor your S3 File Gateway and associated resources in AWS Storage Gateway by using Amazon CloudWatch metrics and audit logs. You can also use CloudWatch Events to get notified when your file operations are done.

Getting S3 File Gateway health logs with CloudWatch log groups

You can use Amazon CloudWatch Logs to get information about the health of your S3 File Gateway and related resources. You can use the logs to monitor your gateway for errors that it encounters. In addition, you can use Amazon CloudWatch subscription filters to automate processing of the log information in real time. For more information, see Real-time Processing of Log Data with Subscriptions in the Amazon CloudWatch User Guide.

For example, you can configure a CloudWatch log group to monitor your gateway and get notified when your S3 File Gateway fails to upload files to an Amazon S3 bucket. You can configure the group either when you are activating the gateway or after your gateway is activated and up and running. For information about how to configure a CloudWatch log group when activating a gateway, see Configure your Amazon S3 File Gateway. For general information about CloudWatch log groups, see Working with Log Groups and Log Streams in the Amazon CloudWatch User Guide.

The following is an example of an error reported by an S3 File Gateway. 

{
    "severity": "ERROR",
    "bucket": "bucket-smb-share2",
    "roleArn": "arn:aws:iam::123456789012:role/amzn-s3-demo-bucket",
    "source": "share-E1A2B34C",
    "type": "InaccessibleStorageClass",
    "operation": "S3Upload",
    "key": "myFolder/myFile.text",
    "gateway": "sgw-B1D123D4",
    "timestamp": "1565740862516"
}

This error means that the S3 File Gateway is unable to upload the object myFolder/myFile.text to Amazon S3 because it has transitioned out of the Amazon S3 Standard storage class to either the S3 Glacier Flexible Retrieval or the S3 Glacier Deep Archive storage class.

In the preceding gateway health log, these items specify the given information:

  • source: share-E1A2B34C indicates the file share that encountered this error.

  • "type": "InaccessibleStorageClass" indicates the type of error that occurred. In this case, this error was encountered when the gateway was trying to upload the specified object to Amazon S3 or read from Amazon S3. However, in this case, the object has transitioned to Amazon S3 Glacier. The value of "type" can be any error that the S3 File Gateway encounters. For a list of possible errors, see Troubleshooting: File Gateway issues.

  • "operation": "S3Upload" indicates that this error occurred when the gateway was trying to upload this object to S3.

  • "key": "myFolder/myFile.text" indicates the object that caused the failure.

  • gateway": "sgw-B1D123D4 indicates the S3 File Gateway that encountered this error.

  • "timestamp": "1565740862516" indicates the time that the error occurred.

For information about how to troubleshoot the errors that may be reported by S3 File Gateway, see Troubleshooting: File Gateway issues.

Configuring a CloudWatch log group after your gateway is activated

The following procedure shows you how to configure a CloudWatch Log Group after your gateway is activated.

To configure a CloudWatch log group to work with your S3 File Gateway

  1. Sign in to the AWS Management Console and open the Storage Gateway console at https://console.aws.amazon.com/storagegateway/home.

  2. In the navigation pane, choose Gateways, and then choose the gateway that you want to configure the CloudWatch log group for.

  3. For Actions, choose Edit gateway information. Or, on the Details tab, under Health logs and Not Enabled, choose Configure log group to open the Edit CustomerGatewayName dialog box.

  4. For Gateway health log group, choose one of the following:

    • Disable logging if you don't want to monitor your gateway using CloudWatch log groups.

    • Create a new log group to create a new CloudWatch log group.

    • Use an existing log group to use a CloudWatch log group that already exists.

      Choose a log group from the Existing log group list.

  5. Choose Save changes.

  6. To see the health logs for your gateway, do the following:

    1. In the navigation pane, choose Gateways, and then choose the gateway that you configured the CloudWatch log group for.

    2. Choose the Details tab, and under Health logs, choose CloudWatch Logs. The Log group details page opens in the CloudWatch console.

Using Amazon CloudWatch metrics

You can get monitoring data for your S3 File Gateway by using either the AWS Management Console or the CloudWatch API. The console displays a series of graphs based on the raw data from the CloudWatch API. The CloudWatch API can also be used through one of the AWS SDKs or Amazon CloudWatch API tools. Depending on your needs, you might prefer to use either the graphs displayed in the console or retrieved from the API.

Regardless of which method you use to work with metrics, you must specify the following information:

  • The metric dimension to work with. A dimension is a name-value pair that helps you to uniquely identify a metric. The dimensions for Storage Gateway are GatewayId and GatewayName. In the CloudWatch console, you can use the Gateway Metrics view to select gateway-specific dimensions. For more information about dimensions, see Dimensions in the Amazon CloudWatch User Guide.

  • The metric name, such as ReadBytes.

The following table summarizes the types of Storage Gateway metric data that are available to you.

Amazon CloudWatch namespace Dimension Description
AWS/StorageGateway GatewayId, GatewayName

These dimensions filter for metric data that describes aspects of the gateway. You can identify a S3 File Gateway to work with by specifying both the GatewayId and the GatewayName dimensions.

Throughput and latency data of a gateway are based on all the file shares in the gateway.

Data is available automatically in 5-minute periods at no charge.

Working with gateway and file metrics is similar to working with other service metrics. You can find a discussion of some of the most common metrics tasks in the CloudWatch documentation listed following:

Getting notified about file operations

Storage Gateway can initiate the following CloudWatch Events when your file operations are done:

  • You can get notified when the gateway finishes the asynchronous uploading of your files from the file share to Amazon S3. Use the NotificationPolicy parameter to request a file upload notification. This sends a notification for each completed file upload to Amazon S3. For more information, see Getting file upload notification.

  • You can get notified when the gateway finishes the asynchronous uploading of your working file set from the file share to Amazon S3. Use the NotifyWhenUploaded API operation to request a working file set upload notification. This sends a notification when all files in the working file set have been uploaded to Amazon S3. For more information, see Getting working file set upload notification.

  • You can get notified when the gateway finishes refreshing the cache for your S3 bucket. When you invoke the RefreshCache operation through the Storage Gateway console or API, subscribe to the notification when the operation is complete. For more information, see Getting refresh cache notification.

When the file operation you requested is done, Storage Gateway sends you a notification through CloudWatch Events. You can configure CloudWatch Events to send the notification through event targets such as Amazon SNS, Amazon SQS, or an AWS Lambda function. For example, you can configure an Amazon SNS target to send the notification to Amazon SNS consumers such as an email or text message. For information about CloudWatch Events, see What is CloudWatch Events?

To set up CloudWatch Events notification

  1. Create a target, such as an Amazon SNS topic or Lambda function, to invoke when the event you requested in Storage Gateway occurs.

  2. Create a rule in the CloudWatch Events console to invoke targets based on an event in Storage Gateway.

  3. In the rule, create an event pattern for the event type. The notification sent when the event matches this rule pattern.

  4. Select the target and configure the settings.

The following example shows a rule that initiates the specified event type in the specified gateway and in the specified AWS Region. For example, you could specify the Storage Gateway File Upload Event as the event type.

{
   "source":[
      "aws.storagegateway"
   ],
   "resources":[
      "arn:aws:storagegateway:AWS Region:account-id
                 :gateway/gateway-id"
   ],
   "detail-type":[
      "Event type"
   ]
}

For information about how to use CloudWatch Events rules, see Creating a CloudWatch Events rule that triggers on an event in the Amazon CloudWatch Events User Guide.

Getting file upload notification

There are two use cases in which you can use file upload notification:

  • For automating in-cloud processing of files that are uploaded, you can call the NotificationPolicy parameter and get back a notification ID. The notification that occurs when the files have been uploaded has the same notification ID as the one that was returned by the API. If you map this notification ID to track the list of files that you are uploading, you can initiate processing of the file that is uploaded in AWS when the event with the same ID is generated.

  • For content distribution use cases, you can have two S3 File Gateways that map to the same Amazon S3 bucket. The file share client for Gateway1 could upload new files to Amazon S3, and the files are read by file share clients on Gateway2. The files upload to Amazon S3, but they are not visible to Gateway2 because it uses a locally cached version of files in Amazon S3. To make the files visible in Gateway2, you can use the NotificationPolicy parameter to request file upload notification from Gateway1 to notify you when the upload file is done. You can then use CloudWatch Events to automatically issue a RefreshCache request for the file share on Gateway2. When the RefreshCache request is complete, the new file is visible in Gateway2.

Example—File upload notification

The following example shows a file upload notification that is sent to you through CloudWatch when the event matches the rule you created. This notification is in JSON format. You can configure this notification to be delivered to the target as a text message. The detail-type is Storage Gateway Object Upload Event.

{
    "version": "0",
    "id": "2649b160-d59d-c97f-3f64-8aaa9ea6aed3",
    "detail-type": "Storage Gateway Object Upload Event",
    "source": "aws.storagegateway",
    "account": "123456789012",
    "time": "2020-11-05T12:34:56Z",
    "region": "us-east-1",
    "resources": [
        "arn:aws:storagegateway:us-east-1:123456789011:share/share-F123D451",
        "arn:aws:storagegateway:us-east-1:123456789011:gateway/sgw-712345DA",
        "arn:aws:s3:::do-not-delete-bucket"
    ],
    "detail": {
        "object-size": 1024,
        "modification-time": "2020-01-05T12:30:00Z",
        "object-key": "my-file.txt",
        "event-type": "object-upload-complete",        
        "prefix": "prefix/",
        "bucket-name": "amzn-s3-demo-bucket",  
    }
}

Field names

Description

version

The current version of the IAM policy.

id

The ID that identifies the IAM policy.

detail-type

A description of the event that initiated the notification that was sent.

source

The AWS service that is the source of the request and notification.

account

The ID of the AWS account where the request and notification were generated from.

time

When the request to upload files to Amazon S3 was made.

region

The AWS Region where the request and notification was sent from.

resources

The Storage Gateway resources that the policy applies to.

object-size

The size of the object in bytes.

modification-time

The time the client modified the file.

object-key

The path to the file.

event-type

The CloudWatch Events that initiated the notification.

prefix

The prefix name of the S3 bucket.

bucket-name

The name of the S3 bucket.

Getting working file set upload notification

There are two use cases in which you can use the working file set upload notification:

  • For automating in-cloud processing of files that are uploaded, you can call the NotifyWhenUploaded API and get back a notification ID. The notification that occurs when the working set of files have been uploaded has the same notification ID as the one that was returned by the API. If you map this notification ID to track the list of files that you are uploading, you can initiate processing of the working set of files that are uploaded in AWS when the event with the same ID is generated.

  • For content distribution use cases, you can have two S3 File Gateways that map to the same Amazon S3 bucket. The file share client for Gateway1 can upload new files to Amazon S3, and the files are read by file share clients on Gateway2. The files upload to Amazon S3, but they aren't visible to Gateway2 because it uses a locally cached version of files in S3. To make the files visible in Gateway2, use the NotifyWhenUploaded API operation to request file upload notification from Gateway1, to notify you when the upload of the working set of files is done. You can then use the CloudWatch Events to automatically issue a RefreshCache request for the file share on Gateway2. When the RefreshCache request is complete, the new files are visible in Gateway2. This operation does not import files into the gateway cache storage. It only updates the cached inventory to reflect changes in the inventory of the objects in the S3 bucket.

Example—Working file set upload notification

The following example shows a working file set upload notification that is sent to you through CloudWatch when the event matches the rule you created. This notification is in JSON format. You can configure this notification to be delivered to the target as a text message. The detail-type is Storage Gateway File Upload Event.

{
    "version": "2012-10-17",
    "id": "2649b160-d59d-c97f-3f64-8aaa9ea6aed3",
    "detail-type": "Storage Gateway File Upload Event",
    "source": "aws.storagegateway",
    "account": "123456789012",
    "time": "2017-11-06T21:34:42Z",
    "region": "us-east-2",
    "resources": [
        "arn:aws:storagegateway:us-east-2:123456789011:share/share-F123D451",
        "arn:aws:storagegateway:us-east-2:123456789011:gateway/sgw-712345DA"
    ],
    "detail": {
        "event-type": "upload-complete",
        "notification-id": "11b3106b-a18a-4890-9d47-a1a755ef5e47",
        "request-received": "2018-02-06T21:34:42Z",
        "completed": "2018-02-06T21:34:53Z"
    }
}

Field names

Description

version

The current version of the IAM policy.

id

The ID that identifies the IAM policy.

detail-type

A description of the event that initiated the notification that was sent.

source

The AWS service that is the source of the request and notification.

account

The ID of the AWS account where the request and notification were generated from.

time

When the request to upload files to Amazon S3 was made.

region

The AWS Region where the request and notification was sent from.

resources

The Storage Gateway resources that the policy applies to.

event-type

The CloudWatch Events that initiated the notification.

notification-id

The randomly generated ID of the notification that was sent. This ID is in UUID format. This is the notification ID that is returned when NotifyWhenUploaded is called.

request-received

When the gateway received the NotifyWhenUploaded request.

completed

When all the files in the working-set were uploaded to Amazon S3.

Getting refresh cache notification

For refresh cache notification use case, you can have two S3 File Gateways that map to the same Amazon S3 bucket and the NFS client for Gateway1 uploads new files to the S3 bucket. The files upload to Amazon S3, but they don't appear in Gateway2 until you refresh the cache. This is because Gateway2 uses a locally cached version of the files in Amazon S3. You might want to do something with the files in Gateway2 when the refresh cache is done. Large files could take a while to show up in Gateway2, so you might want to be notified when the cache refresh is done. You can request refresh cache notification from Gateway2 to notify you when all the files are visible in Gateway2.

Example—Refresh cache notification

The following example shows a refresh cache notification that is sent to you through CloudWatch when the event matches the rule you created. This notification is in JSON format. You can configure this notification to be delivered to the target as a text message. The detail-type is Storage Gateway Refresh Cache Event.

{
    "version": "2012-10-17",
    "id": "2649b160-d59d-c97f-3f64-8aaa9ea6aed3",
    "detail-type": "Storage Gateway Refresh Cache Event",
    "source": "aws.storagegateway",
    "account": "209870788375",
    "time": "2017-11-06T21:34:42Z",
    "region": "us-east-2",
    "resources": [
        "arn:aws:storagegateway:us-east-2:123456789011:share/share-F123D451",
        "arn:aws:storagegateway:us-east-2:123456789011:gateway/sgw-712345DA"
    ],
    "detail": {
        "event-type": "refresh-complete",
        "notification-id": "1c14106b-a18a-4890-9d47-a1a755ef5e47",
        "started": "2018-02-06T21:34:42Z",
        "completed": "2018-02-06T21:34:53Z",
        "folderList": [
            "/"
        ]
    }
}

Field names

Description

version

The current version of the IAM policy.

id

The ID that identifies the IAM policy.

detail-type

A description of the type of the event that initiated the notification that was sent.

source

The AWS service that is the source of the request and notification.

account

The ID of the AWS account where the request and notification were generated from.

time

When the request to refresh the files in working-set was made.

region

The AWS Region where the request and notification was sent from.

resources

The Storage Gateway resources that the policy applies to.

event-type

The CloudWatch Events that initiated the notification.

notification-id

The randomly generated ID of the notification that was sent. This ID is in UUID format. This is the notification ID that is returned when you call RefreshCache.

started

when the gateway received the RefreshCache request and the refresh was started.

completed

When the refresh of the working-set was completed.

folderList

A comma-separated list of the paths of folders that were refreshed in the cache. The default is ["/"].

Understanding gateway metrics

The following table describes metrics that cover S3 File Gateways. Each gateway has a set of metrics associated with it. Some gateway-specific metrics have the same name as certain file-share-specific metrics. These metrics represent the same kinds of measurements, but are scoped to the gateway rather than the file share.

Always specify whether you want to work with a gateway or a file share when working with a particular metric. Specifically, when working with gateway metrics, you must specify the Gateway Name for the gateway whose metric data you want to view. For more information, see Using Amazon CloudWatch metrics.

Note

Some metrics return data points only when new data has been generated during the most recent monitoring period.

The following table describes the metrics that you can use to get information about your S3 File Gateways.

Metric Description
AvailabilityNotifications

This metric reports the number of availability-related health notifications that were generated by the gateway in the reporting period.

Units: Count
CacheFileSize

This metric tracks the size of files in the gateway cache.

Use this metric with the Average statistic to measure the average size of a file in the gateway cache. Use this metric with the Max statistic to measure the maximum size of a file in the gateway cache.

Units: Bytes
CacheFree

This metric reports the number of available bytes in the gateway cache.

Units: Bytes
CacheHitPercent

Percent of application read operations from the gateway that are served from cache. The sample is taken at the end of the reporting period.

When there are no application read operations from the gateway, this metric reports 100 percent.

Units: Percent
CachePercentDirty

The overall percentage of the gateway cache that has not been persisted to AWS. The sample is taken at the end of the reporting period.

Use this metric with the Sum statistic.

Ideally, this metric should remain low.

Units: Percent
CachePercentUsed

The overall percent of the gateway cache storage that is used. The sample is taken at the end of the reporting period.

Units: Percent
CacheUsed

This metric reports the number of used bytes in the gateway cache.

Units: Bytes
CloudBytesDownloaded

The total number of bytes that the gateway downloaded from AWS during the reporting period.

Use this metric with the Sum statistic to measure throughput and with the Samples statistic to measure IOPS.

Units: Bytes
CloudBytesUploaded

The total number of bytes that the gateway uploaded to AWS during the reporting period.

Use this metric with the Sum statistic to measure throughput and with the Samples statistic to measure input/output operations per second (IOPS).

Units: Bytes
FilesFailingUpload

This metric tracks the number of files which are failing to upload to AWS. These files will generate health notifications which contain more information on the issue.

Use this metric with the Sum statistic to show the number of files which are currently failing to upload to AWS.

Units: Count
FileSharesUnavailable

This metric provides the number of file shares on this gateways which are in the Unavailable state.

If this metric reports any file shares are unavailable, then it is likely there is a problem with the gateway which is may cause disruption to your workflow. It is recommended to create an alarm for when this metric reports a non-zero value.

Units: Count
FilesRenamed

This metric tracks the number of files renamed in the reporting period.

Units: Count
HealthNotifications

This metric reports the number of health notifications that were generated by this gateway in the reporting period.

Units: Count
IndexEvictions

This metric reports the number of files whose metadata was evicted from the cached index of file metadata to make room for new entries. The gateway maintains this metadata index, which is populated from the AWS Cloud on demand.

Units: Count
IndexFetches

This metric reports the number of files for which metadata was fetched. The gateway maintains a cached index of file metadata, which is populated from the AWS Cloud on demand.

Units: Count
IoWaitPercent

This metric reports the percentage of time that the CPU is waiting for a response from the local disk.

Units: Percent
MemTotalBytes

This metric reports the total amount of memory on the gateway.

Units: Bytes
MemUsedBytes

This metric reports the amount of used memory on the gateway.

Units: Bytes
NfsSessions

This metric reports the number of NFS sessions that are active on the gateway.

Units: Count
RootDiskFreeBytes

This metric reports the number of available bytes on the root disk of the gateway.

If this metric reports less than 20 GB are free, you should increase the size of the root disk.

To increase the root disk size, you can increase the size of existing root disk on the VM. When the VM is rebooted, gateway recognizes the increased size on the root disk.

Units: Bytes
S3GetObjectRequestTime

This metric reports the time for the gateway to complete S3 get object requests.

Units: Milliseconds
S3PutObjectRequestTime

This metric reports the time for the gateway to complete S3 put object requests.

Units: Milliseconds
S3UploadPartRequestTime

This metric reports the time for the gateway to complete S3 upload part requests.

Units: Milliseconds
SmbV1Sessions

This metric reports the number of SMBv1 sessions that are active on the gateway.

Units: Count
SmbV2Sessions

This metric reports the number of SMBv2 sessions that are active on the gateway.

Units: Count
SmbV3Sessions

This metric reports the number of SMBv3 sessions that are active on the gateway.

Units: Count
TotalCacheSize

This metric reports the total size of the cache.

Units: Bytes
UserCpuPercent

This metric reports the percentage of time that is spent on gateway processing.

Units: Percent

Understanding file share metrics

You can find information following about the Storage Gateway metrics that cover file shares. Each file share has a set of metrics associated with it. Some file share-specific metrics have the same name as certain gateway-specific metrics. These metrics represent the same kinds of measurements, but are scoped to the file share instead.

Always specify whether you want to work with either a gateway or a file share metric before working with a metric. Specifically, when working with file share metrics, you must specify the File share ID that identifies the file share for which you are interested in viewing metrics. For more information, see Using Amazon CloudWatch metrics.

Note

Some metrics return data points only when new data has been generated during the most recent monitoring period.

The following table describes the Storage Gateway metrics that you can use to get information about your file shares.

Metric Description
CacheHitPercent

Percent of application read operations from the file shares that are served from cache. The sample is taken at the end of the reporting period.

When there are no application read operations from the file share, this metric reports 100 percent.

Units: Percent
CachePercentDirty

The file share's contribution to the overall percentage of the gateway's cache that has not been persisted to AWS. The sample is taken at the end of the reporting period.

Use this metric with the Sum statistic.

Ideally, this metric should remain low.

Note

Use the CachePercentDirty metric of the gateway to view the overall percentage of the gateway's cache that has not been persisted to AWS.

Units: Percent
CachePercentUsed

The file share's contribution to the overall percent use of the gateway's cache storage. The sample is taken at the end of the reporting period.

Use the CachePercentUsed metric of the gateway to view overall percent use of the gateway's cache storage.

Units: Percent
CloudBytesUploaded

The total number of bytes that the gateway uploaded to AWS during the reporting period.

Use this metric with the Sum statistic to measure throughput and with the Samples statistic to measure IOPS.

Units: Bytes
CloudBytesDownloaded

The total number of bytes that the gateway downloaded from AWS during the reporting period.

Use this metric with the Sum statistic to measure throughput and with the Samples statistic to measure input/output operations per second (IOPS).

Units: Bytes
FilesFailingUpload

This metric tracks the number of files which are failing to upload to AWS. These files will generate health notifications which contain more information on the issue.

Use this metric with the Sum statistic to show the number of files which are currently failing to upload to AWS.

Units: Count
ReadBytes

The total number of bytes read from your on-premises applications in the reporting period for a file share.

Use this metric with the Sum statistic to measure throughput and with the Samples statistic to measure IOPS.

Units: Bytes
WriteBytes

The total number of bytes written to your on-premises applications in the reporting period.

Use this metric with the Sum statistic to measure throughput and with the Samples statistic to measure IOPS.

Units: Bytes

Understanding S3 File Gateway audit logs

Amazon S3 File Gateway (S3 File Gateway) audit logs provide you with details about user access to files and folders within a file share. You can use them to monitor user activities and take action if inappropriate activity patterns are identified.

Operations

The following table describes the S3 File Gateway audit log file access operations.

Operation name

Definition

Read Data

Read the contents of a file.

Write Data

Change the contents of a file.

Create

Create a new file or folder.

Rename

Rename an existing file or folder.

Delete

Delete a file or folder.

Write Attributes

Update file or folder metadata (ACLs, owner, group, permissions).

Attributes

The following table describes S3 File Gateway audit log file access attributes.

Attribute

Definition
accessMode The permission setting for the object.
accountDomain (SMB only) The Active Directory (AD) domain that the client’s account belongs to.
accountName (SMB only) The Active Directory user name of the client.
bucket The S3 bucket name.
clientGid (NFS only) The identifier of the group of the user accessing the object.
clientUid (NFS only) The identifier of the user accessing the object.
ctime The time that the object’s content or metadata was modified, set by the client.
groupId The identifier for group owner of the object.
fileSizeInBytes The size of the file in bytes, set by the client at file creation time.
gateway The Storage Gateway ID.
mtime This time that the object's content was modified, set by the client.
newObjectName The full path to the new object after it has been renamed.
objectName The full path to the object.
objectType Defines whether the object is a file or folder.
operation The name of the object access operation.
ownerId The identifier for the owner of the object.
securityDescriptor (SMB only) Shows the discretionary access control list (DACL) set on an object, in SDDL format.
shareName The name of the share that is being accessed.
source The ID of the file share being audited.
sourceAddress The IP address of file share client machine.
status The status of the operation. Only success is logged (failures are logged with the exception of failures arising from permissions denied).
timestamp The time that the operation occurred based on the OS timestamp of the gateway.
version The version of the audit log format.

Attributes logged per operation

The following table describes the S3 File Gateway audit log attributes logged in each file access operation.

Read data

Write data

Create folder

Create file

Rename file/folder

Delete file/folder

Write attributes (change ACL - SMB only)

Write attributes (chown)

Write attributes (chmod)

Write attributes (chgrp)
accessMode X X X
accountDomain (SMB only) X X X X X X X X X X
accountName (SMB only) X X X X X X X X X X
bucket X X X X X X X X X X
clientGid (NFS only) X X X X X X X X X
clientUid (NFS only) X X X X X X X X X
ctime X X
groupId X X
fileSizeInBytes X
gateway X X X X X X X X X X
mtime X X
newObjectName X
objectName X X X X X X X X X X
objectType X X X X X X X X X X
operation X X X X X X X X X X
ownerId X X X
securityDescriptor (SMB only) X X
shareName X X X X X X X X X X
source X X X X X X X X X X
sourceAddress X X X X X X X X X X
status X X X X X X X X X X
timestamp X X X X X X X X X X
version X X X X X X X X X X